./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:37:53,472 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:37:53,613 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:37:53,621 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:37:53,622 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:37:53,663 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:37:53,664 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:37:53,665 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:37:53,666 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:37:53,672 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:37:53,674 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:37:53,674 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:37:53,675 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:37:53,677 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:37:53,678 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:37:53,678 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:37:53,679 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:37:53,679 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:37:53,680 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:37:53,680 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:37:53,681 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:37:53,682 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:37:53,682 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:37:53,683 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:37:53,683 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:37:53,684 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:37:53,685 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:37:53,685 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:37:53,686 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:37:53,686 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:37:53,688 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:37:53,688 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:37:53,689 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:37:53,689 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:37:53,690 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:37:53,690 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:37:53,691 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:37:53,691 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:37:53,691 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_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe [2023-11-06 22:37:54,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:37:54,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:37:54,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:37:54,124 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:37:54,125 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:37:54,127 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-11-06 22:37:57,538 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:37:57,952 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:37:57,953 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-11-06 22:37:57,973 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/data/9216c5c76/67984d5f356548f99368cd1f412e889c/FLAG187c03cc9 [2023-11-06 22:37:57,991 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/data/9216c5c76/67984d5f356548f99368cd1f412e889c [2023-11-06 22:37:57,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:37:57,995 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:37:58,001 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:37:58,001 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:37:58,008 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:37:58,009 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:57" (1/1) ... [2023-11-06 22:37:58,011 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@127f9917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:58, skipping insertion in model container [2023-11-06 22:37:58,012 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:57" (1/1) ... [2023-11-06 22:37:58,067 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:37:58,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:37:58,732 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:37:58,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:37:58,884 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:37:58,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:58 WrapperNode [2023-11-06 22:37:58,885 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:37:58,886 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:37:58,886 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:37:58,886 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:37:58,895 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:58" (1/1) ... [2023-11-06 22:37:58,920 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:58" (1/1) ... [2023-11-06 22:37:58,960 INFO L138 Inliner]: procedures = 270, calls = 42, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 201 [2023-11-06 22:37:58,961 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:37:58,962 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:37:58,962 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:37:58,962 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:37:58,980 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:58" (1/1) ... [2023-11-06 22:37:58,981 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:58" (1/1) ... [2023-11-06 22:37:58,989 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:58" (1/1) ... [2023-11-06 22:37:58,989 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:58" (1/1) ... [2023-11-06 22:37:59,014 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:58" (1/1) ... [2023-11-06 22:37:59,022 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:58" (1/1) ... [2023-11-06 22:37:59,025 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:58" (1/1) ... [2023-11-06 22:37:59,031 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:58" (1/1) ... [2023-11-06 22:37:59,039 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:37:59,041 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:37:59,041 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:37:59,041 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:37:59,043 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:58" (1/1) ... [2023-11-06 22:37:59,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:37:59,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:59,084 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:37:59,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:37:59,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:37:59,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:37:59,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:37:59,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:37:59,160 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:37:59,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:37:59,161 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 22:37:59,161 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 22:37:59,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:37:59,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:37:59,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:37:59,164 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:37:59,430 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:37:59,432 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:37:59,935 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:37:59,948 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:37:59,948 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-11-06 22:37:59,952 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:59 BoogieIcfgContainer [2023-11-06 22:37:59,952 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:37:59,955 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:37:59,956 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:37:59,960 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:37:59,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:37:57" (1/3) ... [2023-11-06 22:37:59,961 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c5caef0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:59, skipping insertion in model container [2023-11-06 22:37:59,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:58" (2/3) ... [2023-11-06 22:37:59,962 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c5caef0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:59, skipping insertion in model container [2023-11-06 22:37:59,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:59" (3/3) ... [2023-11-06 22:37:59,964 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2023-11-06 22:37:59,990 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:37:59,990 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-11-06 22:37:59,991 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:38:00,121 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 22:38:00,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 241 transitions, 489 flow [2023-11-06 22:38:00,333 INFO L124 PetriNetUnfolderBase]: 48/338 cut-off events. [2023-11-06 22:38:00,334 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:38:00,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 338 events. 48/338 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1285 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 192. Up to 8 conditions per place. [2023-11-06 22:38:00,345 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 241 transitions, 489 flow [2023-11-06 22:38:00,358 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 241 transitions, 489 flow [2023-11-06 22:38:00,363 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:38:00,376 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 241 transitions, 489 flow [2023-11-06 22:38:00,379 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 241 transitions, 489 flow [2023-11-06 22:38:00,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 241 transitions, 489 flow [2023-11-06 22:38:00,473 INFO L124 PetriNetUnfolderBase]: 48/338 cut-off events. [2023-11-06 22:38:00,473 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:38:00,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 338 events. 48/338 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1285 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 192. Up to 8 conditions per place. [2023-11-06 22:38:00,494 INFO L119 LiptonReduction]: Number of co-enabled transitions 18540 [2023-11-06 22:38:06,314 INFO L134 LiptonReduction]: Checked pairs total: 35947 [2023-11-06 22:38:06,314 INFO L136 LiptonReduction]: Total number of compositions: 233 [2023-11-06 22:38:06,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:38:06,356 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;@7ece0662, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:38:06,356 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-11-06 22:38:06,360 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:38:06,361 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2023-11-06 22:38:06,361 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:38:06,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:06,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:38:06,362 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-06 22:38:06,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:06,371 INFO L85 PathProgramCache]: Analyzing trace with hash 957958, now seen corresponding path program 1 times [2023-11-06 22:38:06,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:06,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661083983] [2023-11-06 22:38:06,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:06,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:06,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:06,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661083983] [2023-11-06 22:38:06,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661083983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:06,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:38:06,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:38:06,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641484552] [2023-11-06 22:38:06,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:06,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:38:06,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:06,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:38:06,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:38:06,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 474 [2023-11-06 22:38:06,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 94 transitions, 195 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:06,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:06,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 474 [2023-11-06 22:38:06,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:07,310 INFO L124 PetriNetUnfolderBase]: 603/1390 cut-off events. [2023-11-06 22:38:07,311 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:38:07,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2581 conditions, 1390 events. 603/1390 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8994 event pairs, 551 based on Foata normal form. 102/982 useless extension candidates. Maximal degree in co-relation 2499. Up to 1185 conditions per place. [2023-11-06 22:38:07,328 INFO L140 encePairwiseOnDemand]: 443/474 looper letters, 53 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-11-06 22:38:07,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 67 transitions, 251 flow [2023-11-06 22:38:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:38:07,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:38:07,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 690 transitions. [2023-11-06 22:38:07,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48523206751054854 [2023-11-06 22:38:07,355 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 690 transitions. [2023-11-06 22:38:07,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 690 transitions. [2023-11-06 22:38:07,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:07,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 690 transitions. [2023-11-06 22:38:07,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:07,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:07,383 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:07,386 INFO L175 Difference]: Start difference. First operand has 71 places, 94 transitions, 195 flow. Second operand 3 states and 690 transitions. [2023-11-06 22:38:07,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 67 transitions, 251 flow [2023-11-06 22:38:07,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 251 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:38:07,394 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 151 flow [2023-11-06 22:38:07,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2023-11-06 22:38:07,401 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-11-06 22:38:07,401 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 151 flow [2023-11-06 22:38:07,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:07,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:07,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:38:07,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:38:07,404 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-06 22:38:07,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:07,414 INFO L85 PathProgramCache]: Analyzing trace with hash 29672638, now seen corresponding path program 1 times [2023-11-06 22:38:07,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:07,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907566006] [2023-11-06 22:38:07,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:07,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:07,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:07,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:07,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907566006] [2023-11-06 22:38:07,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907566006] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:07,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125903138] [2023-11-06 22:38:07,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:07,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:07,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:07,569 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:07,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:38:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:07,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:38:07,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:07,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:07,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125903138] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:07,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:07,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-06 22:38:07,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736163973] [2023-11-06 22:38:07,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:07,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:38:07,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:07,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:38:07,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:38:07,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 474 [2023-11-06 22:38:07,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 151 flow. Second operand has 6 states, 6 states have (on average 202.16666666666666) internal successors, (1213), 6 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:07,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:07,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 474 [2023-11-06 22:38:07,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:08,203 INFO L124 PetriNetUnfolderBase]: 603/1393 cut-off events. [2023-11-06 22:38:08,203 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:38:08,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2597 conditions, 1393 events. 603/1393 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9013 event pairs, 551 based on Foata normal form. 0/883 useless extension candidates. Maximal degree in co-relation 2585. Up to 1185 conditions per place. [2023-11-06 22:38:08,217 INFO L140 encePairwiseOnDemand]: 471/474 looper letters, 53 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2023-11-06 22:38:08,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 279 flow [2023-11-06 22:38:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:38:08,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:38:08,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1267 transitions. [2023-11-06 22:38:08,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44549929676511957 [2023-11-06 22:38:08,224 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1267 transitions. [2023-11-06 22:38:08,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1267 transitions. [2023-11-06 22:38:08,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:08,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1267 transitions. [2023-11-06 22:38:08,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 211.16666666666666) internal successors, (1267), 6 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:08,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 474.0) internal successors, (3318), 7 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:08,243 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 474.0) internal successors, (3318), 7 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:08,243 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 151 flow. Second operand 6 states and 1267 transitions. [2023-11-06 22:38:08,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 70 transitions, 279 flow [2023-11-06 22:38:08,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 70 transitions, 275 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:38:08,248 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 183 flow [2023-11-06 22:38:08,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2023-11-06 22:38:08,250 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2023-11-06 22:38:08,250 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 183 flow [2023-11-06 22:38:08,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 202.16666666666666) internal successors, (1213), 6 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:08,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:08,252 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-06 22:38:08,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:08,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:08,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-06 22:38:08,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:08,467 INFO L85 PathProgramCache]: Analyzing trace with hash -809595898, now seen corresponding path program 2 times [2023-11-06 22:38:08,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:08,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997573170] [2023-11-06 22:38:08,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:08,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:38:08,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:08,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997573170] [2023-11-06 22:38:08,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997573170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:08,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:38:08,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:38:08,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702510366] [2023-11-06 22:38:08,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:08,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:38:08,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:08,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:38:08,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:38:08,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 474 [2023-11-06 22:38:08,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:08,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:08,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 474 [2023-11-06 22:38:08,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:09,048 INFO L124 PetriNetUnfolderBase]: 561/1294 cut-off events. [2023-11-06 22:38:09,049 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:38:09,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2431 conditions, 1294 events. 561/1294 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8280 event pairs, 475 based on Foata normal form. 0/842 useless extension candidates. Maximal degree in co-relation 2397. Up to 1022 conditions per place. [2023-11-06 22:38:09,060 INFO L140 encePairwiseOnDemand]: 469/474 looper letters, 72 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2023-11-06 22:38:09,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 87 transitions, 367 flow [2023-11-06 22:38:09,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:38:09,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:38:09,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 670 transitions. [2023-11-06 22:38:09,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4711673699015471 [2023-11-06 22:38:09,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 670 transitions. [2023-11-06 22:38:09,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 670 transitions. [2023-11-06 22:38:09,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:09,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 670 transitions. [2023-11-06 22:38:09,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 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) [2023-11-06 22:38:09,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:09,075 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:09,076 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 183 flow. Second operand 3 states and 670 transitions. [2023-11-06 22:38:09,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 87 transitions, 367 flow [2023-11-06 22:38:09,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 87 transitions, 353 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 22:38:09,080 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 171 flow [2023-11-06 22:38:09,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2023-11-06 22:38:09,082 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-11-06 22:38:09,082 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 171 flow [2023-11-06 22:38:09,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:09,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:09,084 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-06 22:38:09,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:38:09,084 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-06 22:38:09,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:09,085 INFO L85 PathProgramCache]: Analyzing trace with hash -809595899, now seen corresponding path program 1 times [2023-11-06 22:38:09,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:09,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872920899] [2023-11-06 22:38:09,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:09,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:09,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:09,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872920899] [2023-11-06 22:38:09,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872920899] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:09,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854912863] [2023-11-06 22:38:09,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:09,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:09,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:09,196 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:09,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:38:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:09,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:38:09,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:09,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:09,390 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:09,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854912863] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:09,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:09,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-06 22:38:09,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492907408] [2023-11-06 22:38:09,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:09,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:38:09,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:09,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:38:09,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:38:09,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 474 [2023-11-06 22:38:09,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 171 flow. Second operand has 12 states, 12 states have (on average 202.08333333333334) internal successors, (2425), 12 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:09,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:09,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 474 [2023-11-06 22:38:09,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:09,755 INFO L124 PetriNetUnfolderBase]: 563/1308 cut-off events. [2023-11-06 22:38:09,755 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2023-11-06 22:38:09,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2500 conditions, 1308 events. 563/1308 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8287 event pairs, 513 based on Foata normal form. 6/882 useless extension candidates. Maximal degree in co-relation 2448. Up to 1105 conditions per place. [2023-11-06 22:38:09,767 INFO L140 encePairwiseOnDemand]: 471/474 looper letters, 51 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2023-11-06 22:38:09,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 74 transitions, 331 flow [2023-11-06 22:38:09,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:38:09,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:38:09,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2480 transitions. [2023-11-06 22:38:09,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4360056258790436 [2023-11-06 22:38:09,778 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2480 transitions. [2023-11-06 22:38:09,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2480 transitions. [2023-11-06 22:38:09,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:09,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2480 transitions. [2023-11-06 22:38:09,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 206.66666666666666) internal successors, (2480), 12 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:09,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 474.0) internal successors, (6162), 13 states have internal predecessors, (6162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:09,809 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 474.0) internal successors, (6162), 13 states have internal predecessors, (6162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:09,810 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 171 flow. Second operand 12 states and 2480 transitions. [2023-11-06 22:38:09,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 74 transitions, 331 flow [2023-11-06 22:38:09,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 74 transitions, 325 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:38:09,818 INFO L231 Difference]: Finished difference. Result has 89 places, 74 transitions, 249 flow [2023-11-06 22:38:09,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=249, PETRI_PLACES=89, PETRI_TRANSITIONS=74} [2023-11-06 22:38:09,824 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 18 predicate places. [2023-11-06 22:38:09,824 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 249 flow [2023-11-06 22:38:09,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 202.08333333333334) internal successors, (2425), 12 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:09,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:09,826 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-06 22:38:09,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:10,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:10,045 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-06 22:38:10,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:10,045 INFO L85 PathProgramCache]: Analyzing trace with hash -171618043, now seen corresponding path program 2 times [2023-11-06 22:38:10,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:10,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771175172] [2023-11-06 22:38:10,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:10,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:38:10,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:10,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771175172] [2023-11-06 22:38:10,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771175172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:10,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:38:10,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:38:10,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081261597] [2023-11-06 22:38:10,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:10,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:38:10,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:10,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:38:10,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:38:10,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 474 [2023-11-06 22:38:10,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 74 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:10,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:10,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 474 [2023-11-06 22:38:10,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:10,648 INFO L124 PetriNetUnfolderBase]: 535/1200 cut-off events. [2023-11-06 22:38:10,648 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-06 22:38:10,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2358 conditions, 1200 events. 535/1200 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7686 event pairs, 0 based on Foata normal form. 0/788 useless extension candidates. Maximal degree in co-relation 2282. Up to 1072 conditions per place. [2023-11-06 22:38:10,660 INFO L140 encePairwiseOnDemand]: 470/474 looper letters, 80 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-11-06 22:38:10,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 453 flow [2023-11-06 22:38:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:38:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:38:10,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2023-11-06 22:38:10,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4760900140646976 [2023-11-06 22:38:10,664 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2023-11-06 22:38:10,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2023-11-06 22:38:10,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:10,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2023-11-06 22:38:10,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:10,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:10,672 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:10,672 INFO L175 Difference]: Start difference. First operand has 89 places, 74 transitions, 249 flow. Second operand 3 states and 677 transitions. [2023-11-06 22:38:10,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 453 flow [2023-11-06 22:38:10,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 94 transitions, 405 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-06 22:38:10,686 INFO L231 Difference]: Finished difference. Result has 87 places, 74 transitions, 211 flow [2023-11-06 22:38:10,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=87, PETRI_TRANSITIONS=74} [2023-11-06 22:38:10,687 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2023-11-06 22:38:10,688 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 74 transitions, 211 flow [2023-11-06 22:38:10,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:10,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:10,688 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:10,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:38:10,689 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-06 22:38:10,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:10,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1661361567, now seen corresponding path program 1 times [2023-11-06 22:38:10,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:10,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105878925] [2023-11-06 22:38:10,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:10,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:38:10,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:10,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105878925] [2023-11-06 22:38:10,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105878925] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:10,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520455640] [2023-11-06 22:38:10,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:10,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:10,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:10,954 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:10,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:38:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:11,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:38:11,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:11,125 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:38:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:38:11,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:38:11,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520455640] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:11,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:11,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:38:11,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653812686] [2023-11-06 22:38:11,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:11,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:38:11,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:11,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:38:11,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:38:11,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 474 [2023-11-06 22:38:11,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 74 transitions, 211 flow. Second operand has 7 states, 7 states have (on average 200.0) internal successors, (1400), 7 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:11,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:11,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 474 [2023-11-06 22:38:11,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:11,731 INFO L124 PetriNetUnfolderBase]: 42/139 cut-off events. [2023-11-06 22:38:11,732 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2023-11-06 22:38:11,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 139 events. 42/139 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 495 event pairs, 10 based on Foata normal form. 20/138 useless extension candidates. Maximal degree in co-relation 280. Up to 78 conditions per place. [2023-11-06 22:38:11,734 INFO L140 encePairwiseOnDemand]: 470/474 looper letters, 53 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-11-06 22:38:11,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 292 flow [2023-11-06 22:38:11,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:38:11,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:38:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 839 transitions. [2023-11-06 22:38:11,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44251054852320676 [2023-11-06 22:38:11,739 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 839 transitions. [2023-11-06 22:38:11,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 839 transitions. [2023-11-06 22:38:11,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:11,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 839 transitions. [2023-11-06 22:38:11,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:11,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:11,750 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:11,750 INFO L175 Difference]: Start difference. First operand has 87 places, 74 transitions, 211 flow. Second operand 4 states and 839 transitions. [2023-11-06 22:38:11,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 292 flow [2023-11-06 22:38:11,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 286 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:38:11,754 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 140 flow [2023-11-06 22:38:11,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2023-11-06 22:38:11,759 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -13 predicate places. [2023-11-06 22:38:11,759 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 140 flow [2023-11-06 22:38:11,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 200.0) internal successors, (1400), 7 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:11,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:11,761 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-06 22:38:11,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:11,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:11,971 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-06 22:38:11,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:11,972 INFO L85 PathProgramCache]: Analyzing trace with hash 37399647, now seen corresponding path program 1 times [2023-11-06 22:38:11,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:11,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662727365] [2023-11-06 22:38:11,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:11,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:38:12,012 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:38:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:38:12,074 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:38:12,074 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:38:12,075 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2023-11-06 22:38:12,079 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2023-11-06 22:38:12,079 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2023-11-06 22:38:12,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2023-11-06 22:38:12,082 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2023-11-06 22:38:12,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2023-11-06 22:38:12,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2023-11-06 22:38:12,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2023-11-06 22:38:12,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2023-11-06 22:38:12,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (29 of 39 remaining) [2023-11-06 22:38:12,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2023-11-06 22:38:12,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2023-11-06 22:38:12,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2023-11-06 22:38:12,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2023-11-06 22:38:12,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2023-11-06 22:38:12,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2023-11-06 22:38:12,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2023-11-06 22:38:12,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2023-11-06 22:38:12,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2023-11-06 22:38:12,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2023-11-06 22:38:12,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2023-11-06 22:38:12,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2023-11-06 22:38:12,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2023-11-06 22:38:12,092 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2023-11-06 22:38:12,092 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2023-11-06 22:38:12,092 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2023-11-06 22:38:12,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2023-11-06 22:38:12,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2023-11-06 22:38:12,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2023-11-06 22:38:12,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2023-11-06 22:38:12,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2023-11-06 22:38:12,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2023-11-06 22:38:12,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2023-11-06 22:38:12,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2023-11-06 22:38:12,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2023-11-06 22:38:12,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2023-11-06 22:38:12,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2023-11-06 22:38:12,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2023-11-06 22:38:12,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2023-11-06 22:38:12,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:38:12,102 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2023-11-06 22:38:12,105 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:38:12,105 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:38:12,184 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:38:12,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 333 transitions, 682 flow [2023-11-06 22:38:12,291 INFO L124 PetriNetUnfolderBase]: 80/558 cut-off events. [2023-11-06 22:38:12,291 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-06 22:38:12,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 558 events. 80/558 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2595 event pairs, 0 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 340. Up to 12 conditions per place. [2023-11-06 22:38:12,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 333 transitions, 682 flow [2023-11-06 22:38:12,306 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 333 transitions, 682 flow [2023-11-06 22:38:12,307 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:38:12,307 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 333 transitions, 682 flow [2023-11-06 22:38:12,307 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 333 transitions, 682 flow [2023-11-06 22:38:12,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 333 transitions, 682 flow [2023-11-06 22:38:12,411 INFO L124 PetriNetUnfolderBase]: 80/558 cut-off events. [2023-11-06 22:38:12,411 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-06 22:38:12,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 558 events. 80/558 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2595 event pairs, 0 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 340. Up to 12 conditions per place. [2023-11-06 22:38:12,455 INFO L119 LiptonReduction]: Number of co-enabled transitions 55260 [2023-11-06 22:38:19,800 INFO L134 LiptonReduction]: Checked pairs total: 111995 [2023-11-06 22:38:19,800 INFO L136 LiptonReduction]: Total number of compositions: 314 [2023-11-06 22:38:19,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:38:19,805 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;@7ece0662, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:38:19,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-11-06 22:38:19,807 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:38:19,807 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-06 22:38:19,807 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:38:19,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:19,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:38:19,808 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:38:19,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:19,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1690682, now seen corresponding path program 1 times [2023-11-06 22:38:19,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:19,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403287789] [2023-11-06 22:38:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:19,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:19,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:19,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403287789] [2023-11-06 22:38:19,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403287789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:19,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:38:19,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:38:19,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601760026] [2023-11-06 22:38:19,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:19,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:38:19,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:19,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:38:19,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:38:19,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 647 [2023-11-06 22:38:19,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 136 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:19,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:19,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 647 [2023-11-06 22:38:19,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:25,759 INFO L124 PetriNetUnfolderBase]: 24474/40794 cut-off events. [2023-11-06 22:38:25,759 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2023-11-06 22:38:25,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76840 conditions, 40794 events. 24474/40794 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 1748. Compared 351384 event pairs, 23123 based on Foata normal form. 3318/30753 useless extension candidates. Maximal degree in co-relation 32720. Up to 35938 conditions per place. [2023-11-06 22:38:26,170 INFO L140 encePairwiseOnDemand]: 604/647 looper letters, 74 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2023-11-06 22:38:26,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 362 flow [2023-11-06 22:38:26,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:38:26,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:38:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 951 transitions. [2023-11-06 22:38:26,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4899536321483771 [2023-11-06 22:38:26,180 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 951 transitions. [2023-11-06 22:38:26,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 951 transitions. [2023-11-06 22:38:26,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:26,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 951 transitions. [2023-11-06 22:38:26,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:26,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 647.0) internal successors, (2588), 4 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:26,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 647.0) internal successors, (2588), 4 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:26,195 INFO L175 Difference]: Start difference. First operand has 103 places, 136 transitions, 288 flow. Second operand 3 states and 951 transitions. [2023-11-06 22:38:26,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 362 flow [2023-11-06 22:38:26,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 97 transitions, 362 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:38:26,205 INFO L231 Difference]: Finished difference. Result has 98 places, 97 transitions, 220 flow [2023-11-06 22:38:26,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=647, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=98, PETRI_TRANSITIONS=97} [2023-11-06 22:38:26,208 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-11-06 22:38:26,208 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 97 transitions, 220 flow [2023-11-06 22:38:26,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:26,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:26,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:38:26,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:38:26,211 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:38:26,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:26,211 INFO L85 PathProgramCache]: Analyzing trace with hash 52363251, now seen corresponding path program 1 times [2023-11-06 22:38:26,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:26,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328954135] [2023-11-06 22:38:26,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:26,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:26,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:26,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328954135] [2023-11-06 22:38:26,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328954135] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:26,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274934894] [2023-11-06 22:38:26,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:26,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:26,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:26,265 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:26,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:38:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:26,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:38:26,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:26,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:26,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274934894] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:26,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:26,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:38:26,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845822389] [2023-11-06 22:38:26,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:26,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:38:26,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:26,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:38:26,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:38:26,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 647 [2023-11-06 22:38:26,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 220 flow. Second operand has 7 states, 7 states have (on average 278.2857142857143) internal successors, (1948), 7 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:26,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:26,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 647 [2023-11-06 22:38:26,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:31,521 INFO L124 PetriNetUnfolderBase]: 24474/40797 cut-off events. [2023-11-06 22:38:31,521 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2023-11-06 22:38:31,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76856 conditions, 40797 events. 24474/40797 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 1748. Compared 351368 event pairs, 23123 based on Foata normal form. 0/27438 useless extension candidates. Maximal degree in co-relation 76843. Up to 35938 conditions per place. [2023-11-06 22:38:31,839 INFO L140 encePairwiseOnDemand]: 644/647 looper letters, 74 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2023-11-06 22:38:31,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 390 flow [2023-11-06 22:38:31,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:38:31,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:38:31,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1744 transitions. [2023-11-06 22:38:31,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44925296239052037 [2023-11-06 22:38:31,848 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1744 transitions. [2023-11-06 22:38:31,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1744 transitions. [2023-11-06 22:38:31,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:31,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1744 transitions. [2023-11-06 22:38:31,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 290.6666666666667) internal successors, (1744), 6 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:31,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 647.0) internal successors, (4529), 7 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:31,867 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 647.0) internal successors, (4529), 7 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:31,867 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 220 flow. Second operand 6 states and 1744 transitions. [2023-11-06 22:38:31,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 390 flow [2023-11-06 22:38:31,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 100 transitions, 386 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:38:31,873 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 252 flow [2023-11-06 22:38:31,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=647, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2023-11-06 22:38:31,876 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 2 predicate places. [2023-11-06 22:38:31,876 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 252 flow [2023-11-06 22:38:31,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 278.2857142857143) internal successors, (1948), 7 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:31,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:31,878 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-06 22:38:31,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:32,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:32,086 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:38:32,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:32,086 INFO L85 PathProgramCache]: Analyzing trace with hash 832926330, now seen corresponding path program 2 times [2023-11-06 22:38:32,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:32,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799613892] [2023-11-06 22:38:32,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:32,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:32,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:32,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799613892] [2023-11-06 22:38:32,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799613892] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:32,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042794879] [2023-11-06 22:38:32,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:38:32,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:32,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:32,175 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:32,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:38:32,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:38:32,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:32,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:38:32,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:32,291 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:38:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:38:32,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:38:32,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042794879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:32,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:38:32,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-11-06 22:38:32,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51248120] [2023-11-06 22:38:32,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:32,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:38:32,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:32,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:38:32,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:38:32,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 647 [2023-11-06 22:38:32,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:32,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:32,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 647 [2023-11-06 22:38:32,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:37,113 INFO L124 PetriNetUnfolderBase]: 24126/39749 cut-off events. [2023-11-06 22:38:37,113 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2023-11-06 22:38:37,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75800 conditions, 39749 events. 24126/39749 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 1719. Compared 338913 event pairs, 11153 based on Foata normal form. 0/26802 useless extension candidates. Maximal degree in co-relation 75765. Up to 35898 conditions per place. [2023-11-06 22:38:37,435 INFO L140 encePairwiseOnDemand]: 643/647 looper letters, 99 selfloop transitions, 2 changer transitions 0/122 dead transitions. [2023-11-06 22:38:37,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 122 transitions, 498 flow [2023-11-06 22:38:37,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:38:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:38:37,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 930 transitions. [2023-11-06 22:38:37,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47913446676970634 [2023-11-06 22:38:37,442 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 930 transitions. [2023-11-06 22:38:37,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 930 transitions. [2023-11-06 22:38:37,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:37,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 930 transitions. [2023-11-06 22:38:37,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 310.0) internal successors, (930), 3 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:37,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 647.0) internal successors, (2588), 4 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:37,469 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 647.0) internal successors, (2588), 4 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:37,479 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 252 flow. Second operand 3 states and 930 transitions. [2023-11-06 22:38:37,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 122 transitions, 498 flow [2023-11-06 22:38:37,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 122 transitions, 484 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 22:38:37,485 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 252 flow [2023-11-06 22:38:37,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=647, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2023-11-06 22:38:37,486 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 4 predicate places. [2023-11-06 22:38:37,487 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 252 flow [2023-11-06 22:38:37,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:37,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:37,489 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-06 22:38:37,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:37,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:38:37,696 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:38:37,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:37,696 INFO L85 PathProgramCache]: Analyzing trace with hash 832926332, now seen corresponding path program 1 times [2023-11-06 22:38:37,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:37,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006139108] [2023-11-06 22:38:37,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:37,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:38:37,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:37,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006139108] [2023-11-06 22:38:37,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006139108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:37,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:38:37,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:38:37,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125299608] [2023-11-06 22:38:37,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:37,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:38:37,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:37,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:38:37,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:38:37,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 647 [2023-11-06 22:38:37,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:37,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:37,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 647 [2023-11-06 22:38:37,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:42,099 INFO L124 PetriNetUnfolderBase]: 22852/37387 cut-off events. [2023-11-06 22:38:42,100 INFO L125 PetriNetUnfolderBase]: For 973/973 co-relation queries the response was YES. [2023-11-06 22:38:42,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72275 conditions, 37387 events. 22852/37387 cut-off events. For 973/973 co-relation queries the response was YES. Maximal size of possible extension queue 1610. Compared 312571 event pairs, 19950 based on Foata normal form. 0/25892 useless extension candidates. Maximal degree in co-relation 72245. Up to 30997 conditions per place. [2023-11-06 22:38:42,367 INFO L140 encePairwiseOnDemand]: 642/647 looper letters, 113 selfloop transitions, 3 changer transitions 0/137 dead transitions. [2023-11-06 22:38:42,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 137 transitions, 556 flow [2023-11-06 22:38:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:38:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:38:42,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 938 transitions. [2023-11-06 22:38:42,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48325605358062856 [2023-11-06 22:38:42,373 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 938 transitions. [2023-11-06 22:38:42,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 938 transitions. [2023-11-06 22:38:42,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:42,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 938 transitions. [2023-11-06 22:38:42,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:42,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 647.0) internal successors, (2588), 4 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:42,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 647.0) internal successors, (2588), 4 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:42,384 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 252 flow. Second operand 3 states and 938 transitions. [2023-11-06 22:38:42,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 137 transitions, 556 flow [2023-11-06 22:38:42,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 137 transitions, 554 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:38:42,391 INFO L231 Difference]: Finished difference. Result has 106 places, 99 transitions, 252 flow [2023-11-06 22:38:42,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=647, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=106, PETRI_TRANSITIONS=99} [2023-11-06 22:38:42,392 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 3 predicate places. [2023-11-06 22:38:42,392 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 99 transitions, 252 flow [2023-11-06 22:38:42,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:42,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:42,393 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:42,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:38:42,394 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:38:42,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:42,394 INFO L85 PathProgramCache]: Analyzing trace with hash 651943038, now seen corresponding path program 1 times [2023-11-06 22:38:42,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:42,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005553643] [2023-11-06 22:38:42,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:42,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:38:42,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:42,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005553643] [2023-11-06 22:38:42,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005553643] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:42,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000073079] [2023-11-06 22:38:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:42,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:42,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:42,485 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:42,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:38:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:42,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:38:42,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:38:42,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:38:42,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000073079] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:42,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:42,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:38:42,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040472293] [2023-11-06 22:38:42,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:42,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:38:42,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:42,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:38:42,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:38:42,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 647 [2023-11-06 22:38:42,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 99 transitions, 252 flow. Second operand has 13 states, 13 states have (on average 278.38461538461536) internal successors, (3619), 13 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:42,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:42,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 647 [2023-11-06 22:38:42,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:47,009 INFO L124 PetriNetUnfolderBase]: 22924/37545 cut-off events. [2023-11-06 22:38:47,010 INFO L125 PetriNetUnfolderBase]: For 1288/1288 co-relation queries the response was YES. [2023-11-06 22:38:47,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73314 conditions, 37545 events. 22924/37545 cut-off events. For 1288/1288 co-relation queries the response was YES. Maximal size of possible extension queue 1610. Compared 313339 event pairs, 21546 based on Foata normal form. 6/26486 useless extension candidates. Maximal degree in co-relation 73260. Up to 33478 conditions per place. [2023-11-06 22:38:47,274 INFO L140 encePairwiseOnDemand]: 644/647 looper letters, 73 selfloop transitions, 11 changer transitions 0/105 dead transitions. [2023-11-06 22:38:47,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 105 transitions, 456 flow [2023-11-06 22:38:47,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:38:47,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:38:47,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3413 transitions. [2023-11-06 22:38:47,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395929933024214 [2023-11-06 22:38:47,290 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3413 transitions. [2023-11-06 22:38:47,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3413 transitions. [2023-11-06 22:38:47,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:47,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3413 transitions. [2023-11-06 22:38:47,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 284.4166666666667) internal successors, (3413), 12 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:47,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 647.0) internal successors, (8411), 13 states have internal predecessors, (8411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:47,320 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 647.0) internal successors, (8411), 13 states have internal predecessors, (8411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:47,320 INFO L175 Difference]: Start difference. First operand has 106 places, 99 transitions, 252 flow. Second operand 12 states and 3413 transitions. [2023-11-06 22:38:47,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 105 transitions, 456 flow [2023-11-06 22:38:47,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 105 transitions, 450 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:38:47,390 INFO L231 Difference]: Finished difference. Result has 121 places, 105 transitions, 330 flow [2023-11-06 22:38:47,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=647, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=330, PETRI_PLACES=121, PETRI_TRANSITIONS=105} [2023-11-06 22:38:47,391 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 18 predicate places. [2023-11-06 22:38:47,392 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 105 transitions, 330 flow [2023-11-06 22:38:47,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 278.38461538461536) internal successors, (3619), 13 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:47,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:47,393 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:47,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:47,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:38:47,602 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:38:47,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:47,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1586104798, now seen corresponding path program 2 times [2023-11-06 22:38:47,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:47,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256554730] [2023-11-06 22:38:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:47,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:38:47,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:47,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256554730] [2023-11-06 22:38:47,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256554730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:47,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112394543] [2023-11-06 22:38:47,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:38:47,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:47,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:47,765 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:47,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:38:47,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:38:47,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:47,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:38:47,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:47,924 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:38:47,977 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:38:47,977 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:38:47,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112394543] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:47,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:38:47,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 22:38:47,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377908445] [2023-11-06 22:38:47,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:47,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:38:47,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:47,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:38:47,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:38:48,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 647 [2023-11-06 22:38:48,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 105 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 277.75) internal successors, (1111), 4 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:48,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:48,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 647 [2023-11-06 22:38:48,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:52,190 INFO L124 PetriNetUnfolderBase]: 21270/34477 cut-off events. [2023-11-06 22:38:52,190 INFO L125 PetriNetUnfolderBase]: For 921/921 co-relation queries the response was YES. [2023-11-06 22:38:52,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67774 conditions, 34477 events. 21270/34477 cut-off events. For 921/921 co-relation queries the response was YES. Maximal size of possible extension queue 1448. Compared 292615 event pairs, 760 based on Foata normal form. 0/24075 useless extension candidates. Maximal degree in co-relation 67696. Up to 29089 conditions per place. [2023-11-06 22:38:52,448 INFO L140 encePairwiseOnDemand]: 643/647 looper letters, 138 selfloop transitions, 3 changer transitions 0/162 dead transitions. [2023-11-06 22:38:52,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 162 transitions, 724 flow [2023-11-06 22:38:52,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:38:52,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:38:52,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1236 transitions. [2023-11-06 22:38:52,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775888717156105 [2023-11-06 22:38:52,453 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1236 transitions. [2023-11-06 22:38:52,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1236 transitions. [2023-11-06 22:38:52,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:52,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1236 transitions. [2023-11-06 22:38:52,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:52,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 647.0) internal successors, (3235), 5 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:52,464 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 647.0) internal successors, (3235), 5 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:52,464 INFO L175 Difference]: Start difference. First operand has 121 places, 105 transitions, 330 flow. Second operand 4 states and 1236 transitions. [2023-11-06 22:38:52,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 162 transitions, 724 flow [2023-11-06 22:38:52,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 162 transitions, 676 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-06 22:38:52,470 INFO L231 Difference]: Finished difference. Result has 118 places, 104 transitions, 284 flow [2023-11-06 22:38:52,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=647, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=118, PETRI_TRANSITIONS=104} [2023-11-06 22:38:52,471 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 15 predicate places. [2023-11-06 22:38:52,472 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 104 transitions, 284 flow [2023-11-06 22:38:52,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 277.75) internal successors, (1111), 4 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:52,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:52,473 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:52,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:52,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:38:52,679 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:38:52,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:52,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1586718579, now seen corresponding path program 1 times [2023-11-06 22:38:52,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:52,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176855026] [2023-11-06 22:38:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:52,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:38:52,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:52,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176855026] [2023-11-06 22:38:52,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176855026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:52,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:38:52,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:38:52,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23018165] [2023-11-06 22:38:52,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:52,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:38:52,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:52,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:38:52,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:38:53,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 647 [2023-11-06 22:38:53,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 104 transitions, 284 flow. Second operand has 6 states, 6 states have (on average 255.33333333333334) internal successors, (1532), 6 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:53,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:53,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 647 [2023-11-06 22:38:53,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:38:56,359 INFO L124 PetriNetUnfolderBase]: 13536/22269 cut-off events. [2023-11-06 22:38:56,359 INFO L125 PetriNetUnfolderBase]: For 1399/1399 co-relation queries the response was YES. [2023-11-06 22:38:56,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43712 conditions, 22269 events. 13536/22269 cut-off events. For 1399/1399 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 178167 event pairs, 378 based on Foata normal form. 962/18637 useless extension candidates. Maximal degree in co-relation 43658. Up to 17793 conditions per place. [2023-11-06 22:38:56,551 INFO L140 encePairwiseOnDemand]: 626/647 looper letters, 161 selfloop transitions, 8 changer transitions 0/183 dead transitions. [2023-11-06 22:38:56,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 183 transitions, 798 flow [2023-11-06 22:38:56,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:38:56,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:38:56,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1723 transitions. [2023-11-06 22:38:56,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.443843379701185 [2023-11-06 22:38:56,559 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1723 transitions. [2023-11-06 22:38:56,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1723 transitions. [2023-11-06 22:38:56,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:38:56,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1723 transitions. [2023-11-06 22:38:56,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 287.1666666666667) internal successors, (1723), 6 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:56,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 647.0) internal successors, (4529), 7 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:56,574 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 647.0) internal successors, (4529), 7 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:56,574 INFO L175 Difference]: Start difference. First operand has 118 places, 104 transitions, 284 flow. Second operand 6 states and 1723 transitions. [2023-11-06 22:38:56,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 183 transitions, 798 flow [2023-11-06 22:38:56,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 183 transitions, 792 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:38:56,582 INFO L231 Difference]: Finished difference. Result has 105 places, 91 transitions, 270 flow [2023-11-06 22:38:56,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=647, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=105, PETRI_TRANSITIONS=91} [2023-11-06 22:38:56,583 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 2 predicate places. [2023-11-06 22:38:56,584 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 91 transitions, 270 flow [2023-11-06 22:38:56,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 255.33333333333334) internal successors, (1532), 6 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:56,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:38:56,585 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:56,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 22:38:56,585 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:38:56,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:56,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1943627293, now seen corresponding path program 1 times [2023-11-06 22:38:56,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:56,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175038672] [2023-11-06 22:38:56,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:56,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:38:56,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:56,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175038672] [2023-11-06 22:38:56,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175038672] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:38:56,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:38:56,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:38:56,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808869725] [2023-11-06 22:38:56,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:38:56,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:38:56,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:56,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:38:56,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:38:57,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 647 [2023-11-06 22:38:57,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 91 transitions, 270 flow. Second operand has 6 states, 6 states have (on average 252.33333333333334) internal successors, (1514), 6 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:38:57,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:38:57,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 647 [2023-11-06 22:38:57,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:00,692 INFO L124 PetriNetUnfolderBase]: 16148/26051 cut-off events. [2023-11-06 22:39:00,692 INFO L125 PetriNetUnfolderBase]: For 2243/2243 co-relation queries the response was YES. [2023-11-06 22:39:00,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53161 conditions, 26051 events. 16148/26051 cut-off events. For 2243/2243 co-relation queries the response was YES. Maximal size of possible extension queue 1023. Compared 198348 event pairs, 5268 based on Foata normal form. 0/21287 useless extension candidates. Maximal degree in co-relation 53106. Up to 16852 conditions per place. [2023-11-06 22:39:00,840 INFO L140 encePairwiseOnDemand]: 633/647 looper letters, 170 selfloop transitions, 17 changer transitions 0/201 dead transitions. [2023-11-06 22:39:00,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 201 transitions, 910 flow [2023-11-06 22:39:00,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:39:00,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:39:00,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1430 transitions. [2023-11-06 22:39:00,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420401854714065 [2023-11-06 22:39:00,848 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1430 transitions. [2023-11-06 22:39:00,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1430 transitions. [2023-11-06 22:39:00,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:00,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1430 transitions. [2023-11-06 22:39:00,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 286.0) internal successors, (1430), 5 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:00,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 647.0) internal successors, (3882), 6 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:00,861 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 647.0) internal successors, (3882), 6 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:00,861 INFO L175 Difference]: Start difference. First operand has 105 places, 91 transitions, 270 flow. Second operand 5 states and 1430 transitions. [2023-11-06 22:39:00,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 201 transitions, 910 flow [2023-11-06 22:39:00,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 201 transitions, 909 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:39:00,877 INFO L231 Difference]: Finished difference. Result has 112 places, 106 transitions, 407 flow [2023-11-06 22:39:00,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=647, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=407, PETRI_PLACES=112, PETRI_TRANSITIONS=106} [2023-11-06 22:39:00,879 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 9 predicate places. [2023-11-06 22:39:00,879 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 106 transitions, 407 flow [2023-11-06 22:39:00,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 252.33333333333334) internal successors, (1514), 6 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:00,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:00,880 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:00,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 22:39:00,881 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:39:00,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:00,881 INFO L85 PathProgramCache]: Analyzing trace with hash -466620578, now seen corresponding path program 1 times [2023-11-06 22:39:00,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:00,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581945021] [2023-11-06 22:39:00,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:00,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:00,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:39:00,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:00,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581945021] [2023-11-06 22:39:00,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581945021] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:00,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2611672] [2023-11-06 22:39:00,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:00,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:00,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:00,949 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:00,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:39:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:01,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:39:01,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:39:01,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:39:01,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2611672] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:01,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:01,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-06 22:39:01,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109169761] [2023-11-06 22:39:01,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:01,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:39:01,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:01,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:39:01,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:39:01,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 647 [2023-11-06 22:39:01,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 106 transitions, 407 flow. Second operand has 7 states, 7 states have (on average 279.57142857142856) internal successors, (1957), 7 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:01,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:01,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 647 [2023-11-06 22:39:01,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:01,537 INFO L124 PetriNetUnfolderBase]: 1485/2816 cut-off events. [2023-11-06 22:39:01,537 INFO L125 PetriNetUnfolderBase]: For 1250/1250 co-relation queries the response was YES. [2023-11-06 22:39:01,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6523 conditions, 2816 events. 1485/2816 cut-off events. For 1250/1250 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18431 event pairs, 26 based on Foata normal form. 324/2936 useless extension candidates. Maximal degree in co-relation 6463. Up to 1781 conditions per place. [2023-11-06 22:39:01,559 INFO L140 encePairwiseOnDemand]: 644/647 looper letters, 103 selfloop transitions, 3 changer transitions 0/115 dead transitions. [2023-11-06 22:39:01,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 115 transitions, 602 flow [2023-11-06 22:39:01,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:39:01,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:39:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1474 transitions. [2023-11-06 22:39:01,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4556414219474498 [2023-11-06 22:39:01,566 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1474 transitions. [2023-11-06 22:39:01,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1474 transitions. [2023-11-06 22:39:01,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:01,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1474 transitions. [2023-11-06 22:39:01,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 294.8) internal successors, (1474), 5 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) [2023-11-06 22:39:01,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 647.0) internal successors, (3882), 6 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:01,577 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 647.0) internal successors, (3882), 6 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:01,578 INFO L175 Difference]: Start difference. First operand has 112 places, 106 transitions, 407 flow. Second operand 5 states and 1474 transitions. [2023-11-06 22:39:01,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 115 transitions, 602 flow [2023-11-06 22:39:01,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 115 transitions, 584 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-06 22:39:01,585 INFO L231 Difference]: Finished difference. Result has 85 places, 64 transitions, 236 flow [2023-11-06 22:39:01,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=647, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=85, PETRI_TRANSITIONS=64} [2023-11-06 22:39:01,586 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -18 predicate places. [2023-11-06 22:39:01,587 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 64 transitions, 236 flow [2023-11-06 22:39:01,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 279.57142857142856) internal successors, (1957), 7 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:01,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:01,588 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:01,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:01,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:39:01,794 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:39:01,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:01,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1758985859, now seen corresponding path program 1 times [2023-11-06 22:39:01,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:01,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449922931] [2023-11-06 22:39:01,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:01,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-06 22:39:02,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:02,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449922931] [2023-11-06 22:39:02,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449922931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:02,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809086085] [2023-11-06 22:39:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:02,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:02,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:02,092 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:02,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:39:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:02,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:39:02,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:02,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:39:02,387 INFO L351 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 [2023-11-06 22:39:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-06 22:39:02,486 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:39:02,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809086085] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:39:02,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:39:02,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2023-11-06 22:39:02,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133638154] [2023-11-06 22:39:02,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:39:02,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:39:02,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:02,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:39:02,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:39:02,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 647 [2023-11-06 22:39:02,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 64 transitions, 236 flow. Second operand has 5 states, 5 states have (on average 247.0) internal successors, (1235), 5 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:02,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:02,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 647 [2023-11-06 22:39:02,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:39:03,251 INFO L124 PetriNetUnfolderBase]: 1346/2395 cut-off events. [2023-11-06 22:39:03,251 INFO L125 PetriNetUnfolderBase]: For 1558/1558 co-relation queries the response was YES. [2023-11-06 22:39:03,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6010 conditions, 2395 events. 1346/2395 cut-off events. For 1558/1558 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 14037 event pairs, 138 based on Foata normal form. 48/2344 useless extension candidates. Maximal degree in co-relation 5952. Up to 2032 conditions per place. [2023-11-06 22:39:03,262 INFO L140 encePairwiseOnDemand]: 642/647 looper letters, 67 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-11-06 22:39:03,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 77 transitions, 413 flow [2023-11-06 22:39:03,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:39:03,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:39:03,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1036 transitions. [2023-11-06 22:39:03,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40030911901081917 [2023-11-06 22:39:03,268 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1036 transitions. [2023-11-06 22:39:03,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1036 transitions. [2023-11-06 22:39:03,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:39:03,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1036 transitions. [2023-11-06 22:39:03,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:03,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 647.0) internal successors, (3235), 5 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:03,277 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 647.0) internal successors, (3235), 5 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:03,278 INFO L175 Difference]: Start difference. First operand has 85 places, 64 transitions, 236 flow. Second operand 4 states and 1036 transitions. [2023-11-06 22:39:03,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 77 transitions, 413 flow [2023-11-06 22:39:03,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 77 transitions, 404 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-06 22:39:03,283 INFO L231 Difference]: Finished difference. Result has 82 places, 61 transitions, 227 flow [2023-11-06 22:39:03,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=647, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=82, PETRI_TRANSITIONS=61} [2023-11-06 22:39:03,283 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -21 predicate places. [2023-11-06 22:39:03,284 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 61 transitions, 227 flow [2023-11-06 22:39:03,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 247.0) internal successors, (1235), 5 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:03,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:03,284 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-06 22:39:03,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:03,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dcc15ce-85b6-4136-98e2-7a4360768d2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:03,490 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-06 22:39:03,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:03,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1286879053, now seen corresponding path program 1 times [2023-11-06 22:39:03,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:03,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782469006] [2023-11-06 22:39:03,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:03,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:39:03,516 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:39:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:39:03,540 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:39:03,540 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:39:03,540 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2023-11-06 22:39:03,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2023-11-06 22:39:03,541 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2023-11-06 22:39:03,541 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2023-11-06 22:39:03,541 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2023-11-06 22:39:03,541 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2023-11-06 22:39:03,541 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2023-11-06 22:39:03,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2023-11-06 22:39:03,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2023-11-06 22:39:03,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (40 of 50 remaining) [2023-11-06 22:39:03,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2023-11-06 22:39:03,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2023-11-06 22:39:03,543 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2023-11-06 22:39:03,543 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2023-11-06 22:39:03,543 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2023-11-06 22:39:03,543 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2023-11-06 22:39:03,544 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2023-11-06 22:39:03,544 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2023-11-06 22:39:03,544 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2023-11-06 22:39:03,544 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2023-11-06 22:39:03,544 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2023-11-06 22:39:03,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2023-11-06 22:39:03,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2023-11-06 22:39:03,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2023-11-06 22:39:03,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2023-11-06 22:39:03,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2023-11-06 22:39:03,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2023-11-06 22:39:03,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2023-11-06 22:39:03,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2023-11-06 22:39:03,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2023-11-06 22:39:03,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2023-11-06 22:39:03,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2023-11-06 22:39:03,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2023-11-06 22:39:03,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2023-11-06 22:39:03,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2023-11-06 22:39:03,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2023-11-06 22:39:03,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2023-11-06 22:39:03,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2023-11-06 22:39:03,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2023-11-06 22:39:03,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2023-11-06 22:39:03,549 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2023-11-06 22:39:03,549 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2023-11-06 22:39:03,549 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2023-11-06 22:39:03,549 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2023-11-06 22:39:03,549 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2023-11-06 22:39:03,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2023-11-06 22:39:03,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2023-11-06 22:39:03,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2023-11-06 22:39:03,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2023-11-06 22:39:03,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2023-11-06 22:39:03,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-06 22:39:03,551 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:03,552 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:39:03,552 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:39:03,614 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:39:03,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 369 places, 425 transitions, 877 flow [2023-11-06 22:39:03,814 INFO L124 PetriNetUnfolderBase]: 117/823 cut-off events. [2023-11-06 22:39:03,815 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-11-06 22:39:03,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 823 events. 117/823 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4203 event pairs, 1 based on Foata normal form. 0/593 useless extension candidates. Maximal degree in co-relation 566. Up to 16 conditions per place. [2023-11-06 22:39:03,826 INFO L82 GeneralOperation]: Start removeDead. Operand has 369 places, 425 transitions, 877 flow [2023-11-06 22:39:03,842 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 369 places, 425 transitions, 877 flow [2023-11-06 22:39:03,842 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:39:03,842 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 369 places, 425 transitions, 877 flow [2023-11-06 22:39:03,843 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 369 places, 425 transitions, 877 flow [2023-11-06 22:39:03,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 369 places, 425 transitions, 877 flow [2023-11-06 22:39:04,038 INFO L124 PetriNetUnfolderBase]: 117/823 cut-off events. [2023-11-06 22:39:04,038 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-11-06 22:39:04,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 823 events. 117/823 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4203 event pairs, 1 based on Foata normal form. 0/593 useless extension candidates. Maximal degree in co-relation 566. Up to 16 conditions per place. [2023-11-06 22:39:04,114 INFO L119 LiptonReduction]: Number of co-enabled transitions 108000 [2023-11-06 22:39:11,497 INFO L134 LiptonReduction]: Checked pairs total: 222957 [2023-11-06 22:39:11,497 INFO L136 LiptonReduction]: Total number of compositions: 407 [2023-11-06 22:39:11,503 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:39:11,504 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;@7ece0662, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:39:11,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2023-11-06 22:39:11,506 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:39:11,506 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-06 22:39:11,506 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:39:11,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:39:11,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:39:11,507 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-11-06 22:39:11,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:11,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2608968, now seen corresponding path program 1 times [2023-11-06 22:39:11,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:11,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022802473] [2023-11-06 22:39:11,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:11,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:11,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:11,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022802473] [2023-11-06 22:39:11,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022802473] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:39:11,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:39:11,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:39:11,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084784702] [2023-11-06 22:39:11,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:39:11,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:39:11,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:11,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:39:11,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:39:11,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 354 out of 832 [2023-11-06 22:39:11,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 178 transitions, 383 flow. Second operand has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:11,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:39:11,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 354 of 832 [2023-11-06 22:39:11,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand