./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 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_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4a3fff277216174585e9d802eee36c2b619da26d56e48ed5261f2ab62942b7a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:00:56,623 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:00:56,694 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-12 01:00:56,700 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:00:56,701 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:00:56,728 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:00:56,729 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:00:56,730 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:00:56,731 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:00:56,731 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:00:56,732 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:00:56,733 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:00:56,733 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:00:56,734 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:00:56,734 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:00:56,735 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:00:56,736 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:00:56,736 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:00:56,737 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:00:56,738 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:00:56,738 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:00:56,742 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:00:56,742 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 01:00:56,743 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 01:00:56,744 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:00:56,744 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:00:56,745 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:00:56,746 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:00:56,747 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:00:56,747 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 01:00:56,748 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 01:00:56,749 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 01:00:56,749 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:00:56,749 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 01:00:56,749 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 01:00:56,750 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:00:56,750 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:00:56,750 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:00:56,750 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:00:56,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:00:56,751 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:00:56,752 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:00:56,752 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:00:56,753 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:00:56,753 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:00:56,754 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:00:56,754 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4a3fff277216174585e9d802eee36c2b619da26d56e48ed5261f2ab62942b7a [2023-11-12 01:00:57,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:00:57,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:00:57,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:00:57,085 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:00:57,085 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:00:57,087 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i [2023-11-12 01:01:00,235 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:01:00,594 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:01:00,596 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i [2023-11-12 01:01:00,626 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/data/d871198c1/d5ec3448f2354c829d15c7ae6024cf47/FLAGd2982d949 [2023-11-12 01:01:00,654 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/data/d871198c1/d5ec3448f2354c829d15c7ae6024cf47 [2023-11-12 01:01:00,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:01:00,662 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:01:00,663 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:01:00,663 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:01:00,671 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:01:00,671 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:01:00" (1/1) ... [2023-11-12 01:01:00,673 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c48ba52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:00, skipping insertion in model container [2023-11-12 01:01:00,673 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:01:00" (1/1) ... [2023-11-12 01:01:00,750 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:01:01,380 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:01:01,398 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:01:01,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:01:01,578 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:01:01,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:01 WrapperNode [2023-11-12 01:01:01,578 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:01:01,580 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:01:01,580 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:01:01,580 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:01:01,589 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:01" (1/1) ... [2023-11-12 01:01:01,613 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:01" (1/1) ... [2023-11-12 01:01:01,647 INFO L138 Inliner]: procedures = 370, calls = 29, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 125 [2023-11-12 01:01:01,648 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:01:01,649 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:01:01,649 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:01:01,649 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:01:01,661 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:01" (1/1) ... [2023-11-12 01:01:01,661 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:01" (1/1) ... [2023-11-12 01:01:01,668 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:01" (1/1) ... [2023-11-12 01:01:01,668 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:01" (1/1) ... [2023-11-12 01:01:01,693 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:01" (1/1) ... [2023-11-12 01:01:01,710 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:01" (1/1) ... [2023-11-12 01:01:01,716 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:01" (1/1) ... [2023-11-12 01:01:01,718 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:01" (1/1) ... [2023-11-12 01:01:01,723 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:01:01,726 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:01:01,727 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:01:01,727 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:01:01,728 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:01" (1/1) ... [2023-11-12 01:01:01,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:01:01,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:01,761 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:01:01,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:01:01,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 01:01:01,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 01:01:01,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 01:01:01,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 01:01:01,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 01:01:01,795 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 01:01:01,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 01:01:01,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:01:01,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 01:01:01,796 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-12 01:01:01,796 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-12 01:01:01,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:01:01,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:01:01,798 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 01:01:01,965 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:01:01,967 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:01:02,445 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:01:02,455 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:01:02,455 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 01:01:02,458 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:01:02 BoogieIcfgContainer [2023-11-12 01:01:02,458 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:01:02,461 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:01:02,461 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:01:02,465 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:01:02,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:01:00" (1/3) ... [2023-11-12 01:01:02,466 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673e25cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:01:02, skipping insertion in model container [2023-11-12 01:01:02,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:01" (2/3) ... [2023-11-12 01:01:02,467 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673e25cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:01:02, skipping insertion in model container [2023-11-12 01:01:02,467 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:01:02" (3/3) ... [2023-11-12 01:01:02,468 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_19-nested_nr.i [2023-11-12 01:01:02,488 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:01:02,489 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-12 01:01:02,489 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 01:01:02,650 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 01:01:02,704 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 01:01:02,726 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 192 transitions, 388 flow [2023-11-12 01:01:02,736 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 192 transitions, 388 flow [2023-11-12 01:01:02,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 192 transitions, 388 flow [2023-11-12 01:01:02,869 INFO L124 PetriNetUnfolderBase]: 6/191 cut-off events. [2023-11-12 01:01:02,872 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 01:01:02,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 191 events. 6/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 411 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-11-12 01:01:02,883 INFO L119 LiptonReduction]: Number of co-enabled transitions 3192 [2023-11-12 01:01:30,824 INFO L134 LiptonReduction]: Checked pairs total: 10700 [2023-11-12 01:01:30,824 INFO L136 LiptonReduction]: Total number of compositions: 240 [2023-11-12 01:01:30,833 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 64 places, 62 transitions, 128 flow [2023-11-12 01:01:30,874 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 350 states, 227 states have (on average 2.8237885462555066) internal successors, (641), 349 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:30,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:01:30,899 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=FINITE_AUTOMATA, 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;@72533f9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:01:30,899 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-12 01:01:30,903 INFO L276 IsEmpty]: Start isEmpty. Operand has 350 states, 227 states have (on average 2.8237885462555066) internal successors, (641), 349 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:30,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-12 01:01:30,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:30,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-12 01:01:30,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-12 01:01:30,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:30,915 INFO L85 PathProgramCache]: Analyzing trace with hash 696127, now seen corresponding path program 1 times [2023-11-12 01:01:30,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:30,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764164764] [2023-11-12 01:01:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:30,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:31,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:31,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764164764] [2023-11-12 01:01:31,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764164764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:31,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:31,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:01:31,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169275143] [2023-11-12 01:01:31,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:31,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:31,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:31,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:31,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:31,232 INFO L87 Difference]: Start difference. First operand has 350 states, 227 states have (on average 2.8237885462555066) internal successors, (641), 349 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:31,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:31,453 INFO L93 Difference]: Finished difference Result 305 states and 568 transitions. [2023-11-12 01:01:31,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:31,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-12 01:01:31,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:31,482 INFO L225 Difference]: With dead ends: 305 [2023-11-12 01:01:31,482 INFO L226 Difference]: Without dead ends: 305 [2023-11-12 01:01:31,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:31,492 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:31,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:01:31,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-11-12 01:01:31,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2023-11-12 01:01:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 214 states have (on average 2.6542056074766354) internal successors, (568), 304 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 568 transitions. [2023-11-12 01:01:31,584 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 568 transitions. Word has length 3 [2023-11-12 01:01:31,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:31,584 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 568 transitions. [2023-11-12 01:01:31,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:31,585 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 568 transitions. [2023-11-12 01:01:31,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 01:01:31,586 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:31,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 01:01:31,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:01:31,586 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-12 01:01:31,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:31,587 INFO L85 PathProgramCache]: Analyzing trace with hash 21509392, now seen corresponding path program 1 times [2023-11-12 01:01:31,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:31,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734977332] [2023-11-12 01:01:31,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:31,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:31,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:31,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734977332] [2023-11-12 01:01:31,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734977332] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:31,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577909888] [2023-11-12 01:01:31,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:31,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:31,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:31,686 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:31,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:01:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:31,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 01:01:31,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 01:01:31,818 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:01:31,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577909888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:31,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:01:31,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-11-12 01:01:31,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932141340] [2023-11-12 01:01:31,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:31,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:31,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:31,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:31,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:01:31,821 INFO L87 Difference]: Start difference. First operand 305 states and 568 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:32,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:32,007 INFO L93 Difference]: Finished difference Result 308 states and 571 transitions. [2023-11-12 01:01:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:32,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 01:01:32,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:32,011 INFO L225 Difference]: With dead ends: 308 [2023-11-12 01:01:32,011 INFO L226 Difference]: Without dead ends: 308 [2023-11-12 01:01:32,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:01:32,013 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:32,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 16 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:01:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-11-12 01:01:32,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 306. [2023-11-12 01:01:32,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 215 states have (on average 2.655813953488372) internal successors, (571), 305 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:32,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 571 transitions. [2023-11-12 01:01:32,029 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 571 transitions. Word has length 4 [2023-11-12 01:01:32,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:32,030 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 571 transitions. [2023-11-12 01:01:32,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:32,030 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 571 transitions. [2023-11-12 01:01:32,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 01:01:32,031 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:32,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 01:01:32,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:32,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 01:01:32,244 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-12 01:01:32,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:32,245 INFO L85 PathProgramCache]: Analyzing trace with hash 21509443, now seen corresponding path program 1 times [2023-11-12 01:01:32,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:32,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045082425] [2023-11-12 01:01:32,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:32,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:32,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:32,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045082425] [2023-11-12 01:01:32,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045082425] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:32,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769418096] [2023-11-12 01:01:32,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:32,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:32,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:32,352 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:32,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:01:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:32,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 01:01:32,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:32,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:32,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769418096] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:01:32,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [593558987] [2023-11-12 01:01:32,547 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 01:01:32,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:01:32,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 01:01:32,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59719169] [2023-11-12 01:01:32,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:01:32,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:01:32,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:32,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:01:32,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:01:32,552 INFO L87 Difference]: Start difference. First operand 306 states and 571 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:32,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:32,834 INFO L93 Difference]: Finished difference Result 309 states and 574 transitions. [2023-11-12 01:01:32,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:01:32,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 01:01:32,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:32,837 INFO L225 Difference]: With dead ends: 309 [2023-11-12 01:01:32,837 INFO L226 Difference]: Without dead ends: 309 [2023-11-12 01:01:32,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:01:32,839 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:32,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:01:32,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-11-12 01:01:32,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2023-11-12 01:01:32,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 218 states have (on average 2.63302752293578) internal successors, (574), 308 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:32,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 574 transitions. [2023-11-12 01:01:32,854 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 574 transitions. Word has length 4 [2023-11-12 01:01:32,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:32,854 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 574 transitions. [2023-11-12 01:01:32,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:32,854 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 574 transitions. [2023-11-12 01:01:32,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 01:01:32,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:32,855 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1] [2023-11-12 01:01:32,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 01:01:33,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:33,061 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-12 01:01:33,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:33,061 INFO L85 PathProgramCache]: Analyzing trace with hash 768365993, now seen corresponding path program 2 times [2023-11-12 01:01:33,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:33,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514182126] [2023-11-12 01:01:33,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:33,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:33,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:33,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514182126] [2023-11-12 01:01:33,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514182126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:33,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034101544] [2023-11-12 01:01:33,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:01:33,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:33,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:33,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:33,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:01:33,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-12 01:01:33,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:01:33,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-12 01:01:33,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:33,512 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-12 01:01:33,513 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 [2023-11-12 01:01:33,523 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 [2023-11-12 01:01:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 01:01:33,544 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:01:33,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034101544] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:33,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:01:33,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-11-12 01:01:33,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621452204] [2023-11-12 01:01:33,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:33,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:01:33,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:33,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:01:33,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:01:33,546 INFO L87 Difference]: Start difference. First operand 309 states and 574 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:33,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:33,768 INFO L93 Difference]: Finished difference Result 278 states and 512 transitions. [2023-11-12 01:01:33,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:01:33,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 01:01:33,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:33,771 INFO L225 Difference]: With dead ends: 278 [2023-11-12 01:01:33,771 INFO L226 Difference]: Without dead ends: 278 [2023-11-12 01:01:33,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:01:33,772 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:33,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 2 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:01:33,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2023-11-12 01:01:33,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2023-11-12 01:01:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 199 states have (on average 2.5728643216080402) internal successors, (512), 277 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:33,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 512 transitions. [2023-11-12 01:01:33,786 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 512 transitions. Word has length 7 [2023-11-12 01:01:33,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:33,786 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 512 transitions. [2023-11-12 01:01:33,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:33,787 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 512 transitions. [2023-11-12 01:01:33,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 01:01:33,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:33,788 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2023-11-12 01:01:33,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:33,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:33,993 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-12 01:01:33,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:33,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1950456618, now seen corresponding path program 1 times [2023-11-12 01:01:33,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:33,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501077298] [2023-11-12 01:01:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:33,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 01:01:34,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:34,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501077298] [2023-11-12 01:01:34,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501077298] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:34,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403611555] [2023-11-12 01:01:34,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:34,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:34,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:34,128 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:34,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:01:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:34,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 01:01:34,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 01:01:34,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 01:01:34,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403611555] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:01:34,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [808578279] [2023-11-12 01:01:34,403 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 01:01:34,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:01:34,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 14 [2023-11-12 01:01:34,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694088212] [2023-11-12 01:01:34,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:01:34,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 01:01:34,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:34,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 01:01:34,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-12 01:01:34,409 INFO L87 Difference]: Start difference. First operand 278 states and 512 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:34,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:34,680 INFO L93 Difference]: Finished difference Result 286 states and 520 transitions. [2023-11-12 01:01:34,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 01:01:34,680 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 01:01:34,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:34,683 INFO L225 Difference]: With dead ends: 286 [2023-11-12 01:01:34,683 INFO L226 Difference]: Without dead ends: 286 [2023-11-12 01:01:34,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-12 01:01:34,685 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:34,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:01:34,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-11-12 01:01:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2023-11-12 01:01:34,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 206 states have (on average 2.5242718446601944) internal successors, (520), 284 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:34,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 520 transitions. [2023-11-12 01:01:34,695 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 520 transitions. Word has length 8 [2023-11-12 01:01:34,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:34,695 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 520 transitions. [2023-11-12 01:01:34,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:34,699 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 520 transitions. [2023-11-12 01:01:34,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 01:01:34,700 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:34,700 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2023-11-12 01:01:34,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:34,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:34,906 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-12 01:01:34,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:34,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1625316535, now seen corresponding path program 1 times [2023-11-12 01:01:34,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:34,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637395902] [2023-11-12 01:01:34,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:34,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-12 01:01:35,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:35,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637395902] [2023-11-12 01:01:35,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637395902] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:35,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264106748] [2023-11-12 01:01:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:35,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:35,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:35,735 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:35,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 01:01:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:35,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-12 01:01:35,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:36,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:01:36,142 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 [2023-11-12 01:01:36,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:01:36,151 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 [2023-11-12 01:01:36,253 INFO L322 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-12 01:01:36,253 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 23 treesize of output 16 [2023-11-12 01:01:36,260 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 [2023-11-12 01:01:36,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:01:36,295 INFO L322 Elim1Store]: treesize reduction 55, result has 1.8 percent of original size [2023-11-12 01:01:36,296 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 3 case distinctions, treesize of input 49 treesize of output 1 [2023-11-12 01:01:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-12 01:01:36,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:39,081 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_#StackHeapBarrier| 1))) (and (or (forall ((|v_ULTIMATE.start_new_#res#1.base_154| Int) (|v_ULTIMATE.start_new_#res#1.base_153| Int) (|v_ULTIMATE.start_new_~p~0#1.base_301| Int) (v_ArrVal_405 Int) (v_ArrVal_404 Int) (|v_ULTIMATE.start_main_~#t1~0#1.base_153| Int) (v_ArrVal_402 Int)) (let ((.cse2 (store |c_#valid| |v_ULTIMATE.start_main_~#t1~0#1.base_153| v_ArrVal_402))) (let ((.cse0 (store .cse2 |v_ULTIMATE.start_new_~p~0#1.base_301| v_ArrVal_405))) (or (= |v_ULTIMATE.start_new_#res#1.base_153| 0) (not (= (select (store .cse0 |v_ULTIMATE.start_new_#res#1.base_154| v_ArrVal_404) |v_ULTIMATE.start_new_#res#1.base_153|) 0)) (< |v_ULTIMATE.start_main_~#t1~0#1.base_153| .cse1) (not (= (select .cse2 |v_ULTIMATE.start_new_~p~0#1.base_301|) 0)) (not (= (select .cse0 |v_ULTIMATE.start_new_#res#1.base_154|) 0)) (not (= (select .cse0 |c_~#c~0.base|) 1)) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_~p~0#1.base_301| 1)))))) (< 0 (+ 5 |c_~#c~0.offset|))) (forall ((|v_ULTIMATE.start_main_~#t1~0#1.base_153| Int)) (or (< |v_ULTIMATE.start_main_~#t1~0#1.base_153| .cse1) (forall ((v_ArrVal_401 Int) (|v_ULTIMATE.start_new_~p~0#1.base_301| Int) (v_ArrVal_402 Int)) (let ((.cse3 (store |c_#valid| |v_ULTIMATE.start_main_~#t1~0#1.base_153| v_ArrVal_402))) (or (not (= (select .cse3 |v_ULTIMATE.start_new_~p~0#1.base_301|) 0)) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_~p~0#1.base_301| 1)) (forall ((v_ArrVal_405 Int)) (let ((.cse4 (store .cse3 |v_ULTIMATE.start_new_~p~0#1.base_301| v_ArrVal_405))) (or (forall ((|v_ULTIMATE.start_new_#res#1.base_154| Int)) (or (not (= (select .cse4 |v_ULTIMATE.start_new_#res#1.base_154|) 0)) (forall ((|v_ULTIMATE.start_new_#res#1.base_153| Int) (v_ArrVal_406 Int) (v_ArrVal_404 Int) (v_ArrVal_403 Int)) (or (= |v_ULTIMATE.start_new_#res#1.base_153| 0) (not (= (select (store .cse4 |v_ULTIMATE.start_new_#res#1.base_154| v_ArrVal_404) |v_ULTIMATE.start_new_#res#1.base_153|) 0)) (forall ((v_ArrVal_407 Int)) (<= (+ |c_~#c~0.offset| 8) (select (store (store (store (store |c_#length| |v_ULTIMATE.start_main_~#t1~0#1.base_153| v_ArrVal_401) |v_ULTIMATE.start_new_~p~0#1.base_301| v_ArrVal_406) |v_ULTIMATE.start_new_#res#1.base_154| v_ArrVal_403) |v_ULTIMATE.start_new_#res#1.base_153| v_ArrVal_407) |c_~#c~0.base|))))))) (not (= (select .cse4 |c_~#c~0.base|) 1)))))))))))) is different from false [2023-11-12 01:01:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-12 01:01:40,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264106748] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:01:40,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [331725301] [2023-11-12 01:01:40,462 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 01:01:40,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:01:40,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-11-12 01:01:40,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429548372] [2023-11-12 01:01:40,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:01:40,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 01:01:40,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:40,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 01:01:40,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=65, Unknown=1, NotChecked=16, Total=110 [2023-11-12 01:01:40,466 INFO L87 Difference]: Start difference. First operand 285 states and 520 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:41,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:41,380 INFO L93 Difference]: Finished difference Result 284 states and 518 transitions. [2023-11-12 01:01:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:01:41,380 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-12 01:01:41,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:41,382 INFO L225 Difference]: With dead ends: 284 [2023-11-12 01:01:41,382 INFO L226 Difference]: Without dead ends: 284 [2023-11-12 01:01:41,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=52, Invalid=107, Unknown=1, NotChecked=22, Total=182 [2023-11-12 01:01:41,384 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 60 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:41,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 4 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 218 Invalid, 0 Unknown, 58 Unchecked, 0.7s Time] [2023-11-12 01:01:41,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-11-12 01:01:41,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2023-11-12 01:01:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 206 states have (on average 2.5145631067961167) internal successors, (518), 283 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:41,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 518 transitions. [2023-11-12 01:01:41,394 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 518 transitions. Word has length 14 [2023-11-12 01:01:41,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:41,394 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 518 transitions. [2023-11-12 01:01:41,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:41,395 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 518 transitions. [2023-11-12 01:01:41,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 01:01:41,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:41,395 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1] [2023-11-12 01:01:41,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:41,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 01:01:41,606 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-12 01:01:41,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:41,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1154796342, now seen corresponding path program 2 times [2023-11-12 01:01:41,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:41,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312197128] [2023-11-12 01:01:41,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:41,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-12 01:01:41,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:41,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312197128] [2023-11-12 01:01:41,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312197128] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:41,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585438388] [2023-11-12 01:01:41,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:01:41,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:41,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:41,811 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:41,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 01:01:42,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 01:01:42,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:01:42,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 01:01:42,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-12 01:01:42,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-12 01:01:42,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585438388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:01:42,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1763411063] [2023-11-12 01:01:42,062 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 01:01:42,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:01:42,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-12 01:01:42,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106826962] [2023-11-12 01:01:42,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:01:42,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 01:01:42,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:42,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 01:01:42,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:01:42,065 INFO L87 Difference]: Start difference. First operand 284 states and 518 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:42,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:42,448 INFO L93 Difference]: Finished difference Result 288 states and 522 transitions. [2023-11-12 01:01:42,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 01:01:42,449 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-12 01:01:42,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:42,451 INFO L225 Difference]: With dead ends: 288 [2023-11-12 01:01:42,451 INFO L226 Difference]: Without dead ends: 288 [2023-11-12 01:01:42,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:01:42,452 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:42,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 01:01:42,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-11-12 01:01:42,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2023-11-12 01:01:42,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 210 states have (on average 2.4857142857142858) internal successors, (522), 287 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:42,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 522 transitions. [2023-11-12 01:01:42,462 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 522 transitions. Word has length 15 [2023-11-12 01:01:42,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:42,463 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 522 transitions. [2023-11-12 01:01:42,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:42,463 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 522 transitions. [2023-11-12 01:01:42,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-12 01:01:42,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:42,464 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 1, 1, 1] [2023-11-12 01:01:42,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-12 01:01:42,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 01:01:42,670 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-12 01:01:42,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:42,671 INFO L85 PathProgramCache]: Analyzing trace with hash -270744778, now seen corresponding path program 3 times [2023-11-12 01:01:42,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:42,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640057925] [2023-11-12 01:01:42,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:42,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-12 01:01:43,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:43,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640057925] [2023-11-12 01:01:43,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640057925] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:43,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135065205] [2023-11-12 01:01:43,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:01:43,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:43,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:43,171 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:43,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 01:01:43,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:01:43,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:01:43,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 01:01:43,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-12 01:01:43,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-12 01:01:43,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135065205] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:01:43,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [382772604] [2023-11-12 01:01:43,707 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 01:01:43,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:01:43,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2023-11-12 01:01:43,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247657557] [2023-11-12 01:01:43,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:01:43,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 01:01:43,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:43,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 01:01:43,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-12 01:01:43,710 INFO L87 Difference]: Start difference. First operand 288 states and 522 transitions. Second operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:44,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:44,219 INFO L93 Difference]: Finished difference Result 292 states and 526 transitions. [2023-11-12 01:01:44,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 01:01:44,219 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-12 01:01:44,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:44,222 INFO L225 Difference]: With dead ends: 292 [2023-11-12 01:01:44,222 INFO L226 Difference]: Without dead ends: 292 [2023-11-12 01:01:44,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-12 01:01:44,223 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:44,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:01:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-11-12 01:01:44,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2023-11-12 01:01:44,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 214 states have (on average 2.457943925233645) internal successors, (526), 291 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 526 transitions. [2023-11-12 01:01:44,233 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 526 transitions. Word has length 19 [2023-11-12 01:01:44,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:44,234 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 526 transitions. [2023-11-12 01:01:44,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:01:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 526 transitions. [2023-11-12 01:01:44,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-12 01:01:44,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:44,235 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1] [2023-11-12 01:01:44,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:44,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 01:01:44,442 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-12 01:01:44,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:44,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1713945398, now seen corresponding path program 4 times [2023-11-12 01:01:44,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:44,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128254699] [2023-11-12 01:01:44,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:44,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-12 01:01:50,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:50,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128254699] [2023-11-12 01:01:50,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128254699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:50,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799404178] [2023-11-12 01:01:50,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 01:01:50,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:50,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:50,268 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:50,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86805b84-3c41-46cd-a9c3-6189ff267423/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process