./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 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/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_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:47:16,393 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:47:16,577 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:47:16,588 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:47:16,589 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:47:16,632 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:47:16,633 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:47:16,633 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:47:16,634 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:47:16,639 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:47:16,640 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:47:16,641 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:47:16,642 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:47:16,644 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:47:16,644 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:47:16,645 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:47:16,645 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:47:16,646 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:47:16,646 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:47:16,646 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:47:16,647 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:47:16,647 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:47:16,648 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:47:16,648 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:47:16,649 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:47:16,649 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:47:16,650 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:47:16,650 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:47:16,651 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:47:16,651 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:47:16,653 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:47:16,653 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:47:16,653 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:47:16,654 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:47:16,654 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:47:16,654 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:47:16,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:47:16,655 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:47:16,655 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:47:16,655 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:47:16,656 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:47:16,656 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a [2023-11-26 11:47:17,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:47:17,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:47:17,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:47:17,067 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:47:17,068 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:47:17,070 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i [2023-11-26 11:47:20,372 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:47:20,822 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:47:20,823 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i [2023-11-26 11:47:20,849 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/data/9496d2b39/71ca491d603b4e25bab8502e7ff34bdf/FLAGb89e1cb44 [2023-11-26 11:47:20,882 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/data/9496d2b39/71ca491d603b4e25bab8502e7ff34bdf [2023-11-26 11:47:20,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:47:20,887 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:47:20,889 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:47:20,890 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:47:20,898 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:47:20,899 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:47:20" (1/1) ... [2023-11-26 11:47:20,900 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c777c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:20, skipping insertion in model container [2023-11-26 11:47:20,900 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:47:20" (1/1) ... [2023-11-26 11:47:20,981 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:47:21,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:47:21,722 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:47:21,777 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:47:21,847 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:47:21,847 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:21 WrapperNode [2023-11-26 11:47:21,848 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:47:21,849 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:47:21,849 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:47:21,850 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:47:21,860 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:21" (1/1) ... [2023-11-26 11:47:21,902 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:21" (1/1) ... [2023-11-26 11:47:21,984 INFO L138 Inliner]: procedures = 263, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 88 [2023-11-26 11:47:21,985 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:47:21,986 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:47:21,986 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:47:21,986 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:47:22,001 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:21" (1/1) ... [2023-11-26 11:47:22,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:21" (1/1) ... [2023-11-26 11:47:22,013 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:21" (1/1) ... [2023-11-26 11:47:22,031 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [1, 7]. 88 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 5 writes are split as follows [1, 4]. [2023-11-26 11:47:22,032 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:21" (1/1) ... [2023-11-26 11:47:22,032 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:21" (1/1) ... [2023-11-26 11:47:22,041 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:21" (1/1) ... [2023-11-26 11:47:22,045 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:21" (1/1) ... [2023-11-26 11:47:22,047 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:21" (1/1) ... [2023-11-26 11:47:22,049 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:21" (1/1) ... [2023-11-26 11:47:22,053 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:47:22,054 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:47:22,054 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:47:22,054 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:47:22,055 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:21" (1/1) ... [2023-11-26 11:47:22,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:47:22,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:22,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:47:22,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:47:22,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:47:22,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:47:22,162 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 11:47:22,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:47:22,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:47:22,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:47:22,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:47:22,163 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 11:47:22,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:47:22,163 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-26 11:47:22,163 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-26 11:47:22,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:47:22,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:47:22,165 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:47:22,346 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:47:22,349 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:47:22,701 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:47:22,855 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:47:22,855 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 11:47:22,856 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:47:22 BoogieIcfgContainer [2023-11-26 11:47:22,856 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:47:22,859 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:47:22,859 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:47:22,864 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:47:22,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:47:20" (1/3) ... [2023-11-26 11:47:22,865 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b182b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:47:22, skipping insertion in model container [2023-11-26 11:47:22,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:21" (2/3) ... [2023-11-26 11:47:22,866 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b182b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:47:22, skipping insertion in model container [2023-11-26 11:47:22,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:47:22" (3/3) ... [2023-11-26 11:47:22,868 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_05-funloop_hard2.i [2023-11-26 11:47:22,890 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:47:22,891 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-11-26 11:47:22,891 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:47:22,956 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-26 11:47:22,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 46 transitions, 96 flow [2023-11-26 11:47:23,032 INFO L124 PetriNetUnfolderBase]: 3/45 cut-off events. [2023-11-26 11:47:23,032 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:47:23,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 45 events. 3/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 127 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-11-26 11:47:23,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 46 transitions, 96 flow [2023-11-26 11:47:23,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 45 transitions, 93 flow [2023-11-26 11:47:23,052 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:47:23,065 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;@2a52d0e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:47:23,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-26 11:47:23,068 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:47:23,069 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-26 11:47:23,069 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:47:23,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:23,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:47:23,070 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:47:23,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:23,079 INFO L85 PathProgramCache]: Analyzing trace with hash 279294, now seen corresponding path program 1 times [2023-11-26 11:47:23,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:23,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107230759] [2023-11-26 11:47:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:23,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:23,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:23,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107230759] [2023-11-26 11:47:23,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107230759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:23,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:23,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:47:23,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33911458] [2023-11-26 11:47:23,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:23,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:47:23,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:23,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:47:23,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:23,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-26 11:47:23,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:23,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:23,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-26 11:47:23,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:23,615 INFO L124 PetriNetUnfolderBase]: 114/320 cut-off events. [2023-11-26 11:47:23,615 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 11:47:23,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554 conditions, 320 events. 114/320 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1625 event pairs, 91 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 536. Up to 229 conditions per place. [2023-11-26 11:47:23,624 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 25 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-11-26 11:47:23,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 149 flow [2023-11-26 11:47:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:47:23,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:47:23,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-26 11:47:23,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2023-11-26 11:47:23,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-26 11:47:23,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-26 11:47:23,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:23,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-26 11:47:23,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:23,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:23,651 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:23,653 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 93 flow. Second operand 3 states and 88 transitions. [2023-11-26 11:47:23,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 149 flow [2023-11-26 11:47:23,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:47:23,660 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 104 flow [2023-11-26 11:47:23,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-11-26 11:47:23,666 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-11-26 11:47:23,666 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 104 flow [2023-11-26 11:47:23,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:23,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:23,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-26 11:47:23,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:47:23,668 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:47:23,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:23,668 INFO L85 PathProgramCache]: Analyzing trace with hash 8657292, now seen corresponding path program 1 times [2023-11-26 11:47:23,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:23,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946882244] [2023-11-26 11:47:23,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:23,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:23,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:23,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946882244] [2023-11-26 11:47:23,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946882244] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:23,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437334500] [2023-11-26 11:47:23,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:23,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:23,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:23,802 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:23,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:47:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:23,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:47:23,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:23,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:23,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437334500] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:23,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:23,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-26 11:47:23,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461309172] [2023-11-26 11:47:23,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:23,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:47:23,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:23,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:47:23,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:47:23,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-26 11:47:23,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 104 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:23,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:24,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-26 11:47:24,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:24,202 INFO L124 PetriNetUnfolderBase]: 114/323 cut-off events. [2023-11-26 11:47:24,202 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:47:24,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569 conditions, 323 events. 114/323 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1625 event pairs, 91 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 558. Up to 229 conditions per place. [2023-11-26 11:47:24,208 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 25 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-11-26 11:47:24,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 176 flow [2023-11-26 11:47:24,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:47:24,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:47:24,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2023-11-26 11:47:24,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543478260869565 [2023-11-26 11:47:24,216 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 153 transitions. [2023-11-26 11:47:24,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 153 transitions. [2023-11-26 11:47:24,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:24,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 153 transitions. [2023-11-26 11:47:24,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:24,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 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) [2023-11-26 11:47:24,228 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 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) [2023-11-26 11:47:24,228 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 104 flow. Second operand 6 states and 153 transitions. [2023-11-26 11:47:24,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 176 flow [2023-11-26 11:47:24,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 172 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 11:47:24,238 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 136 flow [2023-11-26 11:47:24,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=136, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-11-26 11:47:24,239 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2023-11-26 11:47:24,239 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 136 flow [2023-11-26 11:47:24,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:24,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:24,240 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-26 11:47:24,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:47:24,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:24,448 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:47:24,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:24,449 INFO L85 PathProgramCache]: Analyzing trace with hash 210531966, now seen corresponding path program 2 times [2023-11-26 11:47:24,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:24,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840688198] [2023-11-26 11:47:24,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:24,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:47:24,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:24,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840688198] [2023-11-26 11:47:24,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840688198] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:24,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:24,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:47:24,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991111980] [2023-11-26 11:47:24,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:24,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:47:24,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:24,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:47:24,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:24,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2023-11-26 11:47:24,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:24,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:24,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2023-11-26 11:47:24,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:24,679 INFO L124 PetriNetUnfolderBase]: 114/322 cut-off events. [2023-11-26 11:47:24,680 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:47:24,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 322 events. 114/322 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1627 event pairs, 77 based on Foata normal form. 0/266 useless extension candidates. Maximal degree in co-relation 549. Up to 195 conditions per place. [2023-11-26 11:47:24,684 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 37 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-11-26 11:47:24,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 56 transitions, 228 flow [2023-11-26 11:47:24,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:47:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:47:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2023-11-26 11:47:24,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2023-11-26 11:47:24,686 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 90 transitions. [2023-11-26 11:47:24,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 90 transitions. [2023-11-26 11:47:24,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:24,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 90 transitions. [2023-11-26 11:47:24,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:24,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:24,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:24,688 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 136 flow. Second operand 3 states and 90 transitions. [2023-11-26 11:47:24,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 56 transitions, 228 flow [2023-11-26 11:47:24,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 214 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-26 11:47:24,692 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 124 flow [2023-11-26 11:47:24,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-11-26 11:47:24,694 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2023-11-26 11:47:24,694 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 124 flow [2023-11-26 11:47:24,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:24,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:24,694 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-26 11:47:24,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:47:24,695 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:47:24,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:24,695 INFO L85 PathProgramCache]: Analyzing trace with hash 210531967, now seen corresponding path program 1 times [2023-11-26 11:47:24,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:24,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849166243] [2023-11-26 11:47:24,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:24,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:24,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:24,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849166243] [2023-11-26 11:47:24,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849166243] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:24,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556492959] [2023-11-26 11:47:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:24,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:24,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:24,872 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:24,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:47:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:24,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:47:24,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:24,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:25,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556492959] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:25,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:25,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-26 11:47:25,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970795661] [2023-11-26 11:47:25,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:25,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:47:25,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:25,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:47:25,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:47:25,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-26 11:47:25,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 124 flow. Second operand has 13 states, 13 states have (on average 21.076923076923077) internal successors, (274), 13 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:25,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:25,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-26 11:47:25,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:25,267 INFO L124 PetriNetUnfolderBase]: 114/328 cut-off events. [2023-11-26 11:47:25,268 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-26 11:47:25,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 328 events. 114/328 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1630 event pairs, 91 based on Foata normal form. 6/277 useless extension candidates. Maximal degree in co-relation 557. Up to 229 conditions per place. [2023-11-26 11:47:25,273 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 25 selfloop transitions, 11 changer transitions 0/54 dead transitions. [2023-11-26 11:47:25,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 54 transitions, 232 flow [2023-11-26 11:47:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:47:25,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 11:47:25,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 282 transitions. [2023-11-26 11:47:25,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108695652173914 [2023-11-26 11:47:25,279 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 282 transitions. [2023-11-26 11:47:25,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 282 transitions. [2023-11-26 11:47:25,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:25,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 282 transitions. [2023-11-26 11:47:25,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 23.5) internal successors, (282), 12 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:25,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 46.0) internal successors, (598), 13 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:25,286 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 46.0) internal successors, (598), 13 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:25,287 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 124 flow. Second operand 12 states and 282 transitions. [2023-11-26 11:47:25,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 54 transitions, 232 flow [2023-11-26 11:47:25,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:47:25,294 INFO L231 Difference]: Finished difference. Result has 70 places, 54 transitions, 204 flow [2023-11-26 11:47:25,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=204, PETRI_PLACES=70, PETRI_TRANSITIONS=54} [2023-11-26 11:47:25,297 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 24 predicate places. [2023-11-26 11:47:25,301 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 54 transitions, 204 flow [2023-11-26 11:47:25,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.076923076923077) internal successors, (274), 13 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:25,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:25,303 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-26 11:47:25,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:25,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:25,512 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:47:25,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:25,513 INFO L85 PathProgramCache]: Analyzing trace with hash -222561345, now seen corresponding path program 2 times [2023-11-26 11:47:25,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:25,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632586024] [2023-11-26 11:47:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:25,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:47:25,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:25,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632586024] [2023-11-26 11:47:25,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632586024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:25,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:25,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:47:25,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461239707] [2023-11-26 11:47:25,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:25,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:47:25,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:25,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:47:25,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:25,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2023-11-26 11:47:25,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 54 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:25,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:25,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2023-11-26 11:47:25,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:25,838 INFO L124 PetriNetUnfolderBase]: 114/327 cut-off events. [2023-11-26 11:47:25,839 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-26 11:47:25,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 327 events. 114/327 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1631 event pairs, 77 based on Foata normal form. 1/272 useless extension candidates. Maximal degree in co-relation 553. Up to 194 conditions per place. [2023-11-26 11:47:25,842 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 42 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-11-26 11:47:25,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 61 transitions, 306 flow [2023-11-26 11:47:25,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:47:25,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:47:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2023-11-26 11:47:25,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-26 11:47:25,844 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2023-11-26 11:47:25,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2023-11-26 11:47:25,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:25,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2023-11-26 11:47:25,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:25,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:25,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:25,846 INFO L175 Difference]: Start difference. First operand has 70 places, 54 transitions, 204 flow. Second operand 3 states and 92 transitions. [2023-11-26 11:47:25,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 61 transitions, 306 flow [2023-11-26 11:47:25,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 61 transitions, 258 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-26 11:47:25,852 INFO L231 Difference]: Finished difference. Result has 66 places, 53 transitions, 158 flow [2023-11-26 11:47:25,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=66, PETRI_TRANSITIONS=53} [2023-11-26 11:47:25,856 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 20 predicate places. [2023-11-26 11:47:25,856 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 53 transitions, 158 flow [2023-11-26 11:47:25,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:25,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:25,861 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:25,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:47:25,861 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:47:25,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:25,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1756052659, now seen corresponding path program 1 times [2023-11-26 11:47:25,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:25,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787503942] [2023-11-26 11:47:25,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:25,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:47:26,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:26,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787503942] [2023-11-26 11:47:26,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787503942] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:26,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:26,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:47:26,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474117796] [2023-11-26 11:47:26,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:26,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:47:26,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:26,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:47:26,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:47:26,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2023-11-26 11:47:26,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 53 transitions, 158 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:26,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:26,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2023-11-26 11:47:26,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:26,718 INFO L124 PetriNetUnfolderBase]: 226/567 cut-off events. [2023-11-26 11:47:26,719 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-11-26 11:47:26,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1085 conditions, 567 events. 226/567 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2860 event pairs, 77 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 1034. Up to 242 conditions per place. [2023-11-26 11:47:26,725 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 77 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2023-11-26 11:47:26,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 101 transitions, 434 flow [2023-11-26 11:47:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:47:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 11:47:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2023-11-26 11:47:26,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592391304347826 [2023-11-26 11:47:26,727 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 218 transitions. [2023-11-26 11:47:26,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 218 transitions. [2023-11-26 11:47:26,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:26,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 218 transitions. [2023-11-26 11:47:26,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 27.25) internal successors, (218), 8 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:26,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:26,730 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:26,730 INFO L175 Difference]: Start difference. First operand has 66 places, 53 transitions, 158 flow. Second operand 8 states and 218 transitions. [2023-11-26 11:47:26,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 101 transitions, 434 flow [2023-11-26 11:47:26,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 101 transitions, 426 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:47:26,735 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 218 flow [2023-11-26 11:47:26,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=218, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2023-11-26 11:47:26,736 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 27 predicate places. [2023-11-26 11:47:26,737 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 218 flow [2023-11-26 11:47:26,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:26,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:26,737 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:26,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:47:26,738 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:47:26,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:26,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1756052658, now seen corresponding path program 1 times [2023-11-26 11:47:26,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:26,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376727258] [2023-11-26 11:47:26,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:26,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:47:26,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:26,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376727258] [2023-11-26 11:47:26,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376727258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:26,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:26,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:47:26,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78642183] [2023-11-26 11:47:26,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:26,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:47:26,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:26,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:47:26,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:47:27,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2023-11-26 11:47:27,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 218 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:27,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:27,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2023-11-26 11:47:27,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:27,275 INFO L124 PetriNetUnfolderBase]: 212/537 cut-off events. [2023-11-26 11:47:27,276 INFO L125 PetriNetUnfolderBase]: For 238/238 co-relation queries the response was YES. [2023-11-26 11:47:27,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 537 events. 212/537 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2643 event pairs, 37 based on Foata normal form. 0/495 useless extension candidates. Maximal degree in co-relation 1212. Up to 240 conditions per place. [2023-11-26 11:47:27,282 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 56 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2023-11-26 11:47:27,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 83 transitions, 433 flow [2023-11-26 11:47:27,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:47:27,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:47:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2023-11-26 11:47:27,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543478260869565 [2023-11-26 11:47:27,286 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 153 transitions. [2023-11-26 11:47:27,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 153 transitions. [2023-11-26 11:47:27,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:27,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 153 transitions. [2023-11-26 11:47:27,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:27,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 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) [2023-11-26 11:47:27,289 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 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) [2023-11-26 11:47:27,289 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 218 flow. Second operand 6 states and 153 transitions. [2023-11-26 11:47:27,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 83 transitions, 433 flow [2023-11-26 11:47:27,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 83 transitions, 432 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:47:27,296 INFO L231 Difference]: Finished difference. Result has 78 places, 63 transitions, 316 flow [2023-11-26 11:47:27,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=316, PETRI_PLACES=78, PETRI_TRANSITIONS=63} [2023-11-26 11:47:27,297 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 32 predicate places. [2023-11-26 11:47:27,298 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 63 transitions, 316 flow [2023-11-26 11:47:27,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:27,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:27,298 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:27,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:47:27,299 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:47:27,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:27,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1729905909, now seen corresponding path program 1 times [2023-11-26 11:47:27,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:27,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025225579] [2023-11-26 11:47:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:27,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:47:27,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:27,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025225579] [2023-11-26 11:47:27,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025225579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:27,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:27,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:47:27,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150149732] [2023-11-26 11:47:27,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:27,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:47:27,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:27,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:47:27,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:47:27,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2023-11-26 11:47:27,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 63 transitions, 316 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:27,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:27,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2023-11-26 11:47:27,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:27,750 INFO L124 PetriNetUnfolderBase]: 208/534 cut-off events. [2023-11-26 11:47:27,751 INFO L125 PetriNetUnfolderBase]: For 585/585 co-relation queries the response was YES. [2023-11-26 11:47:27,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1435 conditions, 534 events. 208/534 cut-off events. For 585/585 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2637 event pairs, 88 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 1375. Up to 198 conditions per place. [2023-11-26 11:47:27,757 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 57 selfloop transitions, 8 changer transitions 0/76 dead transitions. [2023-11-26 11:47:27,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 76 transitions, 518 flow [2023-11-26 11:47:27,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:47:27,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:47:27,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2023-11-26 11:47:27,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173913043478261 [2023-11-26 11:47:27,759 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 119 transitions. [2023-11-26 11:47:27,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 119 transitions. [2023-11-26 11:47:27,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:27,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 119 transitions. [2023-11-26 11:47:27,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:27,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:27,762 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:27,762 INFO L175 Difference]: Start difference. First operand has 78 places, 63 transitions, 316 flow. Second operand 5 states and 119 transitions. [2023-11-26 11:47:27,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 76 transitions, 518 flow [2023-11-26 11:47:27,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 76 transitions, 517 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:47:27,768 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 327 flow [2023-11-26 11:47:27,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=327, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2023-11-26 11:47:27,772 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 33 predicate places. [2023-11-26 11:47:27,772 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 327 flow [2023-11-26 11:47:27,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:27,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:27,773 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:27,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:47:27,774 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:47:27,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:27,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1729905910, now seen corresponding path program 1 times [2023-11-26 11:47:27,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:27,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424929714] [2023-11-26 11:47:27,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:27,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:47:28,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:28,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424929714] [2023-11-26 11:47:28,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424929714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:28,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:28,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:47:28,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490745764] [2023-11-26 11:47:28,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:28,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:47:28,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:28,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:47:28,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:47:28,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2023-11-26 11:47:28,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 327 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:28,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:28,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2023-11-26 11:47:28,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:28,524 INFO L124 PetriNetUnfolderBase]: 320/737 cut-off events. [2023-11-26 11:47:28,525 INFO L125 PetriNetUnfolderBase]: For 1027/1027 co-relation queries the response was YES. [2023-11-26 11:47:28,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2082 conditions, 737 events. 320/737 cut-off events. For 1027/1027 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3475 event pairs, 158 based on Foata normal form. 14/723 useless extension candidates. Maximal degree in co-relation 2021. Up to 394 conditions per place. [2023-11-26 11:47:28,532 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 74 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2023-11-26 11:47:28,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 92 transitions, 643 flow [2023-11-26 11:47:28,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:47:28,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:47:28,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2023-11-26 11:47:28,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5688405797101449 [2023-11-26 11:47:28,535 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 157 transitions. [2023-11-26 11:47:28,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 157 transitions. [2023-11-26 11:47:28,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:28,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 157 transitions. [2023-11-26 11:47:28,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:28,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 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) [2023-11-26 11:47:28,538 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 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) [2023-11-26 11:47:28,538 INFO L175 Difference]: Start difference. First operand has 79 places, 61 transitions, 327 flow. Second operand 6 states and 157 transitions. [2023-11-26 11:47:28,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 92 transitions, 643 flow [2023-11-26 11:47:28,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 92 transitions, 623 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:47:28,546 INFO L231 Difference]: Finished difference. Result has 82 places, 63 transitions, 347 flow [2023-11-26 11:47:28,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=82, PETRI_TRANSITIONS=63} [2023-11-26 11:47:28,548 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 36 predicate places. [2023-11-26 11:47:28,548 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 63 transitions, 347 flow [2023-11-26 11:47:28,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:28,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:28,549 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:28,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:47:28,550 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:47:28,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:28,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1093524864, now seen corresponding path program 1 times [2023-11-26 11:47:28,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:28,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048478609] [2023-11-26 11:47:28,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:28,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:47:28,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:28,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048478609] [2023-11-26 11:47:28,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048478609] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:28,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227748914] [2023-11-26 11:47:28,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:28,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:28,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:28,985 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:29,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:47:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:29,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-26 11:47:29,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:29,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:47:29,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:47:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:47:29,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:47:29,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227748914] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:29,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:29,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2023-11-26 11:47:29,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495633854] [2023-11-26 11:47:29,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:29,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 11:47:29,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:29,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 11:47:29,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:47:30,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2023-11-26 11:47:30,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 63 transitions, 347 flow. Second operand has 20 states, 20 states have (on average 18.15) internal successors, (363), 20 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:30,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:30,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2023-11-26 11:47:30,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:31,819 INFO L124 PetriNetUnfolderBase]: 688/1567 cut-off events. [2023-11-26 11:47:31,819 INFO L125 PetriNetUnfolderBase]: For 2085/2089 co-relation queries the response was YES. [2023-11-26 11:47:31,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4537 conditions, 1567 events. 688/1567 cut-off events. For 2085/2089 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7983 event pairs, 83 based on Foata normal form. 214/1748 useless extension candidates. Maximal degree in co-relation 4474. Up to 232 conditions per place. [2023-11-26 11:47:31,836 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 215 selfloop transitions, 41 changer transitions 0/265 dead transitions. [2023-11-26 11:47:31,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 265 transitions, 1640 flow [2023-11-26 11:47:31,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-26 11:47:31,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-26 11:47:31,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 582 transitions. [2023-11-26 11:47:31,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575098814229249 [2023-11-26 11:47:31,840 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 582 transitions. [2023-11-26 11:47:31,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 582 transitions. [2023-11-26 11:47:31,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:31,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 582 transitions. [2023-11-26 11:47:31,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 26.454545454545453) internal successors, (582), 22 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:31,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 46.0) internal successors, (1058), 23 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:31,847 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 46.0) internal successors, (1058), 23 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:31,847 INFO L175 Difference]: Start difference. First operand has 82 places, 63 transitions, 347 flow. Second operand 22 states and 582 transitions. [2023-11-26 11:47:31,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 265 transitions, 1640 flow [2023-11-26 11:47:31,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 265 transitions, 1594 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:47:31,862 INFO L231 Difference]: Finished difference. Result has 113 places, 87 transitions, 708 flow [2023-11-26 11:47:31,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=708, PETRI_PLACES=113, PETRI_TRANSITIONS=87} [2023-11-26 11:47:31,863 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 67 predicate places. [2023-11-26 11:47:31,863 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 87 transitions, 708 flow [2023-11-26 11:47:31,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 18.15) internal successors, (363), 20 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:31,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:31,864 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:31,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:32,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:47:32,070 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:47:32,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:32,071 INFO L85 PathProgramCache]: Analyzing trace with hash -657382973, now seen corresponding path program 1 times [2023-11-26 11:47:32,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:32,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307881264] [2023-11-26 11:47:32,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:32,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:47:32,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:32,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307881264] [2023-11-26 11:47:32,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307881264] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:32,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800418058] [2023-11-26 11:47:32,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:32,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:32,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:32,562 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:32,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:47:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:32,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-26 11:47:32,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:32,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:47:32,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:47:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:47:32,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:47:33,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800418058] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:33,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:33,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2023-11-26 11:47:33,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336009497] [2023-11-26 11:47:33,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:33,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 11:47:33,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:33,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 11:47:33,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:47:34,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2023-11-26 11:47:34,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 87 transitions, 708 flow. Second operand has 20 states, 20 states have (on average 18.15) internal successors, (363), 20 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:34,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:34,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2023-11-26 11:47:34,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:35,353 INFO L124 PetriNetUnfolderBase]: 1275/2844 cut-off events. [2023-11-26 11:47:35,354 INFO L125 PetriNetUnfolderBase]: For 9786/9786 co-relation queries the response was YES. [2023-11-26 11:47:35,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9455 conditions, 2844 events. 1275/2844 cut-off events. For 9786/9786 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 15771 event pairs, 271 based on Foata normal form. 224/3036 useless extension candidates. Maximal degree in co-relation 9378. Up to 642 conditions per place. [2023-11-26 11:47:35,449 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 234 selfloop transitions, 24 changer transitions 0/266 dead transitions. [2023-11-26 11:47:35,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 266 transitions, 2858 flow [2023-11-26 11:47:35,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:47:35,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 11:47:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 349 transitions. [2023-11-26 11:47:35,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5836120401337793 [2023-11-26 11:47:35,452 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 349 transitions. [2023-11-26 11:47:35,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 349 transitions. [2023-11-26 11:47:35,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:35,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 349 transitions. [2023-11-26 11:47:35,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 26.846153846153847) internal successors, (349), 13 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:35,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 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) [2023-11-26 11:47:35,456 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 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) [2023-11-26 11:47:35,456 INFO L175 Difference]: Start difference. First operand has 113 places, 87 transitions, 708 flow. Second operand 13 states and 349 transitions. [2023-11-26 11:47:35,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 266 transitions, 2858 flow [2023-11-26 11:47:35,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 266 transitions, 2420 flow, removed 172 selfloop flow, removed 7 redundant places. [2023-11-26 11:47:35,488 INFO L231 Difference]: Finished difference. Result has 124 places, 93 transitions, 708 flow [2023-11-26 11:47:35,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=708, PETRI_PLACES=124, PETRI_TRANSITIONS=93} [2023-11-26 11:47:35,489 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 78 predicate places. [2023-11-26 11:47:35,489 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 93 transitions, 708 flow [2023-11-26 11:47:35,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 18.15) internal successors, (363), 20 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:35,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:35,490 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:35,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:35,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:35,697 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:47:35,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:35,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1012839283, now seen corresponding path program 2 times [2023-11-26 11:47:35,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:35,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587601546] [2023-11-26 11:47:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:35,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:47:36,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:36,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587601546] [2023-11-26 11:47:36,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587601546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:36,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742071761] [2023-11-26 11:47:36,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:47:36,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:36,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:36,451 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:36,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:47:36,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:47:36,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:36,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-26 11:47:36,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:36,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:47:36,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:47:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:47:37,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:47:37,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742071761] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:37,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:37,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 29 [2023-11-26 11:47:37,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30869073] [2023-11-26 11:47:37,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:37,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-26 11:47:37,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:37,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-26 11:47:37,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2023-11-26 11:47:39,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2023-11-26 11:47:39,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 93 transitions, 708 flow. Second operand has 31 states, 31 states have (on average 17.129032258064516) internal successors, (531), 31 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:39,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:39,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2023-11-26 11:47:39,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:44,406 INFO L124 PetriNetUnfolderBase]: 2680/5951 cut-off events. [2023-11-26 11:47:44,406 INFO L125 PetriNetUnfolderBase]: For 27733/27743 co-relation queries the response was YES. [2023-11-26 11:47:44,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19890 conditions, 5951 events. 2680/5951 cut-off events. For 27733/27743 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 35130 event pairs, 175 based on Foata normal form. 468/6419 useless extension candidates. Maximal degree in co-relation 19806. Up to 652 conditions per place. [2023-11-26 11:47:44,504 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 609 selfloop transitions, 89 changer transitions 0/706 dead transitions. [2023-11-26 11:47:44,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 706 transitions, 5550 flow [2023-11-26 11:47:44,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-26 11:47:44,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-26 11:47:44,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1118 transitions. [2023-11-26 11:47:44,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283553875236295 [2023-11-26 11:47:44,518 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 1118 transitions. [2023-11-26 11:47:44,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 1118 transitions. [2023-11-26 11:47:44,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:44,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 1118 transitions. [2023-11-26 11:47:44,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 24.304347826086957) internal successors, (1118), 46 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:44,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 46.0) internal successors, (2162), 47 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:44,529 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 46.0) internal successors, (2162), 47 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:44,529 INFO L175 Difference]: Start difference. First operand has 124 places, 93 transitions, 708 flow. Second operand 46 states and 1118 transitions. [2023-11-26 11:47:44,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 706 transitions, 5550 flow [2023-11-26 11:47:44,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 706 transitions, 5122 flow, removed 154 selfloop flow, removed 4 redundant places. [2023-11-26 11:47:44,696 INFO L231 Difference]: Finished difference. Result has 191 places, 144 transitions, 1527 flow [2023-11-26 11:47:44,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1527, PETRI_PLACES=191, PETRI_TRANSITIONS=144} [2023-11-26 11:47:44,697 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 145 predicate places. [2023-11-26 11:47:44,698 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 144 transitions, 1527 flow [2023-11-26 11:47:44,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 17.129032258064516) internal successors, (531), 31 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:44,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:44,699 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:44,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:44,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:44,906 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:47:44,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:44,907 INFO L85 PathProgramCache]: Analyzing trace with hash 2105064374, now seen corresponding path program 2 times [2023-11-26 11:47:44,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:44,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055370209] [2023-11-26 11:47:44,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:44,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:47:45,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:45,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055370209] [2023-11-26 11:47:45,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055370209] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:45,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445885568] [2023-11-26 11:47:45,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:47:45,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:45,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:45,676 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:45,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:47:45,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:47:45,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:45,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-26 11:47:45,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:45,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:47:45,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:47:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:47:46,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:47:47,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445885568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:47,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:47,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 29 [2023-11-26 11:47:47,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607166363] [2023-11-26 11:47:47,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:47,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-26 11:47:47,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:47,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-26 11:47:47,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2023-11-26 11:47:48,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2023-11-26 11:47:48,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 144 transitions, 1527 flow. Second operand has 31 states, 31 states have (on average 17.129032258064516) internal successors, (531), 31 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:48,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:48,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2023-11-26 11:47:48,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:53,645 INFO L124 PetriNetUnfolderBase]: 5157/11338 cut-off events. [2023-11-26 11:47:53,645 INFO L125 PetriNetUnfolderBase]: For 62050/62050 co-relation queries the response was YES. [2023-11-26 11:47:53,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40583 conditions, 11338 events. 5157/11338 cut-off events. For 62050/62050 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 73828 event pairs, 589 based on Foata normal form. 816/12154 useless extension candidates. Maximal degree in co-relation 40473. Up to 1362 conditions per place. [2023-11-26 11:47:53,806 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 768 selfloop transitions, 54 changer transitions 0/830 dead transitions. [2023-11-26 11:47:53,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 830 transitions, 10894 flow [2023-11-26 11:47:53,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-26 11:47:53,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-26 11:47:53,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 625 transitions. [2023-11-26 11:47:53,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2023-11-26 11:47:53,816 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 625 transitions. [2023-11-26 11:47:53,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 625 transitions. [2023-11-26 11:47:53,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:53,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 625 transitions. [2023-11-26 11:47:53,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 25.0) internal successors, (625), 25 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:53,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 46.0) internal successors, (1196), 26 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:53,824 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 46.0) internal successors, (1196), 26 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:53,824 INFO L175 Difference]: Start difference. First operand has 191 places, 144 transitions, 1527 flow. Second operand 25 states and 625 transitions. [2023-11-26 11:47:53,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 830 transitions, 10894 flow [2023-11-26 11:47:54,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 830 transitions, 9628 flow, removed 437 selfloop flow, removed 17 redundant places. [2023-11-26 11:47:54,070 INFO L231 Difference]: Finished difference. Result has 211 places, 157 transitions, 1660 flow [2023-11-26 11:47:54,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1660, PETRI_PLACES=211, PETRI_TRANSITIONS=157} [2023-11-26 11:47:54,072 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 165 predicate places. [2023-11-26 11:47:54,072 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 157 transitions, 1660 flow [2023-11-26 11:47:54,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 17.129032258064516) internal successors, (531), 31 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:54,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:54,073 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:54,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:54,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:47:54,279 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:47:54,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:54,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1356816854, now seen corresponding path program 3 times [2023-11-26 11:47:54,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:54,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038171354] [2023-11-26 11:47:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:54,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 291 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:47:54,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:54,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038171354] [2023-11-26 11:47:54,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038171354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:54,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932036206] [2023-11-26 11:47:54,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:47:54,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:54,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:54,701 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:54,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:47:55,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 11:47:55,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:55,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 11:47:55,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:55,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:47:55,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:47:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 64 proven. 30 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2023-11-26 11:47:55,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2023-11-26 11:47:56,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932036206] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:56,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:56,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 25 [2023-11-26 11:47:56,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197270739] [2023-11-26 11:47:56,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:56,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 11:47:56,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:56,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 11:47:56,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2023-11-26 11:47:57,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2023-11-26 11:47:57,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 157 transitions, 1660 flow. Second operand has 25 states, 25 states have (on average 18.32) internal successors, (458), 25 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:57,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:57,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2023-11-26 11:47:57,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:48:02,100 INFO L124 PetriNetUnfolderBase]: 4681/10358 cut-off events. [2023-11-26 11:48:02,101 INFO L125 PetriNetUnfolderBase]: For 46942/46942 co-relation queries the response was YES. [2023-11-26 11:48:02,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38333 conditions, 10358 events. 4681/10358 cut-off events. For 46942/46942 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 66584 event pairs, 0 based on Foata normal form. 68/10426 useless extension candidates. Maximal degree in co-relation 38209. Up to 1117 conditions per place. [2023-11-26 11:48:02,467 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 836 selfloop transitions, 53 changer transitions 1/898 dead transitions. [2023-11-26 11:48:02,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 898 transitions, 10695 flow [2023-11-26 11:48:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-26 11:48:02,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-26 11:48:02,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 651 transitions. [2023-11-26 11:48:02,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5241545893719807 [2023-11-26 11:48:02,490 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 651 transitions. [2023-11-26 11:48:02,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 651 transitions. [2023-11-26 11:48:02,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:48:02,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 651 transitions. [2023-11-26 11:48:02,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 24.11111111111111) internal successors, (651), 27 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:02,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 46.0) internal successors, (1288), 28 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:02,499 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 46.0) internal successors, (1288), 28 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:02,499 INFO L175 Difference]: Start difference. First operand has 211 places, 157 transitions, 1660 flow. Second operand 27 states and 651 transitions. [2023-11-26 11:48:02,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 898 transitions, 10695 flow [2023-11-26 11:48:02,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 898 transitions, 10527 flow, removed 18 selfloop flow, removed 22 redundant places. [2023-11-26 11:48:02,800 INFO L231 Difference]: Finished difference. Result has 214 places, 154 transitions, 1570 flow [2023-11-26 11:48:02,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1570, PETRI_PLACES=214, PETRI_TRANSITIONS=154} [2023-11-26 11:48:02,802 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 168 predicate places. [2023-11-26 11:48:02,802 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 154 transitions, 1570 flow [2023-11-26 11:48:02,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.32) internal successors, (458), 25 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:48:02,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:02,803 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-11-26 11:48:02,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:03,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 11:48:03,010 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:48:03,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:03,011 INFO L85 PathProgramCache]: Analyzing trace with hash 567794067, now seen corresponding path program 3 times [2023-11-26 11:48:03,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:03,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904694879] [2023-11-26 11:48:03,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:03,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 291 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-26 11:48:03,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:03,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904694879] [2023-11-26 11:48:03,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904694879] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:48:03,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168419598] [2023-11-26 11:48:03,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:48:03,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:03,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:48:03,420 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:48:03,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4664364c-dd7b-4a0f-92cd-6d535ad02b6c/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:48:03,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 11:48:03,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:48:03,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 11:48:03,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:48:03,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:48:03,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9