/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 19:51:47,166 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 19:51:47,233 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 19:51:47,240 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 19:51:47,240 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 19:51:47,261 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 19:51:47,262 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 19:51:47,263 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 19:51:47,263 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 19:51:47,263 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 19:51:47,264 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 19:51:47,264 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 19:51:47,264 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 19:51:47,265 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 19:51:47,265 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 19:51:47,265 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 19:51:47,266 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 19:51:47,266 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 19:51:47,266 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 19:51:47,267 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 19:51:47,267 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 19:51:47,267 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 19:51:47,268 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 19:51:47,268 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 19:51:47,268 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 19:51:47,269 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 19:51:47,269 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 19:51:47,269 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 19:51:47,270 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 19:51:47,270 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 19:51:47,270 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 19:51:47,271 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 19:51:47,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 19:51:47,271 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 19:51:47,272 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 19:51:47,272 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 19:51:47,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 19:51:47,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 19:51:47,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 19:51:47,590 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 19:51:47,591 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 19:51:47,594 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c [2023-08-26 19:51:48,731 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 19:51:48,934 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 19:51:48,934 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c [2023-08-26 19:51:48,943 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f93473b00/c2f00aec46fa4c53beb690a9de33f0b8/FLAG045b2aa40 [2023-08-26 19:51:48,962 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f93473b00/c2f00aec46fa4c53beb690a9de33f0b8 [2023-08-26 19:51:48,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 19:51:48,970 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 19:51:48,973 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 19:51:48,973 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 19:51:48,977 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 19:51:48,977 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:51:48" (1/1) ... [2023-08-26 19:51:48,978 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f5a5fae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:48, skipping insertion in model container [2023-08-26 19:51:48,978 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:51:48" (1/1) ... [2023-08-26 19:51:49,002 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 19:51:49,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 19:51:49,176 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 19:51:49,213 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 19:51:49,219 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 19:51:49,220 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 19:51:49,226 INFO L206 MainTranslator]: Completed translation [2023-08-26 19:51:49,227 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:49 WrapperNode [2023-08-26 19:51:49,227 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 19:51:49,228 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 19:51:49,228 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 19:51:49,228 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 19:51:49,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:49" (1/1) ... [2023-08-26 19:51:49,247 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:49" (1/1) ... [2023-08-26 19:51:49,278 INFO L138 Inliner]: procedures = 22, calls = 46, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 151 [2023-08-26 19:51:49,278 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 19:51:49,279 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 19:51:49,279 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 19:51:49,280 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 19:51:49,287 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:49" (1/1) ... [2023-08-26 19:51:49,287 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:49" (1/1) ... [2023-08-26 19:51:49,301 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:49" (1/1) ... [2023-08-26 19:51:49,302 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:49" (1/1) ... [2023-08-26 19:51:49,306 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:49" (1/1) ... [2023-08-26 19:51:49,308 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:49" (1/1) ... [2023-08-26 19:51:49,310 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:49" (1/1) ... [2023-08-26 19:51:49,311 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:49" (1/1) ... [2023-08-26 19:51:49,323 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 19:51:49,324 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 19:51:49,324 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 19:51:49,325 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 19:51:49,325 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:49" (1/1) ... [2023-08-26 19:51:49,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 19:51:49,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:49,358 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 19:51:49,372 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 19:51:49,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 19:51:49,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 19:51:49,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 19:51:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 19:51:49,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 19:51:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 19:51:49,403 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 19:51:49,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 19:51:49,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 19:51:49,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 19:51:49,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 19:51:49,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 19:51:49,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 19:51:49,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 19:51:49,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 19:51:49,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 19:51:49,405 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 19:51:49,521 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 19:51:49,524 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 19:51:49,841 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 19:51:49,916 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 19:51:49,916 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 19:51:49,918 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:51:49 BoogieIcfgContainer [2023-08-26 19:51:49,918 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 19:51:49,922 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 19:51:49,922 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 19:51:49,925 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 19:51:49,925 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 07:51:48" (1/3) ... [2023-08-26 19:51:49,926 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32daa3f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:51:49, skipping insertion in model container [2023-08-26 19:51:49,926 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:49" (2/3) ... [2023-08-26 19:51:49,926 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32daa3f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:51:49, skipping insertion in model container [2023-08-26 19:51:49,926 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:51:49" (3/3) ... [2023-08-26 19:51:49,928 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2023-08-26 19:51:49,942 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 19:51:49,942 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-26 19:51:49,943 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 19:51:50,021 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 19:51:50,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 123 transitions, 270 flow [2023-08-26 19:51:50,114 INFO L124 PetriNetUnfolderBase]: 7/120 cut-off events. [2023-08-26 19:51:50,115 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 19:51:50,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 120 events. 7/120 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 134 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2023-08-26 19:51:50,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 123 transitions, 270 flow [2023-08-26 19:51:50,126 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 109 transitions, 236 flow [2023-08-26 19:51:50,130 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 19:51:50,141 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 109 transitions, 236 flow [2023-08-26 19:51:50,144 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 109 transitions, 236 flow [2023-08-26 19:51:50,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 109 transitions, 236 flow [2023-08-26 19:51:50,168 INFO L124 PetriNetUnfolderBase]: 7/109 cut-off events. [2023-08-26 19:51:50,168 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 19:51:50,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 109 events. 7/109 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 131 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2023-08-26 19:51:50,172 INFO L119 LiptonReduction]: Number of co-enabled transitions 1742 [2023-08-26 19:51:54,299 INFO L134 LiptonReduction]: Checked pairs total: 2974 [2023-08-26 19:51:54,300 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-08-26 19:51:54,312 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 19:51:54,317 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;@3eb9e3d3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 19:51:54,318 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-26 19:51:54,319 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 19:51:54,319 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 19:51:54,319 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:51:54,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:54,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 19:51:54,320 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:54,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:54,325 INFO L85 PathProgramCache]: Analyzing trace with hash 522, now seen corresponding path program 1 times [2023-08-26 19:51:54,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:54,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705226313] [2023-08-26 19:51:54,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:54,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:54,414 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 19:51:54,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:54,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705226313] [2023-08-26 19:51:54,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705226313] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:54,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:54,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 19:51:54,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953412196] [2023-08-26 19:51:54,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:54,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 19:51:54,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:54,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 19:51:54,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 19:51:54,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 230 [2023-08-26 19:51:54,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 86 flow. Second operand has 2 states, 2 states have (on average 109.5) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:54,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:54,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 230 [2023-08-26 19:51:54,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:54,601 INFO L124 PetriNetUnfolderBase]: 207/366 cut-off events. [2023-08-26 19:51:54,601 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-26 19:51:54,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764 conditions, 366 events. 207/366 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1741 event pairs, 203 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 612. Up to 359 conditions per place. [2023-08-26 19:51:54,606 INFO L140 encePairwiseOnDemand]: 228/230 looper letters, 28 selfloop transitions, 0 changer transitions 0/32 dead transitions. [2023-08-26 19:51:54,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 138 flow [2023-08-26 19:51:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 19:51:54,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 19:51:54,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 248 transitions. [2023-08-26 19:51:54,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5391304347826087 [2023-08-26 19:51:54,618 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 248 transitions. [2023-08-26 19:51:54,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 248 transitions. [2023-08-26 19:51:54,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:54,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 248 transitions. [2023-08-26 19:51:54,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 124.0) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:54,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:54,628 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:54,630 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 86 flow. Second operand 2 states and 248 transitions. [2023-08-26 19:51:54,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 138 flow [2023-08-26 19:51:54,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 126 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-26 19:51:54,634 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 70 flow [2023-08-26 19:51:54,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=70, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-08-26 19:51:54,639 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -7 predicate places. [2023-08-26 19:51:54,639 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 70 flow [2023-08-26 19:51:54,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 109.5) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:54,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:54,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 19:51:54,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 19:51:54,640 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:54,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:54,640 INFO L85 PathProgramCache]: Analyzing trace with hash 511878, now seen corresponding path program 1 times [2023-08-26 19:51:54,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:54,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585891467] [2023-08-26 19:51:54,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:54,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:54,962 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 19:51:54,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:54,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585891467] [2023-08-26 19:51:54,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585891467] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:54,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:54,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:51:54,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194983303] [2023-08-26 19:51:54,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:54,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:54,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:54,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:54,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:54,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 230 [2023-08-26 19:51:54,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:54,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:54,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 230 [2023-08-26 19:51:54,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:55,040 INFO L124 PetriNetUnfolderBase]: 198/348 cut-off events. [2023-08-26 19:51:55,040 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 19:51:55,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 348 events. 198/348 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1621 event pairs, 194 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 701. Up to 340 conditions per place. [2023-08-26 19:51:55,043 INFO L140 encePairwiseOnDemand]: 227/230 looper letters, 25 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-26 19:51:55,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 118 flow [2023-08-26 19:51:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:55,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 289 transitions. [2023-08-26 19:51:55,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41884057971014493 [2023-08-26 19:51:55,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 289 transitions. [2023-08-26 19:51:55,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 289 transitions. [2023-08-26 19:51:55,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:55,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 289 transitions. [2023-08-26 19:51:55,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,057 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,057 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 70 flow. Second operand 3 states and 289 transitions. [2023-08-26 19:51:55,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 118 flow [2023-08-26 19:51:55,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 118 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 19:51:55,059 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 68 flow [2023-08-26 19:51:55,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-26 19:51:55,063 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -7 predicate places. [2023-08-26 19:51:55,063 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 68 flow [2023-08-26 19:51:55,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:55,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 19:51:55,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 19:51:55,066 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:55,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:55,073 INFO L85 PathProgramCache]: Analyzing trace with hash 511879, now seen corresponding path program 1 times [2023-08-26 19:51:55,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:55,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083007433] [2023-08-26 19:51:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:55,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:55,209 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 19:51:55,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:55,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083007433] [2023-08-26 19:51:55,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083007433] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:55,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:55,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:51:55,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60453774] [2023-08-26 19:51:55,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:55,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:55,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:55,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:55,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:55,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 230 [2023-08-26 19:51:55,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:55,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 230 [2023-08-26 19:51:55,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:55,279 INFO L124 PetriNetUnfolderBase]: 189/330 cut-off events. [2023-08-26 19:51:55,279 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 19:51:55,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 330 events. 189/330 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1527 event pairs, 185 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 666. Up to 322 conditions per place. [2023-08-26 19:51:55,282 INFO L140 encePairwiseOnDemand]: 227/230 looper letters, 23 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-26 19:51:55,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 112 flow [2023-08-26 19:51:55,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:55,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-08-26 19:51:55,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028985507246377 [2023-08-26 19:51:55,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-08-26 19:51:55,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-08-26 19:51:55,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:55,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-08-26 19:51:55,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,287 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,288 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 68 flow. Second operand 3 states and 278 transitions. [2023-08-26 19:51:55,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 112 flow [2023-08-26 19:51:55,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 28 transitions, 111 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:55,289 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 65 flow [2023-08-26 19:51:55,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-08-26 19:51:55,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -8 predicate places. [2023-08-26 19:51:55,291 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 65 flow [2023-08-26 19:51:55,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:55,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 19:51:55,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 19:51:55,298 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:55,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:55,298 INFO L85 PathProgramCache]: Analyzing trace with hash 491926075, now seen corresponding path program 1 times [2023-08-26 19:51:55,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:55,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567343077] [2023-08-26 19:51:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:55,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:55,403 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 19:51:55,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:55,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567343077] [2023-08-26 19:51:55,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567343077] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:55,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:55,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:51:55,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810317045] [2023-08-26 19:51:55,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:55,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:55,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:55,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:55,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:55,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 230 [2023-08-26 19:51:55,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:55,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 230 [2023-08-26 19:51:55,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:55,468 INFO L124 PetriNetUnfolderBase]: 176/306 cut-off events. [2023-08-26 19:51:55,468 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 19:51:55,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 306 events. 176/306 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1355 event pairs, 172 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 619. Up to 298 conditions per place. [2023-08-26 19:51:55,472 INFO L140 encePairwiseOnDemand]: 227/230 looper letters, 21 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-26 19:51:55,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 26 transitions, 105 flow [2023-08-26 19:51:55,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:55,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:55,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2023-08-26 19:51:55,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2023-08-26 19:51:55,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2023-08-26 19:51:55,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2023-08-26 19:51:55,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:55,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2023-08-26 19:51:55,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,477 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 65 flow. Second operand 3 states and 285 transitions. [2023-08-26 19:51:55,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 26 transitions, 105 flow [2023-08-26 19:51:55,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 26 transitions, 104 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:55,479 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 62 flow [2023-08-26 19:51:55,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2023-08-26 19:51:55,480 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -9 predicate places. [2023-08-26 19:51:55,480 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 62 flow [2023-08-26 19:51:55,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:55,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 19:51:55,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 19:51:55,481 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:55,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:55,482 INFO L85 PathProgramCache]: Analyzing trace with hash 491926077, now seen corresponding path program 1 times [2023-08-26 19:51:55,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:55,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036170406] [2023-08-26 19:51:55,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:55,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:55,526 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 19:51:55,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:55,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036170406] [2023-08-26 19:51:55,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036170406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:55,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:55,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:51:55,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38618347] [2023-08-26 19:51:55,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:55,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:55,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:55,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:55,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:55,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 230 [2023-08-26 19:51:55,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 62 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 19:51:55,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:55,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 230 [2023-08-26 19:51:55,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:55,586 INFO L124 PetriNetUnfolderBase]: 163/282 cut-off events. [2023-08-26 19:51:55,587 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 19:51:55,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 282 events. 163/282 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1223 event pairs, 159 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 572. Up to 274 conditions per place. [2023-08-26 19:51:55,590 INFO L140 encePairwiseOnDemand]: 227/230 looper letters, 19 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-26 19:51:55,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 98 flow [2023-08-26 19:51:55,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:55,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 274 transitions. [2023-08-26 19:51:55,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39710144927536234 [2023-08-26 19:51:55,592 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 274 transitions. [2023-08-26 19:51:55,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 274 transitions. [2023-08-26 19:51:55,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:55,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 274 transitions. [2023-08-26 19:51:55,594 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 19:51:55,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,596 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,596 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 62 flow. Second operand 3 states and 274 transitions. [2023-08-26 19:51:55,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 24 transitions, 98 flow [2023-08-26 19:51:55,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 24 transitions, 97 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:55,598 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 59 flow [2023-08-26 19:51:55,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-26 19:51:55,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -10 predicate places. [2023-08-26 19:51:55,600 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 59 flow [2023-08-26 19:51:55,600 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 19:51:55,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:55,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:55,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 19:51:55,601 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:55,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:55,601 INFO L85 PathProgramCache]: Analyzing trace with hash 294568666, now seen corresponding path program 1 times [2023-08-26 19:51:55,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:55,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726604495] [2023-08-26 19:51:55,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:55,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:55,707 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 19:51:55,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:55,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726604495] [2023-08-26 19:51:55,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726604495] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:55,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:55,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 19:51:55,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383523622] [2023-08-26 19:51:55,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:55,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 19:51:55,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:55,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 19:51:55,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 19:51:55,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 230 [2023-08-26 19:51:55,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 59 flow. Second operand has 5 states, 5 states have (on average 79.4) internal successors, (397), 5 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:55,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 230 [2023-08-26 19:51:55,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:55,778 INFO L124 PetriNetUnfolderBase]: 130/231 cut-off events. [2023-08-26 19:51:55,778 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 19:51:55,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 475 conditions, 231 events. 130/231 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 949 event pairs, 126 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 471. Up to 223 conditions per place. [2023-08-26 19:51:55,780 INFO L140 encePairwiseOnDemand]: 228/230 looper letters, 18 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-08-26 19:51:55,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 23 transitions, 95 flow [2023-08-26 19:51:55,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:55,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2023-08-26 19:51:55,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3681159420289855 [2023-08-26 19:51:55,782 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2023-08-26 19:51:55,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2023-08-26 19:51:55,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:55,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2023-08-26 19:51:55,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,786 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,786 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 59 flow. Second operand 3 states and 254 transitions. [2023-08-26 19:51:55,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 23 transitions, 95 flow [2023-08-26 19:51:55,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 23 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:55,787 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 58 flow [2023-08-26 19:51:55,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-26 19:51:55,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -10 predicate places. [2023-08-26 19:51:55,791 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 58 flow [2023-08-26 19:51:55,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.4) internal successors, (397), 5 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:55,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:55,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 19:51:55,792 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:55,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:55,792 INFO L85 PathProgramCache]: Analyzing trace with hash 294568664, now seen corresponding path program 1 times [2023-08-26 19:51:55,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:55,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239104695] [2023-08-26 19:51:55,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:55,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:55,832 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 19:51:55,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:55,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239104695] [2023-08-26 19:51:55,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239104695] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:55,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:55,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:51:55,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033101563] [2023-08-26 19:51:55,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:55,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:55,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:55,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:55,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:55,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 230 [2023-08-26 19:51:55,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:55,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 230 [2023-08-26 19:51:55,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:55,880 INFO L124 PetriNetUnfolderBase]: 97/180 cut-off events. [2023-08-26 19:51:55,880 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 19:51:55,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 180 events. 97/180 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 699 event pairs, 93 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 370. Up to 172 conditions per place. [2023-08-26 19:51:55,881 INFO L140 encePairwiseOnDemand]: 228/230 looper letters, 17 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-08-26 19:51:55,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 22 transitions, 92 flow [2023-08-26 19:51:55,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:55,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2023-08-26 19:51:55,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057971014492754 [2023-08-26 19:51:55,883 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 280 transitions. [2023-08-26 19:51:55,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 280 transitions. [2023-08-26 19:51:55,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:55,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 280 transitions. [2023-08-26 19:51:55,884 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 19:51:55,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,886 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 58 flow. Second operand 3 states and 280 transitions. [2023-08-26 19:51:55,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 22 transitions, 92 flow [2023-08-26 19:51:55,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 22 transitions, 91 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:55,888 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 57 flow [2023-08-26 19:51:55,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2023-08-26 19:51:55,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -10 predicate places. [2023-08-26 19:51:55,889 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 57 flow [2023-08-26 19:51:55,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:55,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:55,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:55,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 19:51:55,889 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:55,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:55,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1817725615, now seen corresponding path program 1 times [2023-08-26 19:51:55,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:55,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225872252] [2023-08-26 19:51:55,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:55,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:56,065 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 19:51:56,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:56,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225872252] [2023-08-26 19:51:56,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225872252] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:56,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:56,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 19:51:56,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841968651] [2023-08-26 19:51:56,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:56,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 19:51:56,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:56,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 19:51:56,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 19:51:56,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 230 [2023-08-26 19:51:56,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:56,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:56,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 230 [2023-08-26 19:51:56,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:56,171 INFO L124 PetriNetUnfolderBase]: 171/270 cut-off events. [2023-08-26 19:51:56,172 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:51:56,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 270 events. 171/270 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 783 event pairs, 9 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 562. Up to 125 conditions per place. [2023-08-26 19:51:56,173 INFO L140 encePairwiseOnDemand]: 226/230 looper letters, 36 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-08-26 19:51:56,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 175 flow [2023-08-26 19:51:56,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 19:51:56,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 19:51:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 437 transitions. [2023-08-26 19:51:56,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2023-08-26 19:51:56,176 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 437 transitions. [2023-08-26 19:51:56,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 437 transitions. [2023-08-26 19:51:56,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:56,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 437 transitions. [2023-08-26 19:51:56,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.25) internal successors, (437), 4 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:56,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:56,179 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:56,179 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 57 flow. Second operand 4 states and 437 transitions. [2023-08-26 19:51:56,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 175 flow [2023-08-26 19:51:56,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 40 transitions, 171 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 19:51:56,181 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 74 flow [2023-08-26 19:51:56,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2023-08-26 19:51:56,181 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -7 predicate places. [2023-08-26 19:51:56,181 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 74 flow [2023-08-26 19:51:56,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:56,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:56,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:56,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 19:51:56,182 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:56,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:56,183 INFO L85 PathProgramCache]: Analyzing trace with hash 992984619, now seen corresponding path program 2 times [2023-08-26 19:51:56,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:56,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312600453] [2023-08-26 19:51:56,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:56,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:56,316 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 19:51:56,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:56,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312600453] [2023-08-26 19:51:56,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312600453] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:56,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:56,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 19:51:56,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309732938] [2023-08-26 19:51:56,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:56,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 19:51:56,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:56,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 19:51:56,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 19:51:56,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 230 [2023-08-26 19:51:56,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:56,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:56,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 230 [2023-08-26 19:51:56,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:56,414 INFO L124 PetriNetUnfolderBase]: 144/231 cut-off events. [2023-08-26 19:51:56,414 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2023-08-26 19:51:56,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 231 events. 144/231 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 593 event pairs, 14 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 544. Up to 119 conditions per place. [2023-08-26 19:51:56,415 INFO L140 encePairwiseOnDemand]: 226/230 looper letters, 32 selfloop transitions, 6 changer transitions 0/38 dead transitions. [2023-08-26 19:51:56,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 187 flow [2023-08-26 19:51:56,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 19:51:56,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 19:51:56,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 433 transitions. [2023-08-26 19:51:56,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4706521739130435 [2023-08-26 19:51:56,417 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 433 transitions. [2023-08-26 19:51:56,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 433 transitions. [2023-08-26 19:51:56,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:56,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 433 transitions. [2023-08-26 19:51:56,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:56,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:56,421 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:56,421 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 74 flow. Second operand 4 states and 433 transitions. [2023-08-26 19:51:56,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 187 flow [2023-08-26 19:51:56,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:56,422 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 102 flow [2023-08-26 19:51:56,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-08-26 19:51:56,423 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-08-26 19:51:56,423 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 102 flow [2023-08-26 19:51:56,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:56,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:56,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:56,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 19:51:56,424 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:56,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:56,424 INFO L85 PathProgramCache]: Analyzing trace with hash -328954607, now seen corresponding path program 3 times [2023-08-26 19:51:56,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:56,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107248617] [2023-08-26 19:51:56,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:56,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:56,542 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 19:51:56,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:56,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107248617] [2023-08-26 19:51:56,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107248617] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:56,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:56,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 19:51:56,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672024513] [2023-08-26 19:51:56,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:56,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 19:51:56,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:56,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 19:51:56,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 19:51:56,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 230 [2023-08-26 19:51:56,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 102.6) internal successors, (513), 5 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:56,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:56,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 230 [2023-08-26 19:51:56,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:56,678 INFO L124 PetriNetUnfolderBase]: 156/251 cut-off events. [2023-08-26 19:51:56,678 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-26 19:51:56,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 251 events. 156/251 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 691 event pairs, 12 based on Foata normal form. 8/259 useless extension candidates. Maximal degree in co-relation 651. Up to 88 conditions per place. [2023-08-26 19:51:56,680 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 38 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2023-08-26 19:51:56,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 46 transitions, 242 flow [2023-08-26 19:51:56,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 19:51:56,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 19:51:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 540 transitions. [2023-08-26 19:51:56,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46956521739130436 [2023-08-26 19:51:56,682 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 540 transitions. [2023-08-26 19:51:56,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 540 transitions. [2023-08-26 19:51:56,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:56,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 540 transitions. [2023-08-26 19:51:56,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:56,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:56,686 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:56,686 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 102 flow. Second operand 5 states and 540 transitions. [2023-08-26 19:51:56,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 46 transitions, 242 flow [2023-08-26 19:51:56,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:56,688 INFO L231 Difference]: Finished difference. Result has 44 places, 29 transitions, 132 flow [2023-08-26 19:51:56,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=44, PETRI_TRANSITIONS=29} [2023-08-26 19:51:56,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-26 19:51:56,689 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 29 transitions, 132 flow [2023-08-26 19:51:56,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.6) internal successors, (513), 5 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:56,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:56,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:56,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 19:51:56,690 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:56,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:56,690 INFO L85 PathProgramCache]: Analyzing trace with hash 493774405, now seen corresponding path program 4 times [2023-08-26 19:51:56,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:56,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851072599] [2023-08-26 19:51:56,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:56,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:56,885 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 19:51:56,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:56,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851072599] [2023-08-26 19:51:56,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851072599] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:56,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:56,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 19:51:56,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688574890] [2023-08-26 19:51:56,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:56,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 19:51:56,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:56,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 19:51:56,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 19:51:56,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 230 [2023-08-26 19:51:56,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 29 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:56,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:56,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 230 [2023-08-26 19:51:56,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:57,052 INFO L124 PetriNetUnfolderBase]: 263/424 cut-off events. [2023-08-26 19:51:57,052 INFO L125 PetriNetUnfolderBase]: For 496/496 co-relation queries the response was YES. [2023-08-26 19:51:57,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 424 events. 263/424 cut-off events. For 496/496 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1407 event pairs, 25 based on Foata normal form. 14/438 useless extension candidates. Maximal degree in co-relation 1243. Up to 246 conditions per place. [2023-08-26 19:51:57,055 INFO L140 encePairwiseOnDemand]: 223/230 looper letters, 34 selfloop transitions, 3 changer transitions 30/67 dead transitions. [2023-08-26 19:51:57,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 67 transitions, 414 flow [2023-08-26 19:51:57,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 19:51:57,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 19:51:57,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 739 transitions. [2023-08-26 19:51:57,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45900621118012425 [2023-08-26 19:51:57,057 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 739 transitions. [2023-08-26 19:51:57,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 739 transitions. [2023-08-26 19:51:57,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:57,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 739 transitions. [2023-08-26 19:51:57,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.57142857142857) internal successors, (739), 7 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:57,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:57,063 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 230.0) internal successors, (1840), 8 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:57,064 INFO L175 Difference]: Start difference. First operand has 44 places, 29 transitions, 132 flow. Second operand 7 states and 739 transitions. [2023-08-26 19:51:57,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 67 transitions, 414 flow [2023-08-26 19:51:57,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 67 transitions, 402 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 19:51:57,070 INFO L231 Difference]: Finished difference. Result has 53 places, 30 transitions, 161 flow [2023-08-26 19:51:57,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=161, PETRI_PLACES=53, PETRI_TRANSITIONS=30} [2023-08-26 19:51:57,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2023-08-26 19:51:57,071 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 30 transitions, 161 flow [2023-08-26 19:51:57,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:57,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:57,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:57,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 19:51:57,072 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:57,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:57,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1765544436, now seen corresponding path program 1 times [2023-08-26 19:51:57,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:57,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477092119] [2023-08-26 19:51:57,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:57,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:57,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:57,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477092119] [2023-08-26 19:51:57,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477092119] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:57,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:57,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 19:51:57,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141753096] [2023-08-26 19:51:57,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:57,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 19:51:57,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:57,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 19:51:57,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 19:51:57,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 230 [2023-08-26 19:51:57,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 30 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 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 19:51:57,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:57,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 230 [2023-08-26 19:51:57,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:57,554 INFO L124 PetriNetUnfolderBase]: 326/529 cut-off events. [2023-08-26 19:51:57,554 INFO L125 PetriNetUnfolderBase]: For 1045/1045 co-relation queries the response was YES. [2023-08-26 19:51:57,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 529 events. 326/529 cut-off events. For 1045/1045 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1847 event pairs, 14 based on Foata normal form. 16/545 useless extension candidates. Maximal degree in co-relation 1987. Up to 169 conditions per place. [2023-08-26 19:51:57,558 INFO L140 encePairwiseOnDemand]: 221/230 looper letters, 67 selfloop transitions, 36 changer transitions 0/103 dead transitions. [2023-08-26 19:51:57,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 103 transitions, 758 flow [2023-08-26 19:51:57,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 19:51:57,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 19:51:57,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 962 transitions. [2023-08-26 19:51:57,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647342995169082 [2023-08-26 19:51:57,562 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 962 transitions. [2023-08-26 19:51:57,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 962 transitions. [2023-08-26 19:51:57,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:57,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 962 transitions. [2023-08-26 19:51:57,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 106.88888888888889) internal successors, (962), 9 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:57,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 230.0) internal successors, (2300), 10 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:57,570 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 230.0) internal successors, (2300), 10 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:57,570 INFO L175 Difference]: Start difference. First operand has 53 places, 30 transitions, 161 flow. Second operand 9 states and 962 transitions. [2023-08-26 19:51:57,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 103 transitions, 758 flow [2023-08-26 19:51:57,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 103 transitions, 720 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-08-26 19:51:57,578 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 523 flow [2023-08-26 19:51:57,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=523, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2023-08-26 19:51:57,580 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2023-08-26 19:51:57,580 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 523 flow [2023-08-26 19:51:57,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 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 19:51:57,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:57,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:57,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 19:51:57,581 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:57,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:57,581 INFO L85 PathProgramCache]: Analyzing trace with hash 75611696, now seen corresponding path program 2 times [2023-08-26 19:51:57,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:57,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269859124] [2023-08-26 19:51:57,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:57,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:57,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:57,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269859124] [2023-08-26 19:51:57,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269859124] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:57,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:57,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 19:51:57,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818423809] [2023-08-26 19:51:57,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:57,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 19:51:57,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:57,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 19:51:57,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 19:51:57,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 230 [2023-08-26 19:51:57,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 523 flow. Second operand has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 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 19:51:57,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:57,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 230 [2023-08-26 19:51:57,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:58,098 INFO L124 PetriNetUnfolderBase]: 474/831 cut-off events. [2023-08-26 19:51:58,099 INFO L125 PetriNetUnfolderBase]: For 4595/4595 co-relation queries the response was YES. [2023-08-26 19:51:58,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4249 conditions, 831 events. 474/831 cut-off events. For 4595/4595 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3459 event pairs, 39 based on Foata normal form. 20/851 useless extension candidates. Maximal degree in co-relation 4229. Up to 257 conditions per place. [2023-08-26 19:51:58,106 INFO L140 encePairwiseOnDemand]: 221/230 looper letters, 101 selfloop transitions, 63 changer transitions 0/164 dead transitions. [2023-08-26 19:51:58,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 164 transitions, 1624 flow [2023-08-26 19:51:58,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 19:51:58,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 19:51:58,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 976 transitions. [2023-08-26 19:51:58,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714975845410628 [2023-08-26 19:51:58,110 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 976 transitions. [2023-08-26 19:51:58,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 976 transitions. [2023-08-26 19:51:58,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:58,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 976 transitions. [2023-08-26 19:51:58,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 108.44444444444444) internal successors, (976), 9 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:58,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 230.0) internal successors, (2300), 10 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:58,116 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 230.0) internal successors, (2300), 10 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:58,116 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 523 flow. Second operand 9 states and 976 transitions. [2023-08-26 19:51:58,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 164 transitions, 1624 flow [2023-08-26 19:51:58,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 164 transitions, 1592 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-08-26 19:51:58,139 INFO L231 Difference]: Finished difference. Result has 78 places, 103 transitions, 1255 flow [2023-08-26 19:51:58,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1255, PETRI_PLACES=78, PETRI_TRANSITIONS=103} [2023-08-26 19:51:58,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2023-08-26 19:51:58,140 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 103 transitions, 1255 flow [2023-08-26 19:51:58,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 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 19:51:58,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:58,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:58,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 19:51:58,141 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:58,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:58,141 INFO L85 PathProgramCache]: Analyzing trace with hash 765466292, now seen corresponding path program 3 times [2023-08-26 19:51:58,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:58,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941190590] [2023-08-26 19:51:58,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:58,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:58,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:58,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941190590] [2023-08-26 19:51:58,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941190590] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:58,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:58,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 19:51:58,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904907845] [2023-08-26 19:51:58,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:58,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 19:51:58,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:58,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 19:51:58,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 19:51:58,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 230 [2023-08-26 19:51:58,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 103 transitions, 1255 flow. Second operand has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 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 19:51:58,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:58,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 230 [2023-08-26 19:51:58,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:58,615 INFO L124 PetriNetUnfolderBase]: 553/944 cut-off events. [2023-08-26 19:51:58,615 INFO L125 PetriNetUnfolderBase]: For 9125/9125 co-relation queries the response was YES. [2023-08-26 19:51:58,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5943 conditions, 944 events. 553/944 cut-off events. For 9125/9125 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3942 event pairs, 8 based on Foata normal form. 36/980 useless extension candidates. Maximal degree in co-relation 5915. Up to 458 conditions per place. [2023-08-26 19:51:58,624 INFO L140 encePairwiseOnDemand]: 221/230 looper letters, 100 selfloop transitions, 42 changer transitions 40/182 dead transitions. [2023-08-26 19:51:58,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 182 transitions, 2467 flow [2023-08-26 19:51:58,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 19:51:58,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 19:51:58,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 952 transitions. [2023-08-26 19:51:58,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599033816425121 [2023-08-26 19:51:58,628 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 952 transitions. [2023-08-26 19:51:58,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 952 transitions. [2023-08-26 19:51:58,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:58,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 952 transitions. [2023-08-26 19:51:58,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 105.77777777777777) internal successors, (952), 9 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:58,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 230.0) internal successors, (2300), 10 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:58,634 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 230.0) internal successors, (2300), 10 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:58,634 INFO L175 Difference]: Start difference. First operand has 78 places, 103 transitions, 1255 flow. Second operand 9 states and 952 transitions. [2023-08-26 19:51:58,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 182 transitions, 2467 flow [2023-08-26 19:51:58,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 182 transitions, 2343 flow, removed 62 selfloop flow, removed 0 redundant places. [2023-08-26 19:51:58,676 INFO L231 Difference]: Finished difference. Result has 92 places, 107 transitions, 1435 flow [2023-08-26 19:51:58,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1435, PETRI_PLACES=92, PETRI_TRANSITIONS=107} [2023-08-26 19:51:58,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2023-08-26 19:51:58,678 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 107 transitions, 1435 flow [2023-08-26 19:51:58,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 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 19:51:58,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:58,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:58,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 19:51:58,678 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:51:58,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:58,679 INFO L85 PathProgramCache]: Analyzing trace with hash 736589086, now seen corresponding path program 4 times [2023-08-26 19:51:58,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:58,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373581643] [2023-08-26 19:51:58,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:58,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:58,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:58,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373581643] [2023-08-26 19:51:58,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373581643] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:58,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478335150] [2023-08-26 19:51:58,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 19:51:58,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:58,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:58,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:51:58,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 19:51:59,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 19:51:59,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:59,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 19:51:59,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:59,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:59,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478335150] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:59,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:59,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-26 19:51:59,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529017246] [2023-08-26 19:51:59,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:59,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 19:51:59,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:59,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 19:51:59,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-26 19:51:59,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 230 [2023-08-26 19:51:59,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 107 transitions, 1435 flow. Second operand has 12 states, 12 states have (on average 98.66666666666667) internal successors, (1184), 12 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:59,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:59,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 230 [2023-08-26 19:51:59,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:00,159 INFO L124 PetriNetUnfolderBase]: 1024/1805 cut-off events. [2023-08-26 19:52:00,159 INFO L125 PetriNetUnfolderBase]: For 20810/20810 co-relation queries the response was YES. [2023-08-26 19:52:00,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12371 conditions, 1805 events. 1024/1805 cut-off events. For 20810/20810 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9469 event pairs, 27 based on Foata normal form. 82/1887 useless extension candidates. Maximal degree in co-relation 12337. Up to 559 conditions per place. [2023-08-26 19:52:00,229 INFO L140 encePairwiseOnDemand]: 223/230 looper letters, 169 selfloop transitions, 101 changer transitions 117/387 dead transitions. [2023-08-26 19:52:00,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 387 transitions, 5919 flow [2023-08-26 19:52:00,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-26 19:52:00,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-26 19:52:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2164 transitions. [2023-08-26 19:52:00,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4480331262939959 [2023-08-26 19:52:00,237 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2164 transitions. [2023-08-26 19:52:00,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2164 transitions. [2023-08-26 19:52:00,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:00,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2164 transitions. [2023-08-26 19:52:00,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 103.04761904761905) internal successors, (2164), 21 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:00,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 230.0) internal successors, (5060), 22 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:00,249 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 230.0) internal successors, (5060), 22 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:00,249 INFO L175 Difference]: Start difference. First operand has 92 places, 107 transitions, 1435 flow. Second operand 21 states and 2164 transitions. [2023-08-26 19:52:00,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 387 transitions, 5919 flow [2023-08-26 19:52:00,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 387 transitions, 5669 flow, removed 70 selfloop flow, removed 5 redundant places. [2023-08-26 19:52:00,378 INFO L231 Difference]: Finished difference. Result has 118 places, 177 transitions, 2840 flow [2023-08-26 19:52:00,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2840, PETRI_PLACES=118, PETRI_TRANSITIONS=177} [2023-08-26 19:52:00,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2023-08-26 19:52:00,378 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 177 transitions, 2840 flow [2023-08-26 19:52:00,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 98.66666666666667) internal successors, (1184), 12 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:00,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:00,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:00,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 19:52:00,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-26 19:52:00,585 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:52:00,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:00,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1692498399, now seen corresponding path program 1 times [2023-08-26 19:52:00,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:00,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756253091] [2023-08-26 19:52:00,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:00,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:00,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:00,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756253091] [2023-08-26 19:52:00,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756253091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:52:00,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748456] [2023-08-26 19:52:00,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:00,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:52:00,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:52:00,809 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:52:00,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 19:52:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:00,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 19:52:00,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:52:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:00,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:52:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:01,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:52:01,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:52:01,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-26 19:52:01,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679165259] [2023-08-26 19:52:01,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:52:01,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 19:52:01,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:01,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 19:52:01,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-08-26 19:52:01,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 230 [2023-08-26 19:52:01,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 177 transitions, 2840 flow. Second operand has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:01,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:01,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 230 [2023-08-26 19:52:01,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:01,882 INFO L124 PetriNetUnfolderBase]: 977/1690 cut-off events. [2023-08-26 19:52:01,882 INFO L125 PetriNetUnfolderBase]: For 20529/20529 co-relation queries the response was YES. [2023-08-26 19:52:01,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12211 conditions, 1690 events. 977/1690 cut-off events. For 20529/20529 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8243 event pairs, 15 based on Foata normal form. 64/1754 useless extension candidates. Maximal degree in co-relation 12168. Up to 521 conditions per place. [2023-08-26 19:52:01,903 INFO L140 encePairwiseOnDemand]: 223/230 looper letters, 140 selfloop transitions, 64 changer transitions 158/362 dead transitions. [2023-08-26 19:52:01,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 362 transitions, 5933 flow [2023-08-26 19:52:01,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 19:52:01,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 19:52:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1757 transitions. [2023-08-26 19:52:01,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44936061381074166 [2023-08-26 19:52:01,909 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1757 transitions. [2023-08-26 19:52:01,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1757 transitions. [2023-08-26 19:52:01,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:01,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1757 transitions. [2023-08-26 19:52:01,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 103.3529411764706) internal successors, (1757), 17 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:01,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 230.0) internal successors, (4140), 18 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:01,920 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 230.0) internal successors, (4140), 18 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:01,920 INFO L175 Difference]: Start difference. First operand has 118 places, 177 transitions, 2840 flow. Second operand 17 states and 1757 transitions. [2023-08-26 19:52:01,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 362 transitions, 5933 flow [2023-08-26 19:52:02,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 362 transitions, 5141 flow, removed 275 selfloop flow, removed 8 redundant places. [2023-08-26 19:52:02,057 INFO L231 Difference]: Finished difference. Result has 125 places, 153 transitions, 2177 flow [2023-08-26 19:52:02,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2177, PETRI_PLACES=125, PETRI_TRANSITIONS=153} [2023-08-26 19:52:02,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2023-08-26 19:52:02,058 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 153 transitions, 2177 flow [2023-08-26 19:52:02,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:02,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:02,059 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:02,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 19:52:02,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-26 19:52:02,264 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:52:02,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:02,265 INFO L85 PathProgramCache]: Analyzing trace with hash -352320368, now seen corresponding path program 5 times [2023-08-26 19:52:02,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:02,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510635317] [2023-08-26 19:52:02,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:02,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:02,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:02,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510635317] [2023-08-26 19:52:02,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510635317] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:52:02,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105685031] [2023-08-26 19:52:02,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 19:52:02,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:52:02,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:52:02,643 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:52:02,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 19:52:02,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-26 19:52:02,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:52:02,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 19:52:02,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:52:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:02,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:52:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:03,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105685031] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:52:03,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:52:03,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-26 19:52:03,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159461997] [2023-08-26 19:52:03,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:52:03,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 19:52:03,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:03,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 19:52:03,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-08-26 19:52:03,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 230 [2023-08-26 19:52:03,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 153 transitions, 2177 flow. Second operand has 18 states, 18 states have (on average 97.72222222222223) internal successors, (1759), 18 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:03,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:03,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 230 [2023-08-26 19:52:03,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:05,827 INFO L124 PetriNetUnfolderBase]: 2483/4370 cut-off events. [2023-08-26 19:52:05,827 INFO L125 PetriNetUnfolderBase]: For 52156/52156 co-relation queries the response was YES. [2023-08-26 19:52:05,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29913 conditions, 4370 events. 2483/4370 cut-off events. For 52156/52156 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 26716 event pairs, 23 based on Foata normal form. 112/4482 useless extension candidates. Maximal degree in co-relation 29869. Up to 1429 conditions per place. [2023-08-26 19:52:05,888 INFO L140 encePairwiseOnDemand]: 223/230 looper letters, 300 selfloop transitions, 227 changer transitions 397/924 dead transitions. [2023-08-26 19:52:05,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 924 transitions, 13915 flow [2023-08-26 19:52:05,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-26 19:52:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-26 19:52:05,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 5055 transitions. [2023-08-26 19:52:05,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44853593611357584 [2023-08-26 19:52:05,900 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 5055 transitions. [2023-08-26 19:52:05,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 5055 transitions. [2023-08-26 19:52:05,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:05,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 5055 transitions. [2023-08-26 19:52:05,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 103.16326530612245) internal successors, (5055), 49 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:05,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 230.0) internal successors, (11500), 50 states have internal predecessors, (11500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:05,943 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 230.0) internal successors, (11500), 50 states have internal predecessors, (11500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:05,943 INFO L175 Difference]: Start difference. First operand has 125 places, 153 transitions, 2177 flow. Second operand 49 states and 5055 transitions. [2023-08-26 19:52:05,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 924 transitions, 13915 flow [2023-08-26 19:52:06,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 924 transitions, 13121 flow, removed 244 selfloop flow, removed 13 redundant places. [2023-08-26 19:52:06,310 INFO L231 Difference]: Finished difference. Result has 162 places, 315 transitions, 5137 flow [2023-08-26 19:52:06,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=5137, PETRI_PLACES=162, PETRI_TRANSITIONS=315} [2023-08-26 19:52:06,310 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2023-08-26 19:52:06,310 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 315 transitions, 5137 flow [2023-08-26 19:52:06,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 97.72222222222223) internal successors, (1759), 18 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:06,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:06,311 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:06,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 19:52:06,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:52:06,517 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:52:06,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:06,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1493974491, now seen corresponding path program 1 times [2023-08-26 19:52:06,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:06,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070097662] [2023-08-26 19:52:06,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:06,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:06,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:06,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070097662] [2023-08-26 19:52:06,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070097662] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:52:06,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354452620] [2023-08-26 19:52:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:06,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:52:06,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:52:06,896 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:52:06,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 19:52:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:06,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 19:52:06,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:52:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:07,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:52:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:07,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354452620] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:52:07,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:52:07,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-26 19:52:07,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203865356] [2023-08-26 19:52:07,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:52:07,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 19:52:07,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:07,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 19:52:07,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-08-26 19:52:07,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 230 [2023-08-26 19:52:07,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 315 transitions, 5137 flow. Second operand has 19 states, 19 states have (on average 95.94736842105263) internal successors, (1823), 19 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:07,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:07,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 230 [2023-08-26 19:52:07,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:10,119 INFO L124 PetriNetUnfolderBase]: 2868/4885 cut-off events. [2023-08-26 19:52:10,119 INFO L125 PetriNetUnfolderBase]: For 73043/73043 co-relation queries the response was YES. [2023-08-26 19:52:10,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34866 conditions, 4885 events. 2868/4885 cut-off events. For 73043/73043 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 29408 event pairs, 37 based on Foata normal form. 122/5007 useless extension candidates. Maximal degree in co-relation 34818. Up to 1701 conditions per place. [2023-08-26 19:52:10,189 INFO L140 encePairwiseOnDemand]: 223/230 looper letters, 300 selfloop transitions, 279 changer transitions 285/864 dead transitions. [2023-08-26 19:52:10,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 864 transitions, 13861 flow [2023-08-26 19:52:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-26 19:52:10,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-26 19:52:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3937 transitions. [2023-08-26 19:52:10,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43890746934225194 [2023-08-26 19:52:10,199 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3937 transitions. [2023-08-26 19:52:10,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3937 transitions. [2023-08-26 19:52:10,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:10,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3937 transitions. [2023-08-26 19:52:10,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 100.94871794871794) internal successors, (3937), 39 states have internal predecessors, (3937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:10,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 230.0) internal successors, (9200), 40 states have internal predecessors, (9200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:10,219 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 230.0) internal successors, (9200), 40 states have internal predecessors, (9200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:10,219 INFO L175 Difference]: Start difference. First operand has 162 places, 315 transitions, 5137 flow. Second operand 39 states and 3937 transitions. [2023-08-26 19:52:10,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 864 transitions, 13861 flow [2023-08-26 19:52:10,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 864 transitions, 12309 flow, removed 742 selfloop flow, removed 19 redundant places. [2023-08-26 19:52:10,746 INFO L231 Difference]: Finished difference. Result has 174 places, 405 transitions, 6381 flow [2023-08-26 19:52:10,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=4234, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=6381, PETRI_PLACES=174, PETRI_TRANSITIONS=405} [2023-08-26 19:52:10,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2023-08-26 19:52:10,747 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 405 transitions, 6381 flow [2023-08-26 19:52:10,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 95.94736842105263) internal successors, (1823), 19 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:10,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:10,748 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:10,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 19:52:10,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 19:52:10,962 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:52:10,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:10,962 INFO L85 PathProgramCache]: Analyzing trace with hash -409873420, now seen corresponding path program 2 times [2023-08-26 19:52:10,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:10,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585084010] [2023-08-26 19:52:10,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:10,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:11,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:11,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585084010] [2023-08-26 19:52:11,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585084010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:52:11,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358983916] [2023-08-26 19:52:11,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:52:11,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:52:11,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:52:11,361 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:52:11,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 19:52:11,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:52:11,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:52:11,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 19:52:11,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:52:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:11,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:52:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:12,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358983916] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:52:12,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:52:12,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-26 19:52:12,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260639427] [2023-08-26 19:52:12,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:52:12,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 19:52:12,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:12,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 19:52:12,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-08-26 19:52:12,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 230 [2023-08-26 19:52:12,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 405 transitions, 6381 flow. Second operand has 19 states, 19 states have (on average 94.36842105263158) internal successors, (1793), 19 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:12,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:12,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 230 [2023-08-26 19:52:12,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:14,800 INFO L124 PetriNetUnfolderBase]: 3390/5701 cut-off events. [2023-08-26 19:52:14,801 INFO L125 PetriNetUnfolderBase]: For 66591/66591 co-relation queries the response was YES. [2023-08-26 19:52:14,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40176 conditions, 5701 events. 3390/5701 cut-off events. For 66591/66591 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 34071 event pairs, 63 based on Foata normal form. 174/5875 useless extension candidates. Maximal degree in co-relation 40129. Up to 1981 conditions per place. [2023-08-26 19:52:14,851 INFO L140 encePairwiseOnDemand]: 221/230 looper letters, 424 selfloop transitions, 320 changer transitions 207/951 dead transitions. [2023-08-26 19:52:14,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 951 transitions, 15830 flow [2023-08-26 19:52:14,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-26 19:52:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-26 19:52:14,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4516 transitions. [2023-08-26 19:52:14,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42684310018903593 [2023-08-26 19:52:14,858 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4516 transitions. [2023-08-26 19:52:14,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4516 transitions. [2023-08-26 19:52:14,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:14,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4516 transitions. [2023-08-26 19:52:14,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 98.17391304347827) internal successors, (4516), 46 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:14,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 230.0) internal successors, (10810), 47 states have internal predecessors, (10810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:14,878 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 230.0) internal successors, (10810), 47 states have internal predecessors, (10810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:14,878 INFO L175 Difference]: Start difference. First operand has 174 places, 405 transitions, 6381 flow. Second operand 46 states and 4516 transitions. [2023-08-26 19:52:14,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 951 transitions, 15830 flow [2023-08-26 19:52:15,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 951 transitions, 15103 flow, removed 265 selfloop flow, removed 23 redundant places. [2023-08-26 19:52:15,487 INFO L231 Difference]: Finished difference. Result has 201 places, 535 transitions, 9164 flow [2023-08-26 19:52:15,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=5885, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=9164, PETRI_PLACES=201, PETRI_TRANSITIONS=535} [2023-08-26 19:52:15,488 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2023-08-26 19:52:15,488 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 535 transitions, 9164 flow [2023-08-26 19:52:15,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 94.36842105263158) internal successors, (1793), 19 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:15,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:15,489 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:15,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 19:52:15,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:52:15,694 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:52:15,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:15,694 INFO L85 PathProgramCache]: Analyzing trace with hash 25267575, now seen corresponding path program 2 times [2023-08-26 19:52:15,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:15,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898309902] [2023-08-26 19:52:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:15,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:16,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:16,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898309902] [2023-08-26 19:52:16,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898309902] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:52:16,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838223903] [2023-08-26 19:52:16,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:52:16,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:52:16,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:52:16,017 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:52:16,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 19:52:16,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:52:16,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:52:16,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 19:52:16,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:52:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:16,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:52:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:16,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838223903] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:52:16,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:52:16,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-26 19:52:16,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002184475] [2023-08-26 19:52:16,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:52:16,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 19:52:16,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:16,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 19:52:16,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-08-26 19:52:16,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 230 [2023-08-26 19:52:16,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 535 transitions, 9164 flow. Second operand has 18 states, 18 states have (on average 97.66666666666667) internal successors, (1758), 18 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:16,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:16,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 230 [2023-08-26 19:52:16,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:19,013 INFO L124 PetriNetUnfolderBase]: 4101/6944 cut-off events. [2023-08-26 19:52:19,013 INFO L125 PetriNetUnfolderBase]: For 125294/125294 co-relation queries the response was YES. [2023-08-26 19:52:19,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53238 conditions, 6944 events. 4101/6944 cut-off events. For 125294/125294 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 43009 event pairs, 65 based on Foata normal form. 170/7114 useless extension candidates. Maximal degree in co-relation 53177. Up to 2365 conditions per place. [2023-08-26 19:52:19,096 INFO L140 encePairwiseOnDemand]: 223/230 looper letters, 412 selfloop transitions, 275 changer transitions 392/1079 dead transitions. [2023-08-26 19:52:19,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 1079 transitions, 20139 flow [2023-08-26 19:52:19,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-26 19:52:19,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-26 19:52:19,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3617 transitions. [2023-08-26 19:52:19,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4493167701863354 [2023-08-26 19:52:19,101 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3617 transitions. [2023-08-26 19:52:19,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3617 transitions. [2023-08-26 19:52:19,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:19,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3617 transitions. [2023-08-26 19:52:19,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 103.34285714285714) internal successors, (3617), 35 states have internal predecessors, (3617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:19,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 230.0) internal successors, (8280), 36 states have internal predecessors, (8280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:19,117 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 230.0) internal successors, (8280), 36 states have internal predecessors, (8280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:19,117 INFO L175 Difference]: Start difference. First operand has 201 places, 535 transitions, 9164 flow. Second operand 35 states and 3617 transitions. [2023-08-26 19:52:19,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 1079 transitions, 20139 flow [2023-08-26 19:52:20,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 1079 transitions, 18210 flow, removed 845 selfloop flow, removed 24 redundant places. [2023-08-26 19:52:20,095 INFO L231 Difference]: Finished difference. Result has 205 places, 548 transitions, 9323 flow [2023-08-26 19:52:20,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=8354, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9323, PETRI_PLACES=205, PETRI_TRANSITIONS=548} [2023-08-26 19:52:20,096 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2023-08-26 19:52:20,096 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 548 transitions, 9323 flow [2023-08-26 19:52:20,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 97.66666666666667) internal successors, (1758), 18 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:20,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:20,097 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:20,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-26 19:52:20,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:52:20,302 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:52:20,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:20,302 INFO L85 PathProgramCache]: Analyzing trace with hash -117461631, now seen corresponding path program 3 times [2023-08-26 19:52:20,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:20,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365463145] [2023-08-26 19:52:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:20,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:20,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:20,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365463145] [2023-08-26 19:52:20,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365463145] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:52:20,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000264852] [2023-08-26 19:52:20,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 19:52:20,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:52:20,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:52:20,925 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:52:20,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 19:52:21,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-26 19:52:21,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:52:21,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 19:52:21,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:52:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:21,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:52:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:22,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000264852] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:52:22,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:52:22,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-26 19:52:22,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407333377] [2023-08-26 19:52:22,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:52:22,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-26 19:52:22,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:22,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-26 19:52:22,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2023-08-26 19:52:22,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 230 [2023-08-26 19:52:22,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 548 transitions, 9323 flow. Second operand has 25 states, 25 states have (on average 93.88) internal successors, (2347), 25 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:22,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:22,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 230 [2023-08-26 19:52:22,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:29,224 INFO L124 PetriNetUnfolderBase]: 5610/9277 cut-off events. [2023-08-26 19:52:29,225 INFO L125 PetriNetUnfolderBase]: For 153533/153533 co-relation queries the response was YES. [2023-08-26 19:52:29,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69939 conditions, 9277 events. 5610/9277 cut-off events. For 153533/153533 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 58579 event pairs, 77 based on Foata normal form. 394/9671 useless extension candidates. Maximal degree in co-relation 69879. Up to 3437 conditions per place. [2023-08-26 19:52:29,313 INFO L140 encePairwiseOnDemand]: 221/230 looper letters, 538 selfloop transitions, 519 changer transitions 543/1600 dead transitions. [2023-08-26 19:52:29,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 1600 transitions, 28837 flow [2023-08-26 19:52:29,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-08-26 19:52:29,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2023-08-26 19:52:29,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 9834 transitions. [2023-08-26 19:52:29,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423331898407232 [2023-08-26 19:52:29,326 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 9834 transitions. [2023-08-26 19:52:29,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 9834 transitions. [2023-08-26 19:52:29,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:29,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 9834 transitions. [2023-08-26 19:52:29,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 97.36633663366337) internal successors, (9834), 101 states have internal predecessors, (9834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:29,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 230.0) internal successors, (23460), 102 states have internal predecessors, (23460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:29,374 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 230.0) internal successors, (23460), 102 states have internal predecessors, (23460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:29,374 INFO L175 Difference]: Start difference. First operand has 205 places, 548 transitions, 9323 flow. Second operand 101 states and 9834 transitions. [2023-08-26 19:52:29,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 1600 transitions, 28837 flow [2023-08-26 19:52:30,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 1600 transitions, 27953 flow, removed 401 selfloop flow, removed 19 redundant places. [2023-08-26 19:52:30,825 INFO L231 Difference]: Finished difference. Result has 324 places, 723 transitions, 13523 flow [2023-08-26 19:52:30,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=8467, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=13523, PETRI_PLACES=324, PETRI_TRANSITIONS=723} [2023-08-26 19:52:30,826 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2023-08-26 19:52:30,826 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 723 transitions, 13523 flow [2023-08-26 19:52:30,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 93.88) internal successors, (2347), 25 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:30,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:30,827 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:30,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-26 19:52:31,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:52:31,033 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:52:31,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:31,033 INFO L85 PathProgramCache]: Analyzing trace with hash 891626255, now seen corresponding path program 4 times [2023-08-26 19:52:31,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:31,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159957357] [2023-08-26 19:52:31,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:31,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:31,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:31,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159957357] [2023-08-26 19:52:31,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159957357] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:52:31,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741635617] [2023-08-26 19:52:31,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 19:52:31,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:52:31,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:52:31,565 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:52:31,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 19:52:31,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 19:52:31,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:52:31,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 19:52:31,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:52:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:31,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:52:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:32,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741635617] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:52:32,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:52:32,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-26 19:52:32,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211258302] [2023-08-26 19:52:32,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:52:32,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-26 19:52:32,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:32,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-26 19:52:32,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2023-08-26 19:52:32,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 230 [2023-08-26 19:52:32,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 723 transitions, 13523 flow. Second operand has 25 states, 25 states have (on average 95.72) internal successors, (2393), 25 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:32,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:32,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 230 [2023-08-26 19:52:32,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:39,466 INFO L124 PetriNetUnfolderBase]: 7125/11792 cut-off events. [2023-08-26 19:52:39,466 INFO L125 PetriNetUnfolderBase]: For 490483/490483 co-relation queries the response was YES. [2023-08-26 19:52:39,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107633 conditions, 11792 events. 7125/11792 cut-off events. For 490483/490483 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 78216 event pairs, 91 based on Foata normal form. 188/11980 useless extension candidates. Maximal degree in co-relation 107526. Up to 4381 conditions per place. [2023-08-26 19:52:39,617 INFO L140 encePairwiseOnDemand]: 223/230 looper letters, 704 selfloop transitions, 709 changer transitions 276/1689 dead transitions. [2023-08-26 19:52:39,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 1689 transitions, 36765 flow [2023-08-26 19:52:39,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-08-26 19:52:39,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-08-26 19:52:39,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 7030 transitions. [2023-08-26 19:52:39,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4366459627329193 [2023-08-26 19:52:39,626 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 7030 transitions. [2023-08-26 19:52:39,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 7030 transitions. [2023-08-26 19:52:39,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:39,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 7030 transitions. [2023-08-26 19:52:39,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 100.42857142857143) internal successors, (7030), 70 states have internal predecessors, (7030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:39,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 230.0) internal successors, (16330), 71 states have internal predecessors, (16330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:39,656 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 230.0) internal successors, (16330), 71 states have internal predecessors, (16330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:39,656 INFO L175 Difference]: Start difference. First operand has 324 places, 723 transitions, 13523 flow. Second operand 70 states and 7030 transitions. [2023-08-26 19:52:39,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 1689 transitions, 36765 flow [2023-08-26 19:52:43,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 1689 transitions, 29303 flow, removed 3419 selfloop flow, removed 71 redundant places. [2023-08-26 19:52:43,101 INFO L231 Difference]: Finished difference. Result has 276 places, 1029 transitions, 19274 flow [2023-08-26 19:52:43,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=11425, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=19274, PETRI_PLACES=276, PETRI_TRANSITIONS=1029} [2023-08-26 19:52:43,102 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2023-08-26 19:52:43,102 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 1029 transitions, 19274 flow [2023-08-26 19:52:43,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 95.72) internal successors, (2393), 25 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:43,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:43,103 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:43,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 19:52:43,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-26 19:52:43,304 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:52:43,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:43,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1089272196, now seen corresponding path program 5 times [2023-08-26 19:52:43,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:43,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404736871] [2023-08-26 19:52:43,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:43,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:43,996 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:43,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:43,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404736871] [2023-08-26 19:52:43,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404736871] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:52:43,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100255941] [2023-08-26 19:52:43,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 19:52:43,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:52:43,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:52:43,998 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:52:44,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 19:52:44,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-26 19:52:44,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:52:44,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 19:52:44,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:52:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:44,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:52:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:45,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100255941] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:52:45,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:52:45,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-26 19:52:45,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749709131] [2023-08-26 19:52:45,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:52:45,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 19:52:45,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:45,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 19:52:45,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2023-08-26 19:52:45,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 230 [2023-08-26 19:52:45,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 1029 transitions, 19274 flow. Second operand has 24 states, 24 states have (on average 95.5) internal successors, (2292), 24 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:45,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:45,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 230 [2023-08-26 19:52:45,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:55,072 INFO L124 PetriNetUnfolderBase]: 11496/19087 cut-off events. [2023-08-26 19:52:55,072 INFO L125 PetriNetUnfolderBase]: For 330785/330785 co-relation queries the response was YES. [2023-08-26 19:52:55,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154001 conditions, 19087 events. 11496/19087 cut-off events. For 330785/330785 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 137742 event pairs, 145 based on Foata normal form. 458/19545 useless extension candidates. Maximal degree in co-relation 153933. Up to 6797 conditions per place. [2023-08-26 19:52:55,301 INFO L140 encePairwiseOnDemand]: 223/230 looper letters, 892 selfloop transitions, 892 changer transitions 1035/2819 dead transitions. [2023-08-26 19:52:55,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 2819 transitions, 57135 flow [2023-08-26 19:52:55,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-08-26 19:52:55,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2023-08-26 19:52:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 8901 transitions. [2023-08-26 19:52:55,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43977272727272726 [2023-08-26 19:52:55,312 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 8901 transitions. [2023-08-26 19:52:55,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 8901 transitions. [2023-08-26 19:52:55,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:55,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 8901 transitions. [2023-08-26 19:52:55,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 101.14772727272727) internal successors, (8901), 88 states have internal predecessors, (8901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:55,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 230.0) internal successors, (20470), 89 states have internal predecessors, (20470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:55,343 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 230.0) internal successors, (20470), 89 states have internal predecessors, (20470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:55,343 INFO L175 Difference]: Start difference. First operand has 276 places, 1029 transitions, 19274 flow. Second operand 88 states and 8901 transitions. [2023-08-26 19:52:55,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 2819 transitions, 57135 flow [2023-08-26 19:53:02,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 2819 transitions, 51673 flow, removed 2388 selfloop flow, removed 27 redundant places. [2023-08-26 19:53:02,926 INFO L231 Difference]: Finished difference. Result has 351 places, 1371 transitions, 26817 flow [2023-08-26 19:53:02,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=17700, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1029, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=566, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=26817, PETRI_PLACES=351, PETRI_TRANSITIONS=1371} [2023-08-26 19:53:02,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2023-08-26 19:53:02,928 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1371 transitions, 26817 flow [2023-08-26 19:53:02,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 95.5) internal successors, (2292), 24 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:02,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:02,929 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:02,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-26 19:53:03,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:53:03,138 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:53:03,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:03,138 INFO L85 PathProgramCache]: Analyzing trace with hash 655354634, now seen corresponding path program 6 times [2023-08-26 19:53:03,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:03,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198560518] [2023-08-26 19:53:03,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:03,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:53:03,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:03,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198560518] [2023-08-26 19:53:03,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198560518] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:53:03,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720580717] [2023-08-26 19:53:03,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 19:53:03,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:53:03,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:53:03,724 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:53:03,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-26 19:53:03,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-26 19:53:03,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:53:03,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 19:53:03,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:53:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:53:04,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:53:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:53:05,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720580717] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:53:05,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:53:05,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-26 19:53:05,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417805743] [2023-08-26 19:53:05,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:53:05,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-26 19:53:05,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:05,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-26 19:53:05,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2023-08-26 19:53:05,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 230 [2023-08-26 19:53:05,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1371 transitions, 26817 flow. Second operand has 25 states, 25 states have (on average 95.8) internal successors, (2395), 25 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:05,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:05,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 230 [2023-08-26 19:53:05,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:15,077 INFO L124 PetriNetUnfolderBase]: 12974/21667 cut-off events. [2023-08-26 19:53:15,077 INFO L125 PetriNetUnfolderBase]: For 546330/546330 co-relation queries the response was YES. [2023-08-26 19:53:15,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177444 conditions, 21667 events. 12974/21667 cut-off events. For 546330/546330 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 159753 event pairs, 263 based on Foata normal form. 250/21917 useless extension candidates. Maximal degree in co-relation 177353. Up to 8249 conditions per place. [2023-08-26 19:53:15,314 INFO L140 encePairwiseOnDemand]: 223/230 looper letters, 1233 selfloop transitions, 890 changer transitions 606/2729 dead transitions. [2023-08-26 19:53:15,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 2729 transitions, 56354 flow [2023-08-26 19:53:15,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-26 19:53:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-26 19:53:15,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 6378 transitions. [2023-08-26 19:53:15,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4401656314699793 [2023-08-26 19:53:15,321 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 6378 transitions. [2023-08-26 19:53:15,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 6378 transitions. [2023-08-26 19:53:15,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:15,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 6378 transitions. [2023-08-26 19:53:15,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 101.23809523809524) internal successors, (6378), 63 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:15,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 230.0) internal successors, (14720), 64 states have internal predecessors, (14720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:15,339 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 230.0) internal successors, (14720), 64 states have internal predecessors, (14720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:15,339 INFO L175 Difference]: Start difference. First operand has 351 places, 1371 transitions, 26817 flow. Second operand 63 states and 6378 transitions. [2023-08-26 19:53:15,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 2729 transitions, 56354 flow [2023-08-26 19:53:20,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 2729 transitions, 54274 flow, removed 979 selfloop flow, removed 41 redundant places. [2023-08-26 19:53:20,681 INFO L231 Difference]: Finished difference. Result has 361 places, 1790 transitions, 37424 flow [2023-08-26 19:53:20,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=25569, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=497, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=774, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=37424, PETRI_PLACES=361, PETRI_TRANSITIONS=1790} [2023-08-26 19:53:20,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2023-08-26 19:53:20,683 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 1790 transitions, 37424 flow [2023-08-26 19:53:20,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 95.8) internal successors, (2395), 25 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:20,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:20,683 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:20,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-26 19:53:20,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-26 19:53:20,889 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:53:20,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:20,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1304585106, now seen corresponding path program 7 times [2023-08-26 19:53:20,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:20,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824626322] [2023-08-26 19:53:20,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:20,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:53:21,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:21,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824626322] [2023-08-26 19:53:21,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824626322] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:53:21,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239480650] [2023-08-26 19:53:21,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 19:53:21,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:53:21,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:53:21,391 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:53:21,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-26 19:53:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:21,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 19:53:21,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:53:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:53:21,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:53:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:53:22,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239480650] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:53:22,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:53:22,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-26 19:53:22,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403293089] [2023-08-26 19:53:22,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:53:22,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-26 19:53:22,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:22,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-26 19:53:22,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-08-26 19:53:22,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 230 [2023-08-26 19:53:22,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 1790 transitions, 37424 flow. Second operand has 25 states, 25 states have (on average 95.72) internal successors, (2393), 25 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:22,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:22,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 230 [2023-08-26 19:53:22,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:34,901 INFO L124 PetriNetUnfolderBase]: 14125/23398 cut-off events. [2023-08-26 19:53:34,901 INFO L125 PetriNetUnfolderBase]: For 489870/489870 co-relation queries the response was YES. [2023-08-26 19:53:35,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193480 conditions, 23398 events. 14125/23398 cut-off events. For 489870/489870 co-relation queries the response was YES. Maximal size of possible extension queue 873. Compared 172081 event pairs, 249 based on Foata normal form. 252/23650 useless extension candidates. Maximal degree in co-relation 193388. Up to 9580 conditions per place. [2023-08-26 19:53:35,406 INFO L140 encePairwiseOnDemand]: 223/230 looper letters, 1392 selfloop transitions, 850 changer transitions 664/2906 dead transitions. [2023-08-26 19:53:35,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 2906 transitions, 62578 flow [2023-08-26 19:53:35,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-08-26 19:53:35,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-08-26 19:53:35,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 6576 transitions. [2023-08-26 19:53:35,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43986622073578596 [2023-08-26 19:53:35,414 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 6576 transitions. [2023-08-26 19:53:35,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 6576 transitions. [2023-08-26 19:53:35,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:35,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 6576 transitions. [2023-08-26 19:53:35,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 101.16923076923077) internal successors, (6576), 65 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:35,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 230.0) internal successors, (15180), 66 states have internal predecessors, (15180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:35,434 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 230.0) internal successors, (15180), 66 states have internal predecessors, (15180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:35,434 INFO L175 Difference]: Start difference. First operand has 361 places, 1790 transitions, 37424 flow. Second operand 65 states and 6576 transitions. [2023-08-26 19:53:35,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 2906 transitions, 62578 flow [2023-08-26 19:53:41,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 2906 transitions, 60990 flow, removed 742 selfloop flow, removed 28 redundant places. [2023-08-26 19:53:41,461 INFO L231 Difference]: Finished difference. Result has 394 places, 1942 transitions, 41892 flow [2023-08-26 19:53:41,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=35938, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=669, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1090, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=41892, PETRI_PLACES=394, PETRI_TRANSITIONS=1942} [2023-08-26 19:53:41,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2023-08-26 19:53:41,463 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 1942 transitions, 41892 flow [2023-08-26 19:53:41,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 95.72) internal successors, (2393), 25 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:41,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:41,463 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:41,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-26 19:53:41,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-26 19:53:41,669 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:53:41,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:41,669 INFO L85 PathProgramCache]: Analyzing trace with hash 417215942, now seen corresponding path program 8 times [2023-08-26 19:53:41,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:41,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632564774] [2023-08-26 19:53:41,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:41,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:53:42,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:42,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632564774] [2023-08-26 19:53:42,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632564774] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:53:42,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979146876] [2023-08-26 19:53:42,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:53:42,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:53:42,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:53:42,213 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:53:42,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-26 19:53:42,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:53:42,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:53:42,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 19:53:42,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:53:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:53:42,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:53:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:53:43,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979146876] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:53:43,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:53:43,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-26 19:53:43,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893138604] [2023-08-26 19:53:43,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:53:43,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 19:53:43,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:43,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 19:53:43,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2023-08-26 19:53:43,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 230 [2023-08-26 19:53:43,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1942 transitions, 41892 flow. Second operand has 24 states, 24 states have (on average 95.45833333333333) internal successors, (2291), 24 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:43,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:43,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 230 [2023-08-26 19:53:43,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:58,617 INFO L124 PetriNetUnfolderBase]: 17542/29175 cut-off events. [2023-08-26 19:53:58,617 INFO L125 PetriNetUnfolderBase]: For 780200/780200 co-relation queries the response was YES. [2023-08-26 19:53:59,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252059 conditions, 29175 events. 17542/29175 cut-off events. For 780200/780200 co-relation queries the response was YES. Maximal size of possible extension queue 1103. Compared 222823 event pairs, 253 based on Foata normal form. 476/29651 useless extension candidates. Maximal degree in co-relation 251962. Up to 10781 conditions per place. [2023-08-26 19:53:59,316 INFO L140 encePairwiseOnDemand]: 223/230 looper letters, 1355 selfloop transitions, 1297 changer transitions 993/3645 dead transitions. [2023-08-26 19:53:59,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 3645 transitions, 82927 flow [2023-08-26 19:53:59,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-26 19:53:59,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-26 19:53:59,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 7582 transitions. [2023-08-26 19:53:59,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.439536231884058 [2023-08-26 19:53:59,323 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 7582 transitions. [2023-08-26 19:53:59,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 7582 transitions. [2023-08-26 19:53:59,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:59,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 7582 transitions. [2023-08-26 19:53:59,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 101.09333333333333) internal successors, (7582), 75 states have internal predecessors, (7582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:59,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 230.0) internal successors, (17480), 76 states have internal predecessors, (17480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:59,347 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 230.0) internal successors, (17480), 76 states have internal predecessors, (17480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:59,347 INFO L175 Difference]: Start difference. First operand has 394 places, 1942 transitions, 41892 flow. Second operand 75 states and 7582 transitions. [2023-08-26 19:53:59,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 3645 transitions, 82927 flow [2023-08-26 19:54:09,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 3645 transitions, 77735 flow, removed 1550 selfloop flow, removed 36 redundant places. [2023-08-26 19:54:09,575 INFO L231 Difference]: Finished difference. Result has 430 places, 2255 transitions, 50997 flow [2023-08-26 19:54:09,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=39598, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1942, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=949, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=896, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=50997, PETRI_PLACES=430, PETRI_TRANSITIONS=2255} [2023-08-26 19:54:09,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2023-08-26 19:54:09,577 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 2255 transitions, 50997 flow [2023-08-26 19:54:09,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 95.45833333333333) internal successors, (2291), 24 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:09,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:54:09,577 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:54:09,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-26 19:54:09,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-26 19:54:09,778 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:54:09,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:54:09,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1425830008, now seen corresponding path program 9 times [2023-08-26 19:54:09,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:54:09,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454806343] [2023-08-26 19:54:09,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:54:09,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:54:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:54:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:54:10,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:54:10,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454806343] [2023-08-26 19:54:10,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454806343] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:54:10,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756536223] [2023-08-26 19:54:10,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 19:54:10,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:54:10,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:54:10,374 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:54:10,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-26 19:54:10,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-26 19:54:10,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:54:10,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-26 19:54:10,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:54:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:54:10,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:54:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:54:12,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756536223] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:54:12,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:54:12,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2023-08-26 19:54:12,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429763360] [2023-08-26 19:54:12,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:54:12,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-26 19:54:12,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:54:12,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-26 19:54:12,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2023-08-26 19:54:12,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 230 [2023-08-26 19:54:12,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 2255 transitions, 50997 flow. Second operand has 25 states, 25 states have (on average 93.72) internal successors, (2343), 25 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:12,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:54:12,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 230 [2023-08-26 19:54:12,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:54:32,567 INFO L124 PetriNetUnfolderBase]: 18129/30094 cut-off events. [2023-08-26 19:54:32,567 INFO L125 PetriNetUnfolderBase]: For 741673/741673 co-relation queries the response was YES. [2023-08-26 19:54:33,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261652 conditions, 30094 events. 18129/30094 cut-off events. For 741673/741673 co-relation queries the response was YES. Maximal size of possible extension queue 1159. Compared 229196 event pairs, 363 based on Foata normal form. 364/30458 useless extension candidates. Maximal degree in co-relation 261543. Up to 12180 conditions per place. [2023-08-26 19:54:33,473 INFO L140 encePairwiseOnDemand]: 221/230 looper letters, 1815 selfloop transitions, 1203 changer transitions 441/3459 dead transitions. [2023-08-26 19:54:33,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 3459 transitions, 81060 flow [2023-08-26 19:54:33,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-08-26 19:54:33,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-08-26 19:54:33,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 9361 transitions. [2023-08-26 19:54:33,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4239583333333333 [2023-08-26 19:54:33,483 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 9361 transitions. [2023-08-26 19:54:33,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 9361 transitions. [2023-08-26 19:54:33,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:54:33,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 9361 transitions. [2023-08-26 19:54:33,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 97.51041666666667) internal successors, (9361), 96 states have internal predecessors, (9361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:33,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 230.0) internal successors, (22310), 97 states have internal predecessors, (22310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:33,516 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 230.0) internal successors, (22310), 97 states have internal predecessors, (22310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:33,516 INFO L175 Difference]: Start difference. First operand has 430 places, 2255 transitions, 50997 flow. Second operand 96 states and 9361 transitions. [2023-08-26 19:54:33,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 3459 transitions, 81060 flow [2023-08-26 19:54:42,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 3459 transitions, 77656 flow, removed 1246 selfloop flow, removed 39 redundant places. [2023-08-26 19:54:42,113 INFO L231 Difference]: Finished difference. Result has 521 places, 2635 transitions, 61421 flow [2023-08-26 19:54:42,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=48032, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=839, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=61421, PETRI_PLACES=521, PETRI_TRANSITIONS=2635} [2023-08-26 19:54:42,116 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 479 predicate places. [2023-08-26 19:54:42,116 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 2635 transitions, 61421 flow [2023-08-26 19:54:42,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 93.72) internal successors, (2343), 25 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:42,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:54:42,117 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:54:42,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-26 19:54:42,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-26 19:54:42,322 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:54:42,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:54:42,322 INFO L85 PathProgramCache]: Analyzing trace with hash 280881379, now seen corresponding path program 10 times [2023-08-26 19:54:42,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:54:42,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171292739] [2023-08-26 19:54:42,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:54:42,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:54:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:54:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:54:42,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:54:42,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171292739] [2023-08-26 19:54:42,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171292739] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:54:42,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782341867] [2023-08-26 19:54:42,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 19:54:42,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:54:42,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:54:42,970 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:54:42,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-26 19:54:43,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 19:54:43,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:54:43,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-26 19:54:43,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:54:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:54:43,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:54:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:54:44,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782341867] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:54:44,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:54:44,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-08-26 19:54:44,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454274439] [2023-08-26 19:54:44,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:54:44,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-26 19:54:44,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:54:44,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-26 19:54:44,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2023-08-26 19:54:44,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 230 [2023-08-26 19:54:44,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 2635 transitions, 61421 flow. Second operand has 26 states, 26 states have (on average 95.5) internal successors, (2483), 26 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:44,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:54:44,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 230 [2023-08-26 19:54:44,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:55:10,797 INFO L124 PetriNetUnfolderBase]: 21299/35528 cut-off events. [2023-08-26 19:55:10,797 INFO L125 PetriNetUnfolderBase]: For 1567660/1567660 co-relation queries the response was YES. [2023-08-26 19:55:12,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344667 conditions, 35528 events. 21299/35528 cut-off events. For 1567660/1567660 co-relation queries the response was YES. Maximal size of possible extension queue 1308. Compared 279568 event pairs, 401 based on Foata normal form. 406/35934 useless extension candidates. Maximal degree in co-relation 344518. Up to 13531 conditions per place. [2023-08-26 19:55:12,258 INFO L140 encePairwiseOnDemand]: 223/230 looper letters, 1947 selfloop transitions, 1368 changer transitions 852/4167 dead transitions. [2023-08-26 19:55:12,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 4167 transitions, 104391 flow [2023-08-26 19:55:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-08-26 19:55:12,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2023-08-26 19:55:12,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 7506 transitions. [2023-08-26 19:55:12,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4410105757931845 [2023-08-26 19:55:12,264 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 7506 transitions. [2023-08-26 19:55:12,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 7506 transitions. [2023-08-26 19:55:12,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:55:12,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 7506 transitions. [2023-08-26 19:55:12,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 101.43243243243244) internal successors, (7506), 74 states have internal predecessors, (7506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:55:12,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 230.0) internal successors, (17250), 75 states have internal predecessors, (17250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:55:12,277 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 230.0) internal successors, (17250), 75 states have internal predecessors, (17250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:55:12,278 INFO L175 Difference]: Start difference. First operand has 521 places, 2635 transitions, 61421 flow. Second operand 74 states and 7506 transitions. [2023-08-26 19:55:12,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 4167 transitions, 104391 flow [2023-08-26 19:55:34,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 4167 transitions, 99070 flow, removed 2592 selfloop flow, removed 56 redundant places. [2023-08-26 19:55:34,900 INFO L231 Difference]: Finished difference. Result has 509 places, 2924 transitions, 71380 flow [2023-08-26 19:55:34,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=59696, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1059, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=71380, PETRI_PLACES=509, PETRI_TRANSITIONS=2924} [2023-08-26 19:55:34,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 467 predicate places. [2023-08-26 19:55:34,903 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 2924 transitions, 71380 flow [2023-08-26 19:55:34,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 95.5) internal successors, (2483), 26 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:55:34,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:55:34,903 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:55:34,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-26 19:55:35,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:55:35,108 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:55:35,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:55:35,109 INFO L85 PathProgramCache]: Analyzing trace with hash 768086343, now seen corresponding path program 11 times [2023-08-26 19:55:35,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:55:35,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440341252] [2023-08-26 19:55:35,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:55:35,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:55:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:55:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:55:35,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:55:35,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440341252] [2023-08-26 19:55:35,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440341252] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:55:35,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875748749] [2023-08-26 19:55:35,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 19:55:35,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:55:35,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:55:35,672 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:55:35,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-26 19:55:35,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-26 19:55:35,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:55:35,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-26 19:55:35,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:55:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:55:36,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:55:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:55:37,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875748749] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:55:37,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:55:37,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-08-26 19:55:37,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208908928] [2023-08-26 19:55:37,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:55:37,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-26 19:55:37,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:55:37,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-26 19:55:37,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2023-08-26 19:55:37,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 230 [2023-08-26 19:55:37,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 2924 transitions, 71380 flow. Second operand has 26 states, 26 states have (on average 95.84615384615384) internal successors, (2492), 26 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:55:37,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:55:37,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 230 [2023-08-26 19:55:37,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:56:06,691 INFO L124 PetriNetUnfolderBase]: 24024/40147 cut-off events. [2023-08-26 19:56:06,691 INFO L125 PetriNetUnfolderBase]: For 1429568/1429568 co-relation queries the response was YES. [2023-08-26 19:56:07,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378278 conditions, 40147 events. 24024/40147 cut-off events. For 1429568/1429568 co-relation queries the response was YES. Maximal size of possible extension queue 1436. Compared 322984 event pairs, 529 based on Foata normal form. 462/40609 useless extension candidates. Maximal degree in co-relation 378151. Up to 16332 conditions per place. [2023-08-26 19:56:08,011 INFO L140 encePairwiseOnDemand]: 223/230 looper letters, 2109 selfloop transitions, 1545 changer transitions 978/4632 dead transitions. [2023-08-26 19:56:08,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 4632 transitions, 117605 flow [2023-08-26 19:56:08,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-26 19:56:08,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-26 19:56:08,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 7701 transitions. [2023-08-26 19:56:08,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4405606407322655 [2023-08-26 19:56:08,015 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 7701 transitions. [2023-08-26 19:56:08,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 7701 transitions. [2023-08-26 19:56:08,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:56:08,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 7701 transitions. [2023-08-26 19:56:08,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 101.32894736842105) internal successors, (7701), 76 states have internal predecessors, (7701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:56:08,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 230.0) internal successors, (17710), 77 states have internal predecessors, (17710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:56:08,030 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 230.0) internal successors, (17710), 77 states have internal predecessors, (17710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:56:08,030 INFO L175 Difference]: Start difference. First operand has 509 places, 2924 transitions, 71380 flow. Second operand 76 states and 7701 transitions. [2023-08-26 19:56:08,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 4632 transitions, 117605 flow [2023-08-26 19:56:25,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 4632 transitions, 114731 flow, removed 1359 selfloop flow, removed 36 redundant places. [2023-08-26 19:56:26,049 INFO L231 Difference]: Finished difference. Result has 555 places, 3238 transitions, 83965 flow [2023-08-26 19:56:26,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=69430, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1083, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=83965, PETRI_PLACES=555, PETRI_TRANSITIONS=3238} [2023-08-26 19:56:26,051 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 513 predicate places. [2023-08-26 19:56:26,052 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 3238 transitions, 83965 flow [2023-08-26 19:56:26,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 95.84615384615384) internal successors, (2492), 26 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:56:26,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:56:26,052 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:56:26,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-26 19:56:26,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-26 19:56:26,257 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:56:26,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:56:26,257 INFO L85 PathProgramCache]: Analyzing trace with hash 591380916, now seen corresponding path program 6 times [2023-08-26 19:56:26,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:56:26,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109592553] [2023-08-26 19:56:26,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:56:26,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:56:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:56:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:56:27,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:56:27,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109592553] [2023-08-26 19:56:27,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109592553] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:56:27,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004347321] [2023-08-26 19:56:27,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 19:56:27,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:56:27,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:56:27,165 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:56:27,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-26 19:56:27,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-08-26 19:56:27,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:56:27,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-26 19:56:27,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:56:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:56:28,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:56:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:56:28,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004347321] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:56:28,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:56:28,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-26 19:56:28,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071751282] [2023-08-26 19:56:28,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:56:28,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-26 19:56:28,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:56:28,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-26 19:56:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2023-08-26 19:56:28,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 230 [2023-08-26 19:56:28,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 3238 transitions, 83965 flow. Second operand has 30 states, 30 states have (on average 95.53333333333333) internal successors, (2866), 30 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:56:28,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:56:28,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 230 [2023-08-26 19:56:28,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:57:03,434 INFO L124 PetriNetUnfolderBase]: 25115/41950 cut-off events. [2023-08-26 19:57:03,435 INFO L125 PetriNetUnfolderBase]: For 1469374/1469374 co-relation queries the response was YES. [2023-08-26 19:57:04,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407659 conditions, 41950 events. 25115/41950 cut-off events. For 1469374/1469374 co-relation queries the response was YES. Maximal size of possible extension queue 1489. Compared 337097 event pairs, 809 based on Foata normal form. 416/42366 useless extension candidates. Maximal degree in co-relation 407523. Up to 22499 conditions per place. [2023-08-26 19:57:05,172 INFO L140 encePairwiseOnDemand]: 220/230 looper letters, 2870 selfloop transitions, 1136 changer transitions 608/4614 dead transitions. [2023-08-26 19:57:05,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 4614 transitions, 124114 flow [2023-08-26 19:57:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-08-26 19:57:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2023-08-26 19:57:05,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 10473 transitions. [2023-08-26 19:57:05,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336645962732919 [2023-08-26 19:57:05,180 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 10473 transitions. [2023-08-26 19:57:05,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 10473 transitions. [2023-08-26 19:57:05,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:57:05,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 10473 transitions. [2023-08-26 19:57:05,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 99.74285714285715) internal successors, (10473), 105 states have internal predecessors, (10473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:57:05,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 230.0) internal successors, (24380), 106 states have internal predecessors, (24380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:57:05,209 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 230.0) internal successors, (24380), 106 states have internal predecessors, (24380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:57:05,209 INFO L175 Difference]: Start difference. First operand has 555 places, 3238 transitions, 83965 flow. Second operand 105 states and 10473 transitions. [2023-08-26 19:57:05,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 4614 transitions, 124114 flow [2023-08-26 19:57:22,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 591 places, 4614 transitions, 120879 flow, removed 1363 selfloop flow, removed 32 redundant places. [2023-08-26 19:57:22,715 INFO L231 Difference]: Finished difference. Result has 660 places, 3643 transitions, 95976 flow [2023-08-26 19:57:22,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=81072, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=737, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=95976, PETRI_PLACES=660, PETRI_TRANSITIONS=3643} [2023-08-26 19:57:22,718 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 618 predicate places. [2023-08-26 19:57:22,718 INFO L495 AbstractCegarLoop]: Abstraction has has 660 places, 3643 transitions, 95976 flow [2023-08-26 19:57:22,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 95.53333333333333) internal successors, (2866), 30 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:57:22,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:57:22,719 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:57:22,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-26 19:57:22,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:57:22,919 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:57:22,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:57:22,920 INFO L85 PathProgramCache]: Analyzing trace with hash -553122192, now seen corresponding path program 12 times [2023-08-26 19:57:22,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:57:22,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964431276] [2023-08-26 19:57:22,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:57:22,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:57:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:57:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:57:23,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:57:23,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964431276] [2023-08-26 19:57:23,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964431276] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:57:23,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533926979] [2023-08-26 19:57:23,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 19:57:23,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:57:23,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:57:23,735 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:57:23,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-26 19:57:24,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-26 19:57:24,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:57:24,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-26 19:57:24,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:57:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:57:24,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:57:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:57:26,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533926979] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:57:26,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:57:26,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-26 19:57:26,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366370302] [2023-08-26 19:57:26,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:57:26,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-26 19:57:26,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:57:26,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-26 19:57:26,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2023-08-26 19:57:26,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 230 [2023-08-26 19:57:26,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 660 places, 3643 transitions, 95976 flow. Second operand has 30 states, 30 states have (on average 93.53333333333333) internal successors, (2806), 30 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:57:26,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:57:26,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 230 [2023-08-26 19:57:26,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:58:24,806 INFO L124 PetriNetUnfolderBase]: 30455/50888 cut-off events. [2023-08-26 19:58:24,806 INFO L125 PetriNetUnfolderBase]: For 3321726/3321726 co-relation queries the response was YES. [2023-08-26 19:58:27,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559678 conditions, 50888 events. 30455/50888 cut-off events. For 3321726/3321726 co-relation queries the response was YES. Maximal size of possible extension queue 1880. Compared 421495 event pairs, 697 based on Foata normal form. 742/51630 useless extension candidates. Maximal degree in co-relation 559492. Up to 19616 conditions per place. [2023-08-26 19:58:27,457 INFO L140 encePairwiseOnDemand]: 221/230 looper letters, 3035 selfloop transitions, 2048 changer transitions 992/6075 dead transitions. [2023-08-26 19:58:27,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 788 places, 6075 transitions, 170070 flow [2023-08-26 19:58:27,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2023-08-26 19:58:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2023-08-26 19:58:27,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 18604 transitions. [2023-08-26 19:58:27,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42349191896198496 [2023-08-26 19:58:27,468 INFO L72 ComplementDD]: Start complementDD. Operand 191 states and 18604 transitions. [2023-08-26 19:58:27,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 191 states and 18604 transitions. [2023-08-26 19:58:27,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:58:27,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 191 states and 18604 transitions. [2023-08-26 19:58:27,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 192 states, 191 states have (on average 97.40314136125654) internal successors, (18604), 191 states have internal predecessors, (18604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:58:27,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 192 states, 192 states have (on average 230.0) internal successors, (44160), 192 states have internal predecessors, (44160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:58:27,524 INFO L81 ComplementDD]: Finished complementDD. Result has 192 states, 192 states have (on average 230.0) internal successors, (44160), 192 states have internal predecessors, (44160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:58:27,525 INFO L175 Difference]: Start difference. First operand has 660 places, 3643 transitions, 95976 flow. Second operand 191 states and 18604 transitions. [2023-08-26 19:58:27,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 788 places, 6075 transitions, 170070 flow [2023-08-26 19:59:24,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 720 places, 6075 transitions, 161950 flow, removed 3901 selfloop flow, removed 68 redundant places. [2023-08-26 19:59:25,002 INFO L231 Difference]: Finished difference. Result has 841 places, 4375 transitions, 121812 flow [2023-08-26 19:59:25,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=92989, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=191, PETRI_FLOW=121812, PETRI_PLACES=841, PETRI_TRANSITIONS=4375} [2023-08-26 19:59:25,006 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 799 predicate places. [2023-08-26 19:59:25,006 INFO L495 AbstractCegarLoop]: Abstraction has has 841 places, 4375 transitions, 121812 flow [2023-08-26 19:59:25,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 93.53333333333333) internal successors, (2806), 30 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:59:25,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:59:25,007 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:59:25,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-26 19:59:25,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:59:25,212 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 19:59:25,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:59:25,213 INFO L85 PathProgramCache]: Analyzing trace with hash 594789447, now seen corresponding path program 13 times [2023-08-26 19:59:25,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:59:25,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449494986] [2023-08-26 19:59:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:59:25,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:59:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:59:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:59:25,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:59:25,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449494986] [2023-08-26 19:59:25,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449494986] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:59:25,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48668540] [2023-08-26 19:59:25,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 19:59:25,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:59:25,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:59:25,909 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:59:25,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-26 19:59:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:59:26,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-26 19:59:26,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:59:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:59:26,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:59:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:59:27,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48668540] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:59:27,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:59:27,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-08-26 19:59:27,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768690639] [2023-08-26 19:59:27,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:59:27,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-26 19:59:27,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:59:27,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-26 19:59:27,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2023-08-26 19:59:27,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 230 [2023-08-26 19:59:27,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 841 places, 4375 transitions, 121812 flow. Second operand has 31 states, 31 states have (on average 95.58064516129032) internal successors, (2963), 31 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:59:27,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:59:27,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 230 [2023-08-26 19:59:27,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:00:38,099 INFO L124 PetriNetUnfolderBase]: 32693/54936 cut-off events. [2023-08-26 20:00:38,099 INFO L125 PetriNetUnfolderBase]: For 6864634/6864634 co-relation queries the response was YES. [2023-08-26 20:00:41,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684507 conditions, 54936 events. 32693/54936 cut-off events. For 6864634/6864634 co-relation queries the response was YES. Maximal size of possible extension queue 1890. Compared 460831 event pairs, 855 based on Foata normal form. 306/55242 useless extension candidates. Maximal degree in co-relation 684257. Up to 24292 conditions per place. [2023-08-26 20:00:42,084 INFO L140 encePairwiseOnDemand]: 223/230 looper letters, 3299 selfloop transitions, 2050 changer transitions 533/5882 dead transitions. [2023-08-26 20:00:42,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 814 places, 5882 transitions, 174697 flow [2023-08-26 20:00:42,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-08-26 20:00:42,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2023-08-26 20:00:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 8487 transitions. [2023-08-26 20:00:42,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2023-08-26 20:00:42,093 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 8487 transitions. [2023-08-26 20:00:42,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 8487 transitions. [2023-08-26 20:00:42,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:00:42,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 8487 transitions. [2023-08-26 20:00:42,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 101.03571428571429) internal successors, (8487), 84 states have internal predecessors, (8487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:00:42,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 230.0) internal successors, (19550), 85 states have internal predecessors, (19550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:00:42,108 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 230.0) internal successors, (19550), 85 states have internal predecessors, (19550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:00:42,108 INFO L175 Difference]: Start difference. First operand has 841 places, 4375 transitions, 121812 flow. Second operand 84 states and 8487 transitions. [2023-08-26 20:00:42,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 814 places, 5882 transitions, 174697 flow [2023-08-26 20:03:19,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 683 places, 5882 transitions, 160203 flow, removed 6977 selfloop flow, removed 131 redundant places. [2023-08-26 20:03:19,322 INFO L231 Difference]: Finished difference. Result has 700 places, 4815 transitions, 134663 flow [2023-08-26 20:03:19,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=115514, PETRI_DIFFERENCE_MINUEND_PLACES=600, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1604, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2702, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=134663, PETRI_PLACES=700, PETRI_TRANSITIONS=4815} [2023-08-26 20:03:19,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 658 predicate places. [2023-08-26 20:03:19,325 INFO L495 AbstractCegarLoop]: Abstraction has has 700 places, 4815 transitions, 134663 flow [2023-08-26 20:03:19,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 95.58064516129032) internal successors, (2963), 31 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:03:19,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:03:19,326 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:03:19,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-26 20:03:19,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:03:19,526 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 20:03:19,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:03:19,527 INFO L85 PathProgramCache]: Analyzing trace with hash -656191513, now seen corresponding path program 14 times [2023-08-26 20:03:19,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:03:19,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400482926] [2023-08-26 20:03:19,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:03:19,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:03:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:03:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:03:20,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:03:20,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400482926] [2023-08-26 20:03:20,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400482926] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 20:03:20,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774587770] [2023-08-26 20:03:20,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 20:03:20,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 20:03:20,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:03:20,336 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 20:03:20,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-26 20:03:20,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 20:03:20,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 20:03:20,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-26 20:03:20,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 20:03:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:03:20,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 20:03:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:03:23,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774587770] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 20:03:23,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 20:03:23,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-26 20:03:23,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376565078] [2023-08-26 20:03:23,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 20:03:23,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-26 20:03:23,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:03:23,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-26 20:03:23,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2023-08-26 20:03:23,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 230 [2023-08-26 20:03:23,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 700 places, 4815 transitions, 134663 flow. Second operand has 30 states, 30 states have (on average 93.53333333333333) internal successors, (2806), 30 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:03:23,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:03:23,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 230 [2023-08-26 20:03:23,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-26 20:04:48,969 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 20:04:48,969 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 20:04:49,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-26 20:04:49,983 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 [2023-08-26 20:04:51,403 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12ASSERT_VIOLATIONASSERT (15 of 16 remaining) [2023-08-26 20:04:51,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-26 20:04:51,404 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-08-26 20:04:51,405 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-08-26 20:04:51,405 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2023-08-26 20:04:51,405 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-08-26 20:04:51,405 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-08-26 20:04:51,405 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-08-26 20:04:51,405 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2023-08-26 20:04:51,405 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2023-08-26 20:04:51,406 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-08-26 20:04:51,406 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-08-26 20:04:51,406 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-08-26 20:04:51,406 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-08-26 20:04:51,406 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2023-08-26 20:04:51,406 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 16 remaining) [2023-08-26 20:04:51,406 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 16 remaining) [2023-08-26 20:04:51,406 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 16 remaining) [2023-08-26 20:04:51,407 INFO L445 BasicCegarLoop]: Path program histogram: [14, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:04:51,409 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 20:04:51,409 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 20:04:51,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 08:04:51 BasicIcfg [2023-08-26 20:04:51,411 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 20:04:51,412 INFO L158 Benchmark]: Toolchain (without parser) took 782441.39ms. Allocated memory was 396.4MB in the beginning and 8.4GB in the end (delta: 8.0GB). Free memory was 372.8MB in the beginning and 3.6GB in the end (delta: -3.3GB). Peak memory consumption was 5.1GB. Max. memory is 16.0GB. [2023-08-26 20:04:51,412 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 396.4MB. Free memory is still 373.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 20:04:51,412 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.01ms. Allocated memory is still 396.4MB. Free memory was 372.8MB in the beginning and 361.7MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 20:04:51,412 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.45ms. Allocated memory is still 396.4MB. Free memory was 361.7MB in the beginning and 359.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 20:04:51,412 INFO L158 Benchmark]: Boogie Preprocessor took 44.16ms. Allocated memory is still 396.4MB. Free memory was 359.6MB in the beginning and 357.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 20:04:51,412 INFO L158 Benchmark]: RCFGBuilder took 594.09ms. Allocated memory is still 396.4MB. Free memory was 357.5MB in the beginning and 336.2MB in the end (delta: 21.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 20:04:51,413 INFO L158 Benchmark]: TraceAbstraction took 781489.47ms. Allocated memory was 396.4MB in the beginning and 8.4GB in the end (delta: 8.0GB). Free memory was 335.3MB in the beginning and 3.6GB in the end (delta: -3.3GB). Peak memory consumption was 5.1GB. Max. memory is 16.0GB. [2023-08-26 20:04:51,414 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 396.4MB. Free memory is still 373.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 254.01ms. Allocated memory is still 396.4MB. Free memory was 372.8MB in the beginning and 361.7MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 50.45ms. Allocated memory is still 396.4MB. Free memory was 361.7MB in the beginning and 359.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 44.16ms. Allocated memory is still 396.4MB. Free memory was 359.6MB in the beginning and 357.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 594.09ms. Allocated memory is still 396.4MB. Free memory was 357.5MB in the beginning and 336.2MB in the end (delta: 21.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 781489.47ms. Allocated memory was 396.4MB in the beginning and 8.4GB in the end (delta: 8.0GB). Free memory was 335.3MB in the beginning and 3.6GB in the end (delta: -3.3GB). Peak memory consumption was 5.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.2s, 112 PlacesBefore, 42 PlacesAfterwards, 109 TransitionsBefore, 34 TransitionsAfterwards, 1742 CoEnabledTransitionPairs, 7 FixpointIterations, 51 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 4 ConcurrentYvCompositions, 5 ChoiceCompositions, 107 TotalNumberOfCompositions, 2974 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2320, independent: 2268, independent conditional: 0, independent unconditional: 2268, dependent: 52, dependent conditional: 0, dependent unconditional: 52, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 983, independent: 961, independent conditional: 0, independent unconditional: 961, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2320, independent: 1307, independent conditional: 0, independent unconditional: 1307, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 983, unknown conditional: 0, unknown unconditional: 983] , Statistics on independence cache: Total cache size (in pairs): 86, Positive cache size: 81, Positive conditional cache size: 0, Positive unconditional cache size: 81, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 115]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 114]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 113]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 148 locations, 16 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: 781.4s, OverallIterations: 33, TraceHistogramMax: 7, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 733.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12934 SdHoareTripleChecker+Valid, 19.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12934 mSDsluCounter, 24 SdHoareTripleChecker+Invalid, 16.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 12 mSDsCounter, 793 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 32787 IncrementalHoareTripleChecker+Invalid, 33580 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 793 mSolverCounterUnsat, 12 mSDtfsCounter, 32787 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2571 GetRequests, 756 SyntacticMatches, 19 SemanticMatches, 1796 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78923 ImplicationChecksByTransitivity, 76.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134663occurred in iteration=32, InterpolantAutomatonStates: 1362, 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: 0.3s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 36.4s InterpolantComputationTime, 1207 NumberOfCodeBlocks, 1207 NumberOfCodeBlocksAsserted, 95 NumberOfCheckSat, 1658 ConstructedInterpolants, 0 QuantifiedInterpolants, 32094 SizeOfPredicates, 666 NumberOfNonLiveVariables, 3500 ConjunctsInSsa, 280 ConjunctsInUnsatCore, 71 InterpolantComputations, 14 PerfectInterpolantSequences, 163/933 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown