./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr-oob.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr-oob.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX --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 5daf9d459a591738ce4ac52eada4b738511fbb9d800cd03182e33bae5ebd943b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 18:41:30,812 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 18:41:30,942 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 18:41:30,947 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 18:41:30,948 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 18:41:30,999 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 18:41:31,002 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 18:41:31,002 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 18:41:31,003 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 18:41:31,004 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 18:41:31,004 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 18:41:31,005 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 18:41:31,006 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 18:41:31,007 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 18:41:31,010 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 18:41:31,011 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 18:41:31,011 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 18:41:31,012 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 18:41:31,012 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 18:41:31,012 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 18:41:31,013 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 18:41:31,013 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 18:41:31,014 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 18:41:31,014 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 18:41:31,014 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 18:41:31,015 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 18:41:31,015 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 18:41:31,015 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 18:41:31,016 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 18:41:31,016 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 18:41:31,020 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 18:41:31,021 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 18:41:31,028 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 18:41:31,028 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:41:31,029 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 18:41:31,029 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 18:41:31,030 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 18:41:31,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 18:41:31,030 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 18:41:31,030 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 18:41:31,031 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 18:41:31,033 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 18:41:31,033 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_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5daf9d459a591738ce4ac52eada4b738511fbb9d800cd03182e33bae5ebd943b [2024-11-08 18:41:31,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 18:41:31,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 18:41:31,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 18:41:31,405 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 18:41:31,405 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 18:41:31,407 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr-oob.c Unable to find full path for "g++" [2024-11-08 18:41:33,566 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 18:41:33,798 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 18:41:33,799 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr-oob.c [2024-11-08 18:41:33,809 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/data/8d7fe363a/51e88d1429cb48fe893b4f37c494f33a/FLAGcf1c05244 [2024-11-08 18:41:34,144 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/data/8d7fe363a/51e88d1429cb48fe893b4f37c494f33a [2024-11-08 18:41:34,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 18:41:34,150 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 18:41:34,153 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 18:41:34,153 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 18:41:34,161 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 18:41:34,162 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:41:34" (1/1) ... [2024-11-08 18:41:34,163 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6896305f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:41:34, skipping insertion in model container [2024-11-08 18:41:34,164 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:41:34" (1/1) ... [2024-11-08 18:41:34,205 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 18:41:34,541 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 18:41:34,555 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 18:41:34,559 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 18:41:34,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:41:34,575 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 18:41:34,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:41:34,657 INFO L204 MainTranslator]: Completed translation [2024-11-08 18:41:34,658 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:41:34 WrapperNode [2024-11-08 18:41:34,658 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 18:41:34,660 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 18:41:34,660 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 18:41:34,661 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 18:41:34,669 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:41:34" (1/1) ... [2024-11-08 18:41:34,681 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:41:34" (1/1) ... [2024-11-08 18:41:34,725 INFO L138 Inliner]: procedures = 27, calls = 66, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 390 [2024-11-08 18:41:34,726 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 18:41:34,727 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 18:41:34,727 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 18:41:34,727 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 18:41:34,742 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:41:34" (1/1) ... [2024-11-08 18:41:34,743 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:41:34" (1/1) ... [2024-11-08 18:41:34,756 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:41:34" (1/1) ... [2024-11-08 18:41:34,794 INFO L175 MemorySlicer]: Split 24 memory accesses to 4 slices as follows [2, 16, 3, 3]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 6 writes are split as follows [0, 4, 1, 1]. [2024-11-08 18:41:34,794 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:41:34" (1/1) ... [2024-11-08 18:41:34,795 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:41:34" (1/1) ... [2024-11-08 18:41:34,810 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:41:34" (1/1) ... [2024-11-08 18:41:34,820 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:41:34" (1/1) ... [2024-11-08 18:41:34,823 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:41:34" (1/1) ... [2024-11-08 18:41:34,826 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:41:34" (1/1) ... [2024-11-08 18:41:34,831 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 18:41:34,832 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 18:41:34,833 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 18:41:34,833 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 18:41:34,834 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:41:34" (1/1) ... [2024-11-08 18:41:34,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:41:34,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:41:34,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 18:41:34,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 18:41:34,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 18:41:34,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-08 18:41:34,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-08 18:41:34,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-08 18:41:34,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-08 18:41:34,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 18:41:34,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 18:41:34,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 18:41:34,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 18:41:34,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 18:41:34,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 18:41:34,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 18:41:34,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 18:41:34,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-08 18:41:34,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-08 18:41:34,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-08 18:41:34,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-08 18:41:34,943 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 18:41:34,943 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 18:41:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 18:41:34,944 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 18:41:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 18:41:34,944 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 18:41:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 18:41:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 18:41:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 18:41:34,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 18:41:34,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 18:41:34,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 18:41:34,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 18:41:34,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 18:41:34,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 18:41:34,950 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 18:41:35,183 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 18:41:35,186 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 18:41:36,206 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 18:41:36,207 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 18:41:36,872 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 18:41:36,873 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 18:41:36,873 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:41:36 BoogieIcfgContainer [2024-11-08 18:41:36,874 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 18:41:36,878 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 18:41:36,879 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 18:41:36,883 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 18:41:36,884 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 06:41:34" (1/3) ... [2024-11-08 18:41:36,885 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7984932b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:41:36, skipping insertion in model container [2024-11-08 18:41:36,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:41:34" (2/3) ... [2024-11-08 18:41:36,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7984932b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:41:36, skipping insertion in model container [2024-11-08 18:41:36,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:41:36" (3/3) ... [2024-11-08 18:41:36,889 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons-eq.wvr-oob.c [2024-11-08 18:41:36,914 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 18:41:36,914 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2024-11-08 18:41:36,915 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 18:41:37,099 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-08 18:41:37,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 133 transitions, 287 flow [2024-11-08 18:41:37,294 INFO L124 PetriNetUnfolderBase]: 19/130 cut-off events. [2024-11-08 18:41:37,294 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-08 18:41:37,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 130 events. 19/130 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 370 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2024-11-08 18:41:37,306 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 133 transitions, 287 flow [2024-11-08 18:41:37,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 129 transitions, 276 flow [2024-11-08 18:41:37,333 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 18:41:37,344 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@1727deb7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 18:41:37,344 INFO L334 AbstractCegarLoop]: Starting to check reachability of 81 error locations. [2024-11-08 18:41:37,354 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 18:41:37,354 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 18:41:37,354 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 18:41:37,355 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:41:37,356 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:41:37,356 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:41:37,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:41:37,365 INFO L85 PathProgramCache]: Analyzing trace with hash 39579638, now seen corresponding path program 1 times [2024-11-08 18:41:37,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:41:37,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904815341] [2024-11-08 18:41:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:41:37,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:41:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:41:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:41:37,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:41:37,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904815341] [2024-11-08 18:41:37,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904815341] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:41:37,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:41:37,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 18:41:37,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463522831] [2024-11-08 18:41:37,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:41:37,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:41:37,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:41:37,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:41:37,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:41:37,971 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 133 [2024-11-08 18:41:37,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 129 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:41:37,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:41:37,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 133 [2024-11-08 18:41:37,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:41:40,807 INFO L124 PetriNetUnfolderBase]: 6061/12614 cut-off events. [2024-11-08 18:41:40,808 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-11-08 18:41:40,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20693 conditions, 12614 events. 6061/12614 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 128549 event pairs, 4141 based on Foata normal form. 1/6943 useless extension candidates. Maximal degree in co-relation 19957. Up to 7739 conditions per place. [2024-11-08 18:41:40,976 INFO L140 encePairwiseOnDemand]: 120/133 looper letters, 52 selfloop transitions, 4 changer transitions 0/119 dead transitions. [2024-11-08 18:41:40,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 119 transitions, 368 flow [2024-11-08 18:41:40,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:41:40,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:41:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2024-11-08 18:41:40,994 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-08 18:41:40,996 INFO L175 Difference]: Start difference. First operand has 120 places, 129 transitions, 276 flow. Second operand 3 states and 266 transitions. [2024-11-08 18:41:40,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 119 transitions, 368 flow [2024-11-08 18:41:41,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 119 transitions, 356 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 18:41:41,029 INFO L231 Difference]: Finished difference. Result has 106 places, 119 transitions, 252 flow [2024-11-08 18:41:41,032 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=106, PETRI_TRANSITIONS=119} [2024-11-08 18:41:41,037 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, -14 predicate places. [2024-11-08 18:41:41,037 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 119 transitions, 252 flow [2024-11-08 18:41:41,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:41:41,038 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:41:41,038 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:41:41,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 18:41:41,039 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:41:41,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:41:41,040 INFO L85 PathProgramCache]: Analyzing trace with hash 39579639, now seen corresponding path program 1 times [2024-11-08 18:41:41,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:41:41,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000673230] [2024-11-08 18:41:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:41:41,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:41:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:41:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:41:41,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:41:41,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000673230] [2024-11-08 18:41:41,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000673230] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:41:41,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:41:41,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:41:41,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468642464] [2024-11-08 18:41:41,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:41:41,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:41:41,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:41:41,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:41:41,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:41:41,894 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 133 [2024-11-08 18:41:41,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 119 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:41:41,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:41:41,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 133 [2024-11-08 18:41:41,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:41:44,237 INFO L124 PetriNetUnfolderBase]: 6063/12621 cut-off events. [2024-11-08 18:41:44,237 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-11-08 18:41:44,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20522 conditions, 12621 events. 6063/12621 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 128586 event pairs, 4141 based on Foata normal form. 0/6939 useless extension candidates. Maximal degree in co-relation 20437. Up to 7769 conditions per place. [2024-11-08 18:41:44,441 INFO L140 encePairwiseOnDemand]: 128/133 looper letters, 74 selfloop transitions, 5 changer transitions 0/126 dead transitions. [2024-11-08 18:41:44,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 126 transitions, 424 flow [2024-11-08 18:41:44,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:41:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:41:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 300 transitions. [2024-11-08 18:41:44,446 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5639097744360902 [2024-11-08 18:41:44,446 INFO L175 Difference]: Start difference. First operand has 106 places, 119 transitions, 252 flow. Second operand 4 states and 300 transitions. [2024-11-08 18:41:44,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 126 transitions, 424 flow [2024-11-08 18:41:44,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 126 transitions, 416 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:41:44,457 INFO L231 Difference]: Finished difference. Result has 109 places, 123 transitions, 276 flow [2024-11-08 18:41:44,458 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=276, PETRI_PLACES=109, PETRI_TRANSITIONS=123} [2024-11-08 18:41:44,459 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, -11 predicate places. [2024-11-08 18:41:44,460 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 123 transitions, 276 flow [2024-11-08 18:41:44,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:41:44,461 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:41:44,462 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 18:41:44,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 18:41:44,462 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:41:44,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:41:44,463 INFO L85 PathProgramCache]: Analyzing trace with hash -622812228, now seen corresponding path program 1 times [2024-11-08 18:41:44,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:41:44,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683129120] [2024-11-08 18:41:44,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:41:44,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:41:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:41:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:41:44,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:41:44,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683129120] [2024-11-08 18:41:44,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683129120] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:41:44,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:41:44,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:41:44,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877859793] [2024-11-08 18:41:44,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:41:44,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 18:41:44,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:41:44,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 18:41:44,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 18:41:45,404 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 133 [2024-11-08 18:41:45,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 123 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:41:45,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:41:45,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 133 [2024-11-08 18:41:45,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:41:47,752 INFO L124 PetriNetUnfolderBase]: 6063/12624 cut-off events. [2024-11-08 18:41:47,753 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-08 18:41:47,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20537 conditions, 12624 events. 6063/12624 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 128780 event pairs, 4141 based on Foata normal form. 0/6944 useless extension candidates. Maximal degree in co-relation 20504. Up to 7767 conditions per place. [2024-11-08 18:41:47,865 INFO L140 encePairwiseOnDemand]: 123/133 looper letters, 75 selfloop transitions, 7 changer transitions 0/129 dead transitions. [2024-11-08 18:41:47,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 129 transitions, 449 flow [2024-11-08 18:41:47,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:41:47,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:41:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 360 transitions. [2024-11-08 18:41:47,869 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5413533834586466 [2024-11-08 18:41:47,869 INFO L175 Difference]: Start difference. First operand has 109 places, 123 transitions, 276 flow. Second operand 5 states and 360 transitions. [2024-11-08 18:41:47,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 129 transitions, 449 flow [2024-11-08 18:41:47,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 129 transitions, 449 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 18:41:47,874 INFO L231 Difference]: Finished difference. Result has 115 places, 125 transitions, 312 flow [2024-11-08 18:41:47,874 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=115, PETRI_TRANSITIONS=125} [2024-11-08 18:41:47,875 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, -5 predicate places. [2024-11-08 18:41:47,876 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 125 transitions, 312 flow [2024-11-08 18:41:47,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.0) internal successors, (336), 6 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:41:47,876 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:41:47,877 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 18:41:47,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 18:41:47,877 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:41:47,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:41:47,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1997682747, now seen corresponding path program 1 times [2024-11-08 18:41:47,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:41:47,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990322087] [2024-11-08 18:41:47,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:41:47,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:41:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:41:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:41:48,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:41:48,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990322087] [2024-11-08 18:41:48,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990322087] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:41:48,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411911896] [2024-11-08 18:41:48,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:41:48,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:41:48,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:41:48,287 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:41:48,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 18:41:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:41:48,435 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 18:41:48,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:41:48,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 18:41:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:41:48,942 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:41:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:41:49,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411911896] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:41:49,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:41:49,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-08 18:41:49,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697196778] [2024-11-08 18:41:49,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:41:49,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 18:41:49,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:41:49,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 18:41:49,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-08 18:41:50,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 133 [2024-11-08 18:41:50,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 125 transitions, 312 flow. Second operand has 12 states, 12 states have (on average 56.75) internal successors, (681), 12 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:41:50,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:41:50,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 133 [2024-11-08 18:41:50,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:41:52,551 INFO L124 PetriNetUnfolderBase]: 6064/12629 cut-off events. [2024-11-08 18:41:52,551 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-11-08 18:41:52,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20573 conditions, 12629 events. 6064/12629 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 128855 event pairs, 4141 based on Foata normal form. 1/6955 useless extension candidates. Maximal degree in co-relation 20516. Up to 7761 conditions per place. [2024-11-08 18:41:52,687 INFO L140 encePairwiseOnDemand]: 118/133 looper letters, 64 selfloop transitions, 21 changer transitions 0/132 dead transitions. [2024-11-08 18:41:52,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 132 transitions, 508 flow [2024-11-08 18:41:52,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 18:41:52,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 18:41:52,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 580 transitions. [2024-11-08 18:41:52,691 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48454469507101083 [2024-11-08 18:41:52,691 INFO L175 Difference]: Start difference. First operand has 115 places, 125 transitions, 312 flow. Second operand 9 states and 580 transitions. [2024-11-08 18:41:52,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 132 transitions, 508 flow [2024-11-08 18:41:52,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 132 transitions, 498 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-08 18:41:52,699 INFO L231 Difference]: Finished difference. Result has 121 places, 128 transitions, 366 flow [2024-11-08 18:41:52,699 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=366, PETRI_PLACES=121, PETRI_TRANSITIONS=128} [2024-11-08 18:41:52,702 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, 1 predicate places. [2024-11-08 18:41:52,703 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 128 transitions, 366 flow [2024-11-08 18:41:52,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 56.75) internal successors, (681), 12 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:41:52,705 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:41:52,705 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:41:52,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 18:41:52,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:41:52,910 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:41:52,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:41:52,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1519623195, now seen corresponding path program 1 times [2024-11-08 18:41:52,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:41:52,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835068080] [2024-11-08 18:41:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:41:52,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:41:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:41:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:41:53,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:41:53,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835068080] [2024-11-08 18:41:53,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835068080] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:41:53,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:41:53,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:41:53,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327452809] [2024-11-08 18:41:53,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:41:53,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 18:41:53,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:41:53,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 18:41:53,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 18:41:53,547 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 133 [2024-11-08 18:41:53,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 128 transitions, 366 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:41:53,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:41:53,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 133 [2024-11-08 18:41:53,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:41:55,618 INFO L124 PetriNetUnfolderBase]: 6065/12634 cut-off events. [2024-11-08 18:41:55,619 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-08 18:41:55,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20604 conditions, 12634 events. 6065/12634 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 128637 event pairs, 4141 based on Foata normal form. 1/6964 useless extension candidates. Maximal degree in co-relation 20561. Up to 7777 conditions per place. [2024-11-08 18:41:55,748 INFO L140 encePairwiseOnDemand]: 123/133 looper letters, 79 selfloop transitions, 9 changer transitions 0/135 dead transitions. [2024-11-08 18:41:55,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 135 transitions, 560 flow [2024-11-08 18:41:55,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:41:55,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:41:55,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 358 transitions. [2024-11-08 18:41:55,750 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5383458646616541 [2024-11-08 18:41:55,750 INFO L175 Difference]: Start difference. First operand has 121 places, 128 transitions, 366 flow. Second operand 5 states and 358 transitions. [2024-11-08 18:41:55,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 135 transitions, 560 flow [2024-11-08 18:41:55,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 135 transitions, 507 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-08 18:41:55,755 INFO L231 Difference]: Finished difference. Result has 120 places, 131 transitions, 362 flow [2024-11-08 18:41:55,756 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=120, PETRI_TRANSITIONS=131} [2024-11-08 18:41:55,757 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, 0 predicate places. [2024-11-08 18:41:55,757 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 131 transitions, 362 flow [2024-11-08 18:41:55,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:41:55,758 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:41:55,758 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-08 18:41:55,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 18:41:55,759 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:41:55,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:41:55,759 INFO L85 PathProgramCache]: Analyzing trace with hash 60933028, now seen corresponding path program 1 times [2024-11-08 18:41:55,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:41:55,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353587033] [2024-11-08 18:41:55,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:41:55,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:41:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:41:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:41:56,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:41:56,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353587033] [2024-11-08 18:41:56,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353587033] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:41:56,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146231740] [2024-11-08 18:41:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:41:56,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:41:56,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:41:56,184 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:41:56,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 18:41:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:41:56,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 18:41:56,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:41:56,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 18:41:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:41:56,743 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:41:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:41:57,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146231740] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:41:57,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:41:57,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-08 18:41:57,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784477592] [2024-11-08 18:41:57,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:41:57,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 18:41:57,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:41:57,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 18:41:57,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-08 18:41:58,364 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 133 [2024-11-08 18:41:58,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 131 transitions, 362 flow. Second operand has 14 states, 14 states have (on average 56.785714285714285) internal successors, (795), 14 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:41:58,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:41:58,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 133 [2024-11-08 18:41:58,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:42:00,726 INFO L124 PetriNetUnfolderBase]: 6063/12630 cut-off events. [2024-11-08 18:42:00,727 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-11-08 18:42:00,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20582 conditions, 12630 events. 6063/12630 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 128710 event pairs, 4141 based on Foata normal form. 2/6960 useless extension candidates. Maximal degree in co-relation 20552. Up to 7753 conditions per place. [2024-11-08 18:42:00,826 INFO L140 encePairwiseOnDemand]: 117/133 looper letters, 62 selfloop transitions, 22 changer transitions 0/131 dead transitions. [2024-11-08 18:42:00,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 131 transitions, 519 flow [2024-11-08 18:42:00,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 18:42:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 18:42:00,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 521 transitions. [2024-11-08 18:42:00,830 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48966165413533835 [2024-11-08 18:42:00,830 INFO L175 Difference]: Start difference. First operand has 120 places, 131 transitions, 362 flow. Second operand 8 states and 521 transitions. [2024-11-08 18:42:00,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 131 transitions, 519 flow [2024-11-08 18:42:00,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 131 transitions, 510 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:42:00,835 INFO L231 Difference]: Finished difference. Result has 123 places, 127 transitions, 378 flow [2024-11-08 18:42:00,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=378, PETRI_PLACES=123, PETRI_TRANSITIONS=127} [2024-11-08 18:42:00,836 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, 3 predicate places. [2024-11-08 18:42:00,837 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 127 transitions, 378 flow [2024-11-08 18:42:00,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 56.785714285714285) internal successors, (795), 14 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:00,838 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:42:00,838 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:42:00,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 18:42:01,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-08 18:42:01,043 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:42:01,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:42:01,044 INFO L85 PathProgramCache]: Analyzing trace with hash -68022413, now seen corresponding path program 1 times [2024-11-08 18:42:01,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:42:01,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394760181] [2024-11-08 18:42:01,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:42:01,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:42:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:42:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:01,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:42:01,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394760181] [2024-11-08 18:42:01,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394760181] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:42:01,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:42:01,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:42:01,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100576375] [2024-11-08 18:42:01,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:42:01,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:42:01,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:42:01,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:42:01,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:42:01,167 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 133 [2024-11-08 18:42:01,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 127 transitions, 378 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:01,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:42:01,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 133 [2024-11-08 18:42:01,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:42:02,486 INFO L124 PetriNetUnfolderBase]: 6063/12629 cut-off events. [2024-11-08 18:42:02,486 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2024-11-08 18:42:02,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20578 conditions, 12629 events. 6063/12629 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 128806 event pairs, 4141 based on Foata normal form. 0/6962 useless extension candidates. Maximal degree in co-relation 20503. Up to 7759 conditions per place. [2024-11-08 18:42:02,593 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 61 selfloop transitions, 3 changer transitions 0/126 dead transitions. [2024-11-08 18:42:02,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 126 transitions, 504 flow [2024-11-08 18:42:02,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:42:02,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:42:02,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2024-11-08 18:42:02,595 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6691729323308271 [2024-11-08 18:42:02,595 INFO L175 Difference]: Start difference. First operand has 123 places, 127 transitions, 378 flow. Second operand 3 states and 267 transitions. [2024-11-08 18:42:02,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 126 transitions, 504 flow [2024-11-08 18:42:02,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 126 transitions, 461 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-08 18:42:02,599 INFO L231 Difference]: Finished difference. Result has 117 places, 126 transitions, 339 flow [2024-11-08 18:42:02,600 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=117, PETRI_TRANSITIONS=126} [2024-11-08 18:42:02,600 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, -3 predicate places. [2024-11-08 18:42:02,601 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 126 transitions, 339 flow [2024-11-08 18:42:02,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:02,601 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:42:02,601 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:42:02,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 18:42:02,602 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:42:02,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:42:02,602 INFO L85 PathProgramCache]: Analyzing trace with hash -68022412, now seen corresponding path program 1 times [2024-11-08 18:42:02,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:42:02,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306626831] [2024-11-08 18:42:02,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:42:02,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:42:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:42:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:02,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:42:02,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306626831] [2024-11-08 18:42:02,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306626831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:42:02,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:42:02,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 18:42:02,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980494312] [2024-11-08 18:42:02,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:42:02,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:42:02,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:42:02,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:42:02,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:42:02,874 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 133 [2024-11-08 18:42:02,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 126 transitions, 339 flow. Second operand has 5 states, 5 states have (on average 63.8) internal successors, (319), 5 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:02,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:42:02,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 133 [2024-11-08 18:42:02,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:42:04,668 INFO L124 PetriNetUnfolderBase]: 7896/17135 cut-off events. [2024-11-08 18:42:04,669 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2024-11-08 18:42:04,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27758 conditions, 17135 events. 7896/17135 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 1313. Compared 187506 event pairs, 5752 based on Foata normal form. 237/9579 useless extension candidates. Maximal degree in co-relation 27661. Up to 7768 conditions per place. [2024-11-08 18:42:04,770 INFO L140 encePairwiseOnDemand]: 121/133 looper letters, 113 selfloop transitions, 12 changer transitions 0/180 dead transitions. [2024-11-08 18:42:04,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 180 transitions, 719 flow [2024-11-08 18:42:04,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:42:04,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:42:04,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 494 transitions. [2024-11-08 18:42:04,773 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-08 18:42:04,774 INFO L175 Difference]: Start difference. First operand has 117 places, 126 transitions, 339 flow. Second operand 6 states and 494 transitions. [2024-11-08 18:42:04,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 180 transitions, 719 flow [2024-11-08 18:42:04,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 180 transitions, 707 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:42:04,780 INFO L231 Difference]: Finished difference. Result has 124 places, 134 transitions, 421 flow [2024-11-08 18:42:04,781 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=421, PETRI_PLACES=124, PETRI_TRANSITIONS=134} [2024-11-08 18:42:04,781 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, 4 predicate places. [2024-11-08 18:42:04,782 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 134 transitions, 421 flow [2024-11-08 18:42:04,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.8) internal successors, (319), 5 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:04,782 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:42:04,783 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:42:04,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 18:42:04,783 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:42:04,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:42:04,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2138016432, now seen corresponding path program 1 times [2024-11-08 18:42:04,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:42:04,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179646773] [2024-11-08 18:42:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:42:04,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:42:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:42:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:05,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:42:05,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179646773] [2024-11-08 18:42:05,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179646773] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:42:05,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186110951] [2024-11-08 18:42:05,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:42:05,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:42:05,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:42:05,288 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:42:05,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 18:42:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:42:05,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 18:42:05,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:42:05,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 18:42:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:05,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:42:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:06,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186110951] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:42:06,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:42:06,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-08 18:42:06,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123068283] [2024-11-08 18:42:06,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:42:06,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 18:42:06,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:42:06,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 18:42:06,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-08 18:42:07,036 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 133 [2024-11-08 18:42:07,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 134 transitions, 421 flow. Second operand has 14 states, 14 states have (on average 57.07142857142857) internal successors, (799), 14 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:07,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:42:07,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 133 [2024-11-08 18:42:07,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:42:09,063 INFO L124 PetriNetUnfolderBase]: 8275/16730 cut-off events. [2024-11-08 18:42:09,064 INFO L125 PetriNetUnfolderBase]: For 485/539 co-relation queries the response was YES. [2024-11-08 18:42:09,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28197 conditions, 16730 events. 8275/16730 cut-off events. For 485/539 co-relation queries the response was YES. Maximal size of possible extension queue 1235. Compared 172916 event pairs, 5949 based on Foata normal form. 2/9134 useless extension candidates. Maximal degree in co-relation 28049. Up to 10747 conditions per place. [2024-11-08 18:42:09,156 INFO L140 encePairwiseOnDemand]: 119/133 looper letters, 68 selfloop transitions, 33 changer transitions 0/147 dead transitions. [2024-11-08 18:42:09,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 147 transitions, 671 flow [2024-11-08 18:42:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 18:42:09,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 18:42:09,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 641 transitions. [2024-11-08 18:42:09,159 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48195488721804514 [2024-11-08 18:42:09,159 INFO L175 Difference]: Start difference. First operand has 124 places, 134 transitions, 421 flow. Second operand 10 states and 641 transitions. [2024-11-08 18:42:09,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 147 transitions, 671 flow [2024-11-08 18:42:09,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 147 transitions, 667 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:42:09,165 INFO L231 Difference]: Finished difference. Result has 132 places, 139 transitions, 521 flow [2024-11-08 18:42:09,166 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=521, PETRI_PLACES=132, PETRI_TRANSITIONS=139} [2024-11-08 18:42:09,167 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, 12 predicate places. [2024-11-08 18:42:09,167 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 139 transitions, 521 flow [2024-11-08 18:42:09,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 57.07142857142857) internal successors, (799), 14 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:09,168 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:42:09,168 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:42:09,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 18:42:09,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:42:09,369 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:42:09,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:42:09,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1647248548, now seen corresponding path program 1 times [2024-11-08 18:42:09,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:42:09,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036297345] [2024-11-08 18:42:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:42:09,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:42:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:42:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:09,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:42:09,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036297345] [2024-11-08 18:42:09,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036297345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:42:09,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029670651] [2024-11-08 18:42:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:42:09,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:42:09,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:42:09,661 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:42:09,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 18:42:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:42:09,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 18:42:09,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:42:09,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:42:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:09,965 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:42:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:10,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029670651] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 18:42:10,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 18:42:10,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 15 [2024-11-08 18:42:10,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406112109] [2024-11-08 18:42:10,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:42:10,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 18:42:10,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:42:10,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 18:42:10,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-11-08 18:42:10,220 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2024-11-08 18:42:10,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 139 transitions, 521 flow. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:10,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:42:10,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2024-11-08 18:42:10,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:42:12,257 INFO L124 PetriNetUnfolderBase]: 7900/17151 cut-off events. [2024-11-08 18:42:12,258 INFO L125 PetriNetUnfolderBase]: For 526/526 co-relation queries the response was YES. [2024-11-08 18:42:12,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28274 conditions, 17151 events. 7900/17151 cut-off events. For 526/526 co-relation queries the response was YES. Maximal size of possible extension queue 1214. Compared 185897 event pairs, 5752 based on Foata normal form. 0/9360 useless extension candidates. Maximal degree in co-relation 28156. Up to 7767 conditions per place. [2024-11-08 18:42:12,366 INFO L140 encePairwiseOnDemand]: 120/133 looper letters, 121 selfloop transitions, 20 changer transitions 0/187 dead transitions. [2024-11-08 18:42:12,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 187 transitions, 945 flow [2024-11-08 18:42:12,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:42:12,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:42:12,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 467 transitions. [2024-11-08 18:42:12,369 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5852130325814536 [2024-11-08 18:42:12,369 INFO L175 Difference]: Start difference. First operand has 132 places, 139 transitions, 521 flow. Second operand 6 states and 467 transitions. [2024-11-08 18:42:12,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 187 transitions, 945 flow [2024-11-08 18:42:12,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 187 transitions, 865 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-08 18:42:12,378 INFO L231 Difference]: Finished difference. Result has 134 places, 146 transitions, 566 flow [2024-11-08 18:42:12,378 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=566, PETRI_PLACES=134, PETRI_TRANSITIONS=146} [2024-11-08 18:42:12,379 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, 14 predicate places. [2024-11-08 18:42:12,379 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 146 transitions, 566 flow [2024-11-08 18:42:12,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:12,380 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:42:12,380 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:42:12,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 18:42:12,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 18:42:12,585 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:42:12,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:42:12,586 INFO L85 PathProgramCache]: Analyzing trace with hash 129685710, now seen corresponding path program 1 times [2024-11-08 18:42:12,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:42:12,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311754565] [2024-11-08 18:42:12,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:42:12,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:42:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:42:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:12,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:42:12,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311754565] [2024-11-08 18:42:12,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311754565] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:42:12,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:42:12,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:42:12,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721497439] [2024-11-08 18:42:12,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:42:12,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 18:42:12,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:42:12,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 18:42:12,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 18:42:13,195 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 133 [2024-11-08 18:42:13,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 146 transitions, 566 flow. Second operand has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:13,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:42:13,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 133 [2024-11-08 18:42:13,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:42:15,097 INFO L124 PetriNetUnfolderBase]: 8218/16754 cut-off events. [2024-11-08 18:42:15,097 INFO L125 PetriNetUnfolderBase]: For 536/536 co-relation queries the response was YES. [2024-11-08 18:42:15,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28244 conditions, 16754 events. 8218/16754 cut-off events. For 536/536 co-relation queries the response was YES. Maximal size of possible extension queue 1315. Compared 175057 event pairs, 5906 based on Foata normal form. 2/9086 useless extension candidates. Maximal degree in co-relation 28125. Up to 10731 conditions per place. [2024-11-08 18:42:15,217 INFO L140 encePairwiseOnDemand]: 124/133 looper letters, 99 selfloop transitions, 13 changer transitions 0/158 dead transitions. [2024-11-08 18:42:15,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 158 transitions, 848 flow [2024-11-08 18:42:15,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:42:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:42:15,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 355 transitions. [2024-11-08 18:42:15,219 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5338345864661654 [2024-11-08 18:42:15,219 INFO L175 Difference]: Start difference. First operand has 134 places, 146 transitions, 566 flow. Second operand 5 states and 355 transitions. [2024-11-08 18:42:15,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 158 transitions, 848 flow [2024-11-08 18:42:15,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 158 transitions, 847 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:42:15,227 INFO L231 Difference]: Finished difference. Result has 139 places, 151 transitions, 642 flow [2024-11-08 18:42:15,228 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=642, PETRI_PLACES=139, PETRI_TRANSITIONS=151} [2024-11-08 18:42:15,228 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, 19 predicate places. [2024-11-08 18:42:15,229 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 151 transitions, 642 flow [2024-11-08 18:42:15,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:15,229 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:42:15,229 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:42:15,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 18:42:15,230 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:42:15,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:42:15,230 INFO L85 PathProgramCache]: Analyzing trace with hash 129685701, now seen corresponding path program 1 times [2024-11-08 18:42:15,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:42:15,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662101975] [2024-11-08 18:42:15,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:42:15,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:42:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:42:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:15,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:42:15,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662101975] [2024-11-08 18:42:15,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662101975] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:42:15,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:42:15,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:42:15,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986942196] [2024-11-08 18:42:15,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:42:15,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:42:15,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:42:15,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:42:15,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:42:15,396 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 133 [2024-11-08 18:42:15,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 151 transitions, 642 flow. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:15,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:42:15,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 133 [2024-11-08 18:42:15,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:42:17,017 INFO L124 PetriNetUnfolderBase]: 8085/16035 cut-off events. [2024-11-08 18:42:17,017 INFO L125 PetriNetUnfolderBase]: For 618/618 co-relation queries the response was YES. [2024-11-08 18:42:17,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27411 conditions, 16035 events. 8085/16035 cut-off events. For 618/618 co-relation queries the response was YES. Maximal size of possible extension queue 1267. Compared 162447 event pairs, 5942 based on Foata normal form. 0/9156 useless extension candidates. Maximal degree in co-relation 27301. Up to 10602 conditions per place. [2024-11-08 18:42:17,152 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 80 selfloop transitions, 3 changer transitions 0/148 dead transitions. [2024-11-08 18:42:17,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 148 transitions, 802 flow [2024-11-08 18:42:17,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:42:17,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:42:17,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2024-11-08 18:42:17,154 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6591478696741855 [2024-11-08 18:42:17,154 INFO L175 Difference]: Start difference. First operand has 139 places, 151 transitions, 642 flow. Second operand 3 states and 263 transitions. [2024-11-08 18:42:17,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 148 transitions, 802 flow [2024-11-08 18:42:17,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 148 transitions, 801 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:42:17,159 INFO L231 Difference]: Finished difference. Result has 137 places, 148 transitions, 641 flow [2024-11-08 18:42:17,160 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=641, PETRI_PLACES=137, PETRI_TRANSITIONS=148} [2024-11-08 18:42:17,160 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, 17 predicate places. [2024-11-08 18:42:17,161 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 148 transitions, 641 flow [2024-11-08 18:42:17,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:17,161 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:42:17,161 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:42:17,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-08 18:42:17,162 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:42:17,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:42:17,162 INFO L85 PathProgramCache]: Analyzing trace with hash 129685702, now seen corresponding path program 1 times [2024-11-08 18:42:17,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:42:17,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46573369] [2024-11-08 18:42:17,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:42:17,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:42:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:42:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:17,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:42:17,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46573369] [2024-11-08 18:42:17,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46573369] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:42:17,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:42:17,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 18:42:17,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144095058] [2024-11-08 18:42:17,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:42:17,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 18:42:17,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:42:17,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 18:42:17,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-08 18:42:17,769 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 133 [2024-11-08 18:42:17,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 148 transitions, 641 flow. Second operand has 7 states, 7 states have (on average 61.285714285714285) internal successors, (429), 7 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:17,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:42:17,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 133 [2024-11-08 18:42:17,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:42:19,562 INFO L124 PetriNetUnfolderBase]: 8097/16077 cut-off events. [2024-11-08 18:42:19,562 INFO L125 PetriNetUnfolderBase]: For 670/670 co-relation queries the response was YES. [2024-11-08 18:42:19,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27554 conditions, 16077 events. 8097/16077 cut-off events. For 670/670 co-relation queries the response was YES. Maximal size of possible extension queue 1267. Compared 162805 event pairs, 5942 based on Foata normal form. 0/9194 useless extension candidates. Maximal degree in co-relation 27444. Up to 10653 conditions per place. [2024-11-08 18:42:19,687 INFO L140 encePairwiseOnDemand]: 125/133 looper letters, 89 selfloop transitions, 16 changer transitions 0/166 dead transitions. [2024-11-08 18:42:19,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 166 transitions, 963 flow [2024-11-08 18:42:19,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:42:19,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:42:19,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 431 transitions. [2024-11-08 18:42:19,689 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5401002506265664 [2024-11-08 18:42:19,690 INFO L175 Difference]: Start difference. First operand has 137 places, 148 transitions, 641 flow. Second operand 6 states and 431 transitions. [2024-11-08 18:42:19,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 166 transitions, 963 flow [2024-11-08 18:42:19,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 166 transitions, 960 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:42:19,698 INFO L231 Difference]: Finished difference. Result has 144 places, 160 transitions, 802 flow [2024-11-08 18:42:19,699 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=802, PETRI_PLACES=144, PETRI_TRANSITIONS=160} [2024-11-08 18:42:19,699 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, 24 predicate places. [2024-11-08 18:42:19,700 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 160 transitions, 802 flow [2024-11-08 18:42:19,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 61.285714285714285) internal successors, (429), 7 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:19,700 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:42:19,700 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:42:19,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-08 18:42:19,701 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:42:19,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:42:19,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1116205254, now seen corresponding path program 1 times [2024-11-08 18:42:19,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:42:19,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933915272] [2024-11-08 18:42:19,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:42:19,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:42:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:42:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:19,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:42:19,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933915272] [2024-11-08 18:42:19,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933915272] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:42:19,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750485750] [2024-11-08 18:42:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:42:19,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:42:19,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:42:19,863 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:42:19,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 18:42:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:42:19,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 18:42:19,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:42:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:20,083 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:42:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:20,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750485750] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:42:20,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:42:20,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-08 18:42:20,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940920634] [2024-11-08 18:42:20,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:42:20,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 18:42:20,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:42:20,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 18:42:20,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-08 18:42:20,278 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 133 [2024-11-08 18:42:20,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 160 transitions, 802 flow. Second operand has 14 states, 14 states have (on average 58.42857142857143) internal successors, (818), 14 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:20,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:42:20,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 133 [2024-11-08 18:42:20,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:42:23,219 INFO L124 PetriNetUnfolderBase]: 12672/25697 cut-off events. [2024-11-08 18:42:23,220 INFO L125 PetriNetUnfolderBase]: For 1152/1152 co-relation queries the response was YES. [2024-11-08 18:42:23,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43619 conditions, 25697 events. 12672/25697 cut-off events. For 1152/1152 co-relation queries the response was YES. Maximal size of possible extension queue 1834. Compared 278811 event pairs, 8880 based on Foata normal form. 1/14504 useless extension candidates. Maximal degree in co-relation 43461. Up to 9497 conditions per place. [2024-11-08 18:42:23,444 INFO L140 encePairwiseOnDemand]: 112/133 looper letters, 134 selfloop transitions, 74 changer transitions 0/251 dead transitions. [2024-11-08 18:42:23,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 251 transitions, 1646 flow [2024-11-08 18:42:23,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 18:42:23,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-08 18:42:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 872 transitions. [2024-11-08 18:42:23,448 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5043377674956623 [2024-11-08 18:42:23,448 INFO L175 Difference]: Start difference. First operand has 144 places, 160 transitions, 802 flow. Second operand 13 states and 872 transitions. [2024-11-08 18:42:23,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 251 transitions, 1646 flow [2024-11-08 18:42:23,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 251 transitions, 1645 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:42:23,461 INFO L231 Difference]: Finished difference. Result has 163 places, 196 transitions, 1387 flow [2024-11-08 18:42:23,462 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1387, PETRI_PLACES=163, PETRI_TRANSITIONS=196} [2024-11-08 18:42:23,462 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, 43 predicate places. [2024-11-08 18:42:23,463 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 196 transitions, 1387 flow [2024-11-08 18:42:23,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 58.42857142857143) internal successors, (818), 14 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:23,463 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:42:23,464 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:42:23,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 18:42:23,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 18:42:23,664 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:42:23,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:42:23,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1135362617, now seen corresponding path program 1 times [2024-11-08 18:42:23,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:42:23,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140522899] [2024-11-08 18:42:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:42:23,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:42:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:42:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:23,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:42:23,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140522899] [2024-11-08 18:42:23,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140522899] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:42:23,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:42:23,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:42:23,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239057101] [2024-11-08 18:42:23,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:42:23,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:42:23,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:42:23,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:42:23,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:42:23,858 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 133 [2024-11-08 18:42:23,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 196 transitions, 1387 flow. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:23,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:42:23,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 133 [2024-11-08 18:42:23,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:42:27,407 INFO L124 PetriNetUnfolderBase]: 13543/26706 cut-off events. [2024-11-08 18:42:27,407 INFO L125 PetriNetUnfolderBase]: For 2601/2601 co-relation queries the response was YES. [2024-11-08 18:42:27,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46760 conditions, 26706 events. 13543/26706 cut-off events. For 2601/2601 co-relation queries the response was YES. Maximal size of possible extension queue 1848. Compared 282439 event pairs, 9490 based on Foata normal form. 192/15454 useless extension candidates. Maximal degree in co-relation 46616. Up to 16757 conditions per place. [2024-11-08 18:42:27,690 INFO L140 encePairwiseOnDemand]: 123/133 looper letters, 234 selfloop transitions, 4 changer transitions 0/303 dead transitions. [2024-11-08 18:42:27,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 303 transitions, 2852 flow [2024-11-08 18:42:27,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:42:27,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:42:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 425 transitions. [2024-11-08 18:42:27,692 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6390977443609023 [2024-11-08 18:42:27,692 INFO L175 Difference]: Start difference. First operand has 163 places, 196 transitions, 1387 flow. Second operand 5 states and 425 transitions. [2024-11-08 18:42:27,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 303 transitions, 2852 flow [2024-11-08 18:42:27,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 303 transitions, 2811 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-11-08 18:42:27,714 INFO L231 Difference]: Finished difference. Result has 168 places, 197 transitions, 1396 flow [2024-11-08 18:42:27,714 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1396, PETRI_PLACES=168, PETRI_TRANSITIONS=197} [2024-11-08 18:42:27,715 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, 48 predicate places. [2024-11-08 18:42:27,715 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 197 transitions, 1396 flow [2024-11-08 18:42:27,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:27,716 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:42:27,716 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:42:27,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-08 18:42:27,716 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:42:27,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:42:27,717 INFO L85 PathProgramCache]: Analyzing trace with hash -2002310599, now seen corresponding path program 1 times [2024-11-08 18:42:27,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:42:27,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247733053] [2024-11-08 18:42:27,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:42:27,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:42:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:42:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:28,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:42:28,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247733053] [2024-11-08 18:42:28,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247733053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:42:28,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580262492] [2024-11-08 18:42:28,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:42:28,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:42:28,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:42:28,135 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:42:28,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 18:42:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:42:28,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 18:42:28,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:42:28,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 18:42:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:28,811 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:42:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:29,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580262492] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:42:29,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:42:29,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 13 [2024-11-08 18:42:29,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671226812] [2024-11-08 18:42:29,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:42:29,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 18:42:29,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:42:29,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 18:42:29,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-08 18:42:29,598 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 133 [2024-11-08 18:42:29,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 197 transitions, 1396 flow. Second operand has 15 states, 15 states have (on average 57.46666666666667) internal successors, (862), 15 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:29,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:42:29,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 133 [2024-11-08 18:42:29,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:42:33,634 INFO L124 PetriNetUnfolderBase]: 13507/26922 cut-off events. [2024-11-08 18:42:33,634 INFO L125 PetriNetUnfolderBase]: For 3858/3858 co-relation queries the response was YES. [2024-11-08 18:42:33,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51140 conditions, 26922 events. 13507/26922 cut-off events. For 3858/3858 co-relation queries the response was YES. Maximal size of possible extension queue 1867. Compared 288549 event pairs, 9466 based on Foata normal form. 24/15335 useless extension candidates. Maximal degree in co-relation 50999. Up to 17570 conditions per place. [2024-11-08 18:42:33,907 INFO L140 encePairwiseOnDemand]: 118/133 looper letters, 84 selfloop transitions, 64 changer transitions 0/196 dead transitions. [2024-11-08 18:42:33,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 196 transitions, 1642 flow [2024-11-08 18:42:33,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 18:42:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 18:42:33,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 518 transitions. [2024-11-08 18:42:33,913 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4868421052631579 [2024-11-08 18:42:33,913 INFO L175 Difference]: Start difference. First operand has 168 places, 197 transitions, 1396 flow. Second operand 8 states and 518 transitions. [2024-11-08 18:42:33,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 196 transitions, 1642 flow [2024-11-08 18:42:33,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 196 transitions, 1640 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:42:33,932 INFO L231 Difference]: Finished difference. Result has 174 places, 192 transitions, 1472 flow [2024-11-08 18:42:33,933 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1472, PETRI_PLACES=174, PETRI_TRANSITIONS=192} [2024-11-08 18:42:33,933 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, 54 predicate places. [2024-11-08 18:42:33,933 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 192 transitions, 1472 flow [2024-11-08 18:42:33,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 57.46666666666667) internal successors, (862), 15 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:33,934 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:42:33,934 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:42:33,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 18:42:34,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 18:42:34,135 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:42:34,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:42:34,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1889719561, now seen corresponding path program 1 times [2024-11-08 18:42:34,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:42:34,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462349424] [2024-11-08 18:42:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:42:34,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:42:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:42:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:42:34,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:42:34,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462349424] [2024-11-08 18:42:34,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462349424] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:42:34,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:42:34,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:42:34,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435698369] [2024-11-08 18:42:34,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:42:34,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:42:34,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:42:34,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:42:34,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:42:34,287 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 133 [2024-11-08 18:42:34,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 192 transitions, 1472 flow. Second operand has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:34,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:42:34,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 133 [2024-11-08 18:42:34,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:42:38,425 INFO L124 PetriNetUnfolderBase]: 14114/28741 cut-off events. [2024-11-08 18:42:38,425 INFO L125 PetriNetUnfolderBase]: For 6109/6109 co-relation queries the response was YES. [2024-11-08 18:42:38,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55108 conditions, 28741 events. 14114/28741 cut-off events. For 6109/6109 co-relation queries the response was YES. Maximal size of possible extension queue 1913. Compared 311018 event pairs, 9882 based on Foata normal form. 208/17211 useless extension candidates. Maximal degree in co-relation 54852. Up to 17659 conditions per place. [2024-11-08 18:42:38,737 INFO L140 encePairwiseOnDemand]: 115/133 looper letters, 169 selfloop transitions, 32 changer transitions 0/265 dead transitions. [2024-11-08 18:42:38,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 265 transitions, 2538 flow [2024-11-08 18:42:38,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:42:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:42:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 426 transitions. [2024-11-08 18:42:38,739 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6406015037593985 [2024-11-08 18:42:38,739 INFO L175 Difference]: Start difference. First operand has 174 places, 192 transitions, 1472 flow. Second operand 5 states and 426 transitions. [2024-11-08 18:42:38,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 265 transitions, 2538 flow [2024-11-08 18:42:38,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 265 transitions, 2240 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-11-08 18:42:38,762 INFO L231 Difference]: Finished difference. Result has 173 places, 215 transitions, 1767 flow [2024-11-08 18:42:38,763 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1767, PETRI_PLACES=173, PETRI_TRANSITIONS=215} [2024-11-08 18:42:38,764 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, 53 predicate places. [2024-11-08 18:42:38,764 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 215 transitions, 1767 flow [2024-11-08 18:42:38,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:38,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:42:38,764 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:42:38,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-08 18:42:38,765 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:42:38,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:42:38,765 INFO L85 PathProgramCache]: Analyzing trace with hash -823112018, now seen corresponding path program 2 times [2024-11-08 18:42:38,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:42:38,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157137488] [2024-11-08 18:42:38,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:42:38,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:42:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:42:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:39,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:42:39,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157137488] [2024-11-08 18:42:39,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157137488] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:42:39,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385551841] [2024-11-08 18:42:39,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:42:39,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:42:39,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:42:39,153 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:42:39,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 18:42:39,305 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:42:39,305 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:42:39,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 18:42:39,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:42:39,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:42:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 18:42:39,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:42:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 18:42:39,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385551841] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:42:39,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:42:39,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 17 [2024-11-08 18:42:39,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943745181] [2024-11-08 18:42:39,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:42:39,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-08 18:42:39,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:42:39,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-08 18:42:39,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-08 18:42:40,716 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 133 [2024-11-08 18:42:40,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 215 transitions, 1767 flow. Second operand has 18 states, 18 states have (on average 57.833333333333336) internal successors, (1041), 18 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:40,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:42:40,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 133 [2024-11-08 18:42:40,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:42:47,136 INFO L124 PetriNetUnfolderBase]: 20332/40638 cut-off events. [2024-11-08 18:42:47,136 INFO L125 PetriNetUnfolderBase]: For 9905/10033 co-relation queries the response was YES. [2024-11-08 18:42:47,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87787 conditions, 40638 events. 20332/40638 cut-off events. For 9905/10033 co-relation queries the response was YES. Maximal size of possible extension queue 2231. Compared 442749 event pairs, 14094 based on Foata normal form. 26/24020 useless extension candidates. Maximal degree in co-relation 87341. Up to 18857 conditions per place. [2024-11-08 18:42:47,799 INFO L140 encePairwiseOnDemand]: 112/133 looper letters, 204 selfloop transitions, 66 changer transitions 0/311 dead transitions. [2024-11-08 18:42:47,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 311 transitions, 2894 flow [2024-11-08 18:42:47,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 18:42:47,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-08 18:42:47,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1152 transitions. [2024-11-08 18:42:47,802 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48120300751879697 [2024-11-08 18:42:47,802 INFO L175 Difference]: Start difference. First operand has 173 places, 215 transitions, 1767 flow. Second operand 18 states and 1152 transitions. [2024-11-08 18:42:47,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 311 transitions, 2894 flow [2024-11-08 18:42:47,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 311 transitions, 2886 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:42:47,834 INFO L231 Difference]: Finished difference. Result has 194 places, 252 transitions, 2386 flow [2024-11-08 18:42:47,835 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=1757, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2386, PETRI_PLACES=194, PETRI_TRANSITIONS=252} [2024-11-08 18:42:47,835 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, 74 predicate places. [2024-11-08 18:42:47,835 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 252 transitions, 2386 flow [2024-11-08 18:42:47,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.833333333333336) internal successors, (1041), 18 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:42:47,836 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:42:47,837 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:42:47,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 18:42:48,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 18:42:48,037 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:42:48,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:42:48,038 INFO L85 PathProgramCache]: Analyzing trace with hash -297200404, now seen corresponding path program 1 times [2024-11-08 18:42:48,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:42:48,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658252520] [2024-11-08 18:42:48,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:42:48,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:42:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:42:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:48,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:42:48,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658252520] [2024-11-08 18:42:48,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658252520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:42:48,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212647431] [2024-11-08 18:42:48,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:42:48,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:42:48,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:42:48,539 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:42:48,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 18:42:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:42:48,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-08 18:42:48,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:42:48,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:42:48,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:42:48,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:42:48,946 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 18 treesize of output 13 [2024-11-08 18:42:48,958 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:42:48,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 18:42:49,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:42:49,127 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 18 treesize of output 13 [2024-11-08 18:42:49,135 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:42:49,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 18:42:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:49,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:42:49,362 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:42:49,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-08 18:42:49,610 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 18:42:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:42:49,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212647431] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:42:49,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:42:49,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2024-11-08 18:42:49,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695678590] [2024-11-08 18:42:49,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:42:49,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 18:42:49,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:42:49,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 18:42:49,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-11-08 18:42:53,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:42:58,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:43:02,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:43:03,725 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 133 [2024-11-08 18:43:03,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 252 transitions, 2386 flow. Second operand has 21 states, 21 states have (on average 60.857142857142854) internal successors, (1278), 21 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:43:03,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:43:03,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 133 [2024-11-08 18:43:03,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:43:12,337 INFO L124 PetriNetUnfolderBase]: 24352/45998 cut-off events. [2024-11-08 18:43:12,337 INFO L125 PetriNetUnfolderBase]: For 12546/12546 co-relation queries the response was YES. [2024-11-08 18:43:12,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102317 conditions, 45998 events. 24352/45998 cut-off events. For 12546/12546 co-relation queries the response was YES. Maximal size of possible extension queue 2640. Compared 488823 event pairs, 17490 based on Foata normal form. 0/27995 useless extension candidates. Maximal degree in co-relation 101855. Up to 31862 conditions per place. [2024-11-08 18:43:12,970 INFO L140 encePairwiseOnDemand]: 125/133 looper letters, 139 selfloop transitions, 44 changer transitions 0/266 dead transitions. [2024-11-08 18:43:12,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 266 transitions, 2903 flow [2024-11-08 18:43:12,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 18:43:12,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 18:43:12,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 544 transitions. [2024-11-08 18:43:12,972 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5112781954887218 [2024-11-08 18:43:12,972 INFO L175 Difference]: Start difference. First operand has 194 places, 252 transitions, 2386 flow. Second operand 8 states and 544 transitions. [2024-11-08 18:43:12,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 266 transitions, 2903 flow [2024-11-08 18:43:13,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 266 transitions, 2791 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-11-08 18:43:13,025 INFO L231 Difference]: Finished difference. Result has 197 places, 252 transitions, 2362 flow [2024-11-08 18:43:13,026 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=2270, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2362, PETRI_PLACES=197, PETRI_TRANSITIONS=252} [2024-11-08 18:43:13,026 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, 77 predicate places. [2024-11-08 18:43:13,026 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 252 transitions, 2362 flow [2024-11-08 18:43:13,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 60.857142857142854) internal successors, (1278), 21 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:43:13,027 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:43:13,027 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:43:13,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 18:43:13,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:43:13,228 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:43:13,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:43:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1462793451, now seen corresponding path program 1 times [2024-11-08 18:43:13,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:43:13,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459256806] [2024-11-08 18:43:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:43:13,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:43:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:43:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 18:43:13,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:43:13,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459256806] [2024-11-08 18:43:13,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459256806] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:43:13,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:43:13,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:43:13,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301123472] [2024-11-08 18:43:13,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:43:13,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:43:13,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:43:13,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:43:13,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:43:13,474 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 133 [2024-11-08 18:43:13,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 252 transitions, 2362 flow. Second operand has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:43:13,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:43:13,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 133 [2024-11-08 18:43:13,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:43:19,350 INFO L124 PetriNetUnfolderBase]: 16284/32929 cut-off events. [2024-11-08 18:43:19,351 INFO L125 PetriNetUnfolderBase]: For 11458/11584 co-relation queries the response was YES. [2024-11-08 18:43:19,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70580 conditions, 32929 events. 16284/32929 cut-off events. For 11458/11584 co-relation queries the response was YES. Maximal size of possible extension queue 1818. Compared 352527 event pairs, 11362 based on Foata normal form. 0/20203 useless extension candidates. Maximal degree in co-relation 70402. Up to 21304 conditions per place. [2024-11-08 18:43:19,726 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 95 selfloop transitions, 66 changer transitions 0/250 dead transitions. [2024-11-08 18:43:19,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 250 transitions, 2674 flow [2024-11-08 18:43:19,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:43:19,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:43:19,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 390 transitions. [2024-11-08 18:43:19,728 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5864661654135338 [2024-11-08 18:43:19,728 INFO L175 Difference]: Start difference. First operand has 197 places, 252 transitions, 2362 flow. Second operand 5 states and 390 transitions. [2024-11-08 18:43:19,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 250 transitions, 2674 flow [2024-11-08 18:43:19,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 250 transitions, 2561 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-08 18:43:19,766 INFO L231 Difference]: Finished difference. Result has 192 places, 250 transitions, 2371 flow [2024-11-08 18:43:19,766 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=2239, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2371, PETRI_PLACES=192, PETRI_TRANSITIONS=250} [2024-11-08 18:43:19,767 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, 72 predicate places. [2024-11-08 18:43:19,767 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 250 transitions, 2371 flow [2024-11-08 18:43:19,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:43:19,767 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:43:19,767 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:43:19,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-08 18:43:19,768 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:43:19,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:43:19,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1462793450, now seen corresponding path program 1 times [2024-11-08 18:43:19,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:43:19,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097278661] [2024-11-08 18:43:19,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:43:19,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:43:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:43:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:43:20,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:43:20,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097278661] [2024-11-08 18:43:20,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097278661] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:43:20,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51431138] [2024-11-08 18:43:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:43:20,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:43:20,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:43:20,264 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:43:20,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 18:43:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:43:20,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-08 18:43:20,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:43:20,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:43:20,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:43:20,580 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 18 treesize of output 13 [2024-11-08 18:43:20,600 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-08 18:43:20,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-08 18:43:20,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:43:20,652 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 18 treesize of output 13 [2024-11-08 18:43:20,672 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:43:20,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 18:43:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:43:20,727 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:43:20,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51431138] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:43:20,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 18:43:20,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2024-11-08 18:43:20,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831997058] [2024-11-08 18:43:20,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:43:20,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 18:43:20,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:43:20,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 18:43:20,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-08 18:43:21,070 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 133 [2024-11-08 18:43:21,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 250 transitions, 2371 flow. Second operand has 7 states, 7 states have (on average 61.142857142857146) internal successors, (428), 7 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:43:21,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:43:21,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 133 [2024-11-08 18:43:21,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:43:25,596 INFO L124 PetriNetUnfolderBase]: 12692/26078 cut-off events. [2024-11-08 18:43:25,596 INFO L125 PetriNetUnfolderBase]: For 9961/10069 co-relation queries the response was YES. [2024-11-08 18:43:25,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55211 conditions, 26078 events. 12692/26078 cut-off events. For 9961/10069 co-relation queries the response was YES. Maximal size of possible extension queue 1407. Compared 272241 event pairs, 8918 based on Foata normal form. 0/16807 useless extension candidates. Maximal degree in co-relation 55042. Up to 16992 conditions per place. [2024-11-08 18:43:25,909 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 152 selfloop transitions, 25 changer transitions 0/248 dead transitions. [2024-11-08 18:43:25,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 248 transitions, 2715 flow [2024-11-08 18:43:25,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:43:25,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:43:25,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 354 transitions. [2024-11-08 18:43:25,911 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5323308270676692 [2024-11-08 18:43:25,911 INFO L175 Difference]: Start difference. First operand has 192 places, 250 transitions, 2371 flow. Second operand 5 states and 354 transitions. [2024-11-08 18:43:25,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 248 transitions, 2715 flow [2024-11-08 18:43:25,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 248 transitions, 2583 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 18:43:25,941 INFO L231 Difference]: Finished difference. Result has 190 places, 248 transitions, 2279 flow [2024-11-08 18:43:25,941 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2279, PETRI_PLACES=190, PETRI_TRANSITIONS=248} [2024-11-08 18:43:25,941 INFO L277 CegarLoopForPetriNet]: 120 programPoint places, 70 predicate places. [2024-11-08 18:43:25,941 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 248 transitions, 2279 flow [2024-11-08 18:43:25,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 61.142857142857146) internal successors, (428), 7 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:43:25,942 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:43:25,942 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:43:25,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 18:43:26,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40ff5bc-305f-485c-9141-9e07df1b75e1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-08 18:43:26,147 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-08 18:43:26,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:43:26,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1462793449, now seen corresponding path program 1 times [2024-11-08 18:43:26,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:43:26,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068750136] [2024-11-08 18:43:26,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:43:26,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:43:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:43:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 18:43:26,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:43:26,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068750136] [2024-11-08 18:43:26,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068750136] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:43:26,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:43:26,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:43:26,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732401068] [2024-11-08 18:43:26,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:43:26,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 18:43:26,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:43:26,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 18:43:26,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 18:43:26,630 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 133 [2024-11-08 18:43:26,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 248 transitions, 2279 flow. Second operand has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:43:26,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:43:26,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 133 [2024-11-08 18:43:26,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand