./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:19:17,720 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:19:17,808 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:19:17,814 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:19:17,815 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:19:17,843 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:19:17,844 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:19:17,844 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:19:17,845 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:19:17,846 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:19:17,847 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:19:17,847 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:19:17,848 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:19:17,848 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:19:17,849 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:19:17,849 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:19:17,850 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:19:17,851 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:19:17,851 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:19:17,852 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:19:17,852 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:19:17,853 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:19:17,853 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:19:17,854 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:19:17,854 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:19:17,854 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:19:17,855 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:19:17,855 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:19:17,856 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:19:17,856 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:19:17,857 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:19:17,857 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:19:17,858 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:19:17,858 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:19:17,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:19:17,859 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:19:17,859 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:19:17,860 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:19:17,860 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:19:17,861 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2023-11-21 22:19:18,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:19:18,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:19:18,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:19:18,213 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:19:18,213 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:19:18,214 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/pthread/stack_longest-2.i [2023-11-21 22:19:21,346 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:19:21,685 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:19:21,686 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/sv-benchmarks/c/pthread/stack_longest-2.i [2023-11-21 22:19:21,733 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/data/d8c1d4c09/8cee765cbda74eb398140dce6bf744c0/FLAGdf4605a86 [2023-11-21 22:19:21,765 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/data/d8c1d4c09/8cee765cbda74eb398140dce6bf744c0 [2023-11-21 22:19:21,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:19:21,778 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:19:21,780 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:19:21,781 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:19:21,789 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:19:21,790 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:19:21" (1/1) ... [2023-11-21 22:19:21,791 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d756197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:21, skipping insertion in model container [2023-11-21 22:19:21,792 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:19:21" (1/1) ... [2023-11-21 22:19:21,862 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:19:22,639 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:19:22,655 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:19:22,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:19:22,863 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:19:22,863 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:22 WrapperNode [2023-11-21 22:19:22,864 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:19:22,865 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:19:22,866 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:19:22,866 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:19:22,875 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:22" (1/1) ... [2023-11-21 22:19:22,915 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:22" (1/1) ... [2023-11-21 22:19:22,973 INFO L138 Inliner]: procedures = 278, calls = 41, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 160 [2023-11-21 22:19:22,973 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:19:22,974 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:19:22,975 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:19:22,975 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:19:22,987 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:22" (1/1) ... [2023-11-21 22:19:22,987 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:22" (1/1) ... [2023-11-21 22:19:23,008 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:22" (1/1) ... [2023-11-21 22:19:23,011 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:22" (1/1) ... [2023-11-21 22:19:23,021 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:22" (1/1) ... [2023-11-21 22:19:23,039 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:22" (1/1) ... [2023-11-21 22:19:23,042 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:22" (1/1) ... [2023-11-21 22:19:23,058 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:22" (1/1) ... [2023-11-21 22:19:23,062 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:19:23,064 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:19:23,064 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:19:23,064 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:19:23,065 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:22" (1/1) ... [2023-11-21 22:19:23,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:19:23,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:23,115 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:19:23,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:19:23,175 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-21 22:19:23,175 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-21 22:19:23,176 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-21 22:19:23,176 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-21 22:19:23,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:19:23,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:19:23,177 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-21 22:19:23,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:19:23,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:19:23,178 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-21 22:19:23,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:19:23,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 22:19:23,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:19:23,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:19:23,181 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 22:19:23,428 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:19:23,431 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:19:23,934 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:19:24,199 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:19:24,200 INFO L308 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-21 22:19:24,201 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:19:24 BoogieIcfgContainer [2023-11-21 22:19:24,202 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:19:24,205 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:19:24,205 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:19:24,208 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:19:24,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:19:21" (1/3) ... [2023-11-21 22:19:24,209 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18507637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:19:24, skipping insertion in model container [2023-11-21 22:19:24,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:19:22" (2/3) ... [2023-11-21 22:19:24,210 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18507637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:19:24, skipping insertion in model container [2023-11-21 22:19:24,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:19:24" (3/3) ... [2023-11-21 22:19:24,212 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2023-11-21 22:19:24,231 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:19:24,232 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-11-21 22:19:24,232 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 22:19:24,337 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-21 22:19:24,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 67 transitions, 148 flow [2023-11-21 22:19:24,423 INFO L124 PetriNetUnfolderBase]: 9/65 cut-off events. [2023-11-21 22:19:24,423 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-21 22:19:24,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 65 events. 9/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 168 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 53. Up to 3 conditions per place. [2023-11-21 22:19:24,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 67 transitions, 148 flow [2023-11-21 22:19:24,435 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 64 transitions, 140 flow [2023-11-21 22:19:24,446 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:19:24,453 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=All, 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;@7d9c9a2a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:19:24,454 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-11-21 22:19:24,457 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:19:24,458 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-21 22:19:24,458 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:19:24,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:24,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-21 22:19:24,460 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:19:24,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:24,465 INFO L85 PathProgramCache]: Analyzing trace with hash 14155, now seen corresponding path program 1 times [2023-11-21 22:19:24,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:24,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398034791] [2023-11-21 22:19:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:24,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:24,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:24,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398034791] [2023-11-21 22:19:24,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398034791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:24,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:24,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:19:24,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156267528] [2023-11-21 22:19:24,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:24,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:19:24,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:24,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:19:24,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:19:24,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2023-11-21 22:19:24,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:24,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:24,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2023-11-21 22:19:24,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:25,396 INFO L124 PetriNetUnfolderBase]: 731/1402 cut-off events. [2023-11-21 22:19:25,397 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-11-21 22:19:25,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2568 conditions, 1402 events. 