./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0 --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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 19:25:54,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:25:54,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:25:54,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:25:54,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:25:54,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:25:54,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:25:54,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:25:54,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:25:54,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:25:54,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:25:54,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:25:54,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:25:54,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:25:54,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:25:54,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:25:54,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:25:54,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:25:54,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:25:54,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:25:54,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:25:54,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:25:54,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:25:54,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:25:54,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:25:54,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:25:54,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:25:54,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:25:54,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:25:54,696 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:25:54,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:25:54,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:25:54,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:25:54,699 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:25:54,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:25:54,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:25:54,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:25:54,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:25:54,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:25:54,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:25:54,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:25:54,707 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-16 19:25:54,748 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:25:54,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:25:54,754 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:25:54,754 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:25:54,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:25:54,755 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:25:54,755 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:25:54,756 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:25:54,756 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:25:54,756 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:25:54,757 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:25:54,757 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:25:54,758 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:25:54,758 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:25:54,758 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:25:54,758 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:25:54,758 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:25:54,759 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:25:54,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 19:25:54,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 19:25:54,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:25:54,760 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:25:54,760 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 19:25:54,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:25:54,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:25:54,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:25:54,761 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 19:25:54,761 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 19:25:54,762 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 19:25:54,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:25:54,762 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 19:25:54,762 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:25:54,763 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:25:54,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:25:54,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:25:54,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:25:54,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:25:54,764 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:25:54,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:25:54,764 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:25:54,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:25:54,764 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:25:54,765 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 [2022-11-16 19:25:55,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:25:55,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:25:55,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:25:55,086 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:25:55,088 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:25:55,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-11-16 19:25:55,167 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/data/9ebd9275b/3666e0460c8049efba416570dc8a792f/FLAGb624f1c4a [2022-11-16 19:25:55,700 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:25:55,700 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-11-16 19:25:55,707 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/data/9ebd9275b/3666e0460c8049efba416570dc8a792f/FLAGb624f1c4a [2022-11-16 19:25:56,076 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/data/9ebd9275b/3666e0460c8049efba416570dc8a792f [2022-11-16 19:25:56,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:25:56,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:25:56,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:25:56,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:25:56,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:25:56,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:25:56" (1/1) ... [2022-11-16 19:25:56,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51e5164a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:56, skipping insertion in model container [2022-11-16 19:25:56,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:25:56" (1/1) ... [2022-11-16 19:25:56,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:25:56,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:25:56,340 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-11-16 19:25:56,350 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:25:56,360 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:25:56,395 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-11-16 19:25:56,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:25:56,417 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:25:56,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:56 WrapperNode [2022-11-16 19:25:56,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:25:56,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:25:56,419 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:25:56,419 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:25:56,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:56" (1/1) ... [2022-11-16 19:25:56,444 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:56" (1/1) ... [2022-11-16 19:25:56,473 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-11-16 19:25:56,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:25:56,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:25:56,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:25:56,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:25:56,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:56" (1/1) ... [2022-11-16 19:25:56,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:56" (1/1) ... [2022-11-16 19:25:56,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:56" (1/1) ... [2022-11-16 19:25:56,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:56" (1/1) ... [2022-11-16 19:25:56,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:56" (1/1) ... [2022-11-16 19:25:56,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:56" (1/1) ... [2022-11-16 19:25:56,513 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:56" (1/1) ... [2022-11-16 19:25:56,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:56" (1/1) ... [2022-11-16 19:25:56,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:25:56,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:25:56,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:25:56,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:25:56,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:56" (1/1) ... [2022-11-16 19:25:56,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:25:56,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:25:56,559 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:25:56,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:25:56,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:25:56,612 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 19:25:56,612 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 19:25:56,612 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 19:25:56,612 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 19:25:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:25:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 19:25:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 19:25:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 19:25:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 19:25:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:25:56,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:25:56,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 19:25:56,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 19:25:56,616 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 19:25:56,764 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:25:56,768 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:25:57,046 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:25:57,095 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:25:57,095 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 19:25:57,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:25:57 BoogieIcfgContainer [2022-11-16 19:25:57,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:25:57,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:25:57,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:25:57,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:25:57,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:25:56" (1/3) ... [2022-11-16 19:25:57,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c684f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:25:57, skipping insertion in model container [2022-11-16 19:25:57,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:56" (2/3) ... [2022-11-16 19:25:57,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c684f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:25:57, skipping insertion in model container [2022-11-16 19:25:57,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:25:57" (3/3) ... [2022-11-16 19:25:57,107 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2022-11-16 19:25:57,131 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:25:57,131 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-16 19:25:57,131 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 19:25:57,210 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 19:25:57,247 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 19:25:57,264 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 99 transitions, 214 flow [2022-11-16 19:25:57,267 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 99 transitions, 214 flow [2022-11-16 19:25:57,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 99 transitions, 214 flow [2022-11-16 19:25:57,324 INFO L130 PetriNetUnfolder]: 6/97 cut-off events. [2022-11-16 19:25:57,324 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 19:25:57,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 97 events. 6/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2022-11-16 19:25:57,331 INFO L119 LiptonReduction]: Number of co-enabled transitions 660 [2022-11-16 19:26:01,277 INFO L134 LiptonReduction]: Checked pairs total: 797 [2022-11-16 19:26:01,277 INFO L136 LiptonReduction]: Total number of compositions: 99 [2022-11-16 19:26:01,286 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 27 transitions, 70 flow [2022-11-16 19:26:01,305 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 67 states, 57 states have (on average 2.7017543859649122) internal successors, (154), 66 states have internal predecessors, (154), 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) [2022-11-16 19:26:01,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:26:01,330 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;@547be565, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:26:01,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-16 19:26:01,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 57 states have (on average 2.7017543859649122) internal successors, (154), 66 states have internal predecessors, (154), 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) [2022-11-16 19:26:01,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-16 19:26:01,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:01,339 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-16 19:26:01,339 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:01,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:01,345 INFO L85 PathProgramCache]: Analyzing trace with hash 395, now seen corresponding path program 1 times [2022-11-16 19:26:01,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:01,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025284258] [2022-11-16 19:26:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:01,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:01,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:01,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025284258] [2022-11-16 19:26:01,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025284258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:26:01,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:26:01,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-16 19:26:01,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242224001] [2022-11-16 19:26:01,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:26:01,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 19:26:01,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:01,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 19:26:01,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 19:26:01,489 INFO L87 Difference]: Start difference. First operand has 67 states, 57 states have (on average 2.7017543859649122) internal successors, (154), 66 states have internal predecessors, (154), 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 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-11-16 19:26:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:01,537 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2022-11-16 19:26:01,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 19:26:01,540 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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 1 [2022-11-16 19:26:01,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:01,550 INFO L225 Difference]: With dead ends: 64 [2022-11-16 19:26:01,550 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 19:26:01,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 19:26:01,555 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:01,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:26:01,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 19:26:01,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-16 19:26:01,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 57 states have (on average 2.6491228070175437) internal successors, (151), 63 states have internal predecessors, (151), 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) [2022-11-16 19:26:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 151 transitions. [2022-11-16 19:26:01,598 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 151 transitions. Word has length 1 [2022-11-16 19:26:01,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:01,598 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 151 transitions. [2022-11-16 19:26:01,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-11-16 19:26:01,599 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 151 transitions. [2022-11-16 19:26:01,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 19:26:01,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:01,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 19:26:01,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:26:01,600 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:01,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:01,601 INFO L85 PathProgramCache]: Analyzing trace with hash 389105, now seen corresponding path program 1 times [2022-11-16 19:26:01,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:01,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494636271] [2022-11-16 19:26:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:01,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:01,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:01,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494636271] [2022-11-16 19:26:01,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494636271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:26:01,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:26:01,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:26:01,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839574419] [2022-11-16 19:26:01,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:26:01,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:26:01,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:01,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:26:01,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:26:01,846 INFO L87 Difference]: Start difference. First operand 64 states and 151 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:01,888 INFO L93 Difference]: Finished difference Result 58 states and 139 transitions. [2022-11-16 19:26:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:26:01,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 19:26:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:01,890 INFO L225 Difference]: With dead ends: 58 [2022-11-16 19:26:01,890 INFO L226 Difference]: Without dead ends: 58 [2022-11-16 19:26:01,890 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 [2022-11-16 19:26:01,892 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:01,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:26:01,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-16 19:26:01,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-16 19:26:01,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 2.6226415094339623) internal successors, (139), 57 states have internal predecessors, (139), 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) [2022-11-16 19:26:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 139 transitions. [2022-11-16 19:26:01,901 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 139 transitions. Word has length 3 [2022-11-16 19:26:01,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:01,902 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 139 transitions. [2022-11-16 19:26:01,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:01,902 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 139 transitions. [2022-11-16 19:26:01,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 19:26:01,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:01,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 19:26:01,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 19:26:01,903 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:01,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:01,904 INFO L85 PathProgramCache]: Analyzing trace with hash 389106, now seen corresponding path program 1 times [2022-11-16 19:26:01,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:01,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520264465] [2022-11-16 19:26:01,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:01,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:01,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:01,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520264465] [2022-11-16 19:26:01,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520264465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:26:01,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:26:01,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:26:01,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902390584] [2022-11-16 19:26:01,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:26:01,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:26:01,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:01,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:26:01,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:26:01,985 INFO L87 Difference]: Start difference. First operand 58 states and 139 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:02,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:02,012 INFO L93 Difference]: Finished difference Result 52 states and 127 transitions. [2022-11-16 19:26:02,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:26:02,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 19:26:02,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:02,014 INFO L225 Difference]: With dead ends: 52 [2022-11-16 19:26:02,015 INFO L226 Difference]: Without dead ends: 52 [2022-11-16 19:26:02,015 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 [2022-11-16 19:26:02,016 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:02,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 2 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:26:02,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-16 19:26:02,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-16 19:26:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 51 states have internal predecessors, (127), 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) [2022-11-16 19:26:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2022-11-16 19:26:02,024 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 3 [2022-11-16 19:26:02,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:02,024 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2022-11-16 19:26:02,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2022-11-16 19:26:02,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 19:26:02,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:02,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 19:26:02,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 19:26:02,026 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:02,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:02,026 INFO L85 PathProgramCache]: Analyzing trace with hash 373940301, now seen corresponding path program 1 times [2022-11-16 19:26:02,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:02,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873215974] [2022-11-16 19:26:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:02,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:02,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:02,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873215974] [2022-11-16 19:26:02,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873215974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:26:02,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:26:02,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:26:02,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754357887] [2022-11-16 19:26:02,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:26:02,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:26:02,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:02,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:26:02,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:26:02,129 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-16 19:26:02,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:02,167 INFO L93 Difference]: Finished difference Result 43 states and 100 transitions. [2022-11-16 19:26:02,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:26:02,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-11-16 19:26:02,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:02,170 INFO L225 Difference]: With dead ends: 43 [2022-11-16 19:26:02,171 INFO L226 Difference]: Without dead ends: 43 [2022-11-16 19:26:02,171 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 [2022-11-16 19:26:02,172 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:02,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 2 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:26:02,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-16 19:26:02,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-16 19:26:02,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 42 states have internal predecessors, (100), 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) [2022-11-16 19:26:02,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 100 transitions. [2022-11-16 19:26:02,182 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 100 transitions. Word has length 5 [2022-11-16 19:26:02,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:02,186 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 100 transitions. [2022-11-16 19:26:02,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-16 19:26:02,187 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 100 transitions. [2022-11-16 19:26:02,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 19:26:02,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:02,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 19:26:02,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 19:26:02,188 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:02,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:02,190 INFO L85 PathProgramCache]: Analyzing trace with hash 373940302, now seen corresponding path program 1 times [2022-11-16 19:26:02,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:02,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138824728] [2022-11-16 19:26:02,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:02,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:02,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:02,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138824728] [2022-11-16 19:26:02,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138824728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:26:02,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:26:02,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:26:02,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868804387] [2022-11-16 19:26:02,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:26:02,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:26:02,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:02,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:26:02,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:26:02,339 INFO L87 Difference]: Start difference. First operand 43 states and 100 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-16 19:26:02,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:02,372 INFO L93 Difference]: Finished difference Result 34 states and 73 transitions. [2022-11-16 19:26:02,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:26:02,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-11-16 19:26:02,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:02,374 INFO L225 Difference]: With dead ends: 34 [2022-11-16 19:26:02,375 INFO L226 Difference]: Without dead ends: 34 [2022-11-16 19:26:02,375 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 [2022-11-16 19:26:02,377 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:02,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:26:02,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-16 19:26:02,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-16 19:26:02,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 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) [2022-11-16 19:26:02,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 73 transitions. [2022-11-16 19:26:02,389 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 73 transitions. Word has length 5 [2022-11-16 19:26:02,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:02,389 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 73 transitions. [2022-11-16 19:26:02,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-16 19:26:02,391 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 73 transitions. [2022-11-16 19:26:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 19:26:02,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:02,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:02,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 19:26:02,392 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:02,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:02,394 INFO L85 PathProgramCache]: Analyzing trace with hash -950332130, now seen corresponding path program 1 times [2022-11-16 19:26:02,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:02,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53584217] [2022-11-16 19:26:02,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:02,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:02,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:02,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53584217] [2022-11-16 19:26:02,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53584217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:26:02,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:26:02,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:26:02,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952008645] [2022-11-16 19:26:02,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:26:02,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:26:02,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:02,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:26:02,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:26:02,697 INFO L87 Difference]: Start difference. First operand 34 states and 73 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-11-16 19:26:02,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:02,748 INFO L93 Difference]: Finished difference Result 57 states and 116 transitions. [2022-11-16 19:26:02,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:26:02,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 13 [2022-11-16 19:26:02,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:02,751 INFO L225 Difference]: With dead ends: 57 [2022-11-16 19:26:02,752 INFO L226 Difference]: Without dead ends: 42 [2022-11-16 19:26:02,752 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 [2022-11-16 19:26:02,757 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:02,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:26:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-16 19:26:02,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-16 19:26:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 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) [2022-11-16 19:26:02,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 88 transitions. [2022-11-16 19:26:02,777 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 88 transitions. Word has length 13 [2022-11-16 19:26:02,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:02,777 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 88 transitions. [2022-11-16 19:26:02,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-11-16 19:26:02,778 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 88 transitions. [2022-11-16 19:26:02,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 19:26:02,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:02,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:02,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 19:26:02,781 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:02,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1577914678, now seen corresponding path program 1 times [2022-11-16 19:26:02,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:02,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787629877] [2022-11-16 19:26:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:02,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:02,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:02,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787629877] [2022-11-16 19:26:02,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787629877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:02,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213621795] [2022-11-16 19:26:02,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:02,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:02,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:02,994 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:03,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:26:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:03,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:26:03,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:03,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:03,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:03,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213621795] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:03,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:26:03,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2022-11-16 19:26:03,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831470438] [2022-11-16 19:26:03,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:26:03,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:26:03,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:03,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:26:03,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:26:03,313 INFO L87 Difference]: Start difference. First operand 42 states and 88 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-11-16 19:26:03,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:03,393 INFO L93 Difference]: Finished difference Result 48 states and 102 transitions. [2022-11-16 19:26:03,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:26:03,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 19:26:03,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:03,394 INFO L225 Difference]: With dead ends: 48 [2022-11-16 19:26:03,395 INFO L226 Difference]: Without dead ends: 48 [2022-11-16 19:26:03,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:26:03,396 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:03,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 6 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:26:03,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-16 19:26:03,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-16 19:26:03,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 47 states have internal predecessors, (102), 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) [2022-11-16 19:26:03,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 102 transitions. [2022-11-16 19:26:03,400 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 102 transitions. Word has length 14 [2022-11-16 19:26:03,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:03,400 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 102 transitions. [2022-11-16 19:26:03,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-11-16 19:26:03,401 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 102 transitions. [2022-11-16 19:26:03,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 19:26:03,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:03,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:03,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 19:26:03,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 19:26:03,607 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:03,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:03,608 INFO L85 PathProgramCache]: Analyzing trace with hash 199113838, now seen corresponding path program 2 times [2022-11-16 19:26:03,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:03,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679597309] [2022-11-16 19:26:03,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:03,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:03,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:03,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679597309] [2022-11-16 19:26:03,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679597309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:03,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436167188] [2022-11-16 19:26:03,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:26:03,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:03,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:03,796 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:03,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:26:03,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:26:03,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:26:03,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:26:03,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:03,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:04,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436167188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:04,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1524542076] [2022-11-16 19:26:04,044 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:04,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:04,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-16 19:26:04,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73298207] [2022-11-16 19:26:04,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:04,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:26:04,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:04,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:26:04,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:26:04,049 INFO L87 Difference]: Start difference. First operand 48 states and 102 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-11-16 19:26:04,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:04,194 INFO L93 Difference]: Finished difference Result 72 states and 148 transitions. [2022-11-16 19:26:04,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:26:04,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 19:26:04,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:04,196 INFO L225 Difference]: With dead ends: 72 [2022-11-16 19:26:04,196 INFO L226 Difference]: Without dead ends: 72 [2022-11-16 19:26:04,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 19:26:04,197 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:04,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 7 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:26:04,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-16 19:26:04,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2022-11-16 19:26:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.183673469387755) internal successors, (107), 49 states have internal predecessors, (107), 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) [2022-11-16 19:26:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 107 transitions. [2022-11-16 19:26:04,202 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 107 transitions. Word has length 14 [2022-11-16 19:26:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:04,202 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 107 transitions. [2022-11-16 19:26:04,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-11-16 19:26:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 107 transitions. [2022-11-16 19:26:04,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 19:26:04,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:04,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:04,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:04,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:04,405 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:04,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:04,406 INFO L85 PathProgramCache]: Analyzing trace with hash -570985860, now seen corresponding path program 3 times [2022-11-16 19:26:04,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:04,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044576380] [2022-11-16 19:26:04,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:04,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:04,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:04,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044576380] [2022-11-16 19:26:04,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044576380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:26:04,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:26:04,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:26:04,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871452652] [2022-11-16 19:26:04,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:26:04,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:26:04,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:04,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:26:04,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:26:04,545 INFO L87 Difference]: Start difference. First operand 50 states and 107 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-16 19:26:04,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:04,639 INFO L93 Difference]: Finished difference Result 52 states and 108 transitions. [2022-11-16 19:26:04,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:26:04,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 19:26:04,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:04,641 INFO L225 Difference]: With dead ends: 52 [2022-11-16 19:26:04,641 INFO L226 Difference]: Without dead ends: 50 [2022-11-16 19:26:04,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:26:04,644 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:04,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 6 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:26:04,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-16 19:26:04,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-16 19:26:04,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 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) [2022-11-16 19:26:04,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 105 transitions. [2022-11-16 19:26:04,651 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 105 transitions. Word has length 14 [2022-11-16 19:26:04,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:04,651 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 105 transitions. [2022-11-16 19:26:04,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-16 19:26:04,652 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 105 transitions. [2022-11-16 19:26:04,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 19:26:04,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:04,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:04,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 19:26:04,656 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:04,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:04,656 INFO L85 PathProgramCache]: Analyzing trace with hash 906090800, now seen corresponding path program 4 times [2022-11-16 19:26:04,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:04,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261210905] [2022-11-16 19:26:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:04,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:04,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:04,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261210905] [2022-11-16 19:26:04,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261210905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:04,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115997765] [2022-11-16 19:26:04,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:26:04,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:04,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:04,760 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:04,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 19:26:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:04,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:26:04,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:04,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:04,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115997765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:04,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [506632087] [2022-11-16 19:26:04,956 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:04,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:04,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-16 19:26:04,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000197042] [2022-11-16 19:26:04,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:04,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 19:26:04,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:04,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 19:26:04,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 19:26:04,962 INFO L87 Difference]: Start difference. First operand 50 states and 105 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2022-11-16 19:26:05,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:05,072 INFO L93 Difference]: Finished difference Result 70 states and 143 transitions. [2022-11-16 19:26:05,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:26:05,073 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 19:26:05,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:05,074 INFO L225 Difference]: With dead ends: 70 [2022-11-16 19:26:05,074 INFO L226 Difference]: Without dead ends: 70 [2022-11-16 19:26:05,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 19:26:05,075 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:05,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:26:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-16 19:26:05,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2022-11-16 19:26:05,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 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) [2022-11-16 19:26:05,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 105 transitions. [2022-11-16 19:26:05,079 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 105 transitions. Word has length 14 [2022-11-16 19:26:05,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:05,079 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 105 transitions. [2022-11-16 19:26:05,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2022-11-16 19:26:05,080 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 105 transitions. [2022-11-16 19:26:05,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 19:26:05,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:05,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:05,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:05,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:05,286 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:05,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:05,286 INFO L85 PathProgramCache]: Analyzing trace with hash 135991102, now seen corresponding path program 5 times [2022-11-16 19:26:05,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:05,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591007965] [2022-11-16 19:26:05,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:05,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:05,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:05,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591007965] [2022-11-16 19:26:05,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591007965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:26:05,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:26:05,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:26:05,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191563329] [2022-11-16 19:26:05,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:26:05,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:26:05,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:05,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:26:05,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:26:05,398 INFO L87 Difference]: Start difference. First operand 50 states and 105 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-16 19:26:05,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:05,480 INFO L93 Difference]: Finished difference Result 60 states and 116 transitions. [2022-11-16 19:26:05,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:26:05,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 19:26:05,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:05,482 INFO L225 Difference]: With dead ends: 60 [2022-11-16 19:26:05,482 INFO L226 Difference]: Without dead ends: 58 [2022-11-16 19:26:05,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:26:05,483 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:05,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 5 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:26:05,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-16 19:26:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2022-11-16 19:26:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 states have internal predecessors, (100), 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) [2022-11-16 19:26:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 100 transitions. [2022-11-16 19:26:05,487 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 100 transitions. Word has length 14 [2022-11-16 19:26:05,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:05,487 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 100 transitions. [2022-11-16 19:26:05,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-16 19:26:05,487 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 100 transitions. [2022-11-16 19:26:05,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 19:26:05,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:05,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:05,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 19:26:05,488 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:05,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:05,489 INFO L85 PathProgramCache]: Analyzing trace with hash 659485288, now seen corresponding path program 6 times [2022-11-16 19:26:05,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:05,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188576169] [2022-11-16 19:26:05,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:05,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:05,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:05,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188576169] [2022-11-16 19:26:05,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188576169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:26:05,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:26:05,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:26:05,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113379750] [2022-11-16 19:26:05,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:26:05,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:26:05,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:05,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:26:05,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:26:05,600 INFO L87 Difference]: Start difference. First operand 48 states and 100 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-16 19:26:05,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:05,699 INFO L93 Difference]: Finished difference Result 48 states and 98 transitions. [2022-11-16 19:26:05,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:26:05,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 19:26:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:05,700 INFO L225 Difference]: With dead ends: 48 [2022-11-16 19:26:05,701 INFO L226 Difference]: Without dead ends: 44 [2022-11-16 19:26:05,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:26:05,701 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:05,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 9 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:26:05,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-16 19:26:05,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-16 19:26:05,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 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) [2022-11-16 19:26:05,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 92 transitions. [2022-11-16 19:26:05,705 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 92 transitions. Word has length 14 [2022-11-16 19:26:05,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:05,705 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 92 transitions. [2022-11-16 19:26:05,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-16 19:26:05,705 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 92 transitions. [2022-11-16 19:26:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 19:26:05,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:05,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:05,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 19:26:05,707 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:05,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:05,707 INFO L85 PathProgramCache]: Analyzing trace with hash 377849877, now seen corresponding path program 1 times [2022-11-16 19:26:05,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:05,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439463249] [2022-11-16 19:26:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:05,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:05,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:05,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439463249] [2022-11-16 19:26:05,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439463249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:05,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795745879] [2022-11-16 19:26:05,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:05,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:05,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:05,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:05,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 19:26:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:05,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:26:05,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:26:06,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:26:06,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795745879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:06,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1693579934] [2022-11-16 19:26:06,110 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:06,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:06,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2022-11-16 19:26:06,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110374051] [2022-11-16 19:26:06,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:06,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:26:06,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:06,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:26:06,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:26:06,117 INFO L87 Difference]: Start difference. First operand 44 states and 92 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-11-16 19:26:06,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:06,193 INFO L93 Difference]: Finished difference Result 87 states and 181 transitions. [2022-11-16 19:26:06,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:26:06,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 19:26:06,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:06,195 INFO L225 Difference]: With dead ends: 87 [2022-11-16 19:26:06,195 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 19:26:06,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:26:06,196 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 19 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:06,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 7 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:26:06,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 19:26:06,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2022-11-16 19:26:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 states have internal predecessors, (130), 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) [2022-11-16 19:26:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 130 transitions. [2022-11-16 19:26:06,207 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 130 transitions. Word has length 15 [2022-11-16 19:26:06,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:06,207 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 130 transitions. [2022-11-16 19:26:06,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-11-16 19:26:06,208 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 130 transitions. [2022-11-16 19:26:06,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 19:26:06,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:06,209 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:06,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:06,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 19:26:06,414 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:06,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:06,415 INFO L85 PathProgramCache]: Analyzing trace with hash -928457171, now seen corresponding path program 2 times [2022-11-16 19:26:06,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:06,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812312353] [2022-11-16 19:26:06,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:06,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:06,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:06,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812312353] [2022-11-16 19:26:06,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812312353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:06,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442956598] [2022-11-16 19:26:06,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:26:06,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:06,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:06,626 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:06,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 19:26:06,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:26:06,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:26:06,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 19:26:06,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:06,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:06,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442956598] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:06,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [770260444] [2022-11-16 19:26:06,893 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:06,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:06,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-11-16 19:26:06,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612917518] [2022-11-16 19:26:06,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:06,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 19:26:06,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:06,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 19:26:06,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 19:26:06,897 INFO L87 Difference]: Start difference. First operand 60 states and 130 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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) [2022-11-16 19:26:07,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:07,257 INFO L93 Difference]: Finished difference Result 128 states and 284 transitions. [2022-11-16 19:26:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 19:26:07,258 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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 16 [2022-11-16 19:26:07,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:07,259 INFO L225 Difference]: With dead ends: 128 [2022-11-16 19:26:07,259 INFO L226 Difference]: Without dead ends: 128 [2022-11-16 19:26:07,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-16 19:26:07,260 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 110 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:07,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 19 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:26:07,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-16 19:26:07,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 66. [2022-11-16 19:26:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.2153846153846155) internal successors, (144), 65 states have internal predecessors, (144), 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) [2022-11-16 19:26:07,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 144 transitions. [2022-11-16 19:26:07,264 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 144 transitions. Word has length 16 [2022-11-16 19:26:07,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:07,264 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 144 transitions. [2022-11-16 19:26:07,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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) [2022-11-16 19:26:07,264 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 144 transitions. [2022-11-16 19:26:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 19:26:07,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:07,265 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:07,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:07,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 19:26:07,465 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:07,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:07,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1576916905, now seen corresponding path program 3 times [2022-11-16 19:26:07,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:07,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128060956] [2022-11-16 19:26:07,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:07,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:07,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:07,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128060956] [2022-11-16 19:26:07,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128060956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:07,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098464547] [2022-11-16 19:26:07,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:26:07,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:07,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:07,786 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:07,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 19:26:07,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:26:07,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:26:07,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 19:26:07,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:07,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:08,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098464547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:08,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [620799051] [2022-11-16 19:26:08,088 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:08,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:08,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-11-16 19:26:08,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105688214] [2022-11-16 19:26:08,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:08,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 19:26:08,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:08,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 19:26:08,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-16 19:26:08,092 INFO L87 Difference]: Start difference. First operand 66 states and 144 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2022-11-16 19:26:08,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:08,830 INFO L93 Difference]: Finished difference Result 246 states and 515 transitions. [2022-11-16 19:26:08,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 19:26:08,831 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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 16 [2022-11-16 19:26:08,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:08,832 INFO L225 Difference]: With dead ends: 246 [2022-11-16 19:26:08,833 INFO L226 Difference]: Without dead ends: 238 [2022-11-16 19:26:08,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2022-11-16 19:26:08,834 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 131 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:08,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 18 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:26:08,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-16 19:26:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 78. [2022-11-16 19:26:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.3376623376623376) internal successors, (180), 77 states have internal predecessors, (180), 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) [2022-11-16 19:26:08,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 180 transitions. [2022-11-16 19:26:08,840 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 180 transitions. Word has length 16 [2022-11-16 19:26:08,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:08,841 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 180 transitions. [2022-11-16 19:26:08,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2022-11-16 19:26:08,841 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 180 transitions. [2022-11-16 19:26:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 19:26:08,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:08,842 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:08,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:09,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 19:26:09,048 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:09,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:09,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1947950693, now seen corresponding path program 4 times [2022-11-16 19:26:09,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:09,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976545824] [2022-11-16 19:26:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:09,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:09,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:09,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976545824] [2022-11-16 19:26:09,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976545824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:09,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255729501] [2022-11-16 19:26:09,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:26:09,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:09,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:09,225 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:09,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 19:26:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:09,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 19:26:09,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:09,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:09,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:09,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255729501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:09,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1632558725] [2022-11-16 19:26:09,528 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:09,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:09,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-11-16 19:26:09,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394208516] [2022-11-16 19:26:09,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:09,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 19:26:09,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:09,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 19:26:09,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-16 19:26:09,530 INFO L87 Difference]: Start difference. First operand 78 states and 180 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 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) [2022-11-16 19:26:10,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:10,415 INFO L93 Difference]: Finished difference Result 214 states and 450 transitions. [2022-11-16 19:26:10,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 19:26:10,415 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 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 16 [2022-11-16 19:26:10,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:10,417 INFO L225 Difference]: With dead ends: 214 [2022-11-16 19:26:10,417 INFO L226 Difference]: Without dead ends: 208 [2022-11-16 19:26:10,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2022-11-16 19:26:10,418 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 135 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:10,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 19 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:26:10,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-16 19:26:10,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 78. [2022-11-16 19:26:10,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.311688311688312) internal successors, (178), 77 states have internal predecessors, (178), 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) [2022-11-16 19:26:10,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 178 transitions. [2022-11-16 19:26:10,423 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 178 transitions. Word has length 16 [2022-11-16 19:26:10,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:10,424 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 178 transitions. [2022-11-16 19:26:10,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 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) [2022-11-16 19:26:10,424 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 178 transitions. [2022-11-16 19:26:10,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 19:26:10,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:10,425 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:10,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:10,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 19:26:10,636 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:10,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:10,636 INFO L85 PathProgramCache]: Analyzing trace with hash -721610251, now seen corresponding path program 5 times [2022-11-16 19:26:10,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:10,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150099747] [2022-11-16 19:26:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:10,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:10,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:10,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:10,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150099747] [2022-11-16 19:26:10,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150099747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:10,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078337577] [2022-11-16 19:26:10,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:26:10,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:10,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:10,808 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:10,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 19:26:10,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:26:10,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:26:10,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 19:26:10,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:10,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:11,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078337577] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:11,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [821597355] [2022-11-16 19:26:11,075 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:11,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:11,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-11-16 19:26:11,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700751909] [2022-11-16 19:26:11,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:11,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 19:26:11,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:11,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 19:26:11,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-16 19:26:11,077 INFO L87 Difference]: Start difference. First operand 78 states and 178 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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) [2022-11-16 19:26:11,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:11,730 INFO L93 Difference]: Finished difference Result 220 states and 501 transitions. [2022-11-16 19:26:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 19:26:11,731 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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 16 [2022-11-16 19:26:11,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:11,732 INFO L225 Difference]: With dead ends: 220 [2022-11-16 19:26:11,732 INFO L226 Difference]: Without dead ends: 220 [2022-11-16 19:26:11,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2022-11-16 19:26:11,733 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 114 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:11,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 15 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:26:11,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-16 19:26:11,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 88. [2022-11-16 19:26:11,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.425287356321839) internal successors, (211), 87 states have internal predecessors, (211), 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) [2022-11-16 19:26:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 211 transitions. [2022-11-16 19:26:11,738 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 211 transitions. Word has length 16 [2022-11-16 19:26:11,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:11,738 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 211 transitions. [2022-11-16 19:26:11,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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) [2022-11-16 19:26:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 211 transitions. [2022-11-16 19:26:11,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 19:26:11,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:11,740 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:11,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:11,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 19:26:11,943 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:11,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:11,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1395676973, now seen corresponding path program 6 times [2022-11-16 19:26:11,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:11,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201010093] [2022-11-16 19:26:11,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:11,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:12,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:12,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201010093] [2022-11-16 19:26:12,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201010093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:12,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261333535] [2022-11-16 19:26:12,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:26:12,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:12,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:12,093 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:12,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 19:26:12,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:26:12,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:26:12,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 19:26:12,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:12,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:12,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261333535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:12,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1435403671] [2022-11-16 19:26:12,375 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:12,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:12,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-11-16 19:26:12,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562294059] [2022-11-16 19:26:12,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:12,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 19:26:12,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:12,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 19:26:12,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-11-16 19:26:12,379 INFO L87 Difference]: Start difference. First operand 88 states and 211 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2022-11-16 19:26:13,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:13,362 INFO L93 Difference]: Finished difference Result 292 states and 658 transitions. [2022-11-16 19:26:13,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 19:26:13,363 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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 16 [2022-11-16 19:26:13,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:13,365 INFO L225 Difference]: With dead ends: 292 [2022-11-16 19:26:13,365 INFO L226 Difference]: Without dead ends: 292 [2022-11-16 19:26:13,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2022-11-16 19:26:13,366 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 110 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:13,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 14 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 19:26:13,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-11-16 19:26:13,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 116. [2022-11-16 19:26:13,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.5739130434782607) internal successors, (296), 115 states have internal predecessors, (296), 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) [2022-11-16 19:26:13,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 296 transitions. [2022-11-16 19:26:13,375 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 296 transitions. Word has length 16 [2022-11-16 19:26:13,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:13,375 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 296 transitions. [2022-11-16 19:26:13,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2022-11-16 19:26:13,376 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 296 transitions. [2022-11-16 19:26:13,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 19:26:13,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:13,377 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:13,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:13,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 19:26:13,582 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:13,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:13,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1340398033, now seen corresponding path program 7 times [2022-11-16 19:26:13,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:13,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956650818] [2022-11-16 19:26:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:13,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:13,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:13,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:13,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956650818] [2022-11-16 19:26:13,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956650818] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:13,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867529287] [2022-11-16 19:26:13,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:26:13,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:13,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:13,751 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:13,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 19:26:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:13,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 19:26:13,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:13,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:14,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867529287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:14,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1484355949] [2022-11-16 19:26:14,008 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:14,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:14,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-11-16 19:26:14,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757077565] [2022-11-16 19:26:14,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:14,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 19:26:14,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:14,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 19:26:14,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-16 19:26:14,012 INFO L87 Difference]: Start difference. First operand 116 states and 296 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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) [2022-11-16 19:26:14,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:14,514 INFO L93 Difference]: Finished difference Result 212 states and 467 transitions. [2022-11-16 19:26:14,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 19:26:14,515 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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 16 [2022-11-16 19:26:14,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:14,517 INFO L225 Difference]: With dead ends: 212 [2022-11-16 19:26:14,517 INFO L226 Difference]: Without dead ends: 204 [2022-11-16 19:26:14,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2022-11-16 19:26:14,518 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 96 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:14,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 10 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:26:14,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-16 19:26:14,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 110. [2022-11-16 19:26:14,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.541284403669725) internal successors, (277), 109 states have internal predecessors, (277), 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) [2022-11-16 19:26:14,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 277 transitions. [2022-11-16 19:26:14,526 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 277 transitions. Word has length 16 [2022-11-16 19:26:14,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:14,526 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 277 transitions. [2022-11-16 19:26:14,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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) [2022-11-16 19:26:14,527 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 277 transitions. [2022-11-16 19:26:14,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 19:26:14,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:14,528 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:14,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:14,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:14,733 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:14,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:14,733 INFO L85 PathProgramCache]: Analyzing trace with hash 570298335, now seen corresponding path program 8 times [2022-11-16 19:26:14,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:14,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178499558] [2022-11-16 19:26:14,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:14,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:14,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:14,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178499558] [2022-11-16 19:26:14,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178499558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:14,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961796977] [2022-11-16 19:26:14,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:26:14,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:14,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:14,879 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:14,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 19:26:15,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:26:15,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:26:15,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 19:26:15,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:15,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:15,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961796977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:15,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [542910174] [2022-11-16 19:26:15,156 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:15,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:15,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-11-16 19:26:15,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523334731] [2022-11-16 19:26:15,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:15,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 19:26:15,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:15,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 19:26:15,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-16 19:26:15,159 INFO L87 Difference]: Start difference. First operand 110 states and 277 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 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) [2022-11-16 19:26:16,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:16,003 INFO L93 Difference]: Finished difference Result 188 states and 423 transitions. [2022-11-16 19:26:16,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 19:26:16,003 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 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 16 [2022-11-16 19:26:16,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:16,005 INFO L225 Difference]: With dead ends: 188 [2022-11-16 19:26:16,005 INFO L226 Difference]: Without dead ends: 182 [2022-11-16 19:26:16,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2022-11-16 19:26:16,006 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 58 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:16,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 9 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 19:26:16,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-16 19:26:16,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 82. [2022-11-16 19:26:16,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.4074074074074074) internal successors, (195), 81 states have internal predecessors, (195), 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) [2022-11-16 19:26:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 195 transitions. [2022-11-16 19:26:16,010 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 195 transitions. Word has length 16 [2022-11-16 19:26:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:16,010 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 195 transitions. [2022-11-16 19:26:16,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 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) [2022-11-16 19:26:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 195 transitions. [2022-11-16 19:26:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 19:26:16,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:16,012 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:16,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:16,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:16,212 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:16,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:16,213 INFO L85 PathProgramCache]: Analyzing trace with hash -10266114, now seen corresponding path program 9 times [2022-11-16 19:26:16,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:16,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453047949] [2022-11-16 19:26:16,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:16,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:16,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:16,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453047949] [2022-11-16 19:26:16,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453047949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:16,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935973155] [2022-11-16 19:26:16,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:26:16,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:16,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:16,407 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:16,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 19:26:16,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:26:16,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:26:16,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 19:26:16,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:16,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:16,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935973155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:16,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [68707380] [2022-11-16 19:26:16,949 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:16,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:16,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 15 [2022-11-16 19:26:16,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232100080] [2022-11-16 19:26:16,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:16,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 19:26:16,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:16,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 19:26:16,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:26:16,950 INFO L87 Difference]: Start difference. First operand 82 states and 195 transitions. Second operand has 17 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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) [2022-11-16 19:26:17,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:17,249 INFO L93 Difference]: Finished difference Result 186 states and 426 transitions. [2022-11-16 19:26:17,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 19:26:17,250 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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 17 [2022-11-16 19:26:17,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:17,251 INFO L225 Difference]: With dead ends: 186 [2022-11-16 19:26:17,252 INFO L226 Difference]: Without dead ends: 146 [2022-11-16 19:26:17,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:26:17,254 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 85 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:17,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 28 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:26:17,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-16 19:26:17,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 122. [2022-11-16 19:26:17,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.487603305785124) internal successors, (301), 121 states have internal predecessors, (301), 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) [2022-11-16 19:26:17,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 301 transitions. [2022-11-16 19:26:17,262 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 301 transitions. Word has length 17 [2022-11-16 19:26:17,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:17,265 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 301 transitions. [2022-11-16 19:26:17,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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) [2022-11-16 19:26:17,265 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 301 transitions. [2022-11-16 19:26:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:26:17,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:17,267 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:17,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:17,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:17,472 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:17,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:17,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1240888810, now seen corresponding path program 10 times [2022-11-16 19:26:17,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:17,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074275359] [2022-11-16 19:26:17,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:17,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:17,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:17,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074275359] [2022-11-16 19:26:17,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074275359] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:17,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946291588] [2022-11-16 19:26:17,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:26:17,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:17,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:17,685 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:17,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 19:26:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:17,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:26:17,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:17,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:17,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946291588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:17,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1383097022] [2022-11-16 19:26:17,992 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:17,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:17,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-11-16 19:26:17,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388474331] [2022-11-16 19:26:17,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:17,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 19:26:17,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:17,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 19:26:17,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-16 19:26:17,994 INFO L87 Difference]: Start difference. First operand 122 states and 301 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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) [2022-11-16 19:26:18,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:18,794 INFO L93 Difference]: Finished difference Result 358 states and 889 transitions. [2022-11-16 19:26:18,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 19:26:18,795 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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 18 [2022-11-16 19:26:18,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:18,797 INFO L225 Difference]: With dead ends: 358 [2022-11-16 19:26:18,797 INFO L226 Difference]: Without dead ends: 358 [2022-11-16 19:26:18,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-11-16 19:26:18,798 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 203 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:18,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 31 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 19:26:18,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-11-16 19:26:18,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 130. [2022-11-16 19:26:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.496124031007752) internal successors, (322), 129 states have internal predecessors, (322), 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) [2022-11-16 19:26:18,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 322 transitions. [2022-11-16 19:26:18,820 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 322 transitions. Word has length 18 [2022-11-16 19:26:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:18,821 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 322 transitions. [2022-11-16 19:26:18,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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) [2022-11-16 19:26:18,821 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 322 transitions. [2022-11-16 19:26:18,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:26:18,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:18,824 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:18,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:19,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:19,034 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:19,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:19,034 INFO L85 PathProgramCache]: Analyzing trace with hash -723610738, now seen corresponding path program 11 times [2022-11-16 19:26:19,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:19,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057463929] [2022-11-16 19:26:19,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:19,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:19,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:19,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057463929] [2022-11-16 19:26:19,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057463929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:19,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072618750] [2022-11-16 19:26:19,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:26:19,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:19,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:19,408 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:19,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 19:26:19,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 19:26:19,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:26:19,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:26:19,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:19,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:19,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072618750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:19,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1693340054] [2022-11-16 19:26:19,873 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:19,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:19,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-11-16 19:26:19,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408874488] [2022-11-16 19:26:19,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:19,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 19:26:19,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:19,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 19:26:19,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-11-16 19:26:19,875 INFO L87 Difference]: Start difference. First operand 130 states and 322 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 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) [2022-11-16 19:26:22,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:22,465 INFO L93 Difference]: Finished difference Result 766 states and 1724 transitions. [2022-11-16 19:26:22,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-16 19:26:22,466 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 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 18 [2022-11-16 19:26:22,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:22,471 INFO L225 Difference]: With dead ends: 766 [2022-11-16 19:26:22,472 INFO L226 Difference]: Without dead ends: 754 [2022-11-16 19:26:22,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=685, Invalid=2285, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 19:26:22,474 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 702 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:22,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 22 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 19:26:22,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-11-16 19:26:22,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 180. [2022-11-16 19:26:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.664804469273743) internal successors, (477), 179 states have internal predecessors, (477), 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) [2022-11-16 19:26:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 477 transitions. [2022-11-16 19:26:22,501 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 477 transitions. Word has length 18 [2022-11-16 19:26:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:22,501 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 477 transitions. [2022-11-16 19:26:22,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 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) [2022-11-16 19:26:22,502 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 477 transitions. [2022-11-16 19:26:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:26:22,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:22,503 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:22,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:22,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 19:26:22,709 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:22,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:22,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1493710436, now seen corresponding path program 12 times [2022-11-16 19:26:22,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:22,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435023797] [2022-11-16 19:26:22,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:22,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:23,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:23,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435023797] [2022-11-16 19:26:23,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435023797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:23,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869116960] [2022-11-16 19:26:23,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:26:23,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:23,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:23,015 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:23,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 19:26:23,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:26:23,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:26:23,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:26:23,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:23,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:23,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869116960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:23,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1335323011] [2022-11-16 19:26:23,426 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:23,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:23,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-11-16 19:26:23,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380195635] [2022-11-16 19:26:23,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:23,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 19:26:23,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:23,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 19:26:23,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-11-16 19:26:23,428 INFO L87 Difference]: Start difference. First operand 180 states and 477 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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) [2022-11-16 19:26:26,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:26,498 INFO L93 Difference]: Finished difference Result 682 states and 1562 transitions. [2022-11-16 19:26:26,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-16 19:26:26,500 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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 18 [2022-11-16 19:26:26,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:26,503 INFO L225 Difference]: With dead ends: 682 [2022-11-16 19:26:26,503 INFO L226 Difference]: Without dead ends: 674 [2022-11-16 19:26:26,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1025, Invalid=3805, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 19:26:26,505 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 461 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:26,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 38 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 19:26:26,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-16 19:26:26,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 164. [2022-11-16 19:26:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.5950920245398774) internal successors, (423), 163 states have internal predecessors, (423), 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) [2022-11-16 19:26:26,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 423 transitions. [2022-11-16 19:26:26,517 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 423 transitions. Word has length 18 [2022-11-16 19:26:26,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:26,517 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 423 transitions. [2022-11-16 19:26:26,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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) [2022-11-16 19:26:26,517 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 423 transitions. [2022-11-16 19:26:26,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:26:26,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:26,518 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:26,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:26,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 19:26:26,729 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:26,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:26,729 INFO L85 PathProgramCache]: Analyzing trace with hash 131695916, now seen corresponding path program 13 times [2022-11-16 19:26:26,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:26,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138883290] [2022-11-16 19:26:26,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:26,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:26,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:26,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138883290] [2022-11-16 19:26:26,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138883290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:26,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503446394] [2022-11-16 19:26:26,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:26:26,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:26,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:26,923 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:26,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 19:26:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:27,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:26:27,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:27,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:27,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:27,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503446394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:27,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1340900524] [2022-11-16 19:26:27,244 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:27,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:27,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-16 19:26:27,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700818140] [2022-11-16 19:26:27,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:27,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 19:26:27,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:27,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 19:26:27,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:26:27,246 INFO L87 Difference]: Start difference. First operand 164 states and 423 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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) [2022-11-16 19:26:29,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:29,463 INFO L93 Difference]: Finished difference Result 562 states and 1383 transitions. [2022-11-16 19:26:29,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 19:26:29,463 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 18 [2022-11-16 19:26:29,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:29,466 INFO L225 Difference]: With dead ends: 562 [2022-11-16 19:26:29,466 INFO L226 Difference]: Without dead ends: 538 [2022-11-16 19:26:29,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=423, Invalid=1469, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 19:26:29,468 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 216 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:29,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 20 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 19:26:29,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-11-16 19:26:29,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 160. [2022-11-16 19:26:29,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.5849056603773586) internal successors, (411), 159 states have internal predecessors, (411), 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) [2022-11-16 19:26:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 411 transitions. [2022-11-16 19:26:29,477 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 411 transitions. Word has length 18 [2022-11-16 19:26:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:29,477 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 411 transitions. [2022-11-16 19:26:29,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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) [2022-11-16 19:26:29,478 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 411 transitions. [2022-11-16 19:26:29,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:26:29,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:29,479 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:29,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:29,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:29,684 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:29,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:29,684 INFO L85 PathProgramCache]: Analyzing trace with hash 876398414, now seen corresponding path program 14 times [2022-11-16 19:26:29,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:29,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890277930] [2022-11-16 19:26:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:29,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:29,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:29,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890277930] [2022-11-16 19:26:29,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890277930] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:29,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041447285] [2022-11-16 19:26:29,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:26:29,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:29,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:29,883 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:29,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 19:26:29,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:26:29,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:26:29,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:26:29,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:30,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:30,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041447285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:30,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1861987444] [2022-11-16 19:26:30,244 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:30,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:30,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-16 19:26:30,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615882394] [2022-11-16 19:26:30,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:30,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 19:26:30,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:30,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 19:26:30,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-16 19:26:30,248 INFO L87 Difference]: Start difference. First operand 160 states and 411 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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) [2022-11-16 19:26:31,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:31,748 INFO L93 Difference]: Finished difference Result 564 states and 1413 transitions. [2022-11-16 19:26:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 19:26:31,749 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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 18 [2022-11-16 19:26:31,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:31,752 INFO L225 Difference]: With dead ends: 564 [2022-11-16 19:26:31,752 INFO L226 Difference]: Without dead ends: 564 [2022-11-16 19:26:31,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=360, Invalid=1532, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 19:26:31,753 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 222 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:31,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 23 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 19:26:31,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-16 19:26:31,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 168. [2022-11-16 19:26:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.6167664670658684) internal successors, (437), 167 states have internal predecessors, (437), 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) [2022-11-16 19:26:31,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 437 transitions. [2022-11-16 19:26:31,764 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 437 transitions. Word has length 18 [2022-11-16 19:26:31,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:31,764 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 437 transitions. [2022-11-16 19:26:31,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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) [2022-11-16 19:26:31,764 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 437 transitions. [2022-11-16 19:26:31,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:26:31,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:31,765 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:31,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:31,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 19:26:31,971 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:31,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:31,971 INFO L85 PathProgramCache]: Analyzing trace with hash -267850538, now seen corresponding path program 15 times [2022-11-16 19:26:31,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:31,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086287224] [2022-11-16 19:26:31,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:31,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:32,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:32,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086287224] [2022-11-16 19:26:32,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086287224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:32,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209220286] [2022-11-16 19:26:32,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:26:32,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:32,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:32,138 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:32,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 19:26:32,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:26:32,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:26:32,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:26:32,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:32,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:32,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209220286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:32,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [308257587] [2022-11-16 19:26:32,507 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:32,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:32,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-16 19:26:32,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142859142] [2022-11-16 19:26:32,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:32,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 19:26:32,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:32,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 19:26:32,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-11-16 19:26:32,509 INFO L87 Difference]: Start difference. First operand 168 states and 437 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 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) [2022-11-16 19:26:34,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:34,856 INFO L93 Difference]: Finished difference Result 562 states and 1320 transitions. [2022-11-16 19:26:34,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 19:26:34,856 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 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 18 [2022-11-16 19:26:34,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:34,859 INFO L225 Difference]: With dead ends: 562 [2022-11-16 19:26:34,860 INFO L226 Difference]: Without dead ends: 538 [2022-11-16 19:26:34,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=413, Invalid=1843, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 19:26:34,861 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 154 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:34,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 13 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 19:26:34,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-11-16 19:26:34,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 184. [2022-11-16 19:26:34,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.66120218579235) internal successors, (487), 183 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) [2022-11-16 19:26:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 487 transitions. [2022-11-16 19:26:34,871 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 487 transitions. Word has length 18 [2022-11-16 19:26:34,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:34,872 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 487 transitions. [2022-11-16 19:26:34,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 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) [2022-11-16 19:26:34,872 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 487 transitions. [2022-11-16 19:26:34,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:26:34,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:34,873 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:34,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:35,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 19:26:35,079 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:35,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:35,079 INFO L85 PathProgramCache]: Analyzing trace with hash 2087792918, now seen corresponding path program 16 times [2022-11-16 19:26:35,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:35,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328251635] [2022-11-16 19:26:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:35,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:35,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:35,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328251635] [2022-11-16 19:26:35,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328251635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:35,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404050979] [2022-11-16 19:26:35,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:26:35,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:35,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:35,250 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:35,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 19:26:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:35,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:26:35,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:35,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:35,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404050979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:35,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [486386503] [2022-11-16 19:26:35,639 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:35,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:35,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-16 19:26:35,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474110600] [2022-11-16 19:26:35,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:35,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 19:26:35,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:35,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 19:26:35,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-16 19:26:35,642 INFO L87 Difference]: Start difference. First operand 184 states and 487 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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) [2022-11-16 19:26:37,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:37,356 INFO L93 Difference]: Finished difference Result 568 states and 1393 transitions. [2022-11-16 19:26:37,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 19:26:37,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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 18 [2022-11-16 19:26:37,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:37,361 INFO L225 Difference]: With dead ends: 568 [2022-11-16 19:26:37,361 INFO L226 Difference]: Without dead ends: 568 [2022-11-16 19:26:37,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=338, Invalid=1554, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 19:26:37,362 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 177 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:37,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 13 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 19:26:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-11-16 19:26:37,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 204. [2022-11-16 19:26:37,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.6945812807881775) internal successors, (547), 203 states have internal predecessors, (547), 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) [2022-11-16 19:26:37,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 547 transitions. [2022-11-16 19:26:37,373 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 547 transitions. Word has length 18 [2022-11-16 19:26:37,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:37,373 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 547 transitions. [2022-11-16 19:26:37,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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) [2022-11-16 19:26:37,374 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 547 transitions. [2022-11-16 19:26:37,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:26:37,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:37,375 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:37,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-16 19:26:37,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 19:26:37,580 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:37,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:37,580 INFO L85 PathProgramCache]: Analyzing trace with hash 241614380, now seen corresponding path program 17 times [2022-11-16 19:26:37,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:37,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667975826] [2022-11-16 19:26:37,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:37,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:37,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:37,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667975826] [2022-11-16 19:26:37,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667975826] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:37,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673331246] [2022-11-16 19:26:37,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:26:37,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:37,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:37,771 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:37,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 19:26:37,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:26:37,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:26:37,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:26:37,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:37,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:38,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673331246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:38,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [266554766] [2022-11-16 19:26:38,146 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:38,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:38,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-16 19:26:38,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273847298] [2022-11-16 19:26:38,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:38,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 19:26:38,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:38,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 19:26:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:26:38,148 INFO L87 Difference]: Start difference. First operand 204 states and 547 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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) [2022-11-16 19:26:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:40,632 INFO L93 Difference]: Finished difference Result 502 states and 1247 transitions. [2022-11-16 19:26:40,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 19:26:40,632 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 18 [2022-11-16 19:26:40,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:40,635 INFO L225 Difference]: With dead ends: 502 [2022-11-16 19:26:40,635 INFO L226 Difference]: Without dead ends: 474 [2022-11-16 19:26:40,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 19:26:40,636 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 145 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:40,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 9 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 19:26:40,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-11-16 19:26:40,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 236. [2022-11-16 19:26:40,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.74468085106383) internal successors, (645), 235 states have internal predecessors, (645), 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) [2022-11-16 19:26:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 645 transitions. [2022-11-16 19:26:40,645 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 645 transitions. Word has length 18 [2022-11-16 19:26:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:40,646 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 645 transitions. [2022-11-16 19:26:40,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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) [2022-11-16 19:26:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 645 transitions. [2022-11-16 19:26:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:26:40,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:40,647 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:40,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:40,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 19:26:40,852 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:40,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:40,854 INFO L85 PathProgramCache]: Analyzing trace with hash 986316878, now seen corresponding path program 18 times [2022-11-16 19:26:40,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:40,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041217706] [2022-11-16 19:26:40,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:40,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:41,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:41,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041217706] [2022-11-16 19:26:41,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041217706] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:41,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890091133] [2022-11-16 19:26:41,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:26:41,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:41,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:41,048 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:41,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 19:26:41,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:26:41,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:26:41,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:26:41,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:41,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:41,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890091133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:41,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1215852715] [2022-11-16 19:26:41,371 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:41,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:41,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-16 19:26:41,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236651730] [2022-11-16 19:26:41,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:41,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 19:26:41,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:41,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 19:26:41,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-16 19:26:41,373 INFO L87 Difference]: Start difference. First operand 236 states and 645 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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) [2022-11-16 19:26:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:43,059 INFO L93 Difference]: Finished difference Result 546 states and 1341 transitions. [2022-11-16 19:26:43,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 19:26:43,059 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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 18 [2022-11-16 19:26:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:43,062 INFO L225 Difference]: With dead ends: 546 [2022-11-16 19:26:43,062 INFO L226 Difference]: Without dead ends: 546 [2022-11-16 19:26:43,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=1351, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 19:26:43,063 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 193 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:43,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 9 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 19:26:43,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-11-16 19:26:43,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 252. [2022-11-16 19:26:43,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.729083665338645) internal successors, (685), 251 states have internal predecessors, (685), 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) [2022-11-16 19:26:43,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 685 transitions. [2022-11-16 19:26:43,074 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 685 transitions. Word has length 18 [2022-11-16 19:26:43,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:43,074 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 685 transitions. [2022-11-16 19:26:43,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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) [2022-11-16 19:26:43,075 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 685 transitions. [2022-11-16 19:26:43,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:26:43,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:43,076 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:43,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:43,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:43,281 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:43,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:43,281 INFO L85 PathProgramCache]: Analyzing trace with hash -586205104, now seen corresponding path program 19 times [2022-11-16 19:26:43,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:43,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124154635] [2022-11-16 19:26:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:43,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:43,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:43,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124154635] [2022-11-16 19:26:43,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124154635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:43,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822346632] [2022-11-16 19:26:43,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:26:43,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:43,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:43,592 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:43,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 19:26:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:43,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:26:43,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:43,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:43,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822346632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:43,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1347199688] [2022-11-16 19:26:43,948 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:43,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:43,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-11-16 19:26:43,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425242351] [2022-11-16 19:26:43,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:43,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 19:26:43,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:43,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 19:26:43,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:26:43,950 INFO L87 Difference]: Start difference. First operand 252 states and 685 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 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) [2022-11-16 19:26:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:46,805 INFO L93 Difference]: Finished difference Result 694 states and 1602 transitions. [2022-11-16 19:26:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 19:26:46,806 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 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 18 [2022-11-16 19:26:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:46,809 INFO L225 Difference]: With dead ends: 694 [2022-11-16 19:26:46,809 INFO L226 Difference]: Without dead ends: 682 [2022-11-16 19:26:46,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=493, Invalid=1577, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 19:26:46,811 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 255 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:46,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 8 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 19:26:46,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-11-16 19:26:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 258. [2022-11-16 19:26:46,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.7587548638132295) internal successors, (709), 257 states have internal predecessors, (709), 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) [2022-11-16 19:26:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 709 transitions. [2022-11-16 19:26:46,826 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 709 transitions. Word has length 18 [2022-11-16 19:26:46,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:46,826 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 709 transitions. [2022-11-16 19:26:46,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 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) [2022-11-16 19:26:46,827 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 709 transitions. [2022-11-16 19:26:46,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:26:46,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:46,828 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:46,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:47,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-16 19:26:47,033 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:47,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:47,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1356304802, now seen corresponding path program 20 times [2022-11-16 19:26:47,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:47,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91657943] [2022-11-16 19:26:47,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:47,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:47,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:47,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91657943] [2022-11-16 19:26:47,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91657943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:47,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70038841] [2022-11-16 19:26:47,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:26:47,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:47,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:47,307 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:47,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 19:26:47,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 19:26:47,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:26:47,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:26:47,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:47,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:47,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70038841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:47,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1303512568] [2022-11-16 19:26:47,691 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:47,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:47,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-11-16 19:26:47,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594529668] [2022-11-16 19:26:47,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:47,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 19:26:47,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:47,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 19:26:47,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:26:47,693 INFO L87 Difference]: Start difference. First operand 258 states and 709 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:26:52,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:26:53,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:53,758 INFO L93 Difference]: Finished difference Result 560 states and 1367 transitions. [2022-11-16 19:26:53,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-16 19:26:53,759 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 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 18 [2022-11-16 19:26:53,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:53,762 INFO L225 Difference]: With dead ends: 560 [2022-11-16 19:26:53,763 INFO L226 Difference]: Without dead ends: 554 [2022-11-16 19:26:53,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=722, Invalid=2938, Unknown=0, NotChecked=0, Total=3660 [2022-11-16 19:26:53,764 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 196 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:53,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 9 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 879 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-11-16 19:26:53,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-11-16 19:26:53,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 218. [2022-11-16 19:26:53,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.6589861751152073) internal successors, (577), 217 states have internal predecessors, (577), 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) [2022-11-16 19:26:53,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 577 transitions. [2022-11-16 19:26:53,777 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 577 transitions. Word has length 18 [2022-11-16 19:26:53,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:53,777 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 577 transitions. [2022-11-16 19:26:53,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 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) [2022-11-16 19:26:53,777 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 577 transitions. [2022-11-16 19:26:53,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:26:53,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:53,778 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:53,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:53,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:53,984 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:53,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:53,985 INFO L85 PathProgramCache]: Analyzing trace with hash 269101550, now seen corresponding path program 21 times [2022-11-16 19:26:53,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:53,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985645630] [2022-11-16 19:26:53,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:53,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:54,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:54,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985645630] [2022-11-16 19:26:54,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985645630] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:54,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746963231] [2022-11-16 19:26:54,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:26:54,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:54,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:54,172 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:54,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 19:26:54,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:26:54,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:26:54,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:26:54,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:54,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:54,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746963231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:54,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1140511535] [2022-11-16 19:26:54,537 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:54,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:54,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-16 19:26:54,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702681989] [2022-11-16 19:26:54,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:54,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 19:26:54,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:54,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 19:26:54,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:26:54,541 INFO L87 Difference]: Start difference. First operand 218 states and 577 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 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) [2022-11-16 19:26:57,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:26:57,817 INFO L93 Difference]: Finished difference Result 478 states and 1176 transitions. [2022-11-16 19:26:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 19:26:57,818 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 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 18 [2022-11-16 19:26:57,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:26:57,822 INFO L225 Difference]: With dead ends: 478 [2022-11-16 19:26:57,822 INFO L226 Difference]: Without dead ends: 450 [2022-11-16 19:26:57,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=293, Invalid=1113, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 19:26:57,823 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 136 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:26:57,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 13 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 19:26:57,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-11-16 19:26:57,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 226. [2022-11-16 19:26:57,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.6977777777777776) internal successors, (607), 225 states have internal predecessors, (607), 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) [2022-11-16 19:26:57,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 607 transitions. [2022-11-16 19:26:57,836 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 607 transitions. Word has length 18 [2022-11-16 19:26:57,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:26:57,837 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 607 transitions. [2022-11-16 19:26:57,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 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) [2022-11-16 19:26:57,837 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 607 transitions. [2022-11-16 19:26:57,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:26:57,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:26:57,838 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:26:57,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 19:26:58,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:58,044 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:26:58,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:26:58,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1013804048, now seen corresponding path program 22 times [2022-11-16 19:26:58,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:26:58,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266298735] [2022-11-16 19:26:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:26:58,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:26:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:58,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:26:58,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266298735] [2022-11-16 19:26:58,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266298735] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:26:58,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552762010] [2022-11-16 19:26:58,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:26:58,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:26:58,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:26:58,238 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:26:58,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 19:26:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:26:58,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:26:58,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:26:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:58,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:26:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:26:58,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552762010] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:26:58,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [722752846] [2022-11-16 19:26:58,590 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:26:58,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:26:58,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-16 19:26:58,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711652371] [2022-11-16 19:26:58,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:26:58,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 19:26:58,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:26:58,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 19:26:58,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-11-16 19:26:58,592 INFO L87 Difference]: Start difference. First operand 226 states and 607 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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) [2022-11-16 19:27:00,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:00,120 INFO L93 Difference]: Finished difference Result 466 states and 1149 transitions. [2022-11-16 19:27:00,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 19:27:00,121 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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 18 [2022-11-16 19:27:00,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:00,123 INFO L225 Difference]: With dead ends: 466 [2022-11-16 19:27:00,123 INFO L226 Difference]: Without dead ends: 466 [2022-11-16 19:27:00,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=291, Invalid=1349, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 19:27:00,124 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 193 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:00,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 11 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 19:27:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-11-16 19:27:00,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 216. [2022-11-16 19:27:00,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.66046511627907) internal successors, (572), 215 states have internal predecessors, (572), 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) [2022-11-16 19:27:00,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 572 transitions. [2022-11-16 19:27:00,134 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 572 transitions. Word has length 18 [2022-11-16 19:27:00,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:00,135 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 572 transitions. [2022-11-16 19:27:00,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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) [2022-11-16 19:27:00,135 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 572 transitions. [2022-11-16 19:27:00,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 19:27:00,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:00,136 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:00,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 19:27:00,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 19:27:00,342 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:27:00,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:00,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1105712331, now seen corresponding path program 23 times [2022-11-16 19:27:00,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:00,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795373969] [2022-11-16 19:27:00,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:00,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:27:00,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:00,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795373969] [2022-11-16 19:27:00,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795373969] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:27:00,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094248133] [2022-11-16 19:27:00,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:27:00,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:00,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:27:00,573 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:27:00,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 19:27:00,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:27:00,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:27:00,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 19:27:00,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:27:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:27:00,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:27:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:27:00,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094248133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:27:00,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [189236154] [2022-11-16 19:27:00,906 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:27:00,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:27:00,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-11-16 19:27:00,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899371488] [2022-11-16 19:27:00,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:27:00,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 19:27:00,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:00,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 19:27:00,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:27:00,908 INFO L87 Difference]: Start difference. First operand 216 states and 572 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 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) [2022-11-16 19:27:01,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:01,120 INFO L93 Difference]: Finished difference Result 351 states and 900 transitions. [2022-11-16 19:27:01,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:27:01,121 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 19:27:01,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:01,123 INFO L225 Difference]: With dead ends: 351 [2022-11-16 19:27:01,123 INFO L226 Difference]: Without dead ends: 324 [2022-11-16 19:27:01,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:27:01,124 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 47 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:01,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 28 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:27:01,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-11-16 19:27:01,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 280. [2022-11-16 19:27:01,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.7204301075268815) internal successors, (759), 279 states have internal predecessors, (759), 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) [2022-11-16 19:27:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 759 transitions. [2022-11-16 19:27:01,132 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 759 transitions. Word has length 19 [2022-11-16 19:27:01,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:01,132 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 759 transitions. [2022-11-16 19:27:01,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 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) [2022-11-16 19:27:01,132 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 759 transitions. [2022-11-16 19:27:01,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:27:01,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:01,134 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:01,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 19:27:01,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-16 19:27:01,340 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:27:01,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:01,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1676850509, now seen corresponding path program 24 times [2022-11-16 19:27:01,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:01,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68998711] [2022-11-16 19:27:01,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:01,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:27:01,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:01,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68998711] [2022-11-16 19:27:01,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68998711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:27:01,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290002569] [2022-11-16 19:27:01,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:27:01,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:01,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:27:01,596 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:27:01,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 19:27:01,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:27:01,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:27:01,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:27:01,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:27:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:27:01,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:27:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:27:02,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290002569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:27:02,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [793960464] [2022-11-16 19:27:02,005 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:27:02,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:27:02,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-11-16 19:27:02,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209150684] [2022-11-16 19:27:02,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:27:02,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 19:27:02,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:02,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 19:27:02,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-11-16 19:27:02,006 INFO L87 Difference]: Start difference. First operand 280 states and 759 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 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) [2022-11-16 19:27:03,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:03,660 INFO L93 Difference]: Finished difference Result 854 states and 2270 transitions. [2022-11-16 19:27:03,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 19:27:03,660 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 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 20 [2022-11-16 19:27:03,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:03,665 INFO L225 Difference]: With dead ends: 854 [2022-11-16 19:27:03,665 INFO L226 Difference]: Without dead ends: 854 [2022-11-16 19:27:03,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=295, Invalid=1187, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 19:27:03,666 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 391 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:03,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 41 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 19:27:03,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-11-16 19:27:03,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 294. [2022-11-16 19:27:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.733788395904437) internal successors, (801), 293 states have internal predecessors, (801), 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) [2022-11-16 19:27:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 801 transitions. [2022-11-16 19:27:03,708 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 801 transitions. Word has length 20 [2022-11-16 19:27:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:03,709 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 801 transitions. [2022-11-16 19:27:03,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 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) [2022-11-16 19:27:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 801 transitions. [2022-11-16 19:27:03,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:27:03,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:03,718 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:03,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 19:27:03,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:03,919 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:27:03,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:03,920 INFO L85 PathProgramCache]: Analyzing trace with hash -322705097, now seen corresponding path program 25 times [2022-11-16 19:27:03,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:03,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124593266] [2022-11-16 19:27:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:03,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:27:04,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:04,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124593266] [2022-11-16 19:27:04,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124593266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:27:04,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685453140] [2022-11-16 19:27:04,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:27:04,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:04,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:27:04,175 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:27:04,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 19:27:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:04,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:27:04,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:27:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:27:04,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:27:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:27:04,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685453140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:27:04,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [800941996] [2022-11-16 19:27:04,691 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:27:04,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:27:04,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-16 19:27:04,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459343367] [2022-11-16 19:27:04,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:27:04,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 19:27:04,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:04,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 19:27:04,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-11-16 19:27:04,693 INFO L87 Difference]: Start difference. First operand 294 states and 801 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 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) [2022-11-16 19:27:34,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:27:34,763 INFO L93 Difference]: Finished difference Result 2182 states and 5236 transitions. [2022-11-16 19:27:34,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-16 19:27:34,764 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 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 20 [2022-11-16 19:27:34,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:27:34,773 INFO L225 Difference]: With dead ends: 2182 [2022-11-16 19:27:34,773 INFO L226 Difference]: Without dead ends: 2166 [2022-11-16 19:27:34,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3922 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=2108, Invalid=8604, Unknown=0, NotChecked=0, Total=10712 [2022-11-16 19:27:34,776 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 732 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:27:34,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 34 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-16 19:27:34,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2022-11-16 19:27:34,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 408. [2022-11-16 19:27:34,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.914004914004914) internal successors, (1186), 407 states have internal predecessors, (1186), 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) [2022-11-16 19:27:34,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1186 transitions. [2022-11-16 19:27:34,806 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1186 transitions. Word has length 20 [2022-11-16 19:27:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:27:34,807 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 1186 transitions. [2022-11-16 19:27:34,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 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) [2022-11-16 19:27:34,807 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1186 transitions. [2022-11-16 19:27:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:27:34,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:27:34,809 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:27:34,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-16 19:27:35,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-16 19:27:35,014 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:27:35,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:27:35,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1092804795, now seen corresponding path program 26 times [2022-11-16 19:27:35,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:27:35,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745535512] [2022-11-16 19:27:35,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:27:35,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:27:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:27:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:27:35,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:27:35,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745535512] [2022-11-16 19:27:35,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745535512] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:27:35,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014480615] [2022-11-16 19:27:35,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:27:35,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:27:35,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:27:35,235 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:27:35,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 19:27:35,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 19:27:35,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:27:35,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:27:35,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:27:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:27:35,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:27:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:27:35,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014480615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:27:35,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [732616294] [2022-11-16 19:27:35,736 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:27:35,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:27:35,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-16 19:27:35,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372104190] [2022-11-16 19:27:35,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:27:35,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 19:27:35,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:27:35,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 19:27:35,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-11-16 19:27:35,738 INFO L87 Difference]: Start difference. First operand 408 states and 1186 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:28:22,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:28:27,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:27,569 INFO L93 Difference]: Finished difference Result 1770 states and 4436 transitions. [2022-11-16 19:28:27,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-11-16 19:28:27,570 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 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 20 [2022-11-16 19:28:27,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:27,575 INFO L225 Difference]: With dead ends: 1770 [2022-11-16 19:28:27,575 INFO L226 Difference]: Without dead ends: 1760 [2022-11-16 19:28:27,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5583 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=2521, Invalid=11995, Unknown=4, NotChecked=0, Total=14520 [2022-11-16 19:28:27,579 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 694 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 161 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:27,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 46 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1430 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2022-11-16 19:28:27,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2022-11-16 19:28:27,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 436. [2022-11-16 19:28:27,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.9655172413793105) internal successors, (1290), 435 states have internal predecessors, (1290), 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) [2022-11-16 19:28:27,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1290 transitions. [2022-11-16 19:28:27,609 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1290 transitions. Word has length 20 [2022-11-16 19:28:27,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:27,610 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 1290 transitions. [2022-11-16 19:28:27,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 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) [2022-11-16 19:28:27,610 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1290 transitions. [2022-11-16 19:28:27,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:28:27,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:27,612 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:27,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-16 19:28:27,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-16 19:28:27,819 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:28:27,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:27,820 INFO L85 PathProgramCache]: Analyzing trace with hash 532601557, now seen corresponding path program 27 times [2022-11-16 19:28:27,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:27,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006349923] [2022-11-16 19:28:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:27,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:28,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:28,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006349923] [2022-11-16 19:28:28,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006349923] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:28,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758700561] [2022-11-16 19:28:28,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:28:28,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:28,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:28,096 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:28,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-16 19:28:28,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:28:28,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:28:28,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:28:28,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:28:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:28,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:28:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:28,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758700561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:28:28,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1265238148] [2022-11-16 19:28:28,566 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:28:28,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:28:28,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-11-16 19:28:28,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32268919] [2022-11-16 19:28:28,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:28:28,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 19:28:28,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:28,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 19:28:28,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-11-16 19:28:28,568 INFO L87 Difference]: Start difference. First operand 436 states and 1290 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 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) [2022-11-16 19:28:41,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:41,163 INFO L93 Difference]: Finished difference Result 1792 states and 4616 transitions. [2022-11-16 19:28:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-16 19:28:41,164 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 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 20 [2022-11-16 19:28:41,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:41,170 INFO L225 Difference]: With dead ends: 1792 [2022-11-16 19:28:41,170 INFO L226 Difference]: Without dead ends: 1720 [2022-11-16 19:28:41,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1419, Invalid=6063, Unknown=0, NotChecked=0, Total=7482 [2022-11-16 19:28:41,171 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 479 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:41,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 30 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1254 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-16 19:28:41,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2022-11-16 19:28:41,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 472. [2022-11-16 19:28:41,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.997876857749469) internal successors, (1412), 471 states have internal predecessors, (1412), 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) [2022-11-16 19:28:41,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1412 transitions. [2022-11-16 19:28:41,194 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1412 transitions. Word has length 20 [2022-11-16 19:28:41,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:41,195 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 1412 transitions. [2022-11-16 19:28:41,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 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) [2022-11-16 19:28:41,195 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1412 transitions. [2022-11-16 19:28:41,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:28:41,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:41,197 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:41,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-16 19:28:41,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-16 19:28:41,402 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:28:41,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:41,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1277304055, now seen corresponding path program 28 times [2022-11-16 19:28:41,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:41,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477423637] [2022-11-16 19:28:41,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:41,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:41,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:41,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477423637] [2022-11-16 19:28:41,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477423637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:41,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96309676] [2022-11-16 19:28:41,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:28:41,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:41,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:41,614 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:41,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-16 19:28:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:41,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:28:41,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:28:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:41,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:28:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:42,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96309676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:28:42,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [972958351] [2022-11-16 19:28:42,063 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:28:42,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:28:42,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-16 19:28:42,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357306213] [2022-11-16 19:28:42,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:28:42,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 19:28:42,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:42,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 19:28:42,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:28:42,065 INFO L87 Difference]: Start difference. First operand 472 states and 1412 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 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) [2022-11-16 19:28:54,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:54,304 INFO L93 Difference]: Finished difference Result 1554 states and 4205 transitions. [2022-11-16 19:28:54,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-16 19:28:54,305 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 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 20 [2022-11-16 19:28:54,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:54,312 INFO L225 Difference]: With dead ends: 1554 [2022-11-16 19:28:54,312 INFO L226 Difference]: Without dead ends: 1506 [2022-11-16 19:28:54,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1070, Invalid=4630, Unknown=0, NotChecked=0, Total=5700 [2022-11-16 19:28:54,314 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 396 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:54,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 32 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 19:28:54,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-11-16 19:28:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 474. [2022-11-16 19:28:54,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.004228329809725) internal successors, (1421), 473 states have internal predecessors, (1421), 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) [2022-11-16 19:28:54,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1421 transitions. [2022-11-16 19:28:54,338 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1421 transitions. Word has length 20 [2022-11-16 19:28:54,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:54,338 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 1421 transitions. [2022-11-16 19:28:54,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 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) [2022-11-16 19:28:54,338 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1421 transitions. [2022-11-16 19:28:54,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:28:54,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:54,340 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:54,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-16 19:28:54,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 19:28:54,546 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:28:54,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:54,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1406722283, now seen corresponding path program 29 times [2022-11-16 19:28:54,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:54,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256923034] [2022-11-16 19:28:54,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:54,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:54,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:54,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256923034] [2022-11-16 19:28:54,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256923034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:54,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228111152] [2022-11-16 19:28:54,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:28:54,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:54,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:54,817 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:54,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-16 19:28:54,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:28:54,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:28:54,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:28:54,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:28:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:55,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:28:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:55,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228111152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:28:55,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [445372929] [2022-11-16 19:28:55,274 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:28:55,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:28:55,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-11-16 19:28:55,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929975265] [2022-11-16 19:28:55,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:28:55,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 19:28:55,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:55,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 19:28:55,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:28:55,279 INFO L87 Difference]: Start difference. First operand 474 states and 1421 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 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) [2022-11-16 19:28:58,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:58,950 INFO L93 Difference]: Finished difference Result 1488 states and 4119 transitions. [2022-11-16 19:28:58,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-16 19:28:58,951 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 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 20 [2022-11-16 19:28:58,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:58,956 INFO L225 Difference]: With dead ends: 1488 [2022-11-16 19:28:58,957 INFO L226 Difference]: Without dead ends: 1488 [2022-11-16 19:28:58,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=787, Invalid=4043, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 19:28:58,958 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 357 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:58,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 37 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 19:28:58,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2022-11-16 19:28:58,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 482. [2022-11-16 19:28:58,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.008316008316008) internal successors, (1447), 481 states have internal predecessors, (1447), 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) [2022-11-16 19:28:58,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1447 transitions. [2022-11-16 19:28:58,981 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1447 transitions. Word has length 20 [2022-11-16 19:28:58,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:58,981 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 1447 transitions. [2022-11-16 19:28:58,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 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) [2022-11-16 19:28:58,981 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1447 transitions. [2022-11-16 19:28:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:28:58,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:58,983 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:58,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-16 19:28:59,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-16 19:28:59,189 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:28:59,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:59,189 INFO L85 PathProgramCache]: Analyzing trace with hash -579377587, now seen corresponding path program 30 times [2022-11-16 19:28:59,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:59,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151845895] [2022-11-16 19:28:59,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:59,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:59,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:59,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151845895] [2022-11-16 19:28:59,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151845895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:59,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215612525] [2022-11-16 19:28:59,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:28:59,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:59,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:59,397 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:59,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-16 19:28:59,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:28:59,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:28:59,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:28:59,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:28:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:59,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:28:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:59,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215612525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:28:59,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1984083385] [2022-11-16 19:28:59,910 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:28:59,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:28:59,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 22 [2022-11-16 19:28:59,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296454530] [2022-11-16 19:28:59,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:28:59,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 19:28:59,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:59,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 19:28:59,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-11-16 19:28:59,912 INFO L87 Difference]: Start difference. First operand 482 states and 1447 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:29:04,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:29:14,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:29:14,688 INFO L93 Difference]: Finished difference Result 1528 states and 3916 transitions. [2022-11-16 19:29:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-16 19:29:14,688 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 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 20 [2022-11-16 19:29:14,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:29:14,692 INFO L225 Difference]: With dead ends: 1528 [2022-11-16 19:29:14,692 INFO L226 Difference]: Without dead ends: 1460 [2022-11-16 19:29:14,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=938, Invalid=4318, Unknown=0, NotChecked=0, Total=5256 [2022-11-16 19:29:14,693 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 293 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 74 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:29:14,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 23 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1090 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-11-16 19:29:14,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2022-11-16 19:29:14,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 554. [2022-11-16 19:29:14,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.949367088607595) internal successors, (1631), 553 states have internal predecessors, (1631), 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) [2022-11-16 19:29:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1631 transitions. [2022-11-16 19:29:14,715 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1631 transitions. Word has length 20 [2022-11-16 19:29:14,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:29:14,716 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 1631 transitions. [2022-11-16 19:29:14,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 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) [2022-11-16 19:29:14,716 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1631 transitions. [2022-11-16 19:29:14,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:29:14,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:29:14,718 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:29:14,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-16 19:29:14,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-16 19:29:14,924 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:29:14,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:29:14,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1776265869, now seen corresponding path program 31 times [2022-11-16 19:29:14,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:29:14,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535789958] [2022-11-16 19:29:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:14,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:29:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:29:15,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:29:15,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535789958] [2022-11-16 19:29:15,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535789958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:29:15,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939220710] [2022-11-16 19:29:15,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:29:15,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:15,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:29:15,210 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:29:15,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 19:29:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:15,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:29:15,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:29:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:29:15,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:29:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:29:15,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939220710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:29:15,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1810935784] [2022-11-16 19:29:15,737 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:29:15,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:29:15,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-11-16 19:29:15,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581697039] [2022-11-16 19:29:15,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:29:15,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 19:29:15,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:29:15,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 19:29:15,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-11-16 19:29:15,739 INFO L87 Difference]: Start difference. First operand 554 states and 1631 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 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) [2022-11-16 19:29:33,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:29:33,965 INFO L93 Difference]: Finished difference Result 1642 states and 4225 transitions. [2022-11-16 19:29:33,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-16 19:29:33,966 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 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 20 [2022-11-16 19:29:33,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:29:33,971 INFO L225 Difference]: With dead ends: 1642 [2022-11-16 19:29:33,971 INFO L226 Difference]: Without dead ends: 1586 [2022-11-16 19:29:33,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=1307, Invalid=7248, Unknown=1, NotChecked=0, Total=8556 [2022-11-16 19:29:33,973 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 355 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:29:33,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 20 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-16 19:29:33,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2022-11-16 19:29:33,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 566. [2022-11-16 19:29:33,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 2.961061946902655) internal successors, (1673), 565 states have internal predecessors, (1673), 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) [2022-11-16 19:29:33,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 1673 transitions. [2022-11-16 19:29:33,997 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 1673 transitions. Word has length 20 [2022-11-16 19:29:33,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:29:33,997 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 1673 transitions. [2022-11-16 19:29:33,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 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) [2022-11-16 19:29:33,998 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 1673 transitions. [2022-11-16 19:29:33,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:29:34,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:29:34,000 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:29:34,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-16 19:29:34,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:34,206 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:29:34,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:29:34,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1786768973, now seen corresponding path program 32 times [2022-11-16 19:29:34,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:29:34,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448447096] [2022-11-16 19:29:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:34,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:29:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:29:34,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:29:34,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448447096] [2022-11-16 19:29:34,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448447096] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:29:34,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113557061] [2022-11-16 19:29:34,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:29:34,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:34,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:29:34,471 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:29:34,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-16 19:29:34,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:29:34,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:29:34,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:29:34,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:29:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:29:34,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:29:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:29:34,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113557061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:29:34,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [29845442] [2022-11-16 19:29:34,933 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:29:34,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:29:34,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-11-16 19:29:34,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195296301] [2022-11-16 19:29:34,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:29:34,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 19:29:34,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:29:34,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 19:29:34,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:29:34,935 INFO L87 Difference]: Start difference. First operand 566 states and 1673 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 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) [2022-11-16 19:29:43,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:29:43,449 INFO L93 Difference]: Finished difference Result 1628 states and 4317 transitions. [2022-11-16 19:29:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-16 19:29:43,450 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 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 20 [2022-11-16 19:29:43,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:29:43,454 INFO L225 Difference]: With dead ends: 1628 [2022-11-16 19:29:43,454 INFO L226 Difference]: Without dead ends: 1628 [2022-11-16 19:29:43,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2796 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1298, Invalid=7258, Unknown=0, NotChecked=0, Total=8556 [2022-11-16 19:29:43,456 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 321 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1457 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:29:43,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 25 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1457 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-16 19:29:43,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2022-11-16 19:29:43,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 604. [2022-11-16 19:29:43,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 2.9718076285240462) internal successors, (1792), 603 states have internal predecessors, (1792), 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) [2022-11-16 19:29:43,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1792 transitions. [2022-11-16 19:29:43,482 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1792 transitions. Word has length 20 [2022-11-16 19:29:43,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:29:43,482 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 1792 transitions. [2022-11-16 19:29:43,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 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) [2022-11-16 19:29:43,483 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1792 transitions. [2022-11-16 19:29:43,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:29:43,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:29:43,485 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:29:43,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-16 19:29:43,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:43,691 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:29:43,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:29:43,691 INFO L85 PathProgramCache]: Analyzing trace with hash 64212919, now seen corresponding path program 33 times [2022-11-16 19:29:43,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:29:43,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203935533] [2022-11-16 19:29:43,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:43,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:29:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:29:43,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:29:43,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203935533] [2022-11-16 19:29:43,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203935533] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:29:43,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564200246] [2022-11-16 19:29:43,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:29:43,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:43,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:29:43,931 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:29:43,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-16 19:29:44,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:29:44,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:29:44,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:29:44,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:29:44,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:29:44,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:29:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:29:44,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564200246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:29:44,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [645259794] [2022-11-16 19:29:44,515 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:29:44,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:29:44,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-16 19:29:44,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473365797] [2022-11-16 19:29:44,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:29:44,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 19:29:44,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:29:44,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 19:29:44,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-11-16 19:29:44,517 INFO L87 Difference]: Start difference. First operand 604 states and 1792 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:29:48,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:29:54,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:29:54,579 INFO L93 Difference]: Finished difference Result 1636 states and 4339 transitions. [2022-11-16 19:29:54,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-16 19:29:54,580 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 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 20 [2022-11-16 19:29:54,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:29:54,584 INFO L225 Difference]: With dead ends: 1636 [2022-11-16 19:29:54,584 INFO L226 Difference]: Without dead ends: 1564 [2022-11-16 19:29:54,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2044 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=911, Invalid=5569, Unknown=0, NotChecked=0, Total=6480 [2022-11-16 19:29:54,585 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 365 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:29:54,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 15 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1536 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-11-16 19:29:54,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2022-11-16 19:29:54,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 740. [2022-11-16 19:29:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.952638700947226) internal successors, (2182), 739 states have internal predecessors, (2182), 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) [2022-11-16 19:29:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2182 transitions. [2022-11-16 19:29:54,610 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2182 transitions. Word has length 20 [2022-11-16 19:29:54,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:29:54,610 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 2182 transitions. [2022-11-16 19:29:54,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 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) [2022-11-16 19:29:54,610 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2182 transitions. [2022-11-16 19:29:54,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:29:54,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:29:54,613 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:29:54,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-16 19:29:54,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-16 19:29:54,819 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:29:54,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:29:54,819 INFO L85 PathProgramCache]: Analyzing trace with hash 389809143, now seen corresponding path program 34 times [2022-11-16 19:29:54,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:29:54,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174636003] [2022-11-16 19:29:54,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:54,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:29:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:29:55,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:29:55,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174636003] [2022-11-16 19:29:55,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174636003] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:29:55,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312374586] [2022-11-16 19:29:55,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:29:55,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:55,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:29:55,074 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:29:55,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-16 19:29:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:55,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:29:55,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:29:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:29:55,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:29:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:29:55,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312374586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:29:55,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1771195500] [2022-11-16 19:29:55,605 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:29:55,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:29:55,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-16 19:29:55,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308921218] [2022-11-16 19:29:55,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:29:55,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 19:29:55,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:29:55,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 19:29:55,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:29:55,608 INFO L87 Difference]: Start difference. First operand 740 states and 2182 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:30:03,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:30:11,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:30:15,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:30:15,658 INFO L93 Difference]: Finished difference Result 1394 states and 3766 transitions. [2022-11-16 19:30:15,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-16 19:30:15,658 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 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 20 [2022-11-16 19:30:15,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:30:15,662 INFO L225 Difference]: With dead ends: 1394 [2022-11-16 19:30:15,662 INFO L226 Difference]: Without dead ends: 1338 [2022-11-16 19:30:15,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=759, Invalid=3401, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 19:30:15,664 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 278 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 32 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:30:15,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 16 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1231 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2022-11-16 19:30:15,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2022-11-16 19:30:15,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 790. [2022-11-16 19:30:15,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 2.964512040557668) internal successors, (2339), 789 states have internal predecessors, (2339), 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) [2022-11-16 19:30:15,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 2339 transitions. [2022-11-16 19:30:15,689 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 2339 transitions. Word has length 20 [2022-11-16 19:30:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:30:15,689 INFO L495 AbstractCegarLoop]: Abstraction has 790 states and 2339 transitions. [2022-11-16 19:30:15,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 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) [2022-11-16 19:30:15,690 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 2339 transitions. [2022-11-16 19:30:15,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:30:15,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:30:15,693 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:30:15,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-16 19:30:15,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-16 19:30:15,899 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:30:15,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:30:15,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2000750101, now seen corresponding path program 35 times [2022-11-16 19:30:15,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:30:15,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246760698] [2022-11-16 19:30:15,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:30:15,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:30:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:30:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:30:16,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:30:16,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246760698] [2022-11-16 19:30:16,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246760698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:30:16,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67138327] [2022-11-16 19:30:16,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:30:16,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:30:16,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:30:16,161 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:30:16,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-16 19:30:16,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:30:16,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:30:16,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:30:16,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:30:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:30:16,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:30:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:30:16,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67138327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:30:16,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1735927206] [2022-11-16 19:30:16,613 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:30:16,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:30:16,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-11-16 19:30:16,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319178551] [2022-11-16 19:30:16,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:30:16,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 19:30:16,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:30:16,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 19:30:16,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:30:16,616 INFO L87 Difference]: Start difference. First operand 790 states and 2339 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 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) [2022-11-16 19:30:22,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:30:22,037 INFO L93 Difference]: Finished difference Result 1472 states and 3951 transitions. [2022-11-16 19:30:22,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-16 19:30:22,038 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 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 20 [2022-11-16 19:30:22,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:30:22,042 INFO L225 Difference]: With dead ends: 1472 [2022-11-16 19:30:22,042 INFO L226 Difference]: Without dead ends: 1472 [2022-11-16 19:30:22,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=790, Invalid=4612, Unknown=0, NotChecked=0, Total=5402 [2022-11-16 19:30:22,044 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 367 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:30:22,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 16 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-16 19:30:22,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2022-11-16 19:30:22,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 810. [2022-11-16 19:30:22,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 2.9641532756489495) internal successors, (2398), 809 states have internal predecessors, (2398), 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) [2022-11-16 19:30:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2398 transitions. [2022-11-16 19:30:22,072 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2398 transitions. Word has length 20 [2022-11-16 19:30:22,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:30:22,073 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 2398 transitions. [2022-11-16 19:30:22,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 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) [2022-11-16 19:30:22,073 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2398 transitions. [2022-11-16 19:30:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:30:22,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:30:22,076 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:30:22,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-16 19:30:22,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:30:22,282 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:30:22,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:30:22,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1983554317, now seen corresponding path program 36 times [2022-11-16 19:30:22,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:30:22,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751571923] [2022-11-16 19:30:22,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:30:22,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:30:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:30:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:30:22,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:30:22,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751571923] [2022-11-16 19:30:22,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751571923] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:30:22,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923828778] [2022-11-16 19:30:22,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:30:22,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:30:22,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:30:22,511 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:30:22,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-16 19:30:22,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:30:22,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:30:22,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:30:22,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:30:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:30:22,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:30:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:30:23,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923828778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:30:23,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [154499179] [2022-11-16 19:30:23,031 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:30:23,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:30:23,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-11-16 19:30:23,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535673030] [2022-11-16 19:30:23,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:30:23,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 19:30:23,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:30:23,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 19:30:23,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-11-16 19:30:23,034 INFO L87 Difference]: Start difference. First operand 810 states and 2398 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:30:28,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:30:33,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:30:40,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:30:41,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:30:41,202 INFO L93 Difference]: Finished difference Result 1740 states and 4711 transitions. [2022-11-16 19:30:41,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-16 19:30:41,203 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 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 20 [2022-11-16 19:30:41,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:30:41,208 INFO L225 Difference]: With dead ends: 1740 [2022-11-16 19:30:41,208 INFO L226 Difference]: Without dead ends: 1684 [2022-11-16 19:30:41,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=897, Invalid=3659, Unknown=0, NotChecked=0, Total=4556 [2022-11-16 19:30:41,209 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 289 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 77 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:30:41,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 8 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1151 Invalid, 2 Unknown, 0 Unchecked, 8.5s Time] [2022-11-16 19:30:41,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2022-11-16 19:30:41,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 842. [2022-11-16 19:30:41,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.9678953626634956) internal successors, (2496), 841 states have internal predecessors, (2496), 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) [2022-11-16 19:30:41,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2496 transitions. [2022-11-16 19:30:41,239 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2496 transitions. Word has length 20 [2022-11-16 19:30:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:30:41,239 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 2496 transitions. [2022-11-16 19:30:41,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 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) [2022-11-16 19:30:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2496 transitions. [2022-11-16 19:30:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:30:41,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:30:41,242 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:30:41,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-16 19:30:41,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:30:41,448 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:30:41,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:30:41,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1566710481, now seen corresponding path program 37 times [2022-11-16 19:30:41,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:30:41,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223492880] [2022-11-16 19:30:41,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:30:41,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:30:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:30:41,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:30:41,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:30:41,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223492880] [2022-11-16 19:30:41,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223492880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:30:41,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570835725] [2022-11-16 19:30:41,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:30:41,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:30:41,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:30:41,701 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:30:41,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-16 19:30:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:30:41,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:30:41,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:30:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:30:41,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:30:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:30:42,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570835725] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:30:42,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1648052408] [2022-11-16 19:30:42,202 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:30:42,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:30:42,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-16 19:30:42,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278963026] [2022-11-16 19:30:42,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:30:42,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 19:30:42,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:30:42,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 19:30:42,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:30:42,205 INFO L87 Difference]: Start difference. First operand 842 states and 2496 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:30:48,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:30:55,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:30:55,083 INFO L93 Difference]: Finished difference Result 1504 states and 4087 transitions. [2022-11-16 19:30:55,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-16 19:30:55,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 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 20 [2022-11-16 19:30:55,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:30:55,088 INFO L225 Difference]: With dead ends: 1504 [2022-11-16 19:30:55,088 INFO L226 Difference]: Without dead ends: 1448 [2022-11-16 19:30:55,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=650, Invalid=3010, Unknown=0, NotChecked=0, Total=3660 [2022-11-16 19:30:55,089 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 275 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:30:55,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 9 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 999 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2022-11-16 19:30:55,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2022-11-16 19:30:55,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 882. [2022-11-16 19:30:55,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 2.978433598183882) internal successors, (2624), 881 states have internal predecessors, (2624), 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) [2022-11-16 19:30:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2624 transitions. [2022-11-16 19:30:55,116 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2624 transitions. Word has length 20 [2022-11-16 19:30:55,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:30:55,116 INFO L495 AbstractCegarLoop]: Abstraction has 882 states and 2624 transitions. [2022-11-16 19:30:55,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 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) [2022-11-16 19:30:55,117 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2624 transitions. [2022-11-16 19:30:55,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:30:55,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:30:55,119 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:30:55,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-16 19:30:55,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-16 19:30:55,325 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:30:55,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:30:55,326 INFO L85 PathProgramCache]: Analyzing trace with hash 44230477, now seen corresponding path program 38 times [2022-11-16 19:30:55,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:30:55,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753300863] [2022-11-16 19:30:55,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:30:55,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:30:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:30:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:30:55,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:30:55,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753300863] [2022-11-16 19:30:55,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753300863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:30:55,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522134300] [2022-11-16 19:30:55,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:30:55,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:30:55,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:30:55,608 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:30:55,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-16 19:30:55,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:30:55,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:30:55,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:30:55,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:30:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:30:55,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:30:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:30:56,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522134300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:30:56,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1909093838] [2022-11-16 19:30:56,093 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:30:56,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:30:56,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-11-16 19:30:56,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106146698] [2022-11-16 19:30:56,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:30:56,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 19:30:56,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:30:56,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 19:30:56,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:30:56,095 INFO L87 Difference]: Start difference. First operand 882 states and 2624 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 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) [2022-11-16 19:31:01,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:31:01,517 INFO L93 Difference]: Finished difference Result 1600 states and 4339 transitions. [2022-11-16 19:31:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-16 19:31:01,517 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 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 20 [2022-11-16 19:31:01,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:31:01,522 INFO L225 Difference]: With dead ends: 1600 [2022-11-16 19:31:01,522 INFO L226 Difference]: Without dead ends: 1600 [2022-11-16 19:31:01,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=700, Invalid=4130, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 19:31:01,523 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 323 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:31:01,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 12 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-16 19:31:01,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2022-11-16 19:31:01,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 900. [2022-11-16 19:31:01,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.9710789766407117) internal successors, (2671), 899 states have internal predecessors, (2671), 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) [2022-11-16 19:31:01,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2671 transitions. [2022-11-16 19:31:01,555 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2671 transitions. Word has length 20 [2022-11-16 19:31:01,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:31:01,555 INFO L495 AbstractCegarLoop]: Abstraction has 900 states and 2671 transitions. [2022-11-16 19:31:01,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 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) [2022-11-16 19:31:01,556 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2671 transitions. [2022-11-16 19:31:01,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:31:01,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:31:01,558 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:31:01,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-16 19:31:01,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-16 19:31:01,765 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:31:01,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:31:01,765 INFO L85 PathProgramCache]: Analyzing trace with hash 692383729, now seen corresponding path program 39 times [2022-11-16 19:31:01,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:31:01,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768690257] [2022-11-16 19:31:01,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:31:01,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:31:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:31:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:31:01,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:31:01,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768690257] [2022-11-16 19:31:01,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768690257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:31:01,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972318165] [2022-11-16 19:31:01,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:31:01,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:31:01,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:31:01,963 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:31:01,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-16 19:31:02,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:31:02,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:31:02,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:31:02,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:31:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:31:02,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:31:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:31:02,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972318165] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:31:02,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [828601590] [2022-11-16 19:31:02,476 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:31:02,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:31:02,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 22 [2022-11-16 19:31:02,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356846864] [2022-11-16 19:31:02,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:31:02,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 19:31:02,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:31:02,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 19:31:02,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-11-16 19:31:02,478 INFO L87 Difference]: Start difference. First operand 900 states and 2671 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:31:11,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:31:15,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:31:15,960 INFO L93 Difference]: Finished difference Result 1334 states and 3658 transitions. [2022-11-16 19:31:15,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-16 19:31:15,961 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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 20 [2022-11-16 19:31:15,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:31:15,963 INFO L225 Difference]: With dead ends: 1334 [2022-11-16 19:31:15,963 INFO L226 Difference]: Without dead ends: 1310 [2022-11-16 19:31:15,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=598, Invalid=2708, Unknown=0, NotChecked=0, Total=3306 [2022-11-16 19:31:15,964 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 221 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 53 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:31:15,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 11 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 893 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-11-16 19:31:15,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2022-11-16 19:31:15,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 948. [2022-11-16 19:31:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 2.9852164730728616) internal successors, (2827), 947 states have internal predecessors, (2827), 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) [2022-11-16 19:31:15,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 2827 transitions. [2022-11-16 19:31:15,988 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 2827 transitions. Word has length 20 [2022-11-16 19:31:15,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:31:15,989 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 2827 transitions. [2022-11-16 19:31:15,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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) [2022-11-16 19:31:15,989 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 2827 transitions. [2022-11-16 19:31:15,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:31:15,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:31:15,992 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:31:15,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-16 19:31:16,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:31:16,198 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:31:16,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:31:16,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1676549489, now seen corresponding path program 40 times [2022-11-16 19:31:16,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:31:16,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62857608] [2022-11-16 19:31:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:31:16,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:31:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:31:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:31:16,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:31:16,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62857608] [2022-11-16 19:31:16,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62857608] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:31:16,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627911723] [2022-11-16 19:31:16,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:31:16,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:31:16,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:31:16,396 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:31:16,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-16 19:31:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:31:16,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:31:16,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:31:16,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:31:16,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:31:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:31:16,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627911723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:31:16,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1812158118] [2022-11-16 19:31:16,914 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:31:16,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:31:16,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 22 [2022-11-16 19:31:16,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942363721] [2022-11-16 19:31:16,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:31:16,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 19:31:16,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:31:16,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 19:31:16,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-11-16 19:31:16,916 INFO L87 Difference]: Start difference. First operand 948 states and 2827 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:31:22,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:31:29,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:31:29,017 INFO L93 Difference]: Finished difference Result 1394 states and 3835 transitions. [2022-11-16 19:31:29,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-16 19:31:29,018 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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 20 [2022-11-16 19:31:29,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:31:29,020 INFO L225 Difference]: With dead ends: 1394 [2022-11-16 19:31:29,020 INFO L226 Difference]: Without dead ends: 1358 [2022-11-16 19:31:29,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=629, Invalid=2677, Unknown=0, NotChecked=0, Total=3306 [2022-11-16 19:31:29,021 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 201 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 64 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:31:29,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 9 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 859 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-11-16 19:31:29,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2022-11-16 19:31:29,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 998. [2022-11-16 19:31:29,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 2.970912738214644) internal successors, (2962), 997 states have internal predecessors, (2962), 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) [2022-11-16 19:31:29,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 2962 transitions. [2022-11-16 19:31:29,038 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 2962 transitions. Word has length 20 [2022-11-16 19:31:29,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:31:29,038 INFO L495 AbstractCegarLoop]: Abstraction has 998 states and 2962 transitions. [2022-11-16 19:31:29,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 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) [2022-11-16 19:31:29,039 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 2962 transitions. [2022-11-16 19:31:29,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:31:29,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:31:29,045 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:31:29,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-16 19:31:29,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-11-16 19:31:29,250 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:31:29,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:31:29,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1773614257, now seen corresponding path program 41 times [2022-11-16 19:31:29,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:31:29,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679179754] [2022-11-16 19:31:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:31:29,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:31:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:31:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:31:29,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:31:29,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679179754] [2022-11-16 19:31:29,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679179754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:31:29,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415463903] [2022-11-16 19:31:29,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:31:29,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:31:29,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:31:29,475 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:31:29,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-16 19:31:29,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 19:31:29,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:31:29,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:31:29,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:31:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:31:29,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:31:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:31:29,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415463903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:31:29,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [567219469] [2022-11-16 19:31:29,951 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:31:29,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:31:29,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-16 19:31:29,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176052524] [2022-11-16 19:31:29,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:31:29,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 19:31:29,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:31:29,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 19:31:29,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-11-16 19:31:29,955 INFO L87 Difference]: Start difference. First operand 998 states and 2962 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:31:37,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:31:39,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:31:42,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:31:44,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:31:47,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:31:47,923 INFO L93 Difference]: Finished difference Result 1992 states and 5181 transitions. [2022-11-16 19:31:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 19:31:47,924 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 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 20 [2022-11-16 19:31:47,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:31:47,927 INFO L225 Difference]: With dead ends: 1992 [2022-11-16 19:31:47,927 INFO L226 Difference]: Without dead ends: 1980 [2022-11-16 19:31:47,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=904, Invalid=3128, Unknown=0, NotChecked=0, Total=4032 [2022-11-16 19:31:47,928 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 304 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 60 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:31:47,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 9 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1116 Invalid, 4 Unknown, 0 Unchecked, 11.4s Time] [2022-11-16 19:31:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2022-11-16 19:31:47,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 998. [2022-11-16 19:31:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 2.9699097291875627) internal successors, (2961), 997 states have internal predecessors, (2961), 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) [2022-11-16 19:31:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 2961 transitions. [2022-11-16 19:31:47,953 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 2961 transitions. Word has length 20 [2022-11-16 19:31:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:31:47,953 INFO L495 AbstractCegarLoop]: Abstraction has 998 states and 2961 transitions. [2022-11-16 19:31:47,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 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) [2022-11-16 19:31:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 2961 transitions. [2022-11-16 19:31:47,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:31:47,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:31:47,957 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:31:47,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-16 19:31:48,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-11-16 19:31:48,162 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:31:48,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:31:48,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1003514559, now seen corresponding path program 42 times [2022-11-16 19:31:48,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:31:48,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705381600] [2022-11-16 19:31:48,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:31:48,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:31:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:31:48,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:31:48,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:31:48,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705381600] [2022-11-16 19:31:48,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705381600] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:31:48,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282461153] [2022-11-16 19:31:48,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:31:48,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:31:48,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:31:48,378 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:31:48,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-16 19:31:48,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:31:48,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:31:48,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:31:48,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:31:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:31:48,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:31:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:31:48,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282461153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:31:48,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [830961732] [2022-11-16 19:31:48,882 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:31:48,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:31:48,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-16 19:31:48,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319725679] [2022-11-16 19:31:48,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:31:48,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 19:31:48,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:31:48,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 19:31:48,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-11-16 19:31:48,884 INFO L87 Difference]: Start difference. First operand 998 states and 2961 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:31:59,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:32:01,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:32:07,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:32:09,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:32:20,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:32:25,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:32:27,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:32:47,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:32:59,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:32:59,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:32:59,986 INFO L93 Difference]: Finished difference Result 1686 states and 4603 transitions. [2022-11-16 19:32:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-16 19:32:59,987 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 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 20 [2022-11-16 19:32:59,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:32:59,990 INFO L225 Difference]: With dead ends: 1686 [2022-11-16 19:32:59,990 INFO L226 Difference]: Without dead ends: 1680 [2022-11-16 19:32:59,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 49.2s TimeCoverageRelationStatistics Valid=1220, Invalid=5252, Unknown=8, NotChecked=0, Total=6480 [2022-11-16 19:32:59,991 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 246 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 56 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:32:59,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 8 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1358 Invalid, 8 Unknown, 0 Unchecked, 22.1s Time] [2022-11-16 19:32:59,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2022-11-16 19:33:00,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 898. [2022-11-16 19:33:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 2.9331103678929766) internal successors, (2631), 897 states have internal predecessors, (2631), 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) [2022-11-16 19:33:00,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 2631 transitions. [2022-11-16 19:33:00,010 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 2631 transitions. Word has length 20 [2022-11-16 19:33:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:00,010 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 2631 transitions. [2022-11-16 19:33:00,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 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) [2022-11-16 19:33:00,011 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 2631 transitions. [2022-11-16 19:33:00,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:33:00,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:00,012 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:00,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:00,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:00,215 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:33:00,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:00,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1666046385, now seen corresponding path program 43 times [2022-11-16 19:33:00,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:00,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416973273] [2022-11-16 19:33:00,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:00,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:00,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416973273] [2022-11-16 19:33:00,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416973273] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:33:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676741978] [2022-11-16 19:33:00,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:33:00,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:00,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:00,454 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:00,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-16 19:33:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:00,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:33:00,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:00,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:00,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676741978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:00,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [391696426] [2022-11-16 19:33:00,985 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:33:00,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:33:00,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-11-16 19:33:00,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348741759] [2022-11-16 19:33:00,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:00,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 19:33:00,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:00,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 19:33:00,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-11-16 19:33:00,988 INFO L87 Difference]: Start difference. First operand 898 states and 2631 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:04,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:09,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:11,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:15,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:19,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:20,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:20,659 INFO L93 Difference]: Finished difference Result 1750 states and 4713 transitions. [2022-11-16 19:33:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-16 19:33:20,660 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 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 20 [2022-11-16 19:33:20,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:20,663 INFO L225 Difference]: With dead ends: 1750 [2022-11-16 19:33:20,663 INFO L226 Difference]: Without dead ends: 1694 [2022-11-16 19:33:20,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=985, Invalid=4127, Unknown=0, NotChecked=0, Total=5112 [2022-11-16 19:33:20,664 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 257 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 61 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:20,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 12 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1346 Invalid, 2 Unknown, 0 Unchecked, 10.3s Time] [2022-11-16 19:33:20,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2022-11-16 19:33:20,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 878. [2022-11-16 19:33:20,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 2.9156214367160773) internal successors, (2557), 877 states have internal predecessors, (2557), 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) [2022-11-16 19:33:20,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2557 transitions. [2022-11-16 19:33:20,684 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2557 transitions. Word has length 20 [2022-11-16 19:33:20,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:20,685 INFO L495 AbstractCegarLoop]: Abstraction has 878 states and 2557 transitions. [2022-11-16 19:33:20,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 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) [2022-11-16 19:33:20,685 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2557 transitions. [2022-11-16 19:33:20,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:33:20,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:20,687 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:20,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:20,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:20,889 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:33:20,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:20,889 INFO L85 PathProgramCache]: Analyzing trace with hash -921343887, now seen corresponding path program 44 times [2022-11-16 19:33:20,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:20,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52359596] [2022-11-16 19:33:20,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:20,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:21,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:21,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52359596] [2022-11-16 19:33:21,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52359596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:33:21,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629037317] [2022-11-16 19:33:21,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:33:21,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:21,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:21,160 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:21,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-16 19:33:21,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:33:21,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:33:21,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:33:21,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:21,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:21,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629037317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:21,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1663215288] [2022-11-16 19:33:21,689 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:33:21,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:33:21,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-16 19:33:21,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239596023] [2022-11-16 19:33:21,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:21,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 19:33:21,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:21,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 19:33:21,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:33:21,691 INFO L87 Difference]: Start difference. First operand 878 states and 2557 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:25,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:31,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:35,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:35,950 INFO L93 Difference]: Finished difference Result 1438 states and 3881 transitions. [2022-11-16 19:33:35,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-16 19:33:35,951 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 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 20 [2022-11-16 19:33:35,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:35,953 INFO L225 Difference]: With dead ends: 1438 [2022-11-16 19:33:35,953 INFO L226 Difference]: Without dead ends: 1386 [2022-11-16 19:33:35,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=745, Invalid=3677, Unknown=0, NotChecked=0, Total=4422 [2022-11-16 19:33:35,954 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 359 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 53 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:35,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 13 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1265 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2022-11-16 19:33:35,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2022-11-16 19:33:35,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 952. [2022-11-16 19:33:35,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 2.942166140904311) internal successors, (2798), 951 states have internal predecessors, (2798), 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) [2022-11-16 19:33:35,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 2798 transitions. [2022-11-16 19:33:35,974 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 2798 transitions. Word has length 20 [2022-11-16 19:33:35,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:35,974 INFO L495 AbstractCegarLoop]: Abstraction has 952 states and 2798 transitions. [2022-11-16 19:33:35,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 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) [2022-11-16 19:33:35,975 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 2798 transitions. [2022-11-16 19:33:35,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:33:35,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:35,977 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:35,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:36,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-16 19:33:36,190 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:33:36,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:36,190 INFO L85 PathProgramCache]: Analyzing trace with hash 689597071, now seen corresponding path program 45 times [2022-11-16 19:33:36,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:36,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390566333] [2022-11-16 19:33:36,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:36,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:36,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:36,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390566333] [2022-11-16 19:33:36,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390566333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:33:36,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030194865] [2022-11-16 19:33:36,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:33:36,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:36,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:36,407 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:36,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-16 19:33:36,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:33:36,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:33:36,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:33:36,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:36,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:36,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030194865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:36,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [680347080] [2022-11-16 19:33:36,834 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:33:36,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:33:36,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-11-16 19:33:36,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605371139] [2022-11-16 19:33:36,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:36,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 19:33:36,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:36,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 19:33:36,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:33:36,836 INFO L87 Difference]: Start difference. First operand 952 states and 2798 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 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) [2022-11-16 19:33:41,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:41,207 INFO L93 Difference]: Finished difference Result 1536 states and 4212 transitions. [2022-11-16 19:33:41,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-16 19:33:41,208 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 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 20 [2022-11-16 19:33:41,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:41,210 INFO L225 Difference]: With dead ends: 1536 [2022-11-16 19:33:41,210 INFO L226 Difference]: Without dead ends: 1536 [2022-11-16 19:33:41,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=700, Invalid=4130, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 19:33:41,211 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 372 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:41,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 13 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1550 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 19:33:41,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2022-11-16 19:33:41,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 968. [2022-11-16 19:33:41,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 2.951396070320579) internal successors, (2854), 967 states have internal predecessors, (2854), 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) [2022-11-16 19:33:41,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 2854 transitions. [2022-11-16 19:33:41,229 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 2854 transitions. Word has length 20 [2022-11-16 19:33:41,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:41,229 INFO L495 AbstractCegarLoop]: Abstraction has 968 states and 2854 transitions. [2022-11-16 19:33:41,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 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) [2022-11-16 19:33:41,230 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 2854 transitions. [2022-11-16 19:33:41,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 19:33:41,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:41,231 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:41,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:41,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-16 19:33:41,432 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:33:41,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:41,432 INFO L85 PathProgramCache]: Analyzing trace with hash -850106658, now seen corresponding path program 46 times [2022-11-16 19:33:41,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:41,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418302295] [2022-11-16 19:33:41,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:41,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:41,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:41,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418302295] [2022-11-16 19:33:41,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418302295] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:33:41,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14173810] [2022-11-16 19:33:41,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:33:41,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:41,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:41,680 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:41,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-16 19:33:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:41,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 19:33:41,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:42,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:42,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14173810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:42,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [180793049] [2022-11-16 19:33:42,605 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:33:42,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:33:42,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 25 [2022-11-16 19:33:42,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160278699] [2022-11-16 19:33:42,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:42,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 19:33:42,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:42,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 19:33:42,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-11-16 19:33:42,606 INFO L87 Difference]: Start difference. First operand 968 states and 2854 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 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) [2022-11-16 19:33:43,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:43,401 INFO L93 Difference]: Finished difference Result 1308 states and 3784 transitions. [2022-11-16 19:33:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 19:33:43,402 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 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 21 [2022-11-16 19:33:43,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:43,404 INFO L225 Difference]: With dead ends: 1308 [2022-11-16 19:33:43,404 INFO L226 Difference]: Without dead ends: 1252 [2022-11-16 19:33:43,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-11-16 19:33:43,404 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 132 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:43,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 85 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 19:33:43,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-11-16 19:33:43,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1158. [2022-11-16 19:33:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 2.9801210025929126) internal successors, (3448), 1157 states have internal predecessors, (3448), 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) [2022-11-16 19:33:43,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3448 transitions. [2022-11-16 19:33:43,422 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3448 transitions. Word has length 21 [2022-11-16 19:33:43,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:43,422 INFO L495 AbstractCegarLoop]: Abstraction has 1158 states and 3448 transitions. [2022-11-16 19:33:43,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 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) [2022-11-16 19:33:43,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3448 transitions. [2022-11-16 19:33:43,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 19:33:43,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:43,424 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:43,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:43,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-16 19:33:43,625 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:33:43,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:43,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1723124470, now seen corresponding path program 47 times [2022-11-16 19:33:43,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:43,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152813707] [2022-11-16 19:33:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:43,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:43,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:43,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152813707] [2022-11-16 19:33:43,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152813707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:33:43,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173341772] [2022-11-16 19:33:43,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:33:43,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:43,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:43,928 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:43,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-16 19:33:44,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 19:33:44,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:33:44,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 19:33:44,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:44,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:44,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173341772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:44,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1152688500] [2022-11-16 19:33:44,421 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:33:44,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:33:44,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-11-16 19:33:44,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111018946] [2022-11-16 19:33:44,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:44,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 19:33:44,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:44,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 19:33:44,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-11-16 19:33:44,423 INFO L87 Difference]: Start difference. First operand 1158 states and 3448 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 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) [2022-11-16 19:33:47,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:47,631 INFO L93 Difference]: Finished difference Result 2776 states and 8008 transitions. [2022-11-16 19:33:47,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 19:33:47,631 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 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 22 [2022-11-16 19:33:47,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:47,636 INFO L225 Difference]: With dead ends: 2776 [2022-11-16 19:33:47,636 INFO L226 Difference]: Without dead ends: 2776 [2022-11-16 19:33:47,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=493, Invalid=2263, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 19:33:47,637 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 437 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:47,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 66 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 19:33:47,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2022-11-16 19:33:47,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 1184. [2022-11-16 19:33:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.985629754860524) internal successors, (3532), 1183 states have internal predecessors, (3532), 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) [2022-11-16 19:33:47,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3532 transitions. [2022-11-16 19:33:47,671 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3532 transitions. Word has length 22 [2022-11-16 19:33:47,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:47,671 INFO L495 AbstractCegarLoop]: Abstraction has 1184 states and 3532 transitions. [2022-11-16 19:33:47,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 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) [2022-11-16 19:33:47,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3532 transitions. [2022-11-16 19:33:47,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 19:33:47,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:47,674 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:47,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:47,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:47,875 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:33:47,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:47,875 INFO L85 PathProgramCache]: Analyzing trace with hash -988863826, now seen corresponding path program 48 times [2022-11-16 19:33:47,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:47,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727676157] [2022-11-16 19:33:47,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:47,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:48,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:48,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727676157] [2022-11-16 19:33:48,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727676157] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:33:48,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148120492] [2022-11-16 19:33:48,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:33:48,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:48,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:48,172 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:48,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-16 19:33:48,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:33:48,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:33:48,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 19:33:48,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:48,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:48,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148120492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:48,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1464879893] [2022-11-16 19:33:48,816 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:33:48,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:33:48,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 28 [2022-11-16 19:33:48,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123650623] [2022-11-16 19:33:48,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:48,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 19:33:48,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:48,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 19:33:48,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-11-16 19:33:48,819 INFO L87 Difference]: Start difference. First operand 1184 states and 3532 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:55,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:34:09,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:34:16,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:34:25,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:36:13,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:36:22,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:37:43,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:37:43,929 INFO L93 Difference]: Finished difference Result 6482 states and 17069 transitions. [2022-11-16 19:37:43,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-11-16 19:37:43,929 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 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 22 [2022-11-16 19:37:43,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:37:43,942 INFO L225 Difference]: With dead ends: 6482 [2022-11-16 19:37:43,943 INFO L226 Difference]: Without dead ends: 6462 [2022-11-16 19:37:43,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13595 ImplicationChecksByTransitivity, 212.2s TimeCoverageRelationStatistics Valid=5335, Invalid=26877, Unknown=8, NotChecked=0, Total=32220 [2022-11-16 19:37:43,944 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1422 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 343 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1422 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:37:43,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1422 Valid, 45 Invalid, 2617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 2269 Invalid, 5 Unknown, 0 Unchecked, 23.1s Time] [2022-11-16 19:37:43,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6462 states. [2022-11-16 19:37:44,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6462 to 1452. [2022-11-16 19:37:44,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 3.0778773259820813) internal successors, (4466), 1451 states have internal predecessors, (4466), 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) [2022-11-16 19:37:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 4466 transitions. [2022-11-16 19:37:44,045 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 4466 transitions. Word has length 22 [2022-11-16 19:37:44,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:37:44,046 INFO L495 AbstractCegarLoop]: Abstraction has 1452 states and 4466 transitions. [2022-11-16 19:37:44,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 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) [2022-11-16 19:37:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 4466 transitions. [2022-11-16 19:37:44,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 19:37:44,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:37:44,050 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:37:44,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-16 19:37:44,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-16 19:37:44,257 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 19:37:44,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:37:44,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1758963524, now seen corresponding path program 49 times [2022-11-16 19:37:44,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:37:44,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542789757] [2022-11-16 19:37:44,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:37:44,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:37:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:37:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:44,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:37:44,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542789757] [2022-11-16 19:37:44,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542789757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:37:44,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981886484] [2022-11-16 19:37:44,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:37:44,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:37:44,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:37:44,603 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:37:44,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c83484-345a-45ab-8249-898120f89f7b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-16 19:37:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:37:44,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 19:37:44,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:37:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:44,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:37:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:45,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981886484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:37:45,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [122142727] [2022-11-16 19:37:45,225 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 19:37:45,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:37:45,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 28 [2022-11-16 19:37:45,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909015306] [2022-11-16 19:37:45,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:37:45,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 19:37:45,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:37:45,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 19:37:45,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-11-16 19:37:45,227 INFO L87 Difference]: Start difference. First operand 1452 states and 4466 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:38:14,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:38:20,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:38:22,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:38:54,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:39:00,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 19:39:17,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []