./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/26_stack_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ff99639-81e9-41fc-b54e-34d8cc5488b0/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ff99639-81e9-41fc-b54e-34d8cc5488b0/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ff99639-81e9-41fc-b54e-34d8cc5488b0/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ff99639-81e9-41fc-b54e-34d8cc5488b0/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/26_stack_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ff99639-81e9-41fc-b54e-34d8cc5488b0/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ff99639-81e9-41fc-b54e-34d8cc5488b0/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:03:19,950 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:03:20,028 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ff99639-81e9-41fc-b54e-34d8cc5488b0/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 21:03:20,033 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:03:20,034 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:03:20,060 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:03:20,061 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:03:20,062 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:03:20,062 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:03:20,063 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:03:20,064 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:03:20,064 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:03:20,065 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:03:20,065 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 21:03:20,066 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:03:20,067 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:03:20,067 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 21:03:20,068 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 21:03:20,068 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:03:20,069 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 21:03:20,070 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 21:03:20,077 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 21:03:20,077 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:03:20,078 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:03:20,082 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:03:20,083 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:03:20,083 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:03:20,084 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:03:20,084 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:03:20,085 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:03:20,085 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:03:20,086 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:03:20,087 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:03:20,088 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:03:20,088 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:03:20,088 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:03:20,088 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:03:20,089 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:03:20,089 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:03:20,089 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:03:20,090 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:03:20,090 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:03:20,090 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 21:03:20,091 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:03:20,091 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:03:20,091 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:03:20,092 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_2ff99639-81e9-41fc-b54e-34d8cc5488b0/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ff99639-81e9-41fc-b54e-34d8cc5488b0/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d [2023-11-06 21:03:20,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:03:20,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:03:20,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:03:20,397 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:03:20,399 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:03:20,401 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ff99639-81e9-41fc-b54e-34d8cc5488b0/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/pthread-ext/26_stack_cas.i [2023-11-06 21:03:23,534 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:03:23,806 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:03:23,807 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ff99639-81e9-41fc-b54e-34d8cc5488b0/sv-benchmarks/c/pthread-ext/26_stack_cas.i [2023-11-06 21:03:23,831 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ff99639-81e9-41fc-b54e-34d8cc5488b0/bin/utaipan-verify-FOvIYxoinp/data/143470fc5/09e374465c254345a07f42c9456c8d82/FLAG71f414a48 [2023-11-06 21:03:23,849 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ff99639-81e9-41fc-b54e-34d8cc5488b0/bin/utaipan-verify-FOvIYxoinp/data/143470fc5/09e374465c254345a07f42c9456c8d82 [2023-11-06 21:03:23,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:03:23,859 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:03:23,866 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:03:23,866 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:03:23,871 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:03:23,872 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:03:23" (1/1) ... [2023-11-06 21:03:23,873 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a959129 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:23, skipping insertion in model container [2023-11-06 21:03:23,873 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:03:23" (1/1) ... [2023-11-06 21:03:23,933 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:03:24,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:03:24,434 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:03:24,511 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:03:24,569 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:03:24,569 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:24 WrapperNode [2023-11-06 21:03:24,569 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:03:24,571 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:03:24,571 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:03:24,571 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:03:24,579 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:24" (1/1) ... [2023-11-06 21:03:24,612 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:24" (1/1) ... [2023-11-06 21:03:24,656 INFO L138 Inliner]: procedures = 177, calls = 48, calls flagged for inlining = 17, calls inlined = 20, statements flattened = 192 [2023-11-06 21:03:24,657 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:03:24,657 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:03:24,658 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:03:24,658 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:03:24,668 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:24" (1/1) ... [2023-11-06 21:03:24,669 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:24" (1/1) ... [2023-11-06 21:03:24,685 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:24" (1/1) ... [2023-11-06 21:03:24,686 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:24" (1/1) ... [2023-11-06 21:03:24,699 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:24" (1/1) ... [2023-11-06 21:03:24,715 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:24" (1/1) ... [2023-11-06 21:03:24,717 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:24" (1/1) ... [2023-11-06 21:03:24,726 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:24" (1/1) ... [2023-11-06 21:03:24,730 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:03:24,731 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:03:24,733 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:03:24,734 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:03:24,735 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:24" (1/1) ... [2023-11-06 21:03:24,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:03:24,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ff99639-81e9-41fc-b54e-34d8cc5488b0/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:03:24,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ff99639-81e9-41fc-b54e-34d8cc5488b0/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:03:24,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ff99639-81e9-41fc-b54e-34d8cc5488b0/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:03:24,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:03:24,817 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-06 21:03:24,817 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-06 21:03:24,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:03:24,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:03:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:03:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:03:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:03:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:03:24,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:03:24,822 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 21:03:25,004 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:03:25,006 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:03:25,587 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:03:25,938 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:03:25,938 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 21:03:25,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:03:25 BoogieIcfgContainer [2023-11-06 21:03:25,942 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:03:25,946 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:03:25,946 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:03:25,950 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:03:25,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:03:23" (1/3) ... [2023-11-06 21:03:25,951 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8281fec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:03:25, skipping insertion in model container [2023-11-06 21:03:25,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:24" (2/3) ... [2023-11-06 21:03:25,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8281fec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:03:25, skipping insertion in model container [2023-11-06 21:03:25,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:03:25" (3/3) ... [2023-11-06 21:03:25,956 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas.i [2023-11-06 21:03:25,976 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:03:25,977 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-11-06 21:03:25,978 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:03:26,150 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 21:03:26,190 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-06 21:03:26,204 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 163 transitions, 330 flow [2023-11-06 21:03:26,207 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 163 transitions, 330 flow [2023-11-06 21:03:26,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 163 transitions, 330 flow [2023-11-06 21:03:26,282 INFO L124 PetriNetUnfolderBase]: 11/179 cut-off events. [2023-11-06 21:03:26,283 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:03:26,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 179 events. 11/179 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 367 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 139. Up to 4 conditions per place. [2023-11-06 21:03:26,294 INFO L119 LiptonReduction]: Number of co-enabled transitions 4598 [2023-11-06 21:03:34,583 INFO L134 LiptonReduction]: Checked pairs total: 7588 [2023-11-06 21:03:34,583 INFO L136 LiptonReduction]: Total number of compositions: 209 [2023-11-06 21:03:34,598 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 69 transitions, 142 flow [2023-11-06 21:03:34,655 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 437 states, 235 states have (on average 3.6638297872340426) internal successors, (861), 436 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:03:34,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:03:34,683 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;@ecf5b07, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:03:34,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2023-11-06 21:03:34,686 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 235 states have (on average 3.6638297872340426) internal successors, (861), 436 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:03:34,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 21:03:34,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:03:34,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 21:03:34,692 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 21:03:34,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:03:34,697 INFO L85 PathProgramCache]: Analyzing trace with hash 34114, now seen corresponding path program 1 times [2023-11-06 21:03:34,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:03:34,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008751996] [2023-11-06 21:03:34,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:03:34,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:03:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:03:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:03:35,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:03:35,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008751996] [2023-11-06 21:03:35,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008751996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:03:35,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:03:35,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:03:35,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512251411] [2023-11-06 21:03:35,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:03:35,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:03:35,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:03:35,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:03:35,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:03:35,065 INFO L87 Difference]: Start difference. First operand has 437 states, 235 states have (on average 3.6638297872340426) internal successors, (861), 436 states have internal predecessors, (861), 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, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:03:35,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:03:35,256 INFO L93 Difference]: Finished difference Result 306 states and 588 transitions. [2023-11-06 21:03:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:03:35,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-06 21:03:35,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:03:35,284 INFO L225 Difference]: With dead ends: 306 [2023-11-06 21:03:35,284 INFO L226 Difference]: Without dead ends: 306 [2023-11-06 21:03:35,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:03:35,289 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 40 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:03:35,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 2 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:03:35,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-11-06 21:03:35,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 238. [2023-11-06 21:03:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 184 states have (on average 2.6467391304347827) internal successors, (487), 237 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:03:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 487 transitions. [2023-11-06 21:03:35,350 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 487 transitions. Word has length 2 [2023-11-06 21:03:35,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:03:35,351 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 487 transitions. [2023-11-06 21:03:35,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:03:35,351 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 487 transitions. [2023-11-06 21:03:35,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 21:03:35,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:03:35,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 21:03:35,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:03:35,353 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 21:03:35,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:03:35,353 INFO L85 PathProgramCache]: Analyzing trace with hash 34112, now seen corresponding path program 1 times [2023-11-06 21:03:35,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:03:35,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609218617] [2023-11-06 21:03:35,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:03:35,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:03:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:03:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:03:35,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:03:35,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609218617] [2023-11-06 21:03:35,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609218617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:03:35,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:03:35,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:03:35,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128706956] [2023-11-06 21:03:35,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:03:35,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:03:35,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:03:35,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:03:35,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:03:35,458 INFO L87 Difference]: Start difference. First operand 238 states and 487 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:03:35,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:03:35,551 INFO L93 Difference]: Finished difference Result 203 states and 394 transitions. [2023-11-06 21:03:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:03:35,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-06 21:03:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:03:35,554 INFO L225 Difference]: With dead ends: 203 [2023-11-06 21:03:35,554 INFO L226 Difference]: Without dead ends: 203 [2023-11-06 21:03:35,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:03:35,556 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:03:35,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:03:35,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-11-06 21:03:35,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2023-11-06 21:03:35,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 170 states have (on average 2.3176470588235296) internal successors, (394), 202 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:03:35,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 394 transitions. [2023-11-06 21:03:35,582 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 394 transitions. Word has length 2 [2023-11-06 21:03:35,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:03:35,584 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 394 transitions. [2023-11-06 21:03:35,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:03:35,588 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 394 transitions. [2023-11-06 21:03:35,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 21:03:35,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:03:35,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 21:03:35,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:03:35,590 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 21:03:35,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:03:35,591 INFO L85 PathProgramCache]: Analyzing trace with hash 32809731, now seen corresponding path program 1 times [2023-11-06 21:03:35,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:03:35,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402544493] [2023-11-06 21:03:35,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:03:35,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:03:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:03:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:03:35,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:03:35,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402544493] [2023-11-06 21:03:35,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402544493] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:03:35,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:03:35,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:03:35,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803797952] [2023-11-06 21:03:35,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:03:35,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:03:35,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:03:35,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:03:35,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:03:35,831 INFO L87 Difference]: Start difference. First operand 203 states and 394 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) [2023-11-06 21:03:36,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:03:36,008 INFO L93 Difference]: Finished difference Result 245 states and 469 transitions. [2023-11-06 21:03:36,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:03:36,009 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 4 [2023-11-06 21:03:36,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:03:36,011 INFO L225 Difference]: With dead ends: 245 [2023-11-06 21:03:36,011 INFO L226 Difference]: Without dead ends: 245 [2023-11-06 21:03:36,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:03:36,013 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 76 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:03:36,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 4 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:03:36,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-11-06 21:03:36,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 214. [2023-11-06 21:03:36,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 182 states have (on average 2.3626373626373627) internal successors, (430), 213 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:03:36,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 430 transitions. [2023-11-06 21:03:36,032 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 430 transitions. Word has length 4 [2023-11-06 21:03:36,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:03:36,040 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 430 transitions. [2023-11-06 21:03:36,041 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) [2023-11-06 21:03:36,041 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 430 transitions. [2023-11-06 21:03:36,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 21:03:36,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:03:36,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 21:03:36,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:03:36,044 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 21:03:36,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:03:36,044 INFO L85 PathProgramCache]: Analyzing trace with hash 32809732, now seen corresponding path program 1 times [2023-11-06 21:03:36,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:03:36,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013238890] [2023-11-06 21:03:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:03:36,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:03:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:03:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:03:36,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:03:36,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013238890] [2023-11-06 21:03:36,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013238890] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:03:36,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:03:36,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:03:36,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114841811] [2023-11-06 21:03:36,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:03:36,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:03:36,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:03:36,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:03:36,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:03:36,188 INFO L87 Difference]: Start difference. First operand 214 states and 430 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) [2023-11-06 21:03:36,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:03:36,270 INFO L93 Difference]: Finished difference Result 198 states and 396 transitions. [2023-11-06 21:03:36,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:03:36,270 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 4 [2023-11-06 21:03:36,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:03:36,272 INFO L225 Difference]: With dead ends: 198 [2023-11-06 21:03:36,273 INFO L226 Difference]: Without dead ends: 198 [2023-11-06 21:03:36,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:03:36,274 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:03:36,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:03:36,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-06 21:03:36,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2023-11-06 21:03:36,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 171 states have (on average 2.3157894736842106) internal successors, (396), 197 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:03:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 396 transitions. [2023-11-06 21:03:36,286 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 396 transitions. Word has length 4 [2023-11-06 21:03:36,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:03:36,287 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 396 transitions. [2023-11-06 21:03:36,287 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) [2023-11-06 21:03:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 396 transitions. [2023-11-06 21:03:36,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 21:03:36,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:03:36,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 21:03:36,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:03:36,288 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 21:03:36,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:03:36,289 INFO L85 PathProgramCache]: Analyzing trace with hash 32809572, now seen corresponding path program 1 times [2023-11-06 21:03:36,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:03:36,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69786673] [2023-11-06 21:03:36,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:03:36,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:03:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:03:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:03:36,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:03:36,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69786673] [2023-11-06 21:03:36,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69786673] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:03:36,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:03:36,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:03:36,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063515875] [2023-11-06 21:03:36,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:03:36,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:03:36,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:03:36,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:03:36,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:03:36,416 INFO L87 Difference]: Start difference. First operand 198 states and 396 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) [2023-11-06 21:03:36,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:03:36,556 INFO L93 Difference]: Finished difference Result 214 states and 414 transitions. [2023-11-06 21:03:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:03:36,557 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 4 [2023-11-06 21:03:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:03:36,559 INFO L225 Difference]: With dead ends: 214 [2023-11-06 21:03:36,559 INFO L226 Difference]: Without dead ends: 214 [2023-11-06 21:03:36,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:03:36,560 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 56 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:03:36,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 3 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:03:36,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-06 21:03:36,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 190. [2023-11-06 21:03:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 165 states have (on average 2.315151515151515) internal successors, (382), 189 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:03:36,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 382 transitions. [2023-11-06 21:03:36,571 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 382 transitions. Word has length 4 [2023-11-06 21:03:36,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:03:36,572 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 382 transitions. [2023-11-06 21:03:36,572 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) [2023-11-06 21:03:36,572 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 382 transitions. [2023-11-06 21:03:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 21:03:36,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:03:36,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 21:03:36,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:03:36,574 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 21:03:36,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:03:36,574 INFO L85 PathProgramCache]: Analyzing trace with hash 32809573, now seen corresponding path program 1 times [2023-11-06 21:03:36,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:03:36,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049135352] [2023-11-06 21:03:36,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:03:36,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:03:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:03:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:03:36,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:03:36,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049135352] [2023-11-06 21:03:36,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049135352] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:03:36,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:03:36,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:03:36,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111303798] [2023-11-06 21:03:36,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:03:36,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:03:36,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:03:36,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:03:36,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:03:36,770 INFO L87 Difference]: Start difference. First operand 190 states and 382 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) [2023-11-06 21:03:36,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:03:36,839 INFO L93 Difference]: Finished difference Result 182 states and 368 transitions. [2023-11-06 21:03:36,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:03:36,840 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 4 [2023-11-06 21:03:36,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:03:36,842 INFO L225 Difference]: With dead ends: 182 [2023-11-06 21:03:36,842 INFO L226 Difference]: Without dead ends: 182 [2023-11-06 21:03:36,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:03:36,843 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:03:36,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:03:36,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-06 21:03:36,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2023-11-06 21:03:36,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 159 states have (on average 2.3144654088050314) internal successors, (368), 181 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:03:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 368 transitions. [2023-11-06 21:03:36,852 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 368 transitions. Word has length 4 [2023-11-06 21:03:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:03:36,852 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 368 transitions. [2023-11-06 21:03:36,852 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) [2023-11-06 21:03:36,852 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 368 transitions. [2023-11-06 21:03:36,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 21:03:36,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:03:36,853 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 21:03:36,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 21:03:36,853 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 21:03:36,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:03:36,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1465323043, now seen corresponding path program 1 times [2023-11-06 21:03:36,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:03:36,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000316270] [2023-11-06 21:03:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:03:36,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:03:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:03:36,866 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 21:03:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:03:36,893 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-06 21:03:36,893 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 21:03:36,894 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (81 of 82 remaining) [2023-11-06 21:03:36,896 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 82 remaining) [2023-11-06 21:03:36,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 82 remaining) [2023-11-06 21:03:36,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 82 remaining) [2023-11-06 21:03:36,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 82 remaining) [2023-11-06 21:03:36,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 82 remaining) [2023-11-06 21:03:36,898 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 82 remaining) [2023-11-06 21:03:36,898 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 82 remaining) [2023-11-06 21:03:36,898 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 82 remaining) [2023-11-06 21:03:36,898 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 82 remaining) [2023-11-06 21:03:36,898 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 82 remaining) [2023-11-06 21:03:36,899 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 82 remaining) [2023-11-06 21:03:36,899 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 82 remaining) [2023-11-06 21:03:36,899 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 82 remaining) [2023-11-06 21:03:36,899 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 82 remaining) [2023-11-06 21:03:36,899 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 82 remaining) [2023-11-06 21:03:36,899 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 82 remaining) [2023-11-06 21:03:36,900 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 82 remaining) [2023-11-06 21:03:36,900 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 82 remaining) [2023-11-06 21:03:36,900 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 82 remaining) [2023-11-06 21:03:36,900 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 82 remaining) [2023-11-06 21:03:36,900 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 82 remaining) [2023-11-06 21:03:36,901 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 82 remaining) [2023-11-06 21:03:36,901 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (58 of 82 remaining) [2023-11-06 21:03:36,901 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 82 remaining) [2023-11-06 21:03:36,901 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 82 remaining) [2023-11-06 21:03:36,901 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (55 of 82 remaining) [2023-11-06 21:03:36,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 82 remaining) [2023-11-06 21:03:36,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 82 remaining) [2023-11-06 21:03:36,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 82 remaining) [2023-11-06 21:03:36,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 82 remaining) [2023-11-06 21:03:36,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 82 remaining) [2023-11-06 21:03:36,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 82 remaining) [2023-11-06 21:03:36,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 82 remaining) [2023-11-06 21:03:36,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 82 remaining) [2023-11-06 21:03:36,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 82 remaining) [2023-11-06 21:03:36,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 82 remaining) [2023-11-06 21:03:36,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (44 of 82 remaining) [2023-11-06 21:03:36,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 82 remaining) [2023-11-06 21:03:36,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 82 remaining) [2023-11-06 21:03:36,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 82 remaining) [2023-11-06 21:03:36,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 82 remaining) [2023-11-06 21:03:36,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (39 of 82 remaining) [2023-11-06 21:03:36,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 82 remaining) [2023-11-06 21:03:36,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 82 remaining) [2023-11-06 21:03:36,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 82 remaining) [2023-11-06 21:03:36,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 82 remaining) [2023-11-06 21:03:36,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 82 remaining) [2023-11-06 21:03:36,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 82 remaining) [2023-11-06 21:03:36,906 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 82 remaining) [2023-11-06 21:03:36,906 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 82 remaining) [2023-11-06 21:03:36,906 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 82 remaining) [2023-11-06 21:03:36,906 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 82 remaining) [2023-11-06 21:03:36,906 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 82 remaining) [2023-11-06 21:03:36,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 82 remaining) [2023-11-06 21:03:36,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 82 remaining) [2023-11-06 21:03:36,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 82 remaining) [2023-11-06 21:03:36,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 82 remaining) [2023-11-06 21:03:36,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 82 remaining) [2023-11-06 21:03:36,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 82 remaining) [2023-11-06 21:03:36,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 82 remaining) [2023-11-06 21:03:36,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 82 remaining) [2023-11-06 21:03:36,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 82 remaining) [2023-11-06 21:03:36,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 82 remaining) [2023-11-06 21:03:36,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 82 remaining) [2023-11-06 21:03:36,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (16 of 82 remaining) [2023-11-06 21:03:36,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 82 remaining) [2023-11-06 21:03:36,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 82 remaining) [2023-11-06 21:03:36,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (13 of 82 remaining) [2023-11-06 21:03:36,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 82 remaining) [2023-11-06 21:03:36,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 82 remaining) [2023-11-06 21:03:36,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 82 remaining) [2023-11-06 21:03:36,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 82 remaining) [2023-11-06 21:03:36,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 82 remaining) [2023-11-06 21:03:36,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 82 remaining) [2023-11-06 21:03:36,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 82 remaining) [2023-11-06 21:03:36,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 82 remaining) [2023-11-06 21:03:36,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 82 remaining) [2023-11-06 21:03:36,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 82 remaining) [2023-11-06 21:03:36,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (2 of 82 remaining) [2023-11-06 21:03:36,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 82 remaining) [2023-11-06 21:03:36,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 82 remaining) [2023-11-06 21:03:36,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:03:36,914 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:03:36,916 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 21:03:36,916 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 21:03:37,018 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 21:03:37,023 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-06 21:03:37,024 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 271 places, 285 transitions, 580 flow [2023-11-06 21:03:37,024 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 271 places, 285 transitions, 580 flow [2023-11-06 21:03:37,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 285 transitions, 580 flow [2023-11-06 21:03:37,111 INFO L124 PetriNetUnfolderBase]: 21/319 cut-off events. [2023-11-06 21:03:37,112 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 21:03:37,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 319 events. 21/319 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 968 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 260. Up to 6 conditions per place. [2023-11-06 21:03:37,146 INFO L119 LiptonReduction]: Number of co-enabled transitions 38720 [2023-11-06 21:03:47,575 INFO L134 LiptonReduction]: Checked pairs total: 108330 [2023-11-06 21:03:47,575 INFO L136 LiptonReduction]: Total number of compositions: 276 [2023-11-06 21:03:47,576 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 134 places, 143 transitions, 296 flow [2023-11-06 21:03:48,755 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32884 states, 24723 states have (on average 4.088743275492456) internal successors, (101086), 32883 states have internal predecessors, (101086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:03:48,766 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:03:48,766 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;@ecf5b07, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:03:48,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 121 error locations. [2023-11-06 21:03:48,847 INFO L276 IsEmpty]: Start isEmpty. Operand has 32884 states, 24723 states have (on average 4.088743275492456) internal successors, (101086), 32883 states have internal predecessors, (101086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:03:48,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 21:03:48,848 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:03:48,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 21:03:48,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 21:03:48,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:03:48,849 INFO L85 PathProgramCache]: Analyzing trace with hash 56414, now seen corresponding path program 1 times [2023-11-06 21:03:48,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:03:48,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946812423] [2023-11-06 21:03:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:03:48,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:03:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:03:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:03:48,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:03:48,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946812423] [2023-11-06 21:03:48,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946812423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:03:48,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:03:48,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:03:48,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672134669] [2023-11-06 21:03:48,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:03:48,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:03:48,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:03:48,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:03:48,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:03:49,018 INFO L87 Difference]: Start difference. First operand has 32884 states, 24723 states have (on average 4.088743275492456) internal successors, (101086), 32883 states have internal predecessors, (101086), 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 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:03:49,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:03:49,474 INFO L93 Difference]: Finished difference Result 16421 states and 49373 transitions. [2023-11-06 21:03:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:03:49,475 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-06 21:03:49,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:03:49,671 INFO L225 Difference]: With dead ends: 16421 [2023-11-06 21:03:49,671 INFO L226 Difference]: Without dead ends: 16421 [2023-11-06 21:03:49,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:03:49,672 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:03:49,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:03:49,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16421 states. [2023-11-06 21:03:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16421 to 16421. [2023-11-06 21:03:50,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16421 states, 14011 states have (on average 3.5238740989222754) internal successors, (49373), 16420 states have internal predecessors, (49373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:03:50,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16421 states to 16421 states and 49373 transitions. [2023-11-06 21:03:50,854 INFO L78 Accepts]: Start accepts. Automaton has 16421 states and 49373 transitions. Word has length 2 [2023-11-06 21:03:50,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:03:50,854 INFO L495 AbstractCegarLoop]: Abstraction has 16421 states and 49373 transitions. [2023-11-06 21:03:50,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:03:50,855 INFO L276 IsEmpty]: Start isEmpty. Operand 16421 states and 49373 transitions. [2023-11-06 21:03:50,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 21:03:50,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:03:50,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 21:03:50,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 21:03:50,856 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2023-11-06 21:03:50,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:03:50,857 INFO L85 PathProgramCache]: Analyzing trace with hash 56369, now seen corresponding path program 1 times [2023-11-06 21:03:50,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:03:50,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500033368] [2023-11-06 21:03:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:03:50,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:03:50,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:03:50,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:03:50,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:03:50,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500033368] [2023-11-06 21:03:50,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500033368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:03:50,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:03:50,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:03:50,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107243986] [2023-11-06 21:03:50,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:03:50,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:03:50,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:03:50,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:03:50,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:03:50,895 INFO L87 Difference]: Start difference. First operand 16421 states and 49373 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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)