731/1402 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7868 event pairs, 559 based on Foata normal form. 138/1308 useless extension candidates. Maximal degree in co-relation 2462. Up to 1125 conditions per place. [2023-11-21 22:19:25,414 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 32 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-11-21 22:19:25,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 56 transitions, 192 flow [2023-11-21 22:19:25,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:19:25,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:19:25,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2023-11-21 22:19:25,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5572139303482587 [2023-11-21 22:19:25,430 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2023-11-21 22:19:25,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2023-11-21 22:19:25,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:25,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2023-11-21 22:19:25,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:25,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 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) [2023-11-21 22:19:25,443 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 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) [2023-11-21 22:19:25,445 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 140 flow. Second operand 3 states and 112 transitions. [2023-11-21 22:19:25,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 56 transitions, 192 flow [2023-11-21 22:19:25,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 56 transitions, 184 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-21 22:19:25,459 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 120 flow [2023-11-21 22:19:25,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2023-11-21 22:19:25,465 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2023-11-21 22:19:25,466 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 120 flow [2023-11-21 22:19:25,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:25,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:25,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-21 22:19:25,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:19:25,467 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:19:25,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:25,468 INFO L85 PathProgramCache]: Analyzing trace with hash 14156, now seen corresponding path program 1 times [2023-11-21 22:19:25,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:25,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141019491] [2023-11-21 22:19:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:25,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:25,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:25,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141019491] [2023-11-21 22:19:25,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141019491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:25,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:25,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:19:25,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256841432] [2023-11-21 22:19:25,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:25,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:19:25,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:25,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:19:25,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:19:25,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 67 [2023-11-21 22:19:25,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:25,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:25,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 67 [2023-11-21 22:19:25,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:25,794 INFO L124 PetriNetUnfolderBase]: 456/945 cut-off events. [2023-11-21 22:19:25,795 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2023-11-21 22:19:25,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1691 conditions, 945 events. 456/945 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5203 event pairs, 339 based on Foata normal form. 122/896 useless extension candidates. Maximal degree in co-relation 1681. Up to 728 conditions per place. [2023-11-21 22:19:25,803 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 30 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-11-21 22:19:25,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 54 transitions, 180 flow [2023-11-21 22:19:25,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:19:25,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:19:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2023-11-21 22:19:25,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5572139303482587 [2023-11-21 22:19:25,806 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2023-11-21 22:19:25,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2023-11-21 22:19:25,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:25,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2023-11-21 22:19:25,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:25,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 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) [2023-11-21 22:19:25,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 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) [2023-11-21 22:19:25,810 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 120 flow. Second operand 3 states and 112 transitions. [2023-11-21 22:19:25,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 54 transitions, 180 flow [2023-11-21 22:19:25,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:19:25,813 INFO L231 Difference]: Finished difference. Result has 54 places, 54 transitions, 116 flow [2023-11-21 22:19:25,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=54, PETRI_TRANSITIONS=54} [2023-11-21 22:19:25,814 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -8 predicate places. [2023-11-21 22:19:25,814 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 54 transitions, 116 flow [2023-11-21 22:19:25,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:25,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:25,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:19:25,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:19:25,815 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:19:25,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:25,816 INFO L85 PathProgramCache]: Analyzing trace with hash 422146670, now seen corresponding path program 1 times [2023-11-21 22:19:25,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:25,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735422081] [2023-11-21 22:19:25,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:25,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:25,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:25,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735422081] [2023-11-21 22:19:25,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735422081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:25,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:25,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:19:25,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909200751] [2023-11-21 22:19:25,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:25,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:19:25,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:25,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:19:25,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:19:25,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2023-11-21 22:19:25,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:25,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:25,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2023-11-21 22:19:25,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:26,073 INFO L124 PetriNetUnfolderBase]: 481/984 cut-off events. [2023-11-21 22:19:26,073 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-21 22:19:26,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1777 conditions, 984 events. 481/984 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5410 event pairs, 359 based on Foata normal form. 0/823 useless extension candidates. Maximal degree in co-relation 1767. Up to 775 conditions per place. [2023-11-21 22:19:26,081 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 32 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-11-21 22:19:26,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 180 flow [2023-11-21 22:19:26,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:19:26,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:19:26,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2023-11-21 22:19:26,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373134328358209 [2023-11-21 22:19:26,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2023-11-21 22:19:26,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2023-11-21 22:19:26,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:26,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2023-11-21 22:19:26,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:26,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 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) [2023-11-21 22:19:26,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 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) [2023-11-21 22:19:26,087 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 116 flow. Second operand 3 states and 108 transitions. [2023-11-21 22:19:26,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 180 flow [2023-11-21 22:19:26,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:19:26,090 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 112 flow [2023-11-21 22:19:26,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2023-11-21 22:19:26,091 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -10 predicate places. [2023-11-21 22:19:26,091 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 112 flow [2023-11-21 22:19:26,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:26,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:26,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:19:26,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:19:26,092 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:19:26,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:26,093 INFO L85 PathProgramCache]: Analyzing trace with hash 422146671, now seen corresponding path program 1 times [2023-11-21 22:19:26,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:26,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437120393] [2023-11-21 22:19:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:26,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:26,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:26,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437120393] [2023-11-21 22:19:26,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437120393] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:26,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:26,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:19:26,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903458851] [2023-11-21 22:19:26,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:26,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:19:26,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:26,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:19:26,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:19:26,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 67 [2023-11-21 22:19:26,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:26,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:26,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 67 [2023-11-21 22:19:26,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:26,410 INFO L124 PetriNetUnfolderBase]: 456/929 cut-off events. [2023-11-21 22:19:26,410 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2023-11-21 22:19:26,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1675 conditions, 929 events. 456/929 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5047 event pairs, 339 based on Foata normal form. 21/795 useless extension candidates. Maximal degree in co-relation 1665. Up to 728 conditions per place. [2023-11-21 22:19:26,419 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 30 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-11-21 22:19:26,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 50 transitions, 172 flow [2023-11-21 22:19:26,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:19:26,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:19:26,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2023-11-21 22:19:26,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5572139303482587 [2023-11-21 22:19:26,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2023-11-21 22:19:26,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2023-11-21 22:19:26,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:26,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2023-11-21 22:19:26,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:26,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 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) [2023-11-21 22:19:26,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 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) [2023-11-21 22:19:26,428 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 112 flow. Second operand 3 states and 112 transitions. [2023-11-21 22:19:26,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 50 transitions, 172 flow [2023-11-21 22:19:26,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:19:26,430 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 108 flow [2023-11-21 22:19:26,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2023-11-21 22:19:26,432 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -12 predicate places. [2023-11-21 22:19:26,432 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 108 flow [2023-11-21 22:19:26,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:26,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:26,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:26,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:19:26,433 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:19:26,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:26,434 INFO L85 PathProgramCache]: Analyzing trace with hash -271719771, now seen corresponding path program 1 times [2023-11-21 22:19:26,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:26,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437950488] [2023-11-21 22:19:26,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:26,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:26,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:26,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437950488] [2023-11-21 22:19:26,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437950488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:26,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:26,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:19:26,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147831995] [2023-11-21 22:19:26,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:26,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:19:26,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:26,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:19:26,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:19:26,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 67 [2023-11-21 22:19:26,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:26,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:26,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 67 [2023-11-21 22:19:26,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:26,995 INFO L124 PetriNetUnfolderBase]: 731/1332 cut-off events. [2023-11-21 22:19:26,995 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-21 22:19:26,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2475 conditions, 1332 events. 731/1332 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7230 event pairs, 399 based on Foata normal form. 0/1138 useless extension candidates. Maximal degree in co-relation 2465. Up to 797 conditions per place. [2023-11-21 22:19:27,006 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 46 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2023-11-21 22:19:27,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 239 flow [2023-11-21 22:19:27,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:19:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:19:27,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 151 transitions. [2023-11-21 22:19:27,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634328358208955 [2023-11-21 22:19:27,008 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 151 transitions. [2023-11-21 22:19:27,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 151 transitions. [2023-11-21 22:19:27,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:27,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 151 transitions. [2023-11-21 22:19:27,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:27,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:27,011 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:27,012 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 108 flow. Second operand 4 states and 151 transitions. [2023-11-21 22:19:27,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 239 flow [2023-11-21 22:19:27,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 235 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:19:27,014 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 110 flow [2023-11-21 22:19:27,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2023-11-21 22:19:27,016 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -12 predicate places. [2023-11-21 22:19:27,016 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 110 flow [2023-11-21 22:19:27,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:27,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:27,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:27,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:19:27,017 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:19:27,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:27,018 INFO L85 PathProgramCache]: Analyzing trace with hash -271719770, now seen corresponding path program 1 times [2023-11-21 22:19:27,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:27,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970323313] [2023-11-21 22:19:27,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:27,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:27,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:27,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:27,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970323313] [2023-11-21 22:19:27,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970323313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:27,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:27,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:19:27,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674550338] [2023-11-21 22:19:27,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:27,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:19:27,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:27,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:19:27,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:19:27,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 67 [2023-11-21 22:19:27,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 110 flow. Second operand has 6 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:27,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:27,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 67 [2023-11-21 22:19:27,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:28,007 INFO L124 PetriNetUnfolderBase]: 574/1114 cut-off events. [2023-11-21 22:19:28,008 INFO L125 PetriNetUnfolderBase]: For 48/49 co-relation queries the response was YES. [2023-11-21 22:19:28,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2129 conditions, 1114 events. 574/1114 cut-off events. For 48/49 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5635 event pairs, 179 based on Foata normal form. 9/973 useless extension candidates. Maximal degree in co-relation 697. Up to 756 conditions per place. [2023-11-21 22:19:28,017 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 60 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2023-11-21 22:19:28,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 81 transitions, 313 flow [2023-11-21 22:19:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:19:28,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 22:19:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 232 transitions. [2023-11-21 22:19:28,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5771144278606966 [2023-11-21 22:19:28,020 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 232 transitions. [2023-11-21 22:19:28,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 232 transitions. [2023-11-21 22:19:28,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:28,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 232 transitions. [2023-11-21 22:19:28,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 38.666666666666664) internal successors, (232), 6 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:28,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:28,025 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:28,026 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 110 flow. Second operand 6 states and 232 transitions. [2023-11-21 22:19:28,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 81 transitions, 313 flow [2023-11-21 22:19:28,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 81 transitions, 301 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 22:19:28,031 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 145 flow [2023-11-21 22:19:28,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=145, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2023-11-21 22:19:28,034 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -7 predicate places. [2023-11-21 22:19:28,035 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 145 flow [2023-11-21 22:19:28,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:28,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:28,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:28,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:19:28,036 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:19:28,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:28,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1139511957, now seen corresponding path program 1 times [2023-11-21 22:19:28,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:28,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302331914] [2023-11-21 22:19:28,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:28,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:28,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:28,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302331914] [2023-11-21 22:19:28,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302331914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:28,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:28,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:19:28,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200299768] [2023-11-21 22:19:28,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:28,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:19:28,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:28,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:19:28,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:19:28,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 67 [2023-11-21 22:19:28,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 145 flow. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:28,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:28,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 67 [2023-11-21 22:19:28,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:28,437 INFO L124 PetriNetUnfolderBase]: 823/1586 cut-off events. [2023-11-21 22:19:28,437 INFO L125 PetriNetUnfolderBase]: For 297/301 co-relation queries the response was YES. [2023-11-21 22:19:28,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3288 conditions, 1586 events. 823/1586 cut-off events. For 297/301 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8594 event pairs, 363 based on Foata normal form. 1/1439 useless extension candidates. Maximal degree in co-relation 1129. Up to 859 conditions per place. [2023-11-21 22:19:28,452 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 71 selfloop transitions, 5 changer transitions 0/93 dead transitions. [2023-11-21 22:19:28,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 93 transitions, 397 flow [2023-11-21 22:19:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:19:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:19:28,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 185 transitions. [2023-11-21 22:19:28,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6902985074626866 [2023-11-21 22:19:28,454 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 185 transitions. [2023-11-21 22:19:28,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 185 transitions. [2023-11-21 22:19:28,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:28,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 185 transitions. [2023-11-21 22:19:28,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:28,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:28,456 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:28,457 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 145 flow. Second operand 4 states and 185 transitions. [2023-11-21 22:19:28,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 93 transitions, 397 flow [2023-11-21 22:19:28,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 93 transitions, 395 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:19:28,462 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 176 flow [2023-11-21 22:19:28,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2023-11-21 22:19:28,464 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2023-11-21 22:19:28,464 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 176 flow [2023-11-21 22:19:28,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:28,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:28,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:28,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:19:28,467 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:19:28,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:28,468 INFO L85 PathProgramCache]: Analyzing trace with hash -698602535, now seen corresponding path program 1 times [2023-11-21 22:19:28,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:28,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390836129] [2023-11-21 22:19:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:28,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:28,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:28,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390836129] [2023-11-21 22:19:28,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390836129] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:28,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:28,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:19:28,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531264742] [2023-11-21 22:19:28,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:28,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:19:28,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:28,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:19:28,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:19:28,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 67 [2023-11-21 22:19:28,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:28,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:28,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 67 [2023-11-21 22:19:28,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:28,853 INFO L124 PetriNetUnfolderBase]: 952/1765 cut-off events. [2023-11-21 22:19:28,853 INFO L125 PetriNetUnfolderBase]: For 510/511 co-relation queries the response was YES. [2023-11-21 22:19:28,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 1765 events. 952/1765 cut-off events. For 510/511 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 9674 event pairs, 401 based on Foata normal form. 12/1619 useless extension candidates. Maximal degree in co-relation 1032. Up to 1186 conditions per place. [2023-11-21 22:19:28,873 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 56 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-11-21 22:19:28,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 342 flow [2023-11-21 22:19:28,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:19:28,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:19:28,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2023-11-21 22:19:28,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6965174129353234 [2023-11-21 22:19:28,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 140 transitions. [2023-11-21 22:19:28,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 140 transitions. [2023-11-21 22:19:28,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:28,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 140 transitions. [2023-11-21 22:19:28,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:28,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 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) [2023-11-21 22:19:28,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 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) [2023-11-21 22:19:28,877 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 176 flow. Second operand 3 states and 140 transitions. [2023-11-21 22:19:28,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 342 flow [2023-11-21 22:19:28,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 75 transitions, 337 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-21 22:19:28,884 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 178 flow [2023-11-21 22:19:28,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2023-11-21 22:19:28,885 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -2 predicate places. [2023-11-21 22:19:28,885 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 178 flow [2023-11-21 22:19:28,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:28,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:28,886 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:28,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 22:19:28,886 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:19:28,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:28,887 INFO L85 PathProgramCache]: Analyzing trace with hash 551374166, now seen corresponding path program 1 times [2023-11-21 22:19:28,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:28,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112467204] [2023-11-21 22:19:28,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:28,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:29,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:29,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112467204] [2023-11-21 22:19:29,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112467204] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:29,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086976249] [2023-11-21 22:19:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:29,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:29,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:29,328 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:29,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:19:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:29,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-21 22:19:29,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:29,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:19:29,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:19:29,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-21 22:19:29,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:19:29,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:19:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:29,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:30,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086976249] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:30,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:30,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2023-11-21 22:19:30,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928226653] [2023-11-21 22:19:30,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:30,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 22:19:30,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:30,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 22:19:30,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:19:30,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 67 [2023-11-21 22:19:30,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 178 flow. Second operand has 16 states, 16 states have (on average 28.875) internal successors, (462), 16 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:30,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:30,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 67 [2023-11-21 22:19:30,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:33,149 INFO L124 PetriNetUnfolderBase]: 3845/7259 cut-off events. [2023-11-21 22:19:33,150 INFO L125 PetriNetUnfolderBase]: For 2946/2949 co-relation queries the response was YES. [2023-11-21 22:19:33,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16851 conditions, 7259 events. 3845/7259 cut-off events. For 2946/2949 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 47843 event pairs, 186 based on Foata normal form. 210/6823 useless extension candidates. Maximal degree in co-relation 6547. Up to 1293 conditions per place. [2023-11-21 22:19:33,227 INFO L140 encePairwiseOnDemand]: 56/67 looper letters, 330 selfloop transitions, 38 changer transitions 0/383 dead transitions. [2023-11-21 22:19:33,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 383 transitions, 1833 flow [2023-11-21 22:19:33,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-21 22:19:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-21 22:19:33,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 920 transitions. [2023-11-21 22:19:33,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6538734896943852 [2023-11-21 22:19:33,232 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 920 transitions. [2023-11-21 22:19:33,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 920 transitions. [2023-11-21 22:19:33,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:33,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 920 transitions. [2023-11-21 22:19:33,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 43.80952380952381) internal successors, (920), 21 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) [2023-11-21 22:19:33,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 67.0) internal successors, (1474), 22 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:33,243 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 67.0) internal successors, (1474), 22 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:33,243 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 178 flow. Second operand 21 states and 920 transitions. [2023-11-21 22:19:33,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 383 transitions, 1833 flow [2023-11-21 22:19:33,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 383 transitions, 1830 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:19:33,260 INFO L231 Difference]: Finished difference. Result has 94 places, 93 transitions, 538 flow [2023-11-21 22:19:33,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=538, PETRI_PLACES=94, PETRI_TRANSITIONS=93} [2023-11-21 22:19:33,262 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 32 predicate places. [2023-11-21 22:19:33,263 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 93 transitions, 538 flow [2023-11-21 22:19:33,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 28.875) internal successors, (462), 16 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:33,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:33,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:33,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:33,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:33,489 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:19:33,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:33,489 INFO L85 PathProgramCache]: Analyzing trace with hash -758325483, now seen corresponding path program 1 times [2023-11-21 22:19:33,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:33,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799519102] [2023-11-21 22:19:33,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:33,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:33,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:33,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799519102] [2023-11-21 22:19:33,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799519102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:33,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:33,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:19:33,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172721121] [2023-11-21 22:19:33,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:33,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:19:33,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:33,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:19:33,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:19:33,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 67 [2023-11-21 22:19:33,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 93 transitions, 538 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:33,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:33,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 67 [2023-11-21 22:19:33,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:34,207 INFO L124 PetriNetUnfolderBase]: 1685/3555 cut-off events. [2023-11-21 22:19:34,208 INFO L125 PetriNetUnfolderBase]: For 4120/4120 co-relation queries the response was YES. [2023-11-21 22:19:34,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9423 conditions, 3555 events. 1685/3555 cut-off events. For 4120/4120 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 21552 event pairs, 359 based on Foata normal form. 226/3639 useless extension candidates. Maximal degree in co-relation 9255. Up to 2130 conditions per place. [2023-11-21 22:19:34,303 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 70 selfloop transitions, 4 changer transitions 0/91 dead transitions. [2023-11-21 22:19:34,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 91 transitions, 625 flow [2023-11-21 22:19:34,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:19:34,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:19:34,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-11-21 22:19:34,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6368159203980099 [2023-11-21 22:19:34,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-11-21 22:19:34,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-11-21 22:19:34,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:34,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-11-21 22:19:34,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:34,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 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) [2023-11-21 22:19:34,308 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 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) [2023-11-21 22:19:34,308 INFO L175 Difference]: Start difference. First operand has 94 places, 93 transitions, 538 flow. Second operand 3 states and 128 transitions. [2023-11-21 22:19:34,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 91 transitions, 625 flow [2023-11-21 22:19:34,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 91 transitions, 575 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-11-21 22:19:34,342 INFO L231 Difference]: Finished difference. Result has 87 places, 80 transitions, 403 flow [2023-11-21 22:19:34,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=403, PETRI_PLACES=87, PETRI_TRANSITIONS=80} [2023-11-21 22:19:34,344 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 25 predicate places. [2023-11-21 22:19:34,345 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 80 transitions, 403 flow [2023-11-21 22:19:34,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:34,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:34,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:34,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 22:19:34,346 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:19:34,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:34,346 INFO L85 PathProgramCache]: Analyzing trace with hash 973962272, now seen corresponding path program 1 times [2023-11-21 22:19:34,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:34,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554833276] [2023-11-21 22:19:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:34,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:34,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:34,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554833276] [2023-11-21 22:19:34,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554833276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:34,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:34,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:19:34,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068683679] [2023-11-21 22:19:34,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:34,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:19:34,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:34,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:19:34,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:19:34,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 67 [2023-11-21 22:19:34,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 80 transitions, 403 flow. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:34,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:34,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 67 [2023-11-21 22:19:34,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:35,318 INFO L124 PetriNetUnfolderBase]: 1695/3527 cut-off events. [2023-11-21 22:19:35,318 INFO L125 PetriNetUnfolderBase]: For 1755/1755 co-relation queries the response was YES. [2023-11-21 22:19:35,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8972 conditions, 3527 events. 1695/3527 cut-off events. For 1755/1755 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 21476 event pairs, 958 based on Foata normal form. 0/3413 useless extension candidates. Maximal degree in co-relation 8478. Up to 2028 conditions per place. [2023-11-21 22:19:35,354 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 55 selfloop transitions, 19 changer transitions 0/90 dead transitions. [2023-11-21 22:19:35,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 579 flow [2023-11-21 22:19:35,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:19:35,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:19:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2023-11-21 22:19:35,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5313432835820896 [2023-11-21 22:19:35,356 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 178 transitions. [2023-11-21 22:19:35,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 178 transitions. [2023-11-21 22:19:35,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:35,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 178 transitions. [2023-11-21 22:19:35,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:35,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:35,358 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:35,359 INFO L175 Difference]: Start difference. First operand has 87 places, 80 transitions, 403 flow. Second operand 5 states and 178 transitions. [2023-11-21 22:19:35,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 579 flow [2023-11-21 22:19:35,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 90 transitions, 575 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:19:35,374 INFO L231 Difference]: Finished difference. Result has 89 places, 79 transitions, 435 flow [2023-11-21 22:19:35,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=435, PETRI_PLACES=89, PETRI_TRANSITIONS=79} [2023-11-21 22:19:35,375 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 27 predicate places. [2023-11-21 22:19:35,375 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 79 transitions, 435 flow [2023-11-21 22:19:35,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:35,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:35,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:35,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 22:19:35,376 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:19:35,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:35,377 INFO L85 PathProgramCache]: Analyzing trace with hash 2068243037, now seen corresponding path program 1 times [2023-11-21 22:19:35,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:35,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519085257] [2023-11-21 22:19:35,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:35,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:35,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:35,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519085257] [2023-11-21 22:19:35,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519085257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:35,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:35,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:19:35,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730370365] [2023-11-21 22:19:35,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:35,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 22:19:35,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:35,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 22:19:35,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:19:35,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 67 [2023-11-21 22:19:35,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 79 transitions, 435 flow. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:35,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:35,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 67 [2023-11-21 22:19:35,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:37,085 INFO L124 PetriNetUnfolderBase]: 1885/3874 cut-off events. [2023-11-21 22:19:37,086 INFO L125 PetriNetUnfolderBase]: For 2829/2829 co-relation queries the response was YES. [2023-11-21 22:19:37,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10065 conditions, 3874 events. 1885/3874 cut-off events. For 2829/2829 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 23444 event pairs, 514 based on Foata normal form. 0/3728 useless extension candidates. Maximal degree in co-relation 8834. Up to 2791 conditions per place. [2023-11-21 22:19:37,141 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 115 selfloop transitions, 9 changer transitions 0/138 dead transitions. [2023-11-21 22:19:37,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 138 transitions, 894 flow [2023-11-21 22:19:37,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:19:37,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-21 22:19:37,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 303 transitions. [2023-11-21 22:19:37,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652985074626866 [2023-11-21 22:19:37,144 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 303 transitions. [2023-11-21 22:19:37,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 303 transitions. [2023-11-21 22:19:37,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:37,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 303 transitions. [2023-11-21 22:19:37,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 37.875) internal successors, (303), 8 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:37,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 67.0) internal successors, (603), 9 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:37,149 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 67.0) internal successors, (603), 9 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:37,149 INFO L175 Difference]: Start difference. First operand has 89 places, 79 transitions, 435 flow. Second operand 8 states and 303 transitions. [2023-11-21 22:19:37,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 138 transitions, 894 flow [2023-11-21 22:19:37,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 138 transitions, 844 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-21 22:19:37,170 INFO L231 Difference]: Finished difference. Result has 95 places, 84 transitions, 466 flow [2023-11-21 22:19:37,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=466, PETRI_PLACES=95, PETRI_TRANSITIONS=84} [2023-11-21 22:19:37,172 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 33 predicate places. [2023-11-21 22:19:37,172 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 84 transitions, 466 flow [2023-11-21 22:19:37,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:37,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:37,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:37,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 22:19:37,173 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:19:37,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:37,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1840575689, now seen corresponding path program 1 times [2023-11-21 22:19:37,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:37,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835637779] [2023-11-21 22:19:37,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:37,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:37,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:37,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835637779] [2023-11-21 22:19:37,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835637779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:37,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:37,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-21 22:19:37,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766568416] [2023-11-21 22:19:37,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:37,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 22:19:37,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:37,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 22:19:37,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:19:38,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 67 [2023-11-21 22:19:38,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 84 transitions, 466 flow. Second operand has 11 states, 11 states have (on average 27.90909090909091) internal successors, (307), 11 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:38,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:38,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 67 [2023-11-21 22:19:38,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:39,820 INFO L124 PetriNetUnfolderBase]: 2674/5589 cut-off events. [2023-11-21 22:19:39,821 INFO L125 PetriNetUnfolderBase]: For 3719/3720 co-relation queries the response was YES. [2023-11-21 22:19:39,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14443 conditions, 5589 events. 2674/5589 cut-off events. For 3719/3720 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 34810 event pairs, 622 based on Foata normal form. 0/5437 useless extension candidates. Maximal degree in co-relation 11784. Up to 3173 conditions per place. [2023-11-21 22:19:39,889 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 164 selfloop transitions, 11 changer transitions 0/189 dead transitions. [2023-11-21 22:19:39,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 189 transitions, 1294 flow [2023-11-21 22:19:39,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:19:39,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-21 22:19:39,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 386 transitions. [2023-11-21 22:19:39,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5761194029850746 [2023-11-21 22:19:39,892 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 386 transitions. [2023-11-21 22:19:39,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 386 transitions. [2023-11-21 22:19:39,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:39,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 386 transitions. [2023-11-21 22:19:39,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 38.6) internal successors, (386), 10 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:39,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 67.0) internal successors, (737), 11 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:39,897 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 67.0) internal successors, (737), 11 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:39,898 INFO L175 Difference]: Start difference. First operand has 95 places, 84 transitions, 466 flow. Second operand 10 states and 386 transitions. [2023-11-21 22:19:39,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 189 transitions, 1294 flow [2023-11-21 22:19:39,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 189 transitions, 1283 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-21 22:19:39,925 INFO L231 Difference]: Finished difference. Result has 106 places, 92 transitions, 561 flow [2023-11-21 22:19:39,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=561, PETRI_PLACES=106, PETRI_TRANSITIONS=92} [2023-11-21 22:19:39,926 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 44 predicate places. [2023-11-21 22:19:39,927 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 92 transitions, 561 flow [2023-11-21 22:19:39,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 27.90909090909091) internal successors, (307), 11 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:39,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:39,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:39,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 22:19:39,928 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:19:39,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:39,929 INFO L85 PathProgramCache]: Analyzing trace with hash -147688417, now seen corresponding path program 2 times [2023-11-21 22:19:39,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:39,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034763525] [2023-11-21 22:19:39,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:39,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:40,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:40,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:40,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034763525] [2023-11-21 22:19:40,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034763525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:40,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:40,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-21 22:19:40,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224329691] [2023-11-21 22:19:40,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:40,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 22:19:40,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:40,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 22:19:40,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:19:40,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 67 [2023-11-21 22:19:40,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 92 transitions, 561 flow. Second operand has 11 states, 11 states have (on average 27.90909090909091) internal successors, (307), 11 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:40,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:40,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 67 [2023-11-21 22:19:40,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:42,882 INFO L124 PetriNetUnfolderBase]: 3253/6775 cut-off events. [2023-11-21 22:19:42,882 INFO L125 PetriNetUnfolderBase]: For 5445/5445 co-relation queries the response was YES. [2023-11-21 22:19:42,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18158 conditions, 6775 events. 3253/6775 cut-off events. For 5445/5445 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 42884 event pairs, 626 based on Foata normal form. 0/6604 useless extension candidates. Maximal degree in co-relation 14379. Up to 2830 conditions per place. [2023-11-21 22:19:42,955 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 157 selfloop transitions, 19 changer transitions 0/190 dead transitions. [2023-11-21 22:19:42,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 190 transitions, 1347 flow [2023-11-21 22:19:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:19:42,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-21 22:19:42,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 438 transitions. [2023-11-21 22:19:42,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447761194029851 [2023-11-21 22:19:42,959 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 438 transitions. [2023-11-21 22:19:42,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 438 transitions. [2023-11-21 22:19:42,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:42,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 438 transitions. [2023-11-21 22:19:42,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 36.5) internal successors, (438), 12 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:42,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 67.0) internal successors, (871), 13 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:42,965 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 67.0) internal successors, (871), 13 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:42,965 INFO L175 Difference]: Start difference. First operand has 106 places, 92 transitions, 561 flow. Second operand 12 states and 438 transitions. [2023-11-21 22:19:42,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 190 transitions, 1347 flow [2023-11-21 22:19:43,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 190 transitions, 1335 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-21 22:19:43,004 INFO L231 Difference]: Finished difference. Result has 119 places, 97 transitions, 644 flow [2023-11-21 22:19:43,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=644, PETRI_PLACES=119, PETRI_TRANSITIONS=97} [2023-11-21 22:19:43,006 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 57 predicate places. [2023-11-21 22:19:43,006 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 97 transitions, 644 flow [2023-11-21 22:19:43,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 27.90909090909091) internal successors, (307), 11 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:43,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:43,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:43,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 22:19:43,008 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:19:43,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:43,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1087338323, now seen corresponding path program 1 times [2023-11-21 22:19:43,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:43,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667672743] [2023-11-21 22:19:43,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:43,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:43,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:43,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667672743] [2023-11-21 22:19:43,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667672743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:43,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:19:43,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:19:43,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484033905] [2023-11-21 22:19:43,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:43,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:19:43,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:43,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:19:43,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:19:43,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 67 [2023-11-21 22:19:43,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 97 transitions, 644 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:43,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:43,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 67 [2023-11-21 22:19:43,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:45,263 INFO L124 PetriNetUnfolderBase]: 4446/9281 cut-off events. [2023-11-21 22:19:45,263 INFO L125 PetriNetUnfolderBase]: For 8986/8986 co-relation queries the response was YES. [2023-11-21 22:19:45,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25356 conditions, 9281 events. 4446/9281 cut-off events. For 8986/8986 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 65956 event pairs, 2244 based on Foata normal form. 156/9173 useless extension candidates. Maximal degree in co-relation 20517. Up to 5730 conditions per place. [2023-11-21 22:19:45,390 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 139 selfloop transitions, 2 changer transitions 0/158 dead transitions. [2023-11-21 22:19:45,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 158 transitions, 1392 flow [2023-11-21 22:19:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:19:45,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:19:45,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2023-11-21 22:19:45,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7014925373134329 [2023-11-21 22:19:45,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 141 transitions. [2023-11-21 22:19:45,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 141 transitions. [2023-11-21 22:19:45,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:45,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 141 transitions. [2023-11-21 22:19:45,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:45,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 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) [2023-11-21 22:19:45,396 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 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) [2023-11-21 22:19:45,396 INFO L175 Difference]: Start difference. First operand has 119 places, 97 transitions, 644 flow. Second operand 3 states and 141 transitions. [2023-11-21 22:19:45,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 158 transitions, 1392 flow [2023-11-21 22:19:45,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 158 transitions, 1336 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-11-21 22:19:45,475 INFO L231 Difference]: Finished difference. Result has 117 places, 98 transitions, 622 flow [2023-11-21 22:19:45,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=622, PETRI_PLACES=117, PETRI_TRANSITIONS=98} [2023-11-21 22:19:45,478 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 55 predicate places. [2023-11-21 22:19:45,481 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 98 transitions, 622 flow [2023-11-21 22:19:45,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:45,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:45,483 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:45,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-21 22:19:45,483 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:19:45,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:45,485 INFO L85 PathProgramCache]: Analyzing trace with hash -963282203, now seen corresponding path program 1 times [2023-11-21 22:19:45,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:45,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431623853] [2023-11-21 22:19:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:45,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:45,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:45,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431623853] [2023-11-21 22:19:45,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431623853] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:45,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921862372] [2023-11-21 22:19:45,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:45,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:45,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:45,614 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:45,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:19:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:45,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:19:45,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:45,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:45,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921862372] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:45,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:45,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-21 22:19:45,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737018411] [2023-11-21 22:19:45,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:45,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 22:19:45,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:45,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 22:19:45,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:19:45,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 67 [2023-11-21 22:19:45,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 98 transitions, 622 flow. Second operand has 9 states, 9 states have (on average 32.888888888888886) internal successors, (296), 9 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:45,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:45,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 67 [2023-11-21 22:19:45,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:49,402 INFO L124 PetriNetUnfolderBase]: 7569/15828 cut-off events. [2023-11-21 22:19:49,402 INFO L125 PetriNetUnfolderBase]: For 17897/17915 co-relation queries the response was YES. [2023-11-21 22:19:49,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45560 conditions, 15828 events. 7569/15828 cut-off events. For 17897/17915 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 116880 event pairs, 2091 based on Foata normal form. 454/16070 useless extension candidates. Maximal degree in co-relation 35370. Up to 2702 conditions per place. [2023-11-21 22:19:49,571 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 251 selfloop transitions, 51 changer transitions 0/318 dead transitions. [2023-11-21 22:19:49,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 318 transitions, 2376 flow [2023-11-21 22:19:49,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:19:49,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-21 22:19:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 455 transitions. [2023-11-21 22:19:49,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7545605306799337 [2023-11-21 22:19:49,575 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 455 transitions. [2023-11-21 22:19:49,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 455 transitions. [2023-11-21 22:19:49,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:49,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 455 transitions. [2023-11-21 22:19:49,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 50.55555555555556) internal successors, (455), 9 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:49,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 67.0) internal successors, (670), 10 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:49,581 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 67.0) internal successors, (670), 10 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:49,581 INFO L175 Difference]: Start difference. First operand has 117 places, 98 transitions, 622 flow. Second operand 9 states and 455 transitions. [2023-11-21 22:19:49,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 318 transitions, 2376 flow [2023-11-21 22:19:49,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 318 transitions, 2321 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-11-21 22:19:49,692 INFO L231 Difference]: Finished difference. Result has 130 places, 132 transitions, 1033 flow [2023-11-21 22:19:49,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1033, PETRI_PLACES=130, PETRI_TRANSITIONS=132} [2023-11-21 22:19:49,693 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 68 predicate places. [2023-11-21 22:19:49,693 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 132 transitions, 1033 flow [2023-11-21 22:19:49,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 32.888888888888886) internal successors, (296), 9 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:49,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:49,694 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:49,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-21 22:19:49,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:49,895 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:19:49,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:49,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1156038727, now seen corresponding path program 1 times [2023-11-21 22:19:49,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:49,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448795325] [2023-11-21 22:19:49,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:49,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:50,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:50,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448795325] [2023-11-21 22:19:50,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448795325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:50,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126360437] [2023-11-21 22:19:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:50,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:50,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:50,421 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:50,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:19:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:50,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-21 22:19:50,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:50,965 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:19:50,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126360437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:19:50,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:19:50,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 14 [2023-11-21 22:19:50,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180361491] [2023-11-21 22:19:50,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:19:50,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 22:19:50,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:50,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 22:19:50,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:19:51,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 67 [2023-11-21 22:19:51,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 132 transitions, 1033 flow. Second operand has 9 states, 9 states have (on average 28.77777777777778) internal successors, (259), 9 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:51,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:51,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 67 [2023-11-21 22:19:51,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:19:53,799 INFO L124 PetriNetUnfolderBase]: 5626/11821 cut-off events. [2023-11-21 22:19:53,799 INFO L125 PetriNetUnfolderBase]: For 20403/20403 co-relation queries the response was YES. [2023-11-21 22:19:53,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35810 conditions, 11821 events. 5626/11821 cut-off events. For 20403/20403 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 81296 event pairs, 970 based on Foata normal form. 406/12021 useless extension candidates. Maximal degree in co-relation 29371. Up to 3478 conditions per place. [2023-11-21 22:19:53,927 INFO L140 encePairwiseOnDemand]: 55/67 looper letters, 128 selfloop transitions, 67 changer transitions 0/210 dead transitions. [2023-11-21 22:19:53,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 210 transitions, 1736 flow [2023-11-21 22:19:53,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:19:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-21 22:19:53,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 403 transitions. [2023-11-21 22:19:53,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5468113975576662 [2023-11-21 22:19:53,931 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 403 transitions. [2023-11-21 22:19:53,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 403 transitions. [2023-11-21 22:19:53,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:19:53,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 403 transitions. [2023-11-21 22:19:53,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 36.63636363636363) internal successors, (403), 11 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:53,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 67.0) internal successors, (804), 12 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:53,936 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 67.0) internal successors, (804), 12 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:53,936 INFO L175 Difference]: Start difference. First operand has 130 places, 132 transitions, 1033 flow. Second operand 11 states and 403 transitions. [2023-11-21 22:19:53,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 210 transitions, 1736 flow [2023-11-21 22:19:54,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 210 transitions, 1696 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-11-21 22:19:54,157 INFO L231 Difference]: Finished difference. Result has 141 places, 136 transitions, 1289 flow [2023-11-21 22:19:54,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1289, PETRI_PLACES=141, PETRI_TRANSITIONS=136} [2023-11-21 22:19:54,157 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 79 predicate places. [2023-11-21 22:19:54,158 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 136 transitions, 1289 flow [2023-11-21 22:19:54,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 28.77777777777778) internal successors, (259), 9 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:54,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:19:54,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:19:54,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:19:54,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:54,376 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:19:54,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:19:54,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1332724177, now seen corresponding path program 1 times [2023-11-21 22:19:54,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:19:54,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689414947] [2023-11-21 22:19:54,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:54,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:19:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:54,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:19:54,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689414947] [2023-11-21 22:19:54,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689414947] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:19:54,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944660466] [2023-11-21 22:19:54,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:19:54,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:19:54,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:19:54,446 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:19:54,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:19:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:19:54,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:19:54,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:19:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:54,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:19:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:19:54,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944660466] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:19:54,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:19:54,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-21 22:19:54,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753814374] [2023-11-21 22:19:54,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:19:54,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:19:54,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:19:54,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:19:54,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:19:54,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 67 [2023-11-21 22:19:54,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 136 transitions, 1289 flow. Second operand has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:19:54,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:19:54,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 67 [2023-11-21 22:19:54,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:20:00,562 INFO L124 PetriNetUnfolderBase]: 14832/29225 cut-off events. [2023-11-21 22:20:00,563 INFO L125 PetriNetUnfolderBase]: For 73797/73928 co-relation queries the response was YES. [2023-11-21 22:20:00,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94745 conditions, 29225 events. 14832/29225 cut-off events. For 73797/73928 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 231294 event pairs, 1588 based on Foata normal form. 1977/30808 useless extension candidates. Maximal degree in co-relation 75255. Up to 7400 conditions per place. [2023-11-21 22:20:00,898 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 447 selfloop transitions, 6 changer transitions 0/472 dead transitions. [2023-11-21 22:20:00,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 472 transitions, 5857 flow [2023-11-21 22:20:00,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:20:00,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 22:20:00,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 284 transitions. [2023-11-21 22:20:00,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7064676616915423 [2023-11-21 22:20:00,901 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 284 transitions. [2023-11-21 22:20:00,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 284 transitions. [2023-11-21 22:20:00,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:20:00,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 284 transitions. [2023-11-21 22:20:00,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 47.333333333333336) internal successors, (284), 6 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:00,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:00,907 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 67.0) internal successors, (469), 7 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:00,907 INFO L175 Difference]: Start difference. First operand has 141 places, 136 transitions, 1289 flow. Second operand 6 states and 284 transitions. [2023-11-21 22:20:00,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 472 transitions, 5857 flow [2023-11-21 22:20:01,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 472 transitions, 5642 flow, removed 107 selfloop flow, removed 1 redundant places. [2023-11-21 22:20:01,185 INFO L231 Difference]: Finished difference. Result has 149 places, 139 transitions, 1274 flow [2023-11-21 22:20:01,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1274, PETRI_PLACES=149, PETRI_TRANSITIONS=139} [2023-11-21 22:20:01,186 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 87 predicate places. [2023-11-21 22:20:01,186 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 139 transitions, 1274 flow [2023-11-21 22:20:01,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:01,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:20:01,187 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:20:01,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:20:01,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57a78928-295e-4a80-a1be-9554a1289a70/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-21 22:20:01,417 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:20:01,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:20:01,418 INFO L85 PathProgramCache]: Analyzing trace with hash -941486547, now seen corresponding path program 1 times [2023-11-21 22:20:01,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:20:01,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485271475] [2023-11-21 22:20:01,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:20:01,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:20:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:20:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:20:02,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:20:02,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485271475] [2023-11-21 22:20:02,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485271475] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:20:02,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:20:02,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-21 22:20:02,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725161434] [2023-11-21 22:20:02,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:20:02,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:20:02,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:20:02,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:20:02,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:20:02,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 67 [2023-11-21 22:20:02,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 139 transitions, 1274 flow. Second operand has 10 states, 10 states have (on average 28.8) internal successors, (288), 10 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:20:02,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:20:02,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 67 [2023-11-21 22:20:02,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand