./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:21:58,757 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:21:58,886 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:21:58,895 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:21:58,896 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:21:58,937 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:21:58,938 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:21:58,939 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:21:58,940 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:21:58,945 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:21:58,947 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:21:58,947 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:21:58,948 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:21:58,950 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:21:58,950 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:21:58,950 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:21:58,951 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:21:58,951 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:21:58,952 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:21:58,952 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:21:58,953 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:21:58,953 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:21:58,954 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:21:58,954 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:21:58,955 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:21:58,955 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:21:58,956 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:21:58,956 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:21:58,957 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:21:58,957 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:21:58,958 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:21:58,959 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:21:58,959 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:21:58,959 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:21:58,960 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:21:58,960 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:21:58,960 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:21:58,960 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:21:58,961 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_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a [2023-11-06 22:21:59,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:21:59,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:21:59,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:21:59,333 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:21:59,334 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:21:59,335 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2023-11-06 22:22:02,361 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:22:02,743 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:22:02,744 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2023-11-06 22:22:02,763 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/data/ac650cdd6/4c2f9291bd8a47c1b0f3de7738b06764/FLAG4268581f7 [2023-11-06 22:22:02,778 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/data/ac650cdd6/4c2f9291bd8a47c1b0f3de7738b06764 [2023-11-06 22:22:02,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:22:02,783 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:22:02,784 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:22:02,785 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:22:02,793 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:22:02,794 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:22:02" (1/1) ... [2023-11-06 22:22:02,795 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@366b3009 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:02, skipping insertion in model container [2023-11-06 22:22:02,796 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:22:02" (1/1) ... [2023-11-06 22:22:02,867 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:22:03,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:22:03,557 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:22:03,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:22:03,681 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:22:03,681 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:03 WrapperNode [2023-11-06 22:22:03,682 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:22:03,683 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:22:03,683 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:22:03,683 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:22:03,691 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:03" (1/1) ... [2023-11-06 22:22:03,723 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:03" (1/1) ... [2023-11-06 22:22:03,778 INFO L138 Inliner]: procedures = 278, calls = 61, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 239 [2023-11-06 22:22:03,778 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:22:03,779 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:22:03,779 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:22:03,779 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:22:03,795 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:03" (1/1) ... [2023-11-06 22:22:03,795 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:03" (1/1) ... [2023-11-06 22:22:03,801 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:03" (1/1) ... [2023-11-06 22:22:03,802 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:03" (1/1) ... [2023-11-06 22:22:03,815 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:03" (1/1) ... [2023-11-06 22:22:03,837 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:03" (1/1) ... [2023-11-06 22:22:03,841 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:03" (1/1) ... [2023-11-06 22:22:03,859 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:03" (1/1) ... [2023-11-06 22:22:03,864 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:22:03,865 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:22:03,865 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:22:03,865 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:22:03,866 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:03" (1/1) ... [2023-11-06 22:22:03,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:22:03,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:03,909 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:22:03,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:22:03,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:22:03,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 22:22:03,956 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-11-06 22:22:03,957 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-11-06 22:22:03,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:22:03,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:22:03,958 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-11-06 22:22:03,958 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-11-06 22:22:03,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:22:03,959 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:22:03,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:22:03,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:22:03,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 22:22:03,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:22:03,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:22:03,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:22:03,962 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:22:04,139 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:22:04,142 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:22:04,732 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:22:04,744 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:22:04,744 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-06 22:22:04,747 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:22:04 BoogieIcfgContainer [2023-11-06 22:22:04,748 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:22:04,750 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:22:04,750 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:22:04,754 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:22:04,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:22:02" (1/3) ... [2023-11-06 22:22:04,755 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4b9e55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:22:04, skipping insertion in model container [2023-11-06 22:22:04,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:03" (2/3) ... [2023-11-06 22:22:04,756 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4b9e55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:22:04, skipping insertion in model container [2023-11-06 22:22:04,756 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:22:04" (3/3) ... [2023-11-06 22:22:04,757 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2023-11-06 22:22:04,777 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:22:04,777 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-06 22:22:04,778 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:22:04,993 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 22:22:05,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 298 transitions, 616 flow [2023-11-06 22:22:05,278 INFO L124 PetriNetUnfolderBase]: 56/567 cut-off events. [2023-11-06 22:22:05,278 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-06 22:22:05,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 567 events. 56/567 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2653 event pairs, 0 based on Foata normal form. 0/419 useless extension candidates. Maximal degree in co-relation 284. Up to 8 conditions per place. [2023-11-06 22:22:05,293 INFO L82 GeneralOperation]: Start removeDead. Operand has 277 places, 298 transitions, 616 flow [2023-11-06 22:22:05,306 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 277 places, 298 transitions, 616 flow [2023-11-06 22:22:05,310 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:22:05,321 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 277 places, 298 transitions, 616 flow [2023-11-06 22:22:05,324 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 277 places, 298 transitions, 616 flow [2023-11-06 22:22:05,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 298 transitions, 616 flow [2023-11-06 22:22:05,445 INFO L124 PetriNetUnfolderBase]: 56/567 cut-off events. [2023-11-06 22:22:05,445 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-06 22:22:05,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 567 events. 56/567 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2653 event pairs, 0 based on Foata normal form. 0/419 useless extension candidates. Maximal degree in co-relation 284. Up to 8 conditions per place. [2023-11-06 22:22:05,482 INFO L119 LiptonReduction]: Number of co-enabled transitions 30162 [2023-11-06 22:22:17,784 INFO L134 LiptonReduction]: Checked pairs total: 76105 [2023-11-06 22:22:17,784 INFO L136 LiptonReduction]: Total number of compositions: 280 [2023-11-06 22:22:17,801 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:22:17,808 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5f4607d6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:22:17,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2023-11-06 22:22:17,812 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:22:17,812 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-11-06 22:22:17,812 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:22:17,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:17,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:22:17,814 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-06 22:22:17,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:17,819 INFO L85 PathProgramCache]: Analyzing trace with hash 37837, now seen corresponding path program 1 times [2023-11-06 22:22:17,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:17,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204331581] [2023-11-06 22:22:17,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:17,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:18,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:18,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204331581] [2023-11-06 22:22:18,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204331581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:18,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:18,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:22:18,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294208548] [2023-11-06 22:22:18,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:18,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:22:18,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:18,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:22:18,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:22:18,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 578 [2023-11-06 22:22:18,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 116 transitions, 252 flow. Second operand has 2 states, 2 states have (on average 274.0) internal successors, (548), 2 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:18,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:18,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 578 [2023-11-06 22:22:18,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:22,424 INFO L124 PetriNetUnfolderBase]: 17637/30439 cut-off events. [2023-11-06 22:22:22,424 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2023-11-06 22:22:22,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57564 conditions, 30439 events. 17637/30439 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 246917 event pairs, 16922 based on Foata normal form. 1181/15498 useless extension candidates. Maximal degree in co-relation 54865. Up to 26986 conditions per place. [2023-11-06 22:22:22,681 INFO L140 encePairwiseOnDemand]: 562/578 looper letters, 80 selfloop transitions, 0 changer transitions 0/99 dead transitions. [2023-11-06 22:22:22,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 99 transitions, 378 flow [2023-11-06 22:22:22,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:22:22,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:22:22,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 642 transitions. [2023-11-06 22:22:22,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5553633217993079 [2023-11-06 22:22:22,707 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 642 transitions. [2023-11-06 22:22:22,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 642 transitions. [2023-11-06 22:22:22,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:22,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 642 transitions. [2023-11-06 22:22:22,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 321.0) internal successors, (642), 2 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:22,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 578.0) internal successors, (1734), 3 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:22,733 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 578.0) internal successors, (1734), 3 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:22,735 INFO L175 Difference]: Start difference. First operand has 102 places, 116 transitions, 252 flow. Second operand 2 states and 642 transitions. [2023-11-06 22:22:22,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 99 transitions, 378 flow [2023-11-06 22:22:22,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 99 transitions, 378 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:22:22,757 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 218 flow [2023-11-06 22:22:22,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=218, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2023-11-06 22:22:22,764 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -4 predicate places. [2023-11-06 22:22:22,765 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 218 flow [2023-11-06 22:22:22,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 274.0) internal successors, (548), 2 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:22,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:22,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:22:22,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:22:22,767 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-06 22:22:22,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:22,777 INFO L85 PathProgramCache]: Analyzing trace with hash 37856, now seen corresponding path program 1 times [2023-11-06 22:22:22,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:22,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545849504] [2023-11-06 22:22:22,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:22,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:23,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:23,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545849504] [2023-11-06 22:22:23,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545849504] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:23,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:23,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:22:23,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210601612] [2023-11-06 22:22:23,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:23,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:22:23,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:23,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:22:23,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:22:23,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 578 [2023-11-06 22:22:23,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:23,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:23,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 578 [2023-11-06 22:22:23,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:27,079 INFO L124 PetriNetUnfolderBase]: 17366/29238 cut-off events. [2023-11-06 22:22:27,079 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2023-11-06 22:22:27,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56097 conditions, 29238 events. 17366/29238 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 1070. Compared 231772 event pairs, 11890 based on Foata normal form. 0/14379 useless extension candidates. Maximal degree in co-relation 56092. Up to 18802 conditions per place. [2023-11-06 22:22:27,257 INFO L140 encePairwiseOnDemand]: 573/578 looper letters, 122 selfloop transitions, 2 changer transitions 0/142 dead transitions. [2023-11-06 22:22:27,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 142 transitions, 552 flow [2023-11-06 22:22:27,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:22:27,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:22:27,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 931 transitions. [2023-11-06 22:22:27,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369088811995386 [2023-11-06 22:22:27,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 931 transitions. [2023-11-06 22:22:27,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 931 transitions. [2023-11-06 22:22:27,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:27,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 931 transitions. [2023-11-06 22:22:27,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 310.3333333333333) internal successors, (931), 3 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:27,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:27,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:27,277 INFO L175 Difference]: Start difference. First operand has 98 places, 99 transitions, 218 flow. Second operand 3 states and 931 transitions. [2023-11-06 22:22:27,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 142 transitions, 552 flow [2023-11-06 22:22:27,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 142 transitions, 552 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:22:27,294 INFO L231 Difference]: Finished difference. Result has 100 places, 98 transitions, 226 flow [2023-11-06 22:22:27,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=100, PETRI_TRANSITIONS=98} [2023-11-06 22:22:27,297 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -2 predicate places. [2023-11-06 22:22:27,301 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 98 transitions, 226 flow [2023-11-06 22:22:27,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:27,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:27,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:22:27,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:22:27,310 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-06 22:22:27,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:27,315 INFO L85 PathProgramCache]: Analyzing trace with hash 37855, now seen corresponding path program 1 times [2023-11-06 22:22:27,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:27,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728319619] [2023-11-06 22:22:27,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:27,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:27,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:27,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728319619] [2023-11-06 22:22:27,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728319619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:27,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:27,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:22:27,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890557473] [2023-11-06 22:22:27,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:27,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:22:27,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:27,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:22:27,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:22:27,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 578 [2023-11-06 22:22:27,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 98 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:27,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:27,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 578 [2023-11-06 22:22:27,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:31,214 INFO L124 PetriNetUnfolderBase]: 17456/30114 cut-off events. [2023-11-06 22:22:31,215 INFO L125 PetriNetUnfolderBase]: For 874/874 co-relation queries the response was YES. [2023-11-06 22:22:31,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58242 conditions, 30114 events. 17456/30114 cut-off events. For 874/874 co-relation queries the response was YES. Maximal size of possible extension queue 1030. Compared 239767 event pairs, 16735 based on Foata normal form. 0/15602 useless extension candidates. Maximal degree in co-relation 58235. Up to 26725 conditions per place. [2023-11-06 22:22:31,405 INFO L140 encePairwiseOnDemand]: 574/578 looper letters, 79 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-11-06 22:22:31,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 99 transitions, 390 flow [2023-11-06 22:22:31,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:22:31,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:22:31,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 869 transitions. [2023-11-06 22:22:31,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5011534025374856 [2023-11-06 22:22:31,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 869 transitions. [2023-11-06 22:22:31,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 869 transitions. [2023-11-06 22:22:31,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:31,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 869 transitions. [2023-11-06 22:22:31,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:31,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:31,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:31,422 INFO L175 Difference]: Start difference. First operand has 100 places, 98 transitions, 226 flow. Second operand 3 states and 869 transitions. [2023-11-06 22:22:31,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 99 transitions, 390 flow [2023-11-06 22:22:31,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 386 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:22:31,438 INFO L231 Difference]: Finished difference. Result has 101 places, 99 transitions, 236 flow [2023-11-06 22:22:31,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=101, PETRI_TRANSITIONS=99} [2023-11-06 22:22:31,440 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -1 predicate places. [2023-11-06 22:22:31,440 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 99 transitions, 236 flow [2023-11-06 22:22:31,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:31,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:31,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:22:31,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:22:31,442 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-06 22:22:31,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:31,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1174625, now seen corresponding path program 1 times [2023-11-06 22:22:31,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:31,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359674043] [2023-11-06 22:22:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:31,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:31,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:31,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359674043] [2023-11-06 22:22:31,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359674043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:31,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739528200] [2023-11-06 22:22:31,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:31,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:31,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:31,888 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:31,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:22:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:32,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:22:32,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:32,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:32,186 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:22:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:32,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:32,334 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:32,335 INFO L351 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 46 treesize of output 64 [2023-11-06 22:22:32,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:32,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739528200] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:32,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:22:32,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-06 22:22:32,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045004666] [2023-11-06 22:22:32,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:32,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:22:32,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:32,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:22:32,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:22:35,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 578 [2023-11-06 22:22:35,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 99 transitions, 236 flow. Second operand has 8 states, 8 states have (on average 253.125) internal successors, (2025), 8 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:35,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:35,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 578 [2023-11-06 22:22:35,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:38,679 INFO L124 PetriNetUnfolderBase]: 17458/30119 cut-off events. [2023-11-06 22:22:38,680 INFO L125 PetriNetUnfolderBase]: For 375/375 co-relation queries the response was YES. [2023-11-06 22:22:38,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57753 conditions, 30119 events. 17458/30119 cut-off events. For 375/375 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 239823 event pairs, 16735 based on Foata normal form. 0/15095 useless extension candidates. Maximal degree in co-relation 57745. Up to 26727 conditions per place. [2023-11-06 22:22:38,856 INFO L140 encePairwiseOnDemand]: 574/578 looper letters, 79 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2023-11-06 22:22:38,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 104 transitions, 428 flow [2023-11-06 22:22:38,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:22:38,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:22:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1602 transitions. [2023-11-06 22:22:38,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4619377162629758 [2023-11-06 22:22:38,864 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1602 transitions. [2023-11-06 22:22:38,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1602 transitions. [2023-11-06 22:22:38,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:38,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1602 transitions. [2023-11-06 22:22:38,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:38,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 578.0) internal successors, (4046), 7 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:38,884 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 578.0) internal successors, (4046), 7 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:38,884 INFO L175 Difference]: Start difference. First operand has 101 places, 99 transitions, 236 flow. Second operand 6 states and 1602 transitions. [2023-11-06 22:22:38,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 104 transitions, 428 flow [2023-11-06 22:22:38,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 104 transitions, 424 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:22:38,900 INFO L231 Difference]: Finished difference. Result has 108 places, 104 transitions, 284 flow [2023-11-06 22:22:38,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=108, PETRI_TRANSITIONS=104} [2023-11-06 22:22:38,902 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 6 predicate places. [2023-11-06 22:22:38,903 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 104 transitions, 284 flow [2023-11-06 22:22:38,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 253.125) internal successors, (2025), 8 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:38,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:38,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-06 22:22:38,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:39,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:39,126 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-06 22:22:39,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:39,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1128848290, now seen corresponding path program 1 times [2023-11-06 22:22:39,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:39,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128964228] [2023-11-06 22:22:39,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:39,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:22:39,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:39,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128964228] [2023-11-06 22:22:39,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128964228] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:39,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:39,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:22:39,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506611243] [2023-11-06 22:22:39,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:39,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:22:39,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:39,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:22:39,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:22:39,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 578 [2023-11-06 22:22:39,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 104 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:39,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:39,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 578 [2023-11-06 22:22:39,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:42,428 INFO L124 PetriNetUnfolderBase]: 16393/27570 cut-off events. [2023-11-06 22:22:42,428 INFO L125 PetriNetUnfolderBase]: For 343/343 co-relation queries the response was YES. [2023-11-06 22:22:42,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53737 conditions, 27570 events. 16393/27570 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 216955 event pairs, 10949 based on Foata normal form. 0/14029 useless extension candidates. Maximal degree in co-relation 53726. Up to 17316 conditions per place. [2023-11-06 22:22:42,596 INFO L140 encePairwiseOnDemand]: 574/578 looper letters, 124 selfloop transitions, 4 changer transitions 0/146 dead transitions. [2023-11-06 22:22:42,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 146 transitions, 624 flow [2023-11-06 22:22:42,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:22:42,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:22:42,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 913 transitions. [2023-11-06 22:22:42,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5265282583621684 [2023-11-06 22:22:42,602 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 913 transitions. [2023-11-06 22:22:42,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 913 transitions. [2023-11-06 22:22:42,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:42,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 913 transitions. [2023-11-06 22:22:42,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.3333333333333) internal successors, (913), 3 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:42,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:42,613 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:42,614 INFO L175 Difference]: Start difference. First operand has 108 places, 104 transitions, 284 flow. Second operand 3 states and 913 transitions. [2023-11-06 22:22:42,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 146 transitions, 624 flow [2023-11-06 22:22:42,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 146 transitions, 606 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-06 22:22:42,622 INFO L231 Difference]: Finished difference. Result has 107 places, 102 transitions, 270 flow [2023-11-06 22:22:42,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=107, PETRI_TRANSITIONS=102} [2023-11-06 22:22:42,623 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 5 predicate places. [2023-11-06 22:22:42,623 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 102 transitions, 270 flow [2023-11-06 22:22:42,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:42,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:42,625 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-06 22:22:42,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:22:42,625 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-06 22:22:42,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:42,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1128848291, now seen corresponding path program 1 times [2023-11-06 22:22:42,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:42,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447786600] [2023-11-06 22:22:42,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:42,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:42,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:42,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447786600] [2023-11-06 22:22:42,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447786600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:42,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337103961] [2023-11-06 22:22:42,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:42,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:42,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:42,728 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:42,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:22:42,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:42,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:22:42,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:42,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:42,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337103961] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:42,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:22:42,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-06 22:22:42,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325719420] [2023-11-06 22:22:42,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:42,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:22:42,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:42,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:22:42,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:22:42,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 578 [2023-11-06 22:22:42,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 102 transitions, 270 flow. Second operand has 9 states, 9 states have (on average 267.22222222222223) internal successors, (2405), 9 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:42,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:22:42,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 578 [2023-11-06 22:22:42,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:22:46,237 INFO L124 PetriNetUnfolderBase]: 15428/26734 cut-off events. [2023-11-06 22:22:46,238 INFO L125 PetriNetUnfolderBase]: For 840/840 co-relation queries the response was YES. [2023-11-06 22:22:46,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51771 conditions, 26734 events. 15428/26734 cut-off events. For 840/840 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 215070 event pairs, 14776 based on Foata normal form. 4/13818 useless extension candidates. Maximal degree in co-relation 51759. Up to 23645 conditions per place. [2023-11-06 22:22:46,396 INFO L140 encePairwiseOnDemand]: 574/578 looper letters, 77 selfloop transitions, 8 changer transitions 0/104 dead transitions. [2023-11-06 22:22:46,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 104 transitions, 458 flow [2023-11-06 22:22:46,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:22:46,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:22:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2217 transitions. [2023-11-06 22:22:46,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47945501730103807 [2023-11-06 22:22:46,405 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2217 transitions. [2023-11-06 22:22:46,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2217 transitions. [2023-11-06 22:22:46,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:22:46,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2217 transitions. [2023-11-06 22:22:46,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 277.125) internal successors, (2217), 8 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:46,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 578.0) internal successors, (5202), 9 states have internal predecessors, (5202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:46,428 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 578.0) internal successors, (5202), 9 states have internal predecessors, (5202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:46,429 INFO L175 Difference]: Start difference. First operand has 107 places, 102 transitions, 270 flow. Second operand 8 states and 2217 transitions. [2023-11-06 22:22:46,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 104 transitions, 458 flow [2023-11-06 22:22:46,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 104 transitions, 454 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:22:46,441 INFO L231 Difference]: Finished difference. Result has 115 places, 103 transitions, 306 flow [2023-11-06 22:22:46,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=306, PETRI_PLACES=115, PETRI_TRANSITIONS=103} [2023-11-06 22:22:46,443 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 13 predicate places. [2023-11-06 22:22:46,443 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 103 transitions, 306 flow [2023-11-06 22:22:46,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 267.22222222222223) internal successors, (2405), 9 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:46,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:22:46,445 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 22:22:46,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:46,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:22:46,652 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-06 22:22:46,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:46,653 INFO L85 PathProgramCache]: Analyzing trace with hash 634627167, now seen corresponding path program 2 times [2023-11-06 22:22:46,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:46,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723127550] [2023-11-06 22:22:46,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:46,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:47,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:47,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723127550] [2023-11-06 22:22:47,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723127550] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:22:47,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66665195] [2023-11-06 22:22:47,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:22:47,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:47,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:47,472 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:47,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:22:47,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:22:47,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:22:47,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-06 22:22:47,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:47,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:47,851 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:22:47,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:47,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:22:47,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:47,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:22:48,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:22:48,016 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:22:48,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:48,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:48,153 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:48,153 INFO L351 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 46 treesize of output 64 [2023-11-06 22:22:48,334 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:48,335 INFO L351 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 52 treesize of output 70 [2023-11-06 22:22:48,746 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:48,747 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 133 [2023-11-06 22:22:50,158 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:22:50,159 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 145 [2023-11-06 22:22:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:51,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66665195] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:51,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:22:51,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-06 22:22:51,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847480809] [2023-11-06 22:22:51,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:51,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:22:51,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:51,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:22:51,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:23:09,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:23:14,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 578 [2023-11-06 22:23:14,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 103 transitions, 306 flow. Second operand has 17 states, 17 states have (on average 253.05882352941177) internal successors, (4302), 17 states have internal predecessors, (4302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:14,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:14,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 578 [2023-11-06 22:23:14,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:21,123 INFO L124 PetriNetUnfolderBase]: 16485/28465 cut-off events. [2023-11-06 22:23:21,123 INFO L125 PetriNetUnfolderBase]: For 425/425 co-relation queries the response was YES. [2023-11-06 22:23:21,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54677 conditions, 28465 events. 16485/28465 cut-off events. For 425/425 co-relation queries the response was YES. Maximal size of possible extension queue 969. Compared 225254 event pairs, 15794 based on Foata normal form. 6/14518 useless extension candidates. Maximal degree in co-relation 54663. Up to 25244 conditions per place. [2023-11-06 22:23:21,316 INFO L140 encePairwiseOnDemand]: 574/578 looper letters, 77 selfloop transitions, 15 changer transitions 0/110 dead transitions. [2023-11-06 22:23:21,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 110 transitions, 550 flow [2023-11-06 22:23:21,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:23:21,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:23:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3122 transitions. [2023-11-06 22:23:21,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45011534025374855 [2023-11-06 22:23:21,333 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3122 transitions. [2023-11-06 22:23:21,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3122 transitions. [2023-11-06 22:23:21,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:21,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3122 transitions. [2023-11-06 22:23:21,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 260.1666666666667) internal successors, (3122), 12 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:21,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 578.0) internal successors, (7514), 13 states have internal predecessors, (7514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:21,370 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 578.0) internal successors, (7514), 13 states have internal predecessors, (7514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:21,370 INFO L175 Difference]: Start difference. First operand has 115 places, 103 transitions, 306 flow. Second operand 12 states and 3122 transitions. [2023-11-06 22:23:21,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 110 transitions, 550 flow [2023-11-06 22:23:21,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 110 transitions, 517 flow, removed 8 selfloop flow, removed 8 redundant places. [2023-11-06 22:23:21,383 INFO L231 Difference]: Finished difference. Result has 122 places, 110 transitions, 387 flow [2023-11-06 22:23:21,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=387, PETRI_PLACES=122, PETRI_TRANSITIONS=110} [2023-11-06 22:23:21,384 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 20 predicate places. [2023-11-06 22:23:21,385 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 110 transitions, 387 flow [2023-11-06 22:23:21,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 253.05882352941177) internal successors, (4302), 17 states have internal predecessors, (4302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:21,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:21,388 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1] [2023-11-06 22:23:21,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:21,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:23:21,597 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-06 22:23:21,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:21,597 INFO L85 PathProgramCache]: Analyzing trace with hash -266994909, now seen corresponding path program 2 times [2023-11-06 22:23:21,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:21,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68933644] [2023-11-06 22:23:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:21,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:21,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:21,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68933644] [2023-11-06 22:23:21,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68933644] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:23:21,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643554437] [2023-11-06 22:23:21,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:23:21,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:21,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:21,976 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:21,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:23:22,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:23:22,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:23:22,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:23:22,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:22,217 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:23:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 22:23:22,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:23:22,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643554437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:23:22,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:23:22,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2023-11-06 22:23:22,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218738833] [2023-11-06 22:23:22,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:23:22,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:23:22,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:22,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:23:22,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:23:22,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 578 [2023-11-06 22:23:22,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 110 transitions, 387 flow. Second operand has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:22,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:22,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 578 [2023-11-06 22:23:22,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:25,583 INFO L124 PetriNetUnfolderBase]: 15279/25946 cut-off events. [2023-11-06 22:23:25,583 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2023-11-06 22:23:25,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50230 conditions, 25946 events. 15279/25946 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 201642 event pairs, 14649 based on Foata normal form. 0/13187 useless extension candidates. Maximal degree in co-relation 50214. Up to 23356 conditions per place. [2023-11-06 22:23:25,768 INFO L140 encePairwiseOnDemand]: 573/578 looper letters, 87 selfloop transitions, 7 changer transitions 0/113 dead transitions. [2023-11-06 22:23:25,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 113 transitions, 581 flow [2023-11-06 22:23:25,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:23:25,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:23:25,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 874 transitions. [2023-11-06 22:23:25,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040369088811996 [2023-11-06 22:23:25,774 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 874 transitions. [2023-11-06 22:23:25,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 874 transitions. [2023-11-06 22:23:25,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:25,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 874 transitions. [2023-11-06 22:23:25,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.3333333333333) internal successors, (874), 3 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:25,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:25,785 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:25,785 INFO L175 Difference]: Start difference. First operand has 122 places, 110 transitions, 387 flow. Second operand 3 states and 874 transitions. [2023-11-06 22:23:25,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 113 transitions, 581 flow [2023-11-06 22:23:25,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 113 transitions, 492 flow, removed 36 selfloop flow, removed 8 redundant places. [2023-11-06 22:23:25,793 INFO L231 Difference]: Finished difference. Result has 117 places, 112 transitions, 331 flow [2023-11-06 22:23:25,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=331, PETRI_PLACES=117, PETRI_TRANSITIONS=112} [2023-11-06 22:23:25,795 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 15 predicate places. [2023-11-06 22:23:25,795 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 112 transitions, 331 flow [2023-11-06 22:23:25,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:25,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:25,796 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2023-11-06 22:23:25,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 22:23:26,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:23:26,001 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-06 22:23:26,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:26,001 INFO L85 PathProgramCache]: Analyzing trace with hash 234910683, now seen corresponding path program 1 times [2023-11-06 22:23:26,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:26,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590861915] [2023-11-06 22:23:26,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:26,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:23:26,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:26,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590861915] [2023-11-06 22:23:26,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590861915] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:23:26,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325791824] [2023-11-06 22:23:26,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:26,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:26,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:26,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:26,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:23:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:26,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:23:26,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:23:26,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:23:26,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325791824] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:26,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:23:26,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-11-06 22:23:26,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945803471] [2023-11-06 22:23:26,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:26,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:23:26,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:26,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:23:26,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:23:26,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 578 [2023-11-06 22:23:26,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 112 transitions, 331 flow. Second operand has 17 states, 17 states have (on average 267.29411764705884) internal successors, (4544), 17 states have internal predecessors, (4544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:26,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:23:26,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 578 [2023-11-06 22:23:26,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:23:30,549 INFO L124 PetriNetUnfolderBase]: 15276/25999 cut-off events. [2023-11-06 22:23:30,549 INFO L125 PetriNetUnfolderBase]: For 989/989 co-relation queries the response was YES. [2023-11-06 22:23:30,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50806 conditions, 25999 events. 15276/25999 cut-off events. For 989/989 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 202534 event pairs, 14176 based on Foata normal form. 8/13279 useless extension candidates. Maximal degree in co-relation 50790. Up to 23348 conditions per place. [2023-11-06 22:23:30,737 INFO L140 encePairwiseOnDemand]: 574/578 looper letters, 81 selfloop transitions, 16 changer transitions 0/116 dead transitions. [2023-11-06 22:23:30,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 116 transitions, 581 flow [2023-11-06 22:23:30,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:23:30,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 22:23:30,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4359 transitions. [2023-11-06 22:23:30,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47134515570934254 [2023-11-06 22:23:30,759 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4359 transitions. [2023-11-06 22:23:30,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4359 transitions. [2023-11-06 22:23:30,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:23:30,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4359 transitions. [2023-11-06 22:23:30,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 272.4375) internal successors, (4359), 16 states have internal predecessors, (4359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:30,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 578.0) internal successors, (9826), 17 states have internal predecessors, (9826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:30,804 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 578.0) internal successors, (9826), 17 states have internal predecessors, (9826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:30,804 INFO L175 Difference]: Start difference. First operand has 117 places, 112 transitions, 331 flow. Second operand 16 states and 4359 transitions. [2023-11-06 22:23:30,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 116 transitions, 581 flow [2023-11-06 22:23:30,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 116 transitions, 578 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:23:30,812 INFO L231 Difference]: Finished difference. Result has 136 places, 113 transitions, 398 flow [2023-11-06 22:23:30,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=398, PETRI_PLACES=136, PETRI_TRANSITIONS=113} [2023-11-06 22:23:30,814 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 34 predicate places. [2023-11-06 22:23:30,814 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 113 transitions, 398 flow [2023-11-06 22:23:30,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 267.29411764705884) internal successors, (4544), 17 states have internal predecessors, (4544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:23:30,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:23:30,816 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-11-06 22:23:30,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:31,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:31,025 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-06 22:23:31,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:31,025 INFO L85 PathProgramCache]: Analyzing trace with hash 299975967, now seen corresponding path program 3 times [2023-11-06 22:23:31,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:31,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550734468] [2023-11-06 22:23:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:31,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:34,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:34,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550734468] [2023-11-06 22:23:34,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550734468] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:23:34,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655880337] [2023-11-06 22:23:34,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:23:34,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:34,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:34,160 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:34,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac572e03-6d54-4a31-bb17-e931fdda6f7c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:23:55,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 22:23:55,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:23:55,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 84 conjunts are in the unsatisfiable core [2023-11-06 22:23:55,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:55,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:55,207 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:23:55,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:55,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:23:55,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:55,330 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:23:55,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:55,401 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-11-06 22:23:55,415 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:23:55,416 INFO L351 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 [2023-11-06 22:23:55,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:55,513 INFO L322 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-06 22:23:55,514 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 21 [2023-11-06 22:23:55,527 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:23:55,528 INFO L351 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 [2023-11-06 22:23:55,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:55,594 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:23:55,655 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-06 22:23:55,655 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-11-06 22:23:55,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:55,764 INFO L322 Elim1Store]: treesize reduction 30, result has 26.8 percent of original size [2023-11-06 22:23:55,765 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 27 [2023-11-06 22:23:55,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:55,883 INFO L322 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-11-06 22:23:55,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 33 [2023-11-06 22:23:55,899 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 22:23:55,899 INFO L351 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 [2023-11-06 22:23:55,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:23:55,971 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 22:23:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:23:56,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:56,140 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:23:56,140 INFO L351 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 13 treesize of output 12 [2023-11-06 22:23:56,262 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:23:56,262 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-06 22:23:56,425 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:23:56,426 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-06 22:23:56,892 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:23:56,893 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-06 22:23:57,156 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:23:57,156 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-06 22:23:57,377 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:23:57,378 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-06 22:24:01,674 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:24:01,675 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-06 22:24:02,006 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:24:02,006 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-06 22:24:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:24:04,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655880337] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:24:04,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:24:04,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-06 22:24:04,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26348019] [2023-11-06 22:24:04,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:24:04,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 22:24:04,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:24:04,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 22:24:04,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=925, Unknown=3, NotChecked=0, Total=1190 [2023-11-06 22:24:08,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:12,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:15,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:18,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:20,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:24,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:27,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:30,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:32,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:34,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:37,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:40,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:43,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:46,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:52,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:54,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:24:57,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:25:01,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:25:03,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:25:05,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:25:07,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:25:09,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:25:11,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:25:17,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:25:19,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:25:22,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:25:24,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 578 [2023-11-06 22:25:24,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 113 transitions, 398 flow. Second operand has 35 states, 35 states have (on average 230.02857142857144) internal successors, (8051), 35 states have internal predecessors, (8051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:25:24,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:24,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 578 [2023-11-06 22:25:24,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:28,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:25:37,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]