./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8 --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 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 18:38:41,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:38:41,598 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:38:41,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:38:41,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:38:41,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:38:41,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:38:41,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:38:41,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:38:41,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:38:41,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:38:41,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:38:41,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:38:41,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:38:41,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:38:41,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:38:41,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:38:41,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:38:41,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:38:41,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:38:41,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:38:41,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:38:41,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:38:41,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:38:41,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:38:41,627 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:38:41,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:38:41,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:38:41,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:38:41,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:38:41,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:38:41,629 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:38:41,630 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:38:41,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:38:41,631 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:38:41,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:38:41,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:38:41,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:38:41,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:38:41,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:38:41,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:38:41,633 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 18:38:41,647 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:38:41,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:38:41,647 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:38:41,647 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:38:41,647 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:38:41,648 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:38:41,648 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:38:41,648 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:38:41,648 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:38:41,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:38:41,648 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:38:41,648 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:38:41,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:38:41,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:38:41,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:38:41,649 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:38:41,649 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:38:41,649 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:38:41,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:38:41,649 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:38:41,649 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:38:41,649 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:38:41,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:38:41,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:38:41,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:38:41,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:38:41,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:38:41,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:38:41,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:38:41,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:38:41,650 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:38:41,650 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:38:41,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:38:41,650 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:38:41,651 INFO L138 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_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a [2022-12-13 18:38:41,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:38:41,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:38:41,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:38:41,886 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:38:41,886 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:38:41,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i [2022-12-13 18:38:44,456 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:38:44,675 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:38:44,675 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i [2022-12-13 18:38:44,685 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/data/47086b31c/5e2c31c35ae54d92b47926c630b87d3a/FLAG8dd92f117 [2022-12-13 18:38:45,026 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/data/47086b31c/5e2c31c35ae54d92b47926c630b87d3a [2022-12-13 18:38:45,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:38:45,029 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:38:45,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:38:45,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:38:45,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:38:45,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:38:45" (1/1) ... [2022-12-13 18:38:45,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@147f9c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:45, skipping insertion in model container [2022-12-13 18:38:45,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:38:45" (1/1) ... [2022-12-13 18:38:45,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:38:45,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:38:45,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:38:45,411 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:38:45,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:38:45,467 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:38:45,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:45 WrapperNode [2022-12-13 18:38:45,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:38:45,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:38:45,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:38:45,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:38:45,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:45" (1/1) ... [2022-12-13 18:38:45,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:45" (1/1) ... [2022-12-13 18:38:45,498 INFO L138 Inliner]: procedures = 262, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-12-13 18:38:45,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:38:45,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:38:45,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:38:45,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:38:45,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:45" (1/1) ... [2022-12-13 18:38:45,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:45" (1/1) ... [2022-12-13 18:38:45,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:45" (1/1) ... [2022-12-13 18:38:45,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:45" (1/1) ... [2022-12-13 18:38:45,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:45" (1/1) ... [2022-12-13 18:38:45,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:45" (1/1) ... [2022-12-13 18:38:45,517 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:45" (1/1) ... [2022-12-13 18:38:45,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:45" (1/1) ... [2022-12-13 18:38:45,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:38:45,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:38:45,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:38:45,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:38:45,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:45" (1/1) ... [2022-12-13 18:38:45,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:38:45,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:38:45,543 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:38:45,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:38:45,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:38:45,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:38:45,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 18:38:45,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 18:38:45,577 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 18:38:45,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:38:45,578 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 18:38:45,578 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 18:38:45,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:38:45,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:38:45,579 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 18:38:45,686 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:38:45,688 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:38:45,850 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:38:45,857 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:38:45,857 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 18:38:45,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:38:45 BoogieIcfgContainer [2022-12-13 18:38:45,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:38:45,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:38:45,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:38:45,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:38:45,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:38:45" (1/3) ... [2022-12-13 18:38:45,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27996031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:38:45, skipping insertion in model container [2022-12-13 18:38:45,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:45" (2/3) ... [2022-12-13 18:38:45,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27996031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:38:45, skipping insertion in model container [2022-12-13 18:38:45,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:38:45" (3/3) ... [2022-12-13 18:38:45,874 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_05-funloop_hard2.i [2022-12-13 18:38:45,892 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:38:45,892 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-12-13 18:38:45,892 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 18:38:45,946 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 18:38:45,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 104 transitions, 213 flow [2022-12-13 18:38:46,017 INFO L130 PetriNetUnfolder]: 6/103 cut-off events. [2022-12-13 18:38:46,017 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:38:46,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 103 events. 6/103 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 211 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-12-13 18:38:46,023 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 104 transitions, 213 flow [2022-12-13 18:38:46,027 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 103 transitions, 209 flow [2022-12-13 18:38:46,030 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:38:46,041 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 101 places, 103 transitions, 209 flow [2022-12-13 18:38:46,044 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 101 places, 103 transitions, 209 flow [2022-12-13 18:38:46,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 103 transitions, 209 flow [2022-12-13 18:38:46,070 INFO L130 PetriNetUnfolder]: 6/103 cut-off events. [2022-12-13 18:38:46,071 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:38:46,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 103 events. 6/103 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 210 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-12-13 18:38:46,074 INFO L119 LiptonReduction]: Number of co-enabled transitions 2632 [2022-12-13 18:38:47,856 INFO L134 LiptonReduction]: Checked pairs total: 3774 [2022-12-13 18:38:47,856 INFO L136 LiptonReduction]: Total number of compositions: 109 [2022-12-13 18:38:47,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:38:47,873 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;@32d0f921, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:38:47,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-12-13 18:38:47,874 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-12-13 18:38:47,874 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:38:47,875 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:38:47,875 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 18:38:47,875 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:38:47,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:47,879 INFO L85 PathProgramCache]: Analyzing trace with hash 12945, now seen corresponding path program 1 times [2022-12-13 18:38:47,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:47,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773612508] [2022-12-13 18:38:47,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:47,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:47,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:38:47,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:47,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773612508] [2022-12-13 18:38:47,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773612508] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:38:47,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:38:48,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:38:48,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450693531] [2022-12-13 18:38:48,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:38:48,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 18:38:48,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:48,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 18:38:48,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 18:38:48,028 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 213 [2022-12-13 18:38:48,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 73 flow. Second operand has 2 states, 2 states have (on average 101.0) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:48,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:38:48,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 213 [2022-12-13 18:38:48,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:38:48,110 INFO L130 PetriNetUnfolder]: 122/254 cut-off events. [2022-12-13 18:38:48,110 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:38:48,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 254 events. 122/254 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1063 event pairs, 98 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 490. Up to 245 conditions per place. [2022-12-13 18:38:48,113 INFO L137 encePairwiseOnDemand]: 206/213 looper letters, 27 selfloop transitions, 0 changer transitions 0/28 dead transitions. [2022-12-13 18:38:48,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 113 flow [2022-12-13 18:38:48,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 18:38:48,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 18:38:48,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 234 transitions. [2022-12-13 18:38:48,126 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5492957746478874 [2022-12-13 18:38:48,127 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 234 transitions. [2022-12-13 18:38:48,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 234 transitions. [2022-12-13 18:38:48,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:38:48,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 234 transitions. [2022-12-13 18:38:48,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 117.0) internal successors, (234), 2 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:48,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:48,139 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:48,141 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 73 flow. Second operand 2 states and 234 transitions. [2022-12-13 18:38:48,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 113 flow [2022-12-13 18:38:48,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 28 transitions, 112 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:38:48,145 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 58 flow [2022-12-13 18:38:48,147 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2022-12-13 18:38:48,151 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -7 predicate places. [2022-12-13 18:38:48,151 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 58 flow [2022-12-13 18:38:48,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 101.0) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:48,151 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:38:48,151 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 18:38:48,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 18:38:48,152 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:38:48,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:48,152 INFO L85 PathProgramCache]: Analyzing trace with hash 385851678, now seen corresponding path program 1 times [2022-12-13 18:38:48,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:48,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398418882] [2022-12-13 18:38:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:48,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:38:48,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:48,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398418882] [2022-12-13 18:38:48,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398418882] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:38:48,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:38:48,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:38:48,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956017932] [2022-12-13 18:38:48,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:38:48,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:38:48,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:48,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:38:48,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:38:48,242 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 213 [2022-12-13 18:38:48,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:48,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:38:48,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 213 [2022-12-13 18:38:48,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:38:48,313 INFO L130 PetriNetUnfolder]: 122/255 cut-off events. [2022-12-13 18:38:48,313 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:38:48,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 255 events. 122/255 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1063 event pairs, 98 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 502. Up to 245 conditions per place. [2022-12-13 18:38:48,316 INFO L137 encePairwiseOnDemand]: 210/213 looper letters, 26 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2022-12-13 18:38:48,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 116 flow [2022-12-13 18:38:48,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:38:48,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:38:48,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2022-12-13 18:38:48,318 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49608763693270735 [2022-12-13 18:38:48,318 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2022-12-13 18:38:48,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2022-12-13 18:38:48,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:38:48,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2022-12-13 18:38:48,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:48,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:48,322 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:48,323 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 58 flow. Second operand 3 states and 317 transitions. [2022-12-13 18:38:48,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 116 flow [2022-12-13 18:38:48,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 116 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 18:38:48,324 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 70 flow [2022-12-13 18:38:48,324 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2022-12-13 18:38:48,325 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2022-12-13 18:38:48,325 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 70 flow [2022-12-13 18:38:48,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:48,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:38:48,326 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:38:48,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 18:38:48,326 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:38:48,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:48,327 INFO L85 PathProgramCache]: Analyzing trace with hash -915326307, now seen corresponding path program 1 times [2022-12-13 18:38:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:48,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090265674] [2022-12-13 18:38:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:48,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:38:48,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:48,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090265674] [2022-12-13 18:38:48,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090265674] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:38:48,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741632614] [2022-12-13 18:38:48,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:48,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:48,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:38:48,400 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:38:48,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 18:38:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:48,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 18:38:48,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:38:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:38:48,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:38:48,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741632614] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:38:48,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:38:48,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2022-12-13 18:38:48,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258631421] [2022-12-13 18:38:48,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:38:48,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:38:48,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:48,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:38:48,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:38:48,480 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 213 [2022-12-13 18:38:48,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:48,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:38:48,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 213 [2022-12-13 18:38:48,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:38:48,583 INFO L130 PetriNetUnfolder]: 170/343 cut-off events. [2022-12-13 18:38:48,583 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:38:48,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 343 events. 170/343 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1420 event pairs, 98 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 691. Up to 246 conditions per place. [2022-12-13 18:38:48,586 INFO L137 encePairwiseOnDemand]: 208/213 looper letters, 40 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2022-12-13 18:38:48,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 43 transitions, 182 flow [2022-12-13 18:38:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:38:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:38:48,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2022-12-13 18:38:48,588 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.514866979655712 [2022-12-13 18:38:48,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2022-12-13 18:38:48,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2022-12-13 18:38:48,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:38:48,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2022-12-13 18:38:48,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:48,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:48,592 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:48,592 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 70 flow. Second operand 3 states and 329 transitions. [2022-12-13 18:38:48,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 43 transitions, 182 flow [2022-12-13 18:38:48,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 43 transitions, 178 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 18:38:48,594 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 82 flow [2022-12-13 18:38:48,594 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2022-12-13 18:38:48,595 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2022-12-13 18:38:48,595 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 82 flow [2022-12-13 18:38:48,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:48,595 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:38:48,596 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:38:48,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:38:48,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:48,798 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:38:48,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:48,799 INFO L85 PathProgramCache]: Analyzing trace with hash -915326288, now seen corresponding path program 1 times [2022-12-13 18:38:48,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:48,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998710042] [2022-12-13 18:38:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:48,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:38:48,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:48,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998710042] [2022-12-13 18:38:48,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998710042] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:38:48,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861571710] [2022-12-13 18:38:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:48,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:48,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:38:48,967 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:38:48,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 18:38:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:49,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 18:38:49,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:38:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:38:49,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:38:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:38:49,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861571710] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:38:49,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:38:49,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 18:38:49,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988149504] [2022-12-13 18:38:49,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:38:49,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:38:49,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:49,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:38:49,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:38:49,068 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 213 [2022-12-13 18:38:49,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 96.57142857142857) internal successors, (676), 7 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:49,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:38:49,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 213 [2022-12-13 18:38:49,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:38:49,168 INFO L130 PetriNetUnfolder]: 170/349 cut-off events. [2022-12-13 18:38:49,168 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-12-13 18:38:49,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 349 events. 170/349 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1362 event pairs, 140 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 757. Up to 341 conditions per place. [2022-12-13 18:38:49,171 INFO L137 encePairwiseOnDemand]: 210/213 looper letters, 27 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2022-12-13 18:38:49,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 33 transitions, 158 flow [2022-12-13 18:38:49,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:38:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 18:38:49,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 604 transitions. [2022-12-13 18:38:49,173 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4726134585289515 [2022-12-13 18:38:49,173 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 604 transitions. [2022-12-13 18:38:49,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 604 transitions. [2022-12-13 18:38:49,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:38:49,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 604 transitions. [2022-12-13 18:38:49,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 100.66666666666667) internal successors, (604), 6 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:49,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 213.0) internal successors, (1491), 7 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:49,180 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 213.0) internal successors, (1491), 7 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:49,180 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 82 flow. Second operand 6 states and 604 transitions. [2022-12-13 18:38:49,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 33 transitions, 158 flow [2022-12-13 18:38:49,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 33 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 18:38:49,181 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 116 flow [2022-12-13 18:38:49,182 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2022-12-13 18:38:49,182 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2022-12-13 18:38:49,182 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 116 flow [2022-12-13 18:38:49,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 96.57142857142857) internal successors, (676), 7 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:49,183 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:38:49,183 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2022-12-13 18:38:49,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 18:38:49,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:49,384 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:38:49,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:49,384 INFO L85 PathProgramCache]: Analyzing trace with hash -212236486, now seen corresponding path program 1 times [2022-12-13 18:38:49,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:49,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044808449] [2022-12-13 18:38:49,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:49,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:38:49,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:49,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044808449] [2022-12-13 18:38:49,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044808449] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:38:49,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776344728] [2022-12-13 18:38:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:49,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:49,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:38:49,451 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:38:49,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 18:38:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:49,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 18:38:49,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:38:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:38:49,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:38:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:38:49,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776344728] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:38:49,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:38:49,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 18:38:49,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245535373] [2022-12-13 18:38:49,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:38:49,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 18:38:49,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:49,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 18:38:49,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 18:38:49,583 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 213 [2022-12-13 18:38:49,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 116 flow. Second operand has 13 states, 13 states have (on average 96.3076923076923) internal successors, (1252), 13 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:49,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:38:49,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 213 [2022-12-13 18:38:49,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:38:49,676 INFO L130 PetriNetUnfolder]: 170/355 cut-off events. [2022-12-13 18:38:49,677 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-12-13 18:38:49,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 355 events. 170/355 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1362 event pairs, 140 based on Foata normal form. 6/242 useless extension candidates. Maximal degree in co-relation 785. Up to 341 conditions per place. [2022-12-13 18:38:49,679 INFO L137 encePairwiseOnDemand]: 210/213 looper letters, 27 selfloop transitions, 11 changer transitions 0/39 dead transitions. [2022-12-13 18:38:49,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 39 transitions, 228 flow [2022-12-13 18:38:49,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:38:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 18:38:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1183 transitions. [2022-12-13 18:38:49,681 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4628325508607199 [2022-12-13 18:38:49,681 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1183 transitions. [2022-12-13 18:38:49,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1183 transitions. [2022-12-13 18:38:49,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:38:49,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1183 transitions. [2022-12-13 18:38:49,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 98.58333333333333) internal successors, (1183), 12 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:49,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 213.0) internal successors, (2769), 13 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:49,687 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 213.0) internal successors, (2769), 13 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:49,687 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 116 flow. Second operand 12 states and 1183 transitions. [2022-12-13 18:38:49,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 39 transitions, 228 flow [2022-12-13 18:38:49,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 39 transitions, 214 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 18:38:49,688 INFO L231 Difference]: Finished difference. Result has 57 places, 39 transitions, 186 flow [2022-12-13 18:38:49,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=186, PETRI_PLACES=57, PETRI_TRANSITIONS=39} [2022-12-13 18:38:49,689 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2022-12-13 18:38:49,689 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 39 transitions, 186 flow [2022-12-13 18:38:49,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 96.3076923076923) internal successors, (1252), 13 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:49,690 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:38:49,690 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2022-12-13 18:38:49,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 18:38:49,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:49,891 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:38:49,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:49,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1953423066, now seen corresponding path program 2 times [2022-12-13 18:38:49,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:49,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778631585] [2022-12-13 18:38:49,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:49,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:38:50,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:50,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778631585] [2022-12-13 18:38:50,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778631585] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:38:50,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:38:50,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:38:50,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309742861] [2022-12-13 18:38:50,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:38:50,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:38:50,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:50,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:38:50,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:38:50,272 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 213 [2022-12-13 18:38:50,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 39 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 93.2) internal successors, (466), 5 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:50,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:38:50,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 213 [2022-12-13 18:38:50,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:38:50,392 INFO L130 PetriNetUnfolder]: 262/569 cut-off events. [2022-12-13 18:38:50,392 INFO L131 PetriNetUnfolder]: For 76/76 co-relation queries the response was YES. [2022-12-13 18:38:50,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 569 events. 262/569 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2741 event pairs, 133 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 1217. Up to 334 conditions per place. [2022-12-13 18:38:50,396 INFO L137 encePairwiseOnDemand]: 207/213 looper letters, 54 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2022-12-13 18:38:50,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 346 flow [2022-12-13 18:38:50,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:38:50,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:38:50,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 417 transitions. [2022-12-13 18:38:50,397 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4894366197183099 [2022-12-13 18:38:50,397 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 417 transitions. [2022-12-13 18:38:50,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 417 transitions. [2022-12-13 18:38:50,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:38:50,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 417 transitions. [2022-12-13 18:38:50,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:50,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 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) [2022-12-13 18:38:50,399 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 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) [2022-12-13 18:38:50,399 INFO L175 Difference]: Start difference. First operand has 57 places, 39 transitions, 186 flow. Second operand 4 states and 417 transitions. [2022-12-13 18:38:50,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 346 flow [2022-12-13 18:38:50,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 58 transitions, 298 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-12-13 18:38:50,403 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 150 flow [2022-12-13 18:38:50,404 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=55, PETRI_TRANSITIONS=39} [2022-12-13 18:38:50,404 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 19 predicate places. [2022-12-13 18:38:50,404 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 150 flow [2022-12-13 18:38:50,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.2) internal successors, (466), 5 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:50,405 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:38:50,405 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2022-12-13 18:38:50,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 18:38:50,405 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:38:50,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:50,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1953423505, now seen corresponding path program 2 times [2022-12-13 18:38:50,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:50,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180998306] [2022-12-13 18:38:50,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:50,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:38:50,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:50,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180998306] [2022-12-13 18:38:50,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180998306] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:38:50,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:38:50,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:38:50,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286656595] [2022-12-13 18:38:50,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:38:50,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:38:50,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:50,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:38:50,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:38:50,565 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 213 [2022-12-13 18:38:50,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 39 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:50,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:38:50,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 213 [2022-12-13 18:38:50,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:38:50,673 INFO L130 PetriNetUnfolder]: 223/466 cut-off events. [2022-12-13 18:38:50,673 INFO L131 PetriNetUnfolder]: For 152/152 co-relation queries the response was YES. [2022-12-13 18:38:50,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1119 conditions, 466 events. 223/466 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1905 event pairs, 168 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 1102. Up to 404 conditions per place. [2022-12-13 18:38:50,676 INFO L137 encePairwiseOnDemand]: 208/213 looper letters, 42 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2022-12-13 18:38:50,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 46 transitions, 264 flow [2022-12-13 18:38:50,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:38:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:38:50,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 322 transitions. [2022-12-13 18:38:50,678 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5039123630672926 [2022-12-13 18:38:50,678 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 322 transitions. [2022-12-13 18:38:50,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 322 transitions. [2022-12-13 18:38:50,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:38:50,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 322 transitions. [2022-12-13 18:38:50,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:50,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:50,680 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:50,680 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 150 flow. Second operand 3 states and 322 transitions. [2022-12-13 18:38:50,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 46 transitions, 264 flow [2022-12-13 18:38:50,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 258 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:38:50,683 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 146 flow [2022-12-13 18:38:50,683 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2022-12-13 18:38:50,684 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2022-12-13 18:38:50,684 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 146 flow [2022-12-13 18:38:50,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:50,684 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:38:50,684 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2022-12-13 18:38:50,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 18:38:50,685 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:38:50,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:50,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1953423508, now seen corresponding path program 1 times [2022-12-13 18:38:50,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:50,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499869391] [2022-12-13 18:38:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:50,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:38:50,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:50,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499869391] [2022-12-13 18:38:50,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499869391] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:38:50,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:38:50,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:38:50,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991781855] [2022-12-13 18:38:50,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:38:50,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:38:50,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:50,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:38:50,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:38:50,925 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 213 [2022-12-13 18:38:50,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 92.2) internal successors, (461), 5 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:50,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:38:50,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 213 [2022-12-13 18:38:50,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:38:51,033 INFO L130 PetriNetUnfolder]: 210/434 cut-off events. [2022-12-13 18:38:51,034 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2022-12-13 18:38:51,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1065 conditions, 434 events. 210/434 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1757 event pairs, 132 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 1048. Up to 326 conditions per place. [2022-12-13 18:38:51,035 INFO L137 encePairwiseOnDemand]: 209/213 looper letters, 45 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2022-12-13 18:38:51,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 276 flow [2022-12-13 18:38:51,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:38:51,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:38:51,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 401 transitions. [2022-12-13 18:38:51,036 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4706572769953052 [2022-12-13 18:38:51,037 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 401 transitions. [2022-12-13 18:38:51,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 401 transitions. [2022-12-13 18:38:51,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:38:51,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 401 transitions. [2022-12-13 18:38:51,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 100.25) internal successors, (401), 4 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:51,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 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) [2022-12-13 18:38:51,038 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 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) [2022-12-13 18:38:51,038 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 146 flow. Second operand 4 states and 401 transitions. [2022-12-13 18:38:51,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 276 flow [2022-12-13 18:38:51,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 49 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 18:38:51,040 INFO L231 Difference]: Finished difference. Result has 55 places, 37 transitions, 150 flow [2022-12-13 18:38:51,040 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=55, PETRI_TRANSITIONS=37} [2022-12-13 18:38:51,040 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 19 predicate places. [2022-12-13 18:38:51,040 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 37 transitions, 150 flow [2022-12-13 18:38:51,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.2) internal successors, (461), 5 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:51,041 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:38:51,041 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 18:38:51,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 18:38:51,041 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:38:51,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:51,041 INFO L85 PathProgramCache]: Analyzing trace with hash 426573157, now seen corresponding path program 1 times [2022-12-13 18:38:51,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:51,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663898305] [2022-12-13 18:38:51,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:51,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:38:51,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:51,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663898305] [2022-12-13 18:38:51,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663898305] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:38:51,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:38:51,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:38:51,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197795055] [2022-12-13 18:38:51,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:38:51,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:38:51,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:51,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:38:51,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:38:51,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 213 [2022-12-13 18:38:51,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 37 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:51,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:38:51,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 213 [2022-12-13 18:38:51,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:38:51,336 INFO L130 PetriNetUnfolder]: 180/388 cut-off events. [2022-12-13 18:38:51,336 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2022-12-13 18:38:51,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 388 events. 180/388 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1553 event pairs, 13 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 978. Up to 266 conditions per place. [2022-12-13 18:38:51,339 INFO L137 encePairwiseOnDemand]: 204/213 looper letters, 55 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2022-12-13 18:38:51,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 65 transitions, 370 flow [2022-12-13 18:38:51,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:38:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:38:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 503 transitions. [2022-12-13 18:38:51,340 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4723004694835681 [2022-12-13 18:38:51,340 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 503 transitions. [2022-12-13 18:38:51,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 503 transitions. [2022-12-13 18:38:51,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:38:51,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 503 transitions. [2022-12-13 18:38:51,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:51,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 213.0) internal successors, (1278), 6 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:51,342 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 213.0) internal successors, (1278), 6 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:51,342 INFO L175 Difference]: Start difference. First operand has 55 places, 37 transitions, 150 flow. Second operand 5 states and 503 transitions. [2022-12-13 18:38:51,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 65 transitions, 370 flow [2022-12-13 18:38:51,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 360 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 18:38:51,344 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 216 flow [2022-12-13 18:38:51,344 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2022-12-13 18:38:51,344 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2022-12-13 18:38:51,345 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 216 flow [2022-12-13 18:38:51,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:51,345 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:38:51,345 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:38:51,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 18:38:51,345 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:38:51,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:51,345 INFO L85 PathProgramCache]: Analyzing trace with hash -361111429, now seen corresponding path program 1 times [2022-12-13 18:38:51,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:51,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515119567] [2022-12-13 18:38:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:51,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:38:51,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:51,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515119567] [2022-12-13 18:38:51,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515119567] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:38:51,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530522075] [2022-12-13 18:38:51,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:51,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:51,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:38:51,544 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:38:51,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 18:38:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:51,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 18:38:51,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:38:51,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:38:51,746 INFO L350 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 12 treesize of output 14 [2022-12-13 18:38:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:38:51,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:38:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:38:54,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530522075] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:38:54,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:38:54,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2022-12-13 18:38:54,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553544437] [2022-12-13 18:38:54,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:38:54,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 18:38:54,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:54,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 18:38:54,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-12-13 18:38:54,677 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 213 [2022-12-13 18:38:54,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 216 flow. Second operand has 15 states, 15 states have (on average 89.0) internal successors, (1335), 15 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:54,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:38:54,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 213 [2022-12-13 18:38:54,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:38:55,032 INFO L130 PetriNetUnfolder]: 312/652 cut-off events. [2022-12-13 18:38:55,032 INFO L131 PetriNetUnfolder]: For 559/559 co-relation queries the response was YES. [2022-12-13 18:38:55,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1923 conditions, 652 events. 312/652 cut-off events. For 559/559 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2482 event pairs, 100 based on Foata normal form. 66/707 useless extension candidates. Maximal degree in co-relation 1902. Up to 296 conditions per place. [2022-12-13 18:38:55,035 INFO L137 encePairwiseOnDemand]: 207/213 looper letters, 96 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2022-12-13 18:38:55,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 104 transitions, 668 flow [2022-12-13 18:38:55,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:38:55,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 18:38:55,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 777 transitions. [2022-12-13 18:38:55,037 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45598591549295775 [2022-12-13 18:38:55,037 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 777 transitions. [2022-12-13 18:38:55,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 777 transitions. [2022-12-13 18:38:55,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:38:55,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 777 transitions. [2022-12-13 18:38:55,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.125) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:55,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 213.0) internal successors, (1917), 9 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:55,040 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 213.0) internal successors, (1917), 9 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:55,040 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 216 flow. Second operand 8 states and 777 transitions. [2022-12-13 18:38:55,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 104 transitions, 668 flow [2022-12-13 18:38:55,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 104 transitions, 668 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 18:38:55,042 INFO L231 Difference]: Finished difference. Result has 71 places, 48 transitions, 268 flow [2022-12-13 18:38:55,043 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=268, PETRI_PLACES=71, PETRI_TRANSITIONS=48} [2022-12-13 18:38:55,043 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 35 predicate places. [2022-12-13 18:38:55,043 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 48 transitions, 268 flow [2022-12-13 18:38:55,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 89.0) internal successors, (1335), 15 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:55,043 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:38:55,043 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:38:55,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 18:38:55,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 18:38:55,244 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:38:55,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:55,244 INFO L85 PathProgramCache]: Analyzing trace with hash -765896913, now seen corresponding path program 1 times [2022-12-13 18:38:55,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:55,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887998623] [2022-12-13 18:38:55,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:55,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:38:55,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:55,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887998623] [2022-12-13 18:38:55,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887998623] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:38:55,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454604389] [2022-12-13 18:38:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:55,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:55,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:38:55,448 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:38:55,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 18:38:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:55,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 18:38:55,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:38:55,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:38:55,600 INFO L350 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 12 treesize of output 14 [2022-12-13 18:38:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:38:55,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:38:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:38:55,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454604389] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:38:55,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:38:55,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2022-12-13 18:38:55,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713269477] [2022-12-13 18:38:55,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:38:55,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 18:38:55,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:55,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 18:38:55,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-12-13 18:38:56,505 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 213 [2022-12-13 18:38:56,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 48 transitions, 268 flow. Second operand has 15 states, 15 states have (on average 90.0) internal successors, (1350), 15 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:56,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:38:56,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 213 [2022-12-13 18:38:56,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:38:56,983 INFO L130 PetriNetUnfolder]: 648/1354 cut-off events. [2022-12-13 18:38:56,984 INFO L131 PetriNetUnfolder]: For 1734/1734 co-relation queries the response was YES. [2022-12-13 18:38:56,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4440 conditions, 1354 events. 648/1354 cut-off events. For 1734/1734 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 6391 event pairs, 150 based on Foata normal form. 180/1511 useless extension candidates. Maximal degree in co-relation 4414. Up to 420 conditions per place. [2022-12-13 18:38:56,995 INFO L137 encePairwiseOnDemand]: 207/213 looper letters, 154 selfloop transitions, 8 changer transitions 0/163 dead transitions. [2022-12-13 18:38:56,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 163 transitions, 1222 flow [2022-12-13 18:38:56,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:38:56,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 18:38:56,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 814 transitions. [2022-12-13 18:38:56,997 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47769953051643194 [2022-12-13 18:38:56,997 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 814 transitions. [2022-12-13 18:38:56,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 814 transitions. [2022-12-13 18:38:56,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:38:56,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 814 transitions. [2022-12-13 18:38:56,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 101.75) internal successors, (814), 8 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:57,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 213.0) internal successors, (1917), 9 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:57,000 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 213.0) internal successors, (1917), 9 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:57,000 INFO L175 Difference]: Start difference. First operand has 71 places, 48 transitions, 268 flow. Second operand 8 states and 814 transitions. [2022-12-13 18:38:57,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 163 transitions, 1222 flow [2022-12-13 18:38:57,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 163 transitions, 1173 flow, removed 18 selfloop flow, removed 2 redundant places. [2022-12-13 18:38:57,004 INFO L231 Difference]: Finished difference. Result has 80 places, 52 transitions, 324 flow [2022-12-13 18:38:57,005 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=324, PETRI_PLACES=80, PETRI_TRANSITIONS=52} [2022-12-13 18:38:57,005 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 44 predicate places. [2022-12-13 18:38:57,005 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 52 transitions, 324 flow [2022-12-13 18:38:57,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 90.0) internal successors, (1350), 15 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:57,005 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:38:57,005 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-13 18:38:57,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 18:38:57,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:57,206 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:38:57,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:57,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1799349456, now seen corresponding path program 2 times [2022-12-13 18:38:57,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:57,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355482879] [2022-12-13 18:38:57,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:57,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:57,574 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:38:57,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:57,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355482879] [2022-12-13 18:38:57,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355482879] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:38:57,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744409619] [2022-12-13 18:38:57,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:38:57,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:57,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:38:57,576 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:38:57,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 18:38:57,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:38:57,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:38:57,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 18:38:57,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:38:57,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:38:57,763 INFO L350 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 12 treesize of output 14 [2022-12-13 18:38:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:38:57,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:38:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:38:58,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744409619] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:38:58,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:38:58,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2022-12-13 18:38:58,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366107863] [2022-12-13 18:38:58,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:38:58,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 18:38:58,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:58,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 18:38:58,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-12-13 18:39:00,078 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 213 [2022-12-13 18:39:00,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 52 transitions, 324 flow. Second operand has 25 states, 25 states have (on average 89.64) internal successors, (2241), 25 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:00,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:39:00,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 213 [2022-12-13 18:39:00,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:39:01,123 INFO L130 PetriNetUnfolder]: 1200/2458 cut-off events. [2022-12-13 18:39:01,123 INFO L131 PetriNetUnfolder]: For 7025/7025 co-relation queries the response was YES. [2022-12-13 18:39:01,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8791 conditions, 2458 events. 1200/2458 cut-off events. For 7025/7025 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 11348 event pairs, 220 based on Foata normal form. 276/2711 useless extension candidates. Maximal degree in co-relation 8761. Up to 608 conditions per place. [2022-12-13 18:39:01,134 INFO L137 encePairwiseOnDemand]: 207/213 looper letters, 205 selfloop transitions, 13 changer transitions 0/219 dead transitions. [2022-12-13 18:39:01,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 219 transitions, 1862 flow [2022-12-13 18:39:01,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 18:39:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 18:39:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1371 transitions. [2022-12-13 18:39:01,136 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4597585513078471 [2022-12-13 18:39:01,136 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1371 transitions. [2022-12-13 18:39:01,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1371 transitions. [2022-12-13 18:39:01,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:39:01,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1371 transitions. [2022-12-13 18:39:01,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 97.92857142857143) internal successors, (1371), 14 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:01,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 213.0) internal successors, (3195), 15 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:01,141 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 213.0) internal successors, (3195), 15 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:01,141 INFO L175 Difference]: Start difference. First operand has 80 places, 52 transitions, 324 flow. Second operand 14 states and 1371 transitions. [2022-12-13 18:39:01,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 219 transitions, 1862 flow [2022-12-13 18:39:01,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 219 transitions, 1763 flow, removed 37 selfloop flow, removed 2 redundant places. [2022-12-13 18:39:01,148 INFO L231 Difference]: Finished difference. Result has 97 places, 58 transitions, 413 flow [2022-12-13 18:39:01,148 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=413, PETRI_PLACES=97, PETRI_TRANSITIONS=58} [2022-12-13 18:39:01,148 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 61 predicate places. [2022-12-13 18:39:01,148 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 58 transitions, 413 flow [2022-12-13 18:39:01,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 89.64) internal successors, (2241), 25 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:01,149 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:39:01,149 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-13 18:39:01,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 18:39:01,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:39:01,351 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:39:01,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:39:01,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1494782254, now seen corresponding path program 2 times [2022-12-13 18:39:01,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:39:01,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315699601] [2022-12-13 18:39:01,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:39:01,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:39:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:39:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:39:01,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:39:01,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315699601] [2022-12-13 18:39:01,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315699601] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:39:01,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125760032] [2022-12-13 18:39:01,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:39:01,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:39:01,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:39:01,714 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:39:01,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 18:39:01,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:39:01,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:39:01,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 18:39:01,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:39:01,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:39:01,870 INFO L350 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 12 treesize of output 14 [2022-12-13 18:39:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:39:02,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:39:02,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125760032] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:39:02,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:39:02,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2022-12-13 18:39:02,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068756836] [2022-12-13 18:39:02,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:39:02,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 18:39:02,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:39:02,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 18:39:02,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-12-13 18:39:02,173 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 213 [2022-12-13 18:39:02,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 58 transitions, 413 flow. Second operand has 9 states, 9 states have (on average 94.44444444444444) internal successors, (850), 9 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:02,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:39:02,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 213 [2022-12-13 18:39:02,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:39:02,675 INFO L130 PetriNetUnfolder]: 1146/2352 cut-off events. [2022-12-13 18:39:02,675 INFO L131 PetriNetUnfolder]: For 6655/6655 co-relation queries the response was YES. [2022-12-13 18:39:02,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8732 conditions, 2352 events. 1146/2352 cut-off events. For 6655/6655 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 11317 event pairs, 0 based on Foata normal form. 54/2384 useless extension candidates. Maximal degree in co-relation 8696. Up to 584 conditions per place. [2022-12-13 18:39:02,697 INFO L137 encePairwiseOnDemand]: 209/213 looper letters, 190 selfloop transitions, 6 changer transitions 0/197 dead transitions. [2022-12-13 18:39:02,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 197 transitions, 1847 flow [2022-12-13 18:39:02,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:39:02,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 18:39:02,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 840 transitions. [2022-12-13 18:39:02,699 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49295774647887325 [2022-12-13 18:39:02,699 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 840 transitions. [2022-12-13 18:39:02,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 840 transitions. [2022-12-13 18:39:02,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:39:02,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 840 transitions. [2022-12-13 18:39:02,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 105.0) internal successors, (840), 8 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:02,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 213.0) internal successors, (1917), 9 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:02,702 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 213.0) internal successors, (1917), 9 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:02,702 INFO L175 Difference]: Start difference. First operand has 97 places, 58 transitions, 413 flow. Second operand 8 states and 840 transitions. [2022-12-13 18:39:02,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 197 transitions, 1847 flow [2022-12-13 18:39:02,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 197 transitions, 1617 flow, removed 78 selfloop flow, removed 7 redundant places. [2022-12-13 18:39:02,712 INFO L231 Difference]: Finished difference. Result has 96 places, 56 transitions, 359 flow [2022-12-13 18:39:02,712 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=359, PETRI_PLACES=96, PETRI_TRANSITIONS=56} [2022-12-13 18:39:02,712 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 60 predicate places. [2022-12-13 18:39:02,713 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 56 transitions, 359 flow [2022-12-13 18:39:02,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 94.44444444444444) internal successors, (850), 9 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:02,713 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:39:02,713 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-12-13 18:39:02,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 18:39:02,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 18:39:02,915 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:39:02,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:39:02,916 INFO L85 PathProgramCache]: Analyzing trace with hash 2013370906, now seen corresponding path program 3 times [2022-12-13 18:39:02,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:39:02,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824787571] [2022-12-13 18:39:02,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:39:02,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:39:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:39:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 153 proven. 37 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 18:39:03,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:39:03,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824787571] [2022-12-13 18:39:03,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824787571] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:39:03,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251782150] [2022-12-13 18:39:03,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:39:03,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:39:03,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:39:03,149 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:39:03,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 18:39:03,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 18:39:03,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:39:03,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 18:39:03,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:39:03,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:39:03,323 INFO L350 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 12 treesize of output 14 [2022-12-13 18:39:03,528 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-12-13 18:39:03,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:39:03,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251782150] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:39:03,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:39:03,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2022-12-13 18:39:03,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486118567] [2022-12-13 18:39:03,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:39:03,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:39:03,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:39:03,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:39:03,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-12-13 18:39:03,753 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 213 [2022-12-13 18:39:03,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 56 transitions, 359 flow. Second operand has 7 states, 7 states have (on average 92.0) internal successors, (644), 7 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:03,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:39:03,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 213 [2022-12-13 18:39:03,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:39:04,148 INFO L130 PetriNetUnfolder]: 1124/2308 cut-off events. [2022-12-13 18:39:04,148 INFO L131 PetriNetUnfolder]: For 6331/6331 co-relation queries the response was YES. [2022-12-13 18:39:04,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8228 conditions, 2308 events. 1124/2308 cut-off events. For 6331/6331 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 10612 event pairs, 21 based on Foata normal form. 22/2308 useless extension candidates. Maximal degree in co-relation 8192. Up to 2086 conditions per place. [2022-12-13 18:39:04,158 INFO L137 encePairwiseOnDemand]: 208/213 looper letters, 85 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2022-12-13 18:39:04,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 90 transitions, 759 flow [2022-12-13 18:39:04,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:39:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 18:39:04,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 585 transitions. [2022-12-13 18:39:04,160 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45774647887323944 [2022-12-13 18:39:04,160 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 585 transitions. [2022-12-13 18:39:04,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 585 transitions. [2022-12-13 18:39:04,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:39:04,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 585 transitions. [2022-12-13 18:39:04,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 97.5) internal successors, (585), 6 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:04,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 213.0) internal successors, (1491), 7 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:04,162 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 213.0) internal successors, (1491), 7 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:04,162 INFO L175 Difference]: Start difference. First operand has 96 places, 56 transitions, 359 flow. Second operand 6 states and 585 transitions. [2022-12-13 18:39:04,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 90 transitions, 759 flow [2022-12-13 18:39:04,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 90 transitions, 719 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-12-13 18:39:04,169 INFO L231 Difference]: Finished difference. Result has 94 places, 56 transitions, 338 flow [2022-12-13 18:39:04,169 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=338, PETRI_PLACES=94, PETRI_TRANSITIONS=56} [2022-12-13 18:39:04,169 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 58 predicate places. [2022-12-13 18:39:04,169 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 56 transitions, 338 flow [2022-12-13 18:39:04,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 92.0) internal successors, (644), 7 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:04,169 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:39:04,169 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:39:04,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 18:39:04,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 18:39:04,371 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:39:04,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:39:04,372 INFO L85 PathProgramCache]: Analyzing trace with hash 147393482, now seen corresponding path program 1 times [2022-12-13 18:39:04,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:39:04,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792679508] [2022-12-13 18:39:04,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:39:04,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:39:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:39:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-12-13 18:39:04,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:39:04,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792679508] [2022-12-13 18:39:04,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792679508] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:39:04,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:39:04,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:39:04,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957322666] [2022-12-13 18:39:04,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:39:04,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:39:04,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:39:04,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:39:04,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:39:04,586 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 213 [2022-12-13 18:39:04,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 56 transitions, 338 flow. Second operand has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:04,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:39:04,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 213 [2022-12-13 18:39:04,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:39:04,957 INFO L130 PetriNetUnfolder]: 1102/2239 cut-off events. [2022-12-13 18:39:04,958 INFO L131 PetriNetUnfolder]: For 4582/4582 co-relation queries the response was YES. [2022-12-13 18:39:04,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8033 conditions, 2239 events. 1102/2239 cut-off events. For 4582/4582 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 10096 event pairs, 1008 based on Foata normal form. 0/2239 useless extension candidates. Maximal degree in co-relation 7997. Up to 2158 conditions per place. [2022-12-13 18:39:04,970 INFO L137 encePairwiseOnDemand]: 209/213 looper letters, 56 selfloop transitions, 4 changer transitions 2/63 dead transitions. [2022-12-13 18:39:04,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 63 transitions, 508 flow [2022-12-13 18:39:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:39:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:39:04,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 396 transitions. [2022-12-13 18:39:04,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4647887323943662 [2022-12-13 18:39:04,972 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 396 transitions. [2022-12-13 18:39:04,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 396 transitions. [2022-12-13 18:39:04,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:39:04,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 396 transitions. [2022-12-13 18:39:04,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:04,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 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) [2022-12-13 18:39:04,975 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 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) [2022-12-13 18:39:04,975 INFO L175 Difference]: Start difference. First operand has 94 places, 56 transitions, 338 flow. Second operand 4 states and 396 transitions. [2022-12-13 18:39:04,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 63 transitions, 508 flow [2022-12-13 18:39:04,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 63 transitions, 503 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 18:39:04,982 INFO L231 Difference]: Finished difference. Result has 93 places, 53 transitions, 319 flow [2022-12-13 18:39:04,983 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=319, PETRI_PLACES=93, PETRI_TRANSITIONS=53} [2022-12-13 18:39:04,983 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 57 predicate places. [2022-12-13 18:39:04,983 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 53 transitions, 319 flow [2022-12-13 18:39:04,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:04,983 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:39:04,984 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:39:04,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 18:39:04,984 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-13 18:39:04,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:39:04,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1277668107, now seen corresponding path program 1 times [2022-12-13 18:39:04,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:39:04,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156038353] [2022-12-13 18:39:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:39:04,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:39:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:39:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-12-13 18:39:05,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:39:05,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156038353] [2022-12-13 18:39:05,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156038353] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:39:05,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:39:05,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:39:05,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465394416] [2022-12-13 18:39:05,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:39:05,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:39:05,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:39:05,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:39:05,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:39:05,243 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 213 [2022-12-13 18:39:05,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 53 transitions, 319 flow. Second operand has 6 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:05,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:39:05,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 213 [2022-12-13 18:39:05,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:39:05,608 INFO L130 PetriNetUnfolder]: 1055/2134 cut-off events. [2022-12-13 18:39:05,608 INFO L131 PetriNetUnfolder]: For 3885/3885 co-relation queries the response was YES. [2022-12-13 18:39:05,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7555 conditions, 2134 events. 1055/2134 cut-off events. For 3885/3885 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 10396 event pairs, 48 based on Foata normal form. 10/2144 useless extension candidates. Maximal degree in co-relation 7519. Up to 1820 conditions per place. [2022-12-13 18:39:05,613 INFO L137 encePairwiseOnDemand]: 204/213 looper letters, 0 selfloop transitions, 0 changer transitions 103/103 dead transitions. [2022-12-13 18:39:05,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 103 transitions, 817 flow [2022-12-13 18:39:05,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:39:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 18:39:05,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 637 transitions. [2022-12-13 18:39:05,615 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4272300469483568 [2022-12-13 18:39:05,615 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 637 transitions. [2022-12-13 18:39:05,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 637 transitions. [2022-12-13 18:39:05,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:39:05,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 637 transitions. [2022-12-13 18:39:05,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:05,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 213.0) internal successors, (1704), 8 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:05,618 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 213.0) internal successors, (1704), 8 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:05,618 INFO L175 Difference]: Start difference. First operand has 93 places, 53 transitions, 319 flow. Second operand 7 states and 637 transitions. [2022-12-13 18:39:05,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 103 transitions, 817 flow [2022-12-13 18:39:05,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 103 transitions, 784 flow, removed 2 selfloop flow, removed 8 redundant places. [2022-12-13 18:39:05,625 INFO L231 Difference]: Finished difference. Result has 88 places, 0 transitions, 0 flow [2022-12-13 18:39:05,625 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=88, PETRI_TRANSITIONS=0} [2022-12-13 18:39:05,625 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 52 predicate places. [2022-12-13 18:39:05,625 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 0 transitions, 0 flow [2022-12-13 18:39:05,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:05,627 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 20 remaining) [2022-12-13 18:39:05,627 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2022-12-13 18:39:05,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2022-12-13 18:39:05,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2022-12-13 18:39:05,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2022-12-13 18:39:05,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2022-12-13 18:39:05,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2022-12-13 18:39:05,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2022-12-13 18:39:05,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2022-12-13 18:39:05,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2022-12-13 18:39:05,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (9 of 20 remaining) [2022-12-13 18:39:05,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 20 remaining) [2022-12-13 18:39:05,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 20 remaining) [2022-12-13 18:39:05,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 20 remaining) [2022-12-13 18:39:05,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 20 remaining) [2022-12-13 18:39:05,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 20 remaining) [2022-12-13 18:39:05,629 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 20 remaining) [2022-12-13 18:39:05,629 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 20 remaining) [2022-12-13 18:39:05,629 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 20 remaining) [2022-12-13 18:39:05,629 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 20 remaining) [2022-12-13 18:39:05,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 18:39:05,629 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:39:05,633 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-13 18:39:05,633 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 18:39:05,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 06:39:05 BasicIcfg [2022-12-13 18:39:05,635 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 18:39:05,635 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 18:39:05,635 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 18:39:05,635 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 18:39:05,636 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:38:45" (3/4) ... [2022-12-13 18:39:05,637 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-13 18:39:05,641 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2022-12-13 18:39:05,644 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-12-13 18:39:05,644 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-13 18:39:05,644 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-13 18:39:05,664 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 18:39:05,664 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 18:39:05,665 INFO L158 Benchmark]: Toolchain (without parser) took 20635.47ms. Allocated memory was 136.3MB in the beginning and 287.3MB in the end (delta: 151.0MB). Free memory was 99.9MB in the beginning and 64.8MB in the end (delta: 35.1MB). Peak memory consumption was 187.1MB. Max. memory is 16.1GB. [2022-12-13 18:39:05,665 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 136.3MB. Free memory is still 107.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 18:39:05,665 INFO L158 Benchmark]: CACSL2BoogieTranslator took 437.46ms. Allocated memory is still 136.3MB. Free memory was 99.5MB in the beginning and 71.9MB in the end (delta: 27.6MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2022-12-13 18:39:05,665 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.56ms. Allocated memory is still 136.3MB. Free memory was 71.9MB in the beginning and 69.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 18:39:05,665 INFO L158 Benchmark]: Boogie Preprocessor took 20.21ms. Allocated memory is still 136.3MB. Free memory was 69.7MB in the beginning and 68.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 18:39:05,665 INFO L158 Benchmark]: RCFGBuilder took 339.64ms. Allocated memory is still 136.3MB. Free memory was 68.1MB in the beginning and 52.7MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-13 18:39:05,666 INFO L158 Benchmark]: TraceAbstraction took 19766.39ms. Allocated memory was 136.3MB in the beginning and 287.3MB in the end (delta: 151.0MB). Free memory was 106.7MB in the beginning and 66.9MB in the end (delta: 39.8MB). Peak memory consumption was 189.2MB. Max. memory is 16.1GB. [2022-12-13 18:39:05,666 INFO L158 Benchmark]: Witness Printer took 29.15ms. Allocated memory is still 287.3MB. Free memory was 66.9MB in the beginning and 64.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 18:39:05,667 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 136.3MB. Free memory is still 107.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 437.46ms. Allocated memory is still 136.3MB. Free memory was 99.5MB in the beginning and 71.9MB in the end (delta: 27.6MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.56ms. Allocated memory is still 136.3MB. Free memory was 71.9MB in the beginning and 69.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.21ms. Allocated memory is still 136.3MB. Free memory was 69.7MB in the beginning and 68.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 339.64ms. Allocated memory is still 136.3MB. Free memory was 68.1MB in the beginning and 52.7MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 19766.39ms. Allocated memory was 136.3MB in the beginning and 287.3MB in the end (delta: 151.0MB). Free memory was 106.7MB in the beginning and 66.9MB in the end (delta: 39.8MB). Peak memory consumption was 189.2MB. Max. memory is 16.1GB. * Witness Printer took 29.15ms. Allocated memory is still 287.3MB. Free memory was 66.9MB in the beginning and 64.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 101 PlacesBefore, 36 PlacesAfterwards, 103 TransitionsBefore, 35 TransitionsAfterwards, 2632 CoEnabledTransitionPairs, 4 FixpointIterations, 26 TrivialSequentialCompositions, 74 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 109 TotalNumberOfCompositions, 3774 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2545, independent: 2439, independent conditional: 0, independent unconditional: 2439, dependent: 106, dependent conditional: 0, dependent unconditional: 106, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1416, independent: 1384, independent conditional: 0, independent unconditional: 1384, dependent: 32, dependent conditional: 0, dependent unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2545, independent: 1055, independent conditional: 0, independent unconditional: 1055, dependent: 74, dependent conditional: 0, dependent unconditional: 74, unknown: 1416, unknown conditional: 0, unknown unconditional: 1416] , Statistics on independence cache: Total cache size (in pairs): 52, Positive cache size: 39, Positive conditional cache size: 0, Positive unconditional cache size: 39, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 931]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 127 locations, 20 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 19.7s, OverallIterations: 16, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 8.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3811 SdHoareTripleChecker+Valid, 5.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3194 mSDsluCounter, 969 SdHoareTripleChecker+Invalid, 4.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 893 mSDsCounter, 191 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9255 IncrementalHoareTripleChecker+Invalid, 9446 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 191 mSolverCounterUnsat, 76 mSDtfsCounter, 9255 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 354 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=413occurred in iteration=12, InterpolantAutomatonStates: 97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.3s InterpolantComputationTime, 541 NumberOfCodeBlocks, 503 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 596 ConstructedInterpolants, 33 QuantifiedInterpolants, 7166 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1374 ConjunctsInSsa, 136 ConjunctsInUnsatCore, 29 InterpolantComputations, 11 PerfectInterpolantSequences, 1797/1986 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 15 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-13 18:39:05,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3489cea8-2d0f-4095-8d1c-d0a516ee7421/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE