./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/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_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/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_787abad8-8256-418c-9453-a5e62a90ee94/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 b29c7049a333b10d890b8afae901738020ed1f084c2a7d471b316f0abdba3430 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:08:44,521 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:08:44,614 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 23:08:44,620 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:08:44,620 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:08:44,656 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:08:44,657 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:08:44,657 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:08:44,658 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:08:44,663 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:08:44,667 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:08:44,667 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:08:44,668 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:08:44,669 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:08:44,670 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:08:44,670 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:08:44,671 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:08:44,671 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:08:44,671 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 23:08:44,672 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 23:08:44,672 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 23:08:44,673 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:08:44,673 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 23:08:44,673 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:08:44,674 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:08:44,674 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:08:44,675 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:08:44,675 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:08:44,676 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:08:44,676 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:08:44,677 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:08:44,677 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:08:44,678 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:08:44,678 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:08:44,678 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:08:44,678 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:08:44,678 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:08:44,679 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:08:44,692 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_787abad8-8256-418c-9453-a5e62a90ee94/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b29c7049a333b10d890b8afae901738020ed1f084c2a7d471b316f0abdba3430 [2023-11-06 23:08:44,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:08:45,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:08:45,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:08:45,032 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:08:45,033 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:08:45,034 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i [2023-11-06 23:08:48,177 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:08:48,538 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:08:48,538 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i [2023-11-06 23:08:48,565 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/data/4c50b7ce5/048701f6674b4dc9adece97a6dcbd759/FLAG6d19206c5 [2023-11-06 23:08:48,584 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/data/4c50b7ce5/048701f6674b4dc9adece97a6dcbd759 [2023-11-06 23:08:48,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:08:48,596 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:08:48,600 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:08:48,601 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:08:48,606 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:08:48,608 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:08:48" (1/1) ... [2023-11-06 23:08:48,609 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6705d4e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:48, skipping insertion in model container [2023-11-06 23:08:48,610 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:08:48" (1/1) ... [2023-11-06 23:08:48,703 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:08:49,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:08:49,610 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:08:49,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:08:49,795 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:08:49,795 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:49 WrapperNode [2023-11-06 23:08:49,795 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:08:49,796 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:08:49,797 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:08:49,797 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:08:49,803 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:49" (1/1) ... [2023-11-06 23:08:49,842 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:49" (1/1) ... [2023-11-06 23:08:49,875 INFO L138 Inliner]: procedures = 368, calls = 28, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 119 [2023-11-06 23:08:49,877 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:08:49,877 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:08:49,878 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:08:49,878 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:08:49,887 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:49" (1/1) ... [2023-11-06 23:08:49,887 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:49" (1/1) ... [2023-11-06 23:08:49,892 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:49" (1/1) ... [2023-11-06 23:08:49,893 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:49" (1/1) ... [2023-11-06 23:08:49,906 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:49" (1/1) ... [2023-11-06 23:08:49,909 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:49" (1/1) ... [2023-11-06 23:08:49,912 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:49" (1/1) ... [2023-11-06 23:08:49,914 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:49" (1/1) ... [2023-11-06 23:08:49,919 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:08:49,920 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:08:49,920 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:08:49,920 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:08:49,921 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:49" (1/1) ... [2023-11-06 23:08:49,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:08:49,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:50,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:08:50,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:08:50,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:08:50,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 23:08:50,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:08:50,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:08:50,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:08:50,084 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 23:08:50,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:08:50,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:08:50,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 23:08:50,085 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 23:08:50,086 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 23:08:50,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:08:50,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:08:50,088 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 23:08:50,293 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:08:50,296 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:08:50,718 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:08:50,729 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:08:50,732 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 23:08:50,740 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:08:50 BoogieIcfgContainer [2023-11-06 23:08:50,741 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:08:50,744 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:08:50,745 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:08:50,749 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:08:50,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:08:48" (1/3) ... [2023-11-06 23:08:50,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b97fa2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:08:50, skipping insertion in model container [2023-11-06 23:08:50,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:49" (2/3) ... [2023-11-06 23:08:50,752 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b97fa2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:08:50, skipping insertion in model container [2023-11-06 23:08:50,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:08:50" (3/3) ... [2023-11-06 23:08:50,754 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_17-arrayloop_nr.i [2023-11-06 23:08:50,775 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:08:50,775 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-06 23:08:50,775 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:08:50,920 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 23:08:50,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 177 transitions, 358 flow [2023-11-06 23:08:51,041 INFO L124 PetriNetUnfolderBase]: 6/176 cut-off events. [2023-11-06 23:08:51,042 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:08:51,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 176 events. 6/176 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 432 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2023-11-06 23:08:51,049 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 177 transitions, 358 flow [2023-11-06 23:08:51,057 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 176 transitions, 355 flow [2023-11-06 23:08:51,061 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:08:51,072 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 176 transitions, 355 flow [2023-11-06 23:08:51,075 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 176 transitions, 355 flow [2023-11-06 23:08:51,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 176 transitions, 355 flow [2023-11-06 23:08:51,120 INFO L124 PetriNetUnfolderBase]: 6/176 cut-off events. [2023-11-06 23:08:51,120 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:08:51,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 176 events. 6/176 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 430 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2023-11-06 23:08:51,129 INFO L119 LiptonReduction]: Number of co-enabled transitions 7844 [2023-11-06 23:08:59,747 INFO L134 LiptonReduction]: Checked pairs total: 24193 [2023-11-06 23:08:59,747 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-11-06 23:08:59,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:08:59,784 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;@47fb66ef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:08:59,785 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-06 23:08:59,790 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:08:59,790 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 23:08:59,790 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:08:59,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:59,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:08:59,792 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 23:08:59,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:59,798 INFO L85 PathProgramCache]: Analyzing trace with hash 19722, now seen corresponding path program 1 times [2023-11-06 23:08:59,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:59,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269839277] [2023-11-06 23:08:59,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:59,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:00,026 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 23:09:00,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:00,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269839277] [2023-11-06 23:09:00,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269839277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:00,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:00,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:09:00,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255094281] [2023-11-06 23:09:00,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:00,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:00,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:00,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:00,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:00,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 331 [2023-11-06 23:09:00,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 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 23:09:00,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:00,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 331 [2023-11-06 23:09:00,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:00,766 INFO L124 PetriNetUnfolderBase]: 895/2147 cut-off events. [2023-11-06 23:09:00,766 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:09:00,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3949 conditions, 2147 events. 895/2147 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 13685 event pairs, 450 based on Foata normal form. 0/1105 useless extension candidates. Maximal degree in co-relation 3922. Up to 997 conditions per place. [2023-11-06 23:09:00,788 INFO L140 encePairwiseOnDemand]: 319/331 looper letters, 92 selfloop transitions, 4 changer transitions 0/109 dead transitions. [2023-11-06 23:09:00,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 109 transitions, 413 flow [2023-11-06 23:09:00,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:00,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:09:00,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 600 transitions. [2023-11-06 23:09:00,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6042296072507553 [2023-11-06 23:09:00,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 600 transitions. [2023-11-06 23:09:00,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 600 transitions. [2023-11-06 23:09:00,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:00,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 600 transitions. [2023-11-06 23:09:00,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 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 23:09:00,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 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 23:09:00,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 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 23:09:00,831 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 143 flow. Second operand 3 states and 600 transitions. [2023-11-06 23:09:00,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 109 transitions, 413 flow [2023-11-06 23:09:00,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 109 transitions, 412 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:09:00,840 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 162 flow [2023-11-06 23:09:00,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2023-11-06 23:09:00,847 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-11-06 23:09:00,847 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 162 flow [2023-11-06 23:09:00,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 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 23:09:00,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:00,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:09:00,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:09:00,849 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 23:09:00,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:00,850 INFO L85 PathProgramCache]: Analyzing trace with hash 19751, now seen corresponding path program 1 times [2023-11-06 23:09:00,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:00,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368779071] [2023-11-06 23:09:00,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:00,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:01,272 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 23:09:01,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:01,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368779071] [2023-11-06 23:09:01,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368779071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:01,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:01,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:09:01,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559898760] [2023-11-06 23:09:01,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:01,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:01,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:01,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:01,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:01,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 331 [2023-11-06 23:09:01,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 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 23:09:01,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:01,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 331 [2023-11-06 23:09:01,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:01,915 INFO L124 PetriNetUnfolderBase]: 895/2150 cut-off events. [2023-11-06 23:09:01,915 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2023-11-06 23:09:01,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 2150 events. 895/2150 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 13699 event pairs, 828 based on Foata normal form. 0/1128 useless extension candidates. Maximal degree in co-relation 4021. Up to 1795 conditions per place. [2023-11-06 23:09:01,931 INFO L140 encePairwiseOnDemand]: 328/331 looper letters, 54 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-11-06 23:09:01,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 276 flow [2023-11-06 23:09:01,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:09:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-11-06 23:09:01,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367573011077543 [2023-11-06 23:09:01,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-11-06 23:09:01,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-11-06 23:09:01,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:01,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-11-06 23:09:01,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 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 23:09:01,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 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 23:09:01,950 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 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 23:09:01,951 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 162 flow. Second operand 3 states and 533 transitions. [2023-11-06 23:09:01,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 276 flow [2023-11-06 23:09:01,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:09:01,956 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 166 flow [2023-11-06 23:09:01,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2023-11-06 23:09:01,960 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 0 predicate places. [2023-11-06 23:09:01,965 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 166 flow [2023-11-06 23:09:01,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 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 23:09:01,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:01,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:09:01,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:09:01,969 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 23:09:01,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:01,969 INFO L85 PathProgramCache]: Analyzing trace with hash 19752, now seen corresponding path program 1 times [2023-11-06 23:09:01,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:01,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112068118] [2023-11-06 23:09:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:01,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:02,129 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 23:09:02,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:02,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112068118] [2023-11-06 23:09:02,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112068118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:02,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:02,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:09:02,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181715234] [2023-11-06 23:09:02,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:02,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:02,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:02,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:02,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:02,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 331 [2023-11-06 23:09:02,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 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 23:09:02,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:02,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 331 [2023-11-06 23:09:02,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:02,641 INFO L124 PetriNetUnfolderBase]: 779/1899 cut-off events. [2023-11-06 23:09:02,642 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-11-06 23:09:02,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3551 conditions, 1899 events. 779/1899 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 11870 event pairs, 649 based on Foata normal form. 2/1057 useless extension candidates. Maximal degree in co-relation 3537. Up to 1412 conditions per place. [2023-11-06 23:09:02,656 INFO L140 encePairwiseOnDemand]: 325/331 looper letters, 68 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-11-06 23:09:02,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 336 flow [2023-11-06 23:09:02,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:09:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 576 transitions. [2023-11-06 23:09:02,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5800604229607251 [2023-11-06 23:09:02,660 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 576 transitions. [2023-11-06 23:09:02,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 576 transitions. [2023-11-06 23:09:02,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:02,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 576 transitions. [2023-11-06 23:09:02,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 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 23:09:02,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 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 23:09:02,667 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 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 23:09:02,667 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 166 flow. Second operand 3 states and 576 transitions. [2023-11-06 23:09:02,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 336 flow [2023-11-06 23:09:02,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 83 transitions, 332 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 23:09:02,671 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 164 flow [2023-11-06 23:09:02,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2023-11-06 23:09:02,672 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2023-11-06 23:09:02,672 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 164 flow [2023-11-06 23:09:02,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 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 23:09:02,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:02,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:09:02,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:09:02,674 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 23:09:02,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:02,674 INFO L85 PathProgramCache]: Analyzing trace with hash 612843, now seen corresponding path program 1 times [2023-11-06 23:09:02,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:02,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771702259] [2023-11-06 23:09:02,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:02,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:03,039 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 23:09:03,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:03,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771702259] [2023-11-06 23:09:03,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771702259] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:03,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955610825] [2023-11-06 23:09:03,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:03,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:03,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:03,044 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:03,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:09:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:03,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 23:09:03,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:03,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:03,304 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 23:09:03,326 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-06 23:09:03,326 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-06 23:09:03,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:03,385 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 23:09:03,413 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 23:09:03,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:03,560 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:09:03,561 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 23:09:03,715 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 23:09:03,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955610825] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:03,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:03,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-06 23:09:03,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822608438] [2023-11-06 23:09:03,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:03,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:09:03,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:03,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:09:03,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:09:06,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 331 [2023-11-06 23:09:06,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 164 flow. Second operand has 8 states, 8 states have (on average 147.125) internal successors, (1177), 8 states have internal predecessors, (1177), 0 states have call successors, (0), 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 23:09:06,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:06,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 331 [2023-11-06 23:09:06,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:07,408 INFO L124 PetriNetUnfolderBase]: 817/1990 cut-off events. [2023-11-06 23:09:07,408 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-11-06 23:09:07,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3814 conditions, 1990 events. 817/1990 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 12797 event pairs, 37 based on Foata normal form. 3/1127 useless extension candidates. Maximal degree in co-relation 3797. Up to 807 conditions per place. [2023-11-06 23:09:07,423 INFO L140 encePairwiseOnDemand]: 321/331 looper letters, 90 selfloop transitions, 11 changer transitions 0/114 dead transitions. [2023-11-06 23:09:07,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 114 transitions, 490 flow [2023-11-06 23:09:07,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:09:07,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:09:07,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 982 transitions. [2023-11-06 23:09:07,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4944612286002014 [2023-11-06 23:09:07,428 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 982 transitions. [2023-11-06 23:09:07,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 982 transitions. [2023-11-06 23:09:07,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:07,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 982 transitions. [2023-11-06 23:09:07,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.66666666666666) internal successors, (982), 6 states have internal predecessors, (982), 0 states have call successors, (0), 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 23:09:07,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 331.0) internal successors, (2317), 7 states have internal predecessors, (2317), 0 states have call successors, (0), 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 23:09:07,440 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 331.0) internal successors, (2317), 7 states have internal predecessors, (2317), 0 states have call successors, (0), 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 23:09:07,440 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 164 flow. Second operand 6 states and 982 transitions. [2023-11-06 23:09:07,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 114 transitions, 490 flow [2023-11-06 23:09:07,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 114 transitions, 486 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:09:07,445 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 231 flow [2023-11-06 23:09:07,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=231, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2023-11-06 23:09:07,447 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2023-11-06 23:09:07,447 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 231 flow [2023-11-06 23:09:07,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 147.125) internal successors, (1177), 8 states have internal predecessors, (1177), 0 states have call successors, (0), 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 23:09:07,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:07,449 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-11-06 23:09:07,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 23:09:07,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:07,656 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 23:09:07,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:07,656 INFO L85 PathProgramCache]: Analyzing trace with hash 18998666, now seen corresponding path program 1 times [2023-11-06 23:09:07,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:07,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690616381] [2023-11-06 23:09:07,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:07,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:07,739 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 23:09:07,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:07,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690616381] [2023-11-06 23:09:07,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690616381] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:07,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038657631] [2023-11-06 23:09:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:07,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:07,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:07,744 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:07,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:09:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:07,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:09:07,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:07,886 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 23:09:07,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:07,921 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 23:09:07,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038657631] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:07,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:07,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 23:09:07,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154323899] [2023-11-06 23:09:07,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:07,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:09:07,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:07,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:09:07,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:09:08,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 331 [2023-11-06 23:09:08,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 231 flow. Second operand has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 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 23:09:08,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:08,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 331 [2023-11-06 23:09:08,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:09,391 INFO L124 PetriNetUnfolderBase]: 2166/5322 cut-off events. [2023-11-06 23:09:09,392 INFO L125 PetriNetUnfolderBase]: For 627/627 co-relation queries the response was YES. [2023-11-06 23:09:09,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10437 conditions, 5322 events. 2166/5322 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 33028 event pairs, 88 based on Foata normal form. 94/3243 useless extension candidates. Maximal degree in co-relation 10401. Up to 705 conditions per place. [2023-11-06 23:09:09,443 INFO L140 encePairwiseOnDemand]: 321/331 looper letters, 246 selfloop transitions, 16 changer transitions 0/275 dead transitions. [2023-11-06 23:09:09,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 275 transitions, 1234 flow [2023-11-06 23:09:09,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:09:09,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:09:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1575 transitions. [2023-11-06 23:09:09,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5947885196374623 [2023-11-06 23:09:09,449 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1575 transitions. [2023-11-06 23:09:09,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1575 transitions. [2023-11-06 23:09:09,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:09,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1575 transitions. [2023-11-06 23:09:09,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 196.875) internal successors, (1575), 8 states have internal predecessors, (1575), 0 states have call successors, (0), 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 23:09:09,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 331.0) internal successors, (2979), 9 states have internal predecessors, (2979), 0 states have call successors, (0), 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 23:09:09,464 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 331.0) internal successors, (2979), 9 states have internal predecessors, (2979), 0 states have call successors, (0), 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 23:09:09,465 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 231 flow. Second operand 8 states and 1575 transitions. [2023-11-06 23:09:09,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 275 transitions, 1234 flow [2023-11-06 23:09:09,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 275 transitions, 1226 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-06 23:09:09,482 INFO L231 Difference]: Finished difference. Result has 88 places, 76 transitions, 361 flow [2023-11-06 23:09:09,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=361, PETRI_PLACES=88, PETRI_TRANSITIONS=76} [2023-11-06 23:09:09,486 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 17 predicate places. [2023-11-06 23:09:09,487 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 76 transitions, 361 flow [2023-11-06 23:09:09,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 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 23:09:09,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:09,488 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 23:09:09,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:09,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:09,694 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 23:09:09,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:09,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1077894695, now seen corresponding path program 2 times [2023-11-06 23:09:09,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:09,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919663804] [2023-11-06 23:09:09,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:09,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:10,551 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 23:09:10,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:10,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919663804] [2023-11-06 23:09:10,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919663804] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:10,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593235477] [2023-11-06 23:09:10,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:09:10,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:10,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:10,557 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:10,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:09:10,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:09:10,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:10,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 23:09:10,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:10,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:10,784 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 23:09:10,843 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:09:10,844 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 14 treesize of output 13 [2023-11-06 23:09:10,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:10,948 INFO L322 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-06 23:09:10,949 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 26 treesize of output 26 [2023-11-06 23:09:10,963 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:09:10,966 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 23:09:11,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:11,052 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 20 treesize of output 13 [2023-11-06 23:09:11,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:11,104 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 23:09:11,136 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 23:09:11,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:11,238 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:09:11,239 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 23:09:11,485 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:09:11,485 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 23:09:11,799 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:09:11,800 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 90 treesize of output 108 [2023-11-06 23:09:14,301 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:09:14,301 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 105 treesize of output 123 [2023-11-06 23:09:16,637 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~j~0#1| 4))) (let ((.cse2 (+ |c_~#slot~0.offset| .cse0 12))) (and (forall ((v_ArrVal_435 Int)) (or (< 8 v_ArrVal_435) (forall ((|v_ULTIMATE.start_new_#res#1.base_62| Int)) (or (forall ((|v_ULTIMATE.start_new_#res#1.base_59| Int) (|v_ULTIMATE.start_new_#res#1.base_63| Int) (v_prenex_3 Int) (|v_ULTIMATE.start_new_#res#1.base_61| Int) (v_ArrVal_439 Int) (v_ArrVal_438 Int) (v_ArrVal_437 Int) (v_ArrVal_436 Int)) (let ((.cse1 (store (store (store |c_#length| |v_ULTIMATE.start_new_#res#1.base_63| v_ArrVal_435) |v_ULTIMATE.start_new_#res#1.base_62| v_ArrVal_436) |v_ULTIMATE.start_new_#res#1.base_61| v_ArrVal_437))) (or (< (+ 19 |c_~#slot~0.offset| .cse0) (select (store (store .cse1 v_prenex_3 v_ArrVal_438) |v_ULTIMATE.start_new_#res#1.base_59| v_ArrVal_439) |c_~#slot~0.base|)) (= |c_~#slot~0.base| v_prenex_3) (= |v_ULTIMATE.start_new_#res#1.base_59| |c_~#slot~0.base|) (< (select .cse1 |c_~#slot~0.base|) .cse2) (= |v_ULTIMATE.start_new_#res#1.base_61| |c_~#slot~0.base|)))) (= |v_ULTIMATE.start_new_#res#1.base_62| |c_~#slot~0.base|))))) (or (forall ((v_prenex_6 Int) (v_prenex_7 Int) (v_prenex_4 Int) (v_prenex_5 Int) (|v_ULTIMATE.start_new_#res#1.base_63| Int) (v_ArrVal_435 Int)) (or (< 8 v_ArrVal_435) (= |c_~#slot~0.base| v_prenex_4) (= |c_~#slot~0.base| v_prenex_6) (< (select (store (store (store |c_#length| |v_ULTIMATE.start_new_#res#1.base_63| v_ArrVal_435) v_prenex_6 v_prenex_7) v_prenex_4 v_prenex_5) |c_~#slot~0.base|) .cse2))) (< 0 (+ |c_~#slot~0.offset| .cse0 17)))))) is different from false [2023-11-06 23:09:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 4 not checked. [2023-11-06 23:09:16,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593235477] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:16,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:16,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-06 23:09:16,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758715173] [2023-11-06 23:09:16,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:16,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 23:09:16,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:16,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 23:09:16,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=189, Unknown=2, NotChecked=28, Total=272 [2023-11-06 23:09:16,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 331 [2023-11-06 23:09:16,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 76 transitions, 361 flow. Second operand has 17 states, 17 states have (on average 86.05882352941177) internal successors, (1463), 17 states have internal predecessors, (1463), 0 states have call successors, (0), 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 23:09:16,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:16,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 331 [2023-11-06 23:09:16,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:22,548 INFO L124 PetriNetUnfolderBase]: 3902/7823 cut-off events. [2023-11-06 23:09:22,548 INFO L125 PetriNetUnfolderBase]: For 1543/1543 co-relation queries the response was YES. [2023-11-06 23:09:22,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17419 conditions, 7823 events. 3902/7823 cut-off events. For 1543/1543 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 46683 event pairs, 3 based on Foata normal form. 5/3825 useless extension candidates. Maximal degree in co-relation 17385. Up to 4515 conditions per place. [2023-11-06 23:09:22,610 INFO L140 encePairwiseOnDemand]: 324/331 looper letters, 160 selfloop transitions, 21 changer transitions 0/181 dead transitions. [2023-11-06 23:09:22,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 181 transitions, 1070 flow [2023-11-06 23:09:22,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 23:09:22,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 23:09:22,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1115 transitions. [2023-11-06 23:09:22,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3062345509475419 [2023-11-06 23:09:22,620 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1115 transitions. [2023-11-06 23:09:22,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1115 transitions. [2023-11-06 23:09:22,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:22,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1115 transitions. [2023-11-06 23:09:22,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 101.36363636363636) internal successors, (1115), 11 states have internal predecessors, (1115), 0 states have call successors, (0), 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 23:09:22,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 331.0) internal successors, (3972), 12 states have internal predecessors, (3972), 0 states have call successors, (0), 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 23:09:22,633 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 331.0) internal successors, (3972), 12 states have internal predecessors, (3972), 0 states have call successors, (0), 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 23:09:22,633 INFO L175 Difference]: Start difference. First operand has 88 places, 76 transitions, 361 flow. Second operand 11 states and 1115 transitions. [2023-11-06 23:09:22,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 181 transitions, 1070 flow [2023-11-06 23:09:22,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 181 transitions, 1016 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-11-06 23:09:22,657 INFO L231 Difference]: Finished difference. Result has 97 places, 81 transitions, 409 flow [2023-11-06 23:09:22,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=409, PETRI_PLACES=97, PETRI_TRANSITIONS=81} [2023-11-06 23:09:22,658 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 26 predicate places. [2023-11-06 23:09:22,658 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 81 transitions, 409 flow [2023-11-06 23:09:22,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 86.05882352941177) internal successors, (1463), 17 states have internal predecessors, (1463), 0 states have call successors, (0), 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 23:09:22,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:22,659 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1] [2023-11-06 23:09:22,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:22,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:22,865 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 23:09:22,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:22,866 INFO L85 PathProgramCache]: Analyzing trace with hash 769701514, now seen corresponding path program 2 times [2023-11-06 23:09:22,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:22,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609054579] [2023-11-06 23:09:22,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:22,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:23,134 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 23:09:23,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:23,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609054579] [2023-11-06 23:09:23,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609054579] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:23,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953503109] [2023-11-06 23:09:23,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:09:23,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:23,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:23,136 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:23,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:09:23,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:09:23,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:23,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:09:23,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:23,366 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 23:09:23,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:23,453 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 23:09:23,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953503109] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:23,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:23,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2023-11-06 23:09:23,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422071811] [2023-11-06 23:09:23,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:23,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:09:23,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:23,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:09:23,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:09:23,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 331 [2023-11-06 23:09:23,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 81 transitions, 409 flow. Second operand has 12 states, 12 states have (on average 163.08333333333334) internal successors, (1957), 12 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:23,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:23,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 331 [2023-11-06 23:09:23,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:26,008 INFO L124 PetriNetUnfolderBase]: 3534/8709 cut-off events. [2023-11-06 23:09:26,008 INFO L125 PetriNetUnfolderBase]: For 3822/3822 co-relation queries the response was YES. [2023-11-06 23:09:26,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18155 conditions, 8709 events. 3534/8709 cut-off events. For 3822/3822 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 54192 event pairs, 88 based on Foata normal form. 76/5212 useless extension candidates. Maximal degree in co-relation 18076. Up to 705 conditions per place. [2023-11-06 23:09:26,129 INFO L140 encePairwiseOnDemand]: 321/331 looper letters, 389 selfloop transitions, 24 changer transitions 0/426 dead transitions. [2023-11-06 23:09:26,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 426 transitions, 2074 flow [2023-11-06 23:09:26,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:09:26,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 23:09:26,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2373 transitions. [2023-11-06 23:09:26,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5974320241691843 [2023-11-06 23:09:26,147 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2373 transitions. [2023-11-06 23:09:26,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2373 transitions. [2023-11-06 23:09:26,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:26,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2373 transitions. [2023-11-06 23:09:26,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 197.75) internal successors, (2373), 12 states have internal predecessors, (2373), 0 states have call successors, (0), 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 23:09:26,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 331.0) internal successors, (4303), 13 states have internal predecessors, (4303), 0 states have call successors, (0), 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 23:09:26,170 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 331.0) internal successors, (4303), 13 states have internal predecessors, (4303), 0 states have call successors, (0), 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 23:09:26,171 INFO L175 Difference]: Start difference. First operand has 97 places, 81 transitions, 409 flow. Second operand 12 states and 2373 transitions. [2023-11-06 23:09:26,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 426 transitions, 2074 flow [2023-11-06 23:09:26,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 426 transitions, 2004 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-11-06 23:09:26,193 INFO L231 Difference]: Finished difference. Result has 109 places, 85 transitions, 521 flow [2023-11-06 23:09:26,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=521, PETRI_PLACES=109, PETRI_TRANSITIONS=85} [2023-11-06 23:09:26,194 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 38 predicate places. [2023-11-06 23:09:26,194 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 85 transitions, 521 flow [2023-11-06 23:09:26,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.08333333333334) internal successors, (1957), 12 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:26,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:26,196 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 1, 1] [2023-11-06 23:09:26,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:26,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:26,404 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 23:09:26,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:26,404 INFO L85 PathProgramCache]: Analyzing trace with hash -651167765, now seen corresponding path program 3 times [2023-11-06 23:09:26,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:26,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026598895] [2023-11-06 23:09:26,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:26,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:28,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:28,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026598895] [2023-11-06 23:09:28,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026598895] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:28,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38677348] [2023-11-06 23:09:28,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:09:28,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:28,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:28,579 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:28,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:09:44,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 23:09:44,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:44,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-06 23:09:44,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:44,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:44,475 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 23:09:44,538 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:09:44,539 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 14 treesize of output 13 [2023-11-06 23:09:44,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:44,647 INFO L322 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-06 23:09:44,647 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 26 treesize of output 26 [2023-11-06 23:09:44,660 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:09:44,660 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 23:09:44,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:44,740 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 20 treesize of output 13 [2023-11-06 23:09:44,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:44,797 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 23:09:44,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:44,853 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 23:09:44,939 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:09:44,940 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 14 treesize of output 13 [2023-11-06 23:09:45,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:45,115 INFO L322 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-11-06 23:09:45,116 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 24 treesize of output 31 [2023-11-06 23:09:45,135 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:09:45,136 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 23:09:45,302 INFO L322 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2023-11-06 23:09:45,303 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 23 treesize of output 30 [2023-11-06 23:09:45,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:45,559 INFO L322 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2023-11-06 23:09:45,559 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 37 [2023-11-06 23:09:45,590 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:09:45,591 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 23:09:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:45,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:45,862 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 23:09:45,863 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 23:09:46,024 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 23:09:46,025 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 23:09:46,387 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:09:46,388 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 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-06 23:09:48,904 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 23:09:48,905 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 23:09:51,193 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 23:09:51,194 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 23:09:52,494 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 23:09:52,495 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 23:09:56,862 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 23:09:56,863 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 23:09:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:57,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38677348] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:57,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:57,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-06 23:09:57,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42791170] [2023-11-06 23:09:57,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:57,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 23:09:57,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:57,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 23:09:57,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=861, Unknown=4, NotChecked=0, Total=992 [2023-11-06 23:09:59,602 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 23:10:02,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:10:04,850 WARN L539 Checker$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 23:10:07,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:10:09,664 WARN L539 Checker$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 23:10:12,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:10:15,149 WARN L539 Checker$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 23:10:18,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:10:21,217 WARN L539 Checker$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 23:10:23,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:10:25,642 WARN L539 Checker$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 23:10:27,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:10:30,282 WARN L539 Checker$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 23:10:32,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:10:36,555 WARN L539 Checker$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 23:10:39,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:10:42,297 WARN L539 Checker$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 23:10:44,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:10:46,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:10:49,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:10:51,360 WARN L539 Checker$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 23:10:53,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:10:55,890 WARN L539 Checker$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 23:10:58,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:11:01,137 WARN L539 Checker$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 23:11:03,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:11:05,716 WARN L539 Checker$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 23:11:08,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:11:10,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:11:15,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:11:18,505 WARN L539 Checker$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 23:11:20,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:11:23,420 WARN L539 Checker$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 23:11:25,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:11:28,424 WARN L539 Checker$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 23:11:32,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:11:34,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:11:36,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:11:38,745 WARN L539 Checker$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 23:11:38,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 331 [2023-11-06 23:11:38,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 85 transitions, 521 flow. Second operand has 32 states, 32 states have (on average 86.03125) internal successors, (2753), 32 states have internal predecessors, (2753), 0 states have call successors, (0), 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 23:11:38,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:38,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 331 [2023-11-06 23:11:38,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:46,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:11:48,168 WARN L539 Checker$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 23:11:50,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:11:52,363 WARN L539 Checker$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 23:11:54,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:11:56,382 WARN L539 Checker$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 23:12:03,836 INFO L124 PetriNetUnfolderBase]: 6297/12818 cut-off events. [2023-11-06 23:12:03,837 INFO L125 PetriNetUnfolderBase]: For 3522/3522 co-relation queries the response was YES. [2023-11-06 23:12:03,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28631 conditions, 12818 events. 6297/12818 cut-off events. For 3522/3522 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 77260 event pairs, 1998 based on Foata normal form. 1/6162 useless extension candidates. Maximal degree in co-relation 28554. Up to 7480 conditions per place. [2023-11-06 23:12:03,927 INFO L140 encePairwiseOnDemand]: 323/331 looper letters, 145 selfloop transitions, 26 changer transitions 0/171 dead transitions. [2023-11-06 23:12:03,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 171 transitions, 1021 flow [2023-11-06 23:12:03,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:12:03,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 23:12:03,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1521 transitions. [2023-11-06 23:12:03,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2871978851963746 [2023-11-06 23:12:03,936 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1521 transitions. [2023-11-06 23:12:03,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1521 transitions. [2023-11-06 23:12:03,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:12:03,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1521 transitions. [2023-11-06 23:12:03,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 95.0625) internal successors, (1521), 16 states have internal predecessors, (1521), 0 states have call successors, (0), 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 23:12:03,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 331.0) internal successors, (5627), 17 states have internal predecessors, (5627), 0 states have call successors, (0), 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 23:12:03,955 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 331.0) internal successors, (5627), 17 states have internal predecessors, (5627), 0 states have call successors, (0), 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 23:12:03,955 INFO L175 Difference]: Start difference. First operand has 109 places, 85 transitions, 521 flow. Second operand 16 states and 1521 transitions. [2023-11-06 23:12:03,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 171 transitions, 1021 flow [2023-11-06 23:12:03,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 171 transitions, 973 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-11-06 23:12:04,049 INFO L231 Difference]: Finished difference. Result has 117 places, 85 transitions, 515 flow [2023-11-06 23:12:04,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=515, PETRI_PLACES=117, PETRI_TRANSITIONS=85} [2023-11-06 23:12:04,050 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 46 predicate places. [2023-11-06 23:12:04,050 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 85 transitions, 515 flow [2023-11-06 23:12:04,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 86.03125) internal successors, (2753), 32 states have internal predecessors, (2753), 0 states have call successors, (0), 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 23:12:04,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:12:04,052 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-11-06 23:12:04,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:04,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:04,264 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 23:12:04,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:04,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1288636327, now seen corresponding path program 4 times [2023-11-06 23:12:04,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:04,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800315757] [2023-11-06 23:12:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:04,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:12:04,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:04,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800315757] [2023-11-06 23:12:04,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800315757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:12:04,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:12:04,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-06 23:12:04,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266968327] [2023-11-06 23:12:04,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:04,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 23:12:04,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:04,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 23:12:04,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:12:04,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 331 [2023-11-06 23:12:04,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 85 transitions, 515 flow. Second operand has 13 states, 13 states have (on average 162.92307692307693) internal successors, (2118), 13 states have internal predecessors, (2118), 0 states have call successors, (0), 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 23:12:04,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:12:04,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 331 [2023-11-06 23:12:04,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:12:07,502 INFO L124 PetriNetUnfolderBase]: 3514/8898 cut-off events. [2023-11-06 23:12:07,502 INFO L125 PetriNetUnfolderBase]: For 5305/5305 co-relation queries the response was YES. [2023-11-06 23:12:07,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19001 conditions, 8898 events. 3514/8898 cut-off events. For 5305/5305 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 56838 event pairs, 70 based on Foata normal form. 20/5245 useless extension candidates. Maximal degree in co-relation 18878. Up to 702 conditions per place. [2023-11-06 23:12:07,547 INFO L140 encePairwiseOnDemand]: 324/331 looper letters, 414 selfloop transitions, 23 changer transitions 1/451 dead transitions. [2023-11-06 23:12:07,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 451 transitions, 2282 flow [2023-11-06 23:12:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:12:07,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:12:07,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2537 transitions. [2023-11-06 23:12:07,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5895886590750639 [2023-11-06 23:12:07,562 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2537 transitions. [2023-11-06 23:12:07,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2537 transitions. [2023-11-06 23:12:07,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:12:07,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2537 transitions. [2023-11-06 23:12:07,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 195.15384615384616) internal successors, (2537), 13 states have internal predecessors, (2537), 0 states have call successors, (0), 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 23:12:07,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 331.0) internal successors, (4634), 14 states have internal predecessors, (4634), 0 states have call successors, (0), 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 23:12:07,585 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 331.0) internal successors, (4634), 14 states have internal predecessors, (4634), 0 states have call successors, (0), 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 23:12:07,585 INFO L175 Difference]: Start difference. First operand has 117 places, 85 transitions, 515 flow. Second operand 13 states and 2537 transitions. [2023-11-06 23:12:07,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 451 transitions, 2282 flow [2023-11-06 23:12:07,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 451 transitions, 2100 flow, removed 7 selfloop flow, removed 14 redundant places. [2023-11-06 23:12:07,606 INFO L231 Difference]: Finished difference. Result has 114 places, 82 transitions, 426 flow [2023-11-06 23:12:07,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=426, PETRI_PLACES=114, PETRI_TRANSITIONS=82} [2023-11-06 23:12:07,607 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 43 predicate places. [2023-11-06 23:12:07,608 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 82 transitions, 426 flow [2023-11-06 23:12:07,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 162.92307692307693) internal successors, (2118), 13 states have internal predecessors, (2118), 0 states have call successors, (0), 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 23:12:07,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:12:07,609 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-11-06 23:12:07,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 23:12:07,610 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 23:12:07,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:07,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1288636299, now seen corresponding path program 1 times [2023-11-06 23:12:07,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:07,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112642561] [2023-11-06 23:12:07,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:07,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-06 23:12:08,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:08,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112642561] [2023-11-06 23:12:08,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112642561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:08,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819887135] [2023-11-06 23:12:08,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:08,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:08,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:08,873 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:08,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:12:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 23:12:09,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:09,242 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 6 treesize of output 5 [2023-11-06 23:12:09,271 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 23:12:09,274 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-06 23:12:09,335 INFO L322 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2023-11-06 23:12:09,335 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 4 case distinctions, treesize of input 24 treesize of output 28 [2023-11-06 23:12:09,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:12:09,375 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:12:09,375 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 19 treesize of output 21 [2023-11-06 23:12:09,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:12:09,408 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 23:12:09,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:12:09,417 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 23:12:09,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:12:09,432 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 23:12:09,458 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-06 23:12:09,458 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 14 [2023-11-06 23:12:09,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:12:09,482 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 23:12:09,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:12:09,499 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 23:12:09,514 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-06 23:12:09,514 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 14 [2023-11-06 23:12:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-06 23:12:09,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:11,608 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_new_#res#1.base_85| Int) (|v_ULTIMATE.start_new_#res#1.base_87| Int) (v_ArrVal_1800 Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_#res#1.base_85| 1)) (= (select (store (store |c_#valid| |v_ULTIMATE.start_new_#res#1.base_87| 1) |v_ULTIMATE.start_new_#res#1.base_85| v_ArrVal_1800) |c_ULTIMATE.start_main_~#t1~0#1.base|) 1))) is different from false [2023-11-06 23:12:13,626 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_new_#res#1.base_85| Int) (|v_ULTIMATE.start_new_#res#1.base_87| Int) (|v_ULTIMATE.start_new_#res#1.base_88| Int) (v_ArrVal_1797 Int) (v_ArrVal_1800 Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_#res#1.base_88| 1)) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_#res#1.base_85| 1)) (= (select (store (store (store |c_#valid| |v_ULTIMATE.start_new_#res#1.base_88| v_ArrVal_1797) |v_ULTIMATE.start_new_#res#1.base_87| 1) |v_ULTIMATE.start_new_#res#1.base_85| v_ArrVal_1800) |c_ULTIMATE.start_main_~#t1~0#1.base|) 1))) is different from false [2023-11-06 23:12:15,652 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_new_#res#1.base_89| Int) (|v_ULTIMATE.start_new_#res#1.base_85| Int) (|v_ULTIMATE.start_new_#res#1.base_87| Int) (|v_ULTIMATE.start_new_#res#1.base_88| Int) (v_ArrVal_1796 Int) (v_ArrVal_1797 Int) (v_ArrVal_1800 Int)) (or (= (select (store (store (store (store |c_#valid| |v_ULTIMATE.start_new_#res#1.base_89| v_ArrVal_1796) |v_ULTIMATE.start_new_#res#1.base_88| v_ArrVal_1797) |v_ULTIMATE.start_new_#res#1.base_87| 1) |v_ULTIMATE.start_new_#res#1.base_85| v_ArrVal_1800) |c_ULTIMATE.start_main_~#t1~0#1.base|) 1) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_#res#1.base_88| 1)) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_#res#1.base_85| 1)) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_#res#1.base_89| 1)))) is different from false [2023-11-06 23:12:17,689 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_new_#res#1.base_89| Int) (|v_ULTIMATE.start_new_#res#1.base_85| Int) (|v_ULTIMATE.start_new_#res#1.base_87| Int) (|v_ULTIMATE.start_new_#res#1.base_88| Int) (v_ArrVal_1796 Int) (v_ArrVal_1795 Int) (v_ArrVal_1797 Int) (v_ArrVal_1800 Int) (|v_ULTIMATE.start_new_#res#1.base_90| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_#res#1.base_90| 1)) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_#res#1.base_88| 1)) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_#res#1.base_85| 1)) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_#res#1.base_89| 1)) (= (select (store (store (store (store (store |c_#valid| |v_ULTIMATE.start_new_#res#1.base_90| v_ArrVal_1795) |v_ULTIMATE.start_new_#res#1.base_89| v_ArrVal_1796) |v_ULTIMATE.start_new_#res#1.base_88| v_ArrVal_1797) |v_ULTIMATE.start_new_#res#1.base_87| 1) |v_ULTIMATE.start_new_#res#1.base_85| v_ArrVal_1800) |c_ULTIMATE.start_main_~#t1~0#1.base|) 1))) is different from false [2023-11-06 23:12:19,729 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_new_#res#1.base_89| Int) (|v_ULTIMATE.start_new_#res#1.base_85| Int) (v_ArrVal_1794 Int) (|v_ULTIMATE.start_new_#res#1.base_87| Int) (|v_ULTIMATE.start_new_#res#1.base_88| Int) (v_ArrVal_1796 Int) (v_ArrVal_1795 Int) (v_ArrVal_1797 Int) (v_ArrVal_1800 Int) (|v_ULTIMATE.start_new_#res#1.base_90| Int) (|v_ULTIMATE.start_new_#res#1.base_91| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_#res#1.base_90| 1)) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_#res#1.base_91| 1)) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_#res#1.base_88| 1)) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_#res#1.base_85| 1)) (= (select (store (store (store (store (store (store |c_#valid| |v_ULTIMATE.start_new_#res#1.base_91| v_ArrVal_1794) |v_ULTIMATE.start_new_#res#1.base_90| v_ArrVal_1795) |v_ULTIMATE.start_new_#res#1.base_89| v_ArrVal_1796) |v_ULTIMATE.start_new_#res#1.base_88| v_ArrVal_1797) |v_ULTIMATE.start_new_#res#1.base_87| 1) |v_ULTIMATE.start_new_#res#1.base_85| v_ArrVal_1800) |c_ULTIMATE.start_main_~#t1~0#1.base|) 1) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_#res#1.base_89| 1)))) is different from false [2023-11-06 23:12:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 8 refuted. 1 times theorem prover too weak. 2 trivial. 40 not checked. [2023-11-06 23:12:21,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819887135] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:21,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:21,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 9] total 11 [2023-11-06 23:12:21,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354927599] [2023-11-06 23:12:21,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:21,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 23:12:21,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:21,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 23:12:21,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=35, Unknown=6, NotChecked=80, Total=156 [2023-11-06 23:12:21,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 331 [2023-11-06 23:12:21,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 82 transitions, 426 flow. Second operand has 13 states, 13 states have (on average 119.38461538461539) internal successors, (1552), 13 states have internal predecessors, (1552), 0 states have call successors, (0), 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 23:12:21,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:12:21,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 331 [2023-11-06 23:12:21,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:12:23,779 INFO L124 PetriNetUnfolderBase]: 4904/10855 cut-off events. [2023-11-06 23:12:23,779 INFO L125 PetriNetUnfolderBase]: For 2280/2280 co-relation queries the response was YES. [2023-11-06 23:12:23,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23092 conditions, 10855 events. 4904/10855 cut-off events. For 2280/2280 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 68313 event pairs, 4572 based on Foata normal form. 0/6073 useless extension candidates. Maximal degree in co-relation 22993. Up to 9864 conditions per place. [2023-11-06 23:12:23,932 INFO L140 encePairwiseOnDemand]: 328/331 looper letters, 93 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2023-11-06 23:12:23,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 101 transitions, 636 flow [2023-11-06 23:12:23,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:12:23,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:12:23,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 430 transitions. [2023-11-06 23:12:23,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43303121852970794 [2023-11-06 23:12:23,935 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 430 transitions. [2023-11-06 23:12:23,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 430 transitions. [2023-11-06 23:12:23,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:12:23,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 430 transitions. [2023-11-06 23:12:23,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 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 23:12:23,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 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 23:12:23,940 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 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 23:12:23,940 INFO L175 Difference]: Start difference. First operand has 114 places, 82 transitions, 426 flow. Second operand 3 states and 430 transitions. [2023-11-06 23:12:23,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 101 transitions, 636 flow [2023-11-06 23:12:23,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 101 transitions, 590 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-06 23:12:23,951 INFO L231 Difference]: Finished difference. Result has 103 places, 81 transitions, 362 flow [2023-11-06 23:12:23,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=331, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=362, PETRI_PLACES=103, PETRI_TRANSITIONS=81} [2023-11-06 23:12:23,952 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 32 predicate places. [2023-11-06 23:12:23,953 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 81 transitions, 362 flow [2023-11-06 23:12:23,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 119.38461538461539) internal successors, (1552), 13 states have internal predecessors, (1552), 0 states have call successors, (0), 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 23:12:23,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:12:23,954 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-11-06 23:12:23,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:24,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:24,161 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-06 23:12:24,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:24,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1288636298, now seen corresponding path program 3 times [2023-11-06 23:12:24,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:24,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216888447] [2023-11-06 23:12:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:24,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:12:25,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:25,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216888447] [2023-11-06 23:12:25,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216888447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:25,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694669835] [2023-11-06 23:12:25,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:12:25,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:25,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:25,372 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:25,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_787abad8-8256-418c-9453-a5e62a90ee94/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process