./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe019_power.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3258baa4-a79a-4b03-a776-2f688cddbc0f/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3258baa4-a79a-4b03-a776-2f688cddbc0f/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_3258baa4-a79a-4b03-a776-2f688cddbc0f/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3258baa4-a79a-4b03-a776-2f688cddbc0f/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe019_power.opt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3258baa4-a79a-4b03-a776-2f688cddbc0f/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_3258baa4-a79a-4b03-a776-2f688cddbc0f/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 57c8b47d74ada5c94291d16aafebbb644062493fff61510a323122bcd88ba5b1 --- 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 20:22:15,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:22:15,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:22:15,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:22:15,419 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:22:15,420 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:22:15,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:22:15,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:22:15,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:22:15,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:22:15,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:22:15,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:22:15,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:22:15,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:22:15,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:22:15,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:22:15,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:22:15,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:22:15,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:22:15,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:22:15,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:22:15,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:22:15,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:22:15,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:22:15,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:22:15,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:22:15,469 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:22:15,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:22:15,470 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:22:15,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:22:15,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:22:15,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:22:15,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:22:15,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:22:15,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:22:15,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:22:15,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:22:15,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:22:15,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:22:15,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:22:15,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:22:15,480 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3258baa4-a79a-4b03-a776-2f688cddbc0f/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-16 20:22:15,501 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:22:15,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:22:15,502 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:22:15,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:22:15,503 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:22:15,503 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:22:15,504 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:22:15,504 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:22:15,504 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:22:15,504 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:22:15,505 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:22:15,505 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:22:15,505 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:22:15,505 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:22:15,506 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:22:15,506 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:22:15,506 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:22:15,506 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:22:15,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 20:22:15,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 20:22:15,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:22:15,508 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:22:15,508 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 20:22:15,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:22:15,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:22:15,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:22:15,509 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 20:22:15,509 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 20:22:15,510 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 20:22:15,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:22:15,510 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 20:22:15,510 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:22:15,511 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:22:15,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:22:15,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:22:15,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:22:15,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:22:15,512 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:22:15,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:22:15,512 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:22:15,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:22:15,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:22:15,513 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_3258baa4-a79a-4b03-a776-2f688cddbc0f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3258baa4-a79a-4b03-a776-2f688cddbc0f/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57c8b47d74ada5c94291d16aafebbb644062493fff61510a323122bcd88ba5b1 [2022-11-16 20:22:15,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:22:15,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:22:15,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:22:15,826 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:22:15,827 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:22:15,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3258baa4-a79a-4b03-a776-2f688cddbc0f/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/pthread-wmm/safe019_power.opt.i [2022-11-16 20:22:15,901 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3258baa4-a79a-4b03-a776-2f688cddbc0f/bin/utaipan-Xvt2sAort0/data/179a4cd35/ceefcfc6846b4e8f9e42209cfd9310fe/FLAG352b2d5d5 [2022-11-16 20:22:16,431 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:22:16,431 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3258baa4-a79a-4b03-a776-2f688cddbc0f/sv-benchmarks/c/pthread-wmm/safe019_power.opt.i [2022-11-16 20:22:16,461 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3258baa4-a79a-4b03-a776-2f688cddbc0f/bin/utaipan-Xvt2sAort0/data/179a4cd35/ceefcfc6846b4e8f9e42209cfd9310fe/FLAG352b2d5d5 [2022-11-16 20:22:16,732 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3258baa4-a79a-4b03-a776-2f688cddbc0f/bin/utaipan-Xvt2sAort0/data/179a4cd35/ceefcfc6846b4e8f9e42209cfd9310fe [2022-11-16 20:22:16,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:22:16,739 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:22:16,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:22:16,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:22:16,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:22:16,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:22:16" (1/1) ... [2022-11-16 20:22:16,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1415da0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:16, skipping insertion in model container [2022-11-16 20:22:16,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:22:16" (1/1) ... [2022-11-16 20:22:16,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:22:16,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:22:17,152 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_3258baa4-a79a-4b03-a776-2f688cddbc0f/sv-benchmarks/c/pthread-wmm/safe019_power.opt.i[994,1007] [2022-11-16 20:22:17,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:22:17,517 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:22:17,534 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_3258baa4-a79a-4b03-a776-2f688cddbc0f/sv-benchmarks/c/pthread-wmm/safe019_power.opt.i[994,1007] [2022-11-16 20:22:17,600 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:22:17,631 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:22:17,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:17 WrapperNode [2022-11-16 20:22:17,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:22:17,633 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:22:17,633 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:22:17,633 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:22:17,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:17" (1/1) ... [2022-11-16 20:22:17,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:17" (1/1) ... [2022-11-16 20:22:17,693 INFO L138 Inliner]: procedures = 177, calls = 88, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 193 [2022-11-16 20:22:17,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:22:17,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:22:17,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:22:17,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:22:17,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:17" (1/1) ... [2022-11-16 20:22:17,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:17" (1/1) ... [2022-11-16 20:22:17,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:17" (1/1) ... [2022-11-16 20:22:17,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:17" (1/1) ... [2022-11-16 20:22:17,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:17" (1/1) ... [2022-11-16 20:22:17,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:17" (1/1) ... [2022-11-16 20:22:17,759 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:17" (1/1) ... [2022-11-16 20:22:17,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:17" (1/1) ... [2022-11-16 20:22:17,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:22:17,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:22:17,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:22:17,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:22:17,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:17" (1/1) ... [2022-11-16 20:22:17,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:22:17,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3258baa4-a79a-4b03-a776-2f688cddbc0f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:22:17,824 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3258baa4-a79a-4b03-a776-2f688cddbc0f/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:22:17,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3258baa4-a79a-4b03-a776-2f688cddbc0f/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:22:17,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 20:22:17,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 20:22:17,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 20:22:17,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:22:17,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 20:22:17,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 20:22:17,865 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2022-11-16 20:22:17,865 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2022-11-16 20:22:17,865 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2022-11-16 20:22:17,866 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2022-11-16 20:22:17,866 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2022-11-16 20:22:17,866 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2022-11-16 20:22:17,866 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2022-11-16 20:22:17,866 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2022-11-16 20:22:17,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:22:17,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 20:22:17,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:22:17,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:22:17,869 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 20:22:18,071 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:22:18,073 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:22:18,895 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:22:19,556 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:22:19,556 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-16 20:22:19,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:22:19 BoogieIcfgContainer [2022-11-16 20:22:19,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:22:19,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:22:19,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:22:19,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:22:19,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:22:16" (1/3) ... [2022-11-16 20:22:19,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@176a6d4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:22:19, skipping insertion in model container [2022-11-16 20:22:19,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:17" (2/3) ... [2022-11-16 20:22:19,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@176a6d4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:22:19, skipping insertion in model container [2022-11-16 20:22:19,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:22:19" (3/3) ... [2022-11-16 20:22:19,571 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_power.opt.i [2022-11-16 20:22:19,590 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:22:19,591 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2022-11-16 20:22:19,591 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 20:22:19,789 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 20:22:19,823 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 20:22:19,836 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 221 places, 210 transitions, 440 flow [2022-11-16 20:22:19,839 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 221 places, 210 transitions, 440 flow [2022-11-16 20:22:19,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 210 transitions, 440 flow [2022-11-16 20:22:19,934 INFO L130 PetriNetUnfolder]: 2/206 cut-off events. [2022-11-16 20:22:19,935 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 20:22:19,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 206 events. 2/206 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 321 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 143. Up to 2 conditions per place. [2022-11-16 20:22:19,948 INFO L119 LiptonReduction]: Number of co-enabled transitions 10744 [2022-11-16 20:22:44,600 INFO L134 LiptonReduction]: Checked pairs total: 49876 [2022-11-16 20:22:44,600 INFO L136 LiptonReduction]: Total number of compositions: 194 [2022-11-16 20:22:44,609 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 105 places, 93 transitions, 206 flow [2022-11-16 20:23:00,203 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 479588 states, 402419 states have (on average 5.512257125036343) internal successors, (2218237), 479587 states have internal predecessors, (2218237), 0 states have call successors, (0), 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 20:23:00,241 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:23:00,270 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;@4a5f184e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:23:00,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 102 error locations. [2022-11-16 20:23:02,002 INFO L276 IsEmpty]: Start isEmpty. Operand has 479588 states, 402419 states have (on average 5.512257125036343) internal successors, (2218237), 479587 states have internal predecessors, (2218237), 0 states have call successors, (0), 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 20:23:02,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-16 20:23:02,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:02,009 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-16 20:23:02,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:02,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:02,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1315, now seen corresponding path program 1 times [2022-11-16 20:23:02,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:02,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346689620] [2022-11-16 20:23:02,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:02,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:02,176 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 20:23:02,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:02,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346689620] [2022-11-16 20:23:02,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346689620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:02,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:02,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-16 20:23:02,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378330506] [2022-11-16 20:23:02,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:02,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 20:23:02,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:02,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 20:23:02,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 20:23:03,130 INFO L87 Difference]: Start difference. First operand has 479588 states, 402419 states have (on average 5.512257125036343) internal successors, (2218237), 479587 states have internal predecessors, (2218237), 0 states have call successors, (0), 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 20:23:05,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:05,906 INFO L93 Difference]: Finished difference Result 77980 states and 344739 transitions. [2022-11-16 20:23:05,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 20:23:05,910 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 20:23:05,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:06,838 INFO L225 Difference]: With dead ends: 77980 [2022-11-16 20:23:06,838 INFO L226 Difference]: Without dead ends: 77980 [2022-11-16 20:23:06,839 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 20:23:06,845 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:06,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:23:07,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77980 states. [2022-11-16 20:23:10,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77980 to 77980. [2022-11-16 20:23:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77980 states, 72311 states have (on average 4.767448935846551) internal successors, (344739), 77979 states have internal predecessors, (344739), 0 states have call successors, (0), 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 20:23:11,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77980 states to 77980 states and 344739 transitions. [2022-11-16 20:23:11,279 INFO L78 Accepts]: Start accepts. Automaton has 77980 states and 344739 transitions. Word has length 1 [2022-11-16 20:23:11,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:11,280 INFO L495 AbstractCegarLoop]: Abstraction has 77980 states and 344739 transitions. [2022-11-16 20:23:11,280 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 20:23:11,280 INFO L276 IsEmpty]: Start isEmpty. Operand 77980 states and 344739 transitions. [2022-11-16 20:23:11,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 20:23:11,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:11,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 20:23:11,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:23:11,282 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:11,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:11,283 INFO L85 PathProgramCache]: Analyzing trace with hash 40293954, now seen corresponding path program 1 times [2022-11-16 20:23:11,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:11,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155139266] [2022-11-16 20:23:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:11,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:11,546 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 20:23:11,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:11,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155139266] [2022-11-16 20:23:11,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155139266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:11,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:11,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:23:11,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700922083] [2022-11-16 20:23:11,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:11,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:23:11,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:11,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:23:11,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:23:11,550 INFO L87 Difference]: Start difference. First operand 77980 states and 344739 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:13,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:13,009 INFO L93 Difference]: Finished difference Result 59370 states and 238107 transitions. [2022-11-16 20:23:13,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:23:13,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 20:23:13,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:13,565 INFO L225 Difference]: With dead ends: 59370 [2022-11-16 20:23:13,565 INFO L226 Difference]: Without dead ends: 59370 [2022-11-16 20:23:13,565 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 20:23:13,567 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:13,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 3 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:23:13,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59370 states. [2022-11-16 20:23:16,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59370 to 53466. [2022-11-16 20:23:16,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53466 states, 51727 states have (on average 4.423589228062714) internal successors, (228819), 53465 states have internal predecessors, (228819), 0 states have call successors, (0), 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 20:23:16,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53466 states to 53466 states and 228819 transitions. [2022-11-16 20:23:16,451 INFO L78 Accepts]: Start accepts. Automaton has 53466 states and 228819 transitions. Word has length 4 [2022-11-16 20:23:16,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:16,452 INFO L495 AbstractCegarLoop]: Abstraction has 53466 states and 228819 transitions. [2022-11-16 20:23:16,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand 53466 states and 228819 transitions. [2022-11-16 20:23:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 20:23:16,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:16,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 20:23:16,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 20:23:16,453 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:16,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:16,454 INFO L85 PathProgramCache]: Analyzing trace with hash 40293955, now seen corresponding path program 1 times [2022-11-16 20:23:16,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:16,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012199424] [2022-11-16 20:23:16,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:16,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:16,643 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 20:23:16,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:16,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012199424] [2022-11-16 20:23:16,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012199424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:16,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:16,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:23:16,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063244875] [2022-11-16 20:23:16,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:16,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:23:16,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:16,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:23:16,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:23:16,650 INFO L87 Difference]: Start difference. First operand 53466 states and 228819 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:17,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:17,559 INFO L93 Difference]: Finished difference Result 17348 states and 66516 transitions. [2022-11-16 20:23:17,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:23:17,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 20:23:17,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:17,817 INFO L225 Difference]: With dead ends: 17348 [2022-11-16 20:23:17,817 INFO L226 Difference]: Without dead ends: 17128 [2022-11-16 20:23:17,818 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 20:23:17,822 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:17,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 2 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:23:17,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17128 states. [2022-11-16 20:23:18,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17128 to 17128. [2022-11-16 20:23:18,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17128 states, 16931 states have (on average 3.8712421002894097) internal successors, (65544), 17127 states have internal predecessors, (65544), 0 states have call successors, (0), 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 20:23:18,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17128 states to 17128 states and 65544 transitions. [2022-11-16 20:23:18,404 INFO L78 Accepts]: Start accepts. Automaton has 17128 states and 65544 transitions. Word has length 4 [2022-11-16 20:23:18,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:18,405 INFO L495 AbstractCegarLoop]: Abstraction has 17128 states and 65544 transitions. [2022-11-16 20:23:18,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:18,405 INFO L276 IsEmpty]: Start isEmpty. Operand 17128 states and 65544 transitions. [2022-11-16 20:23:18,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 20:23:18,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:18,406 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 20:23:18,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 20:23:18,407 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting P1Err0ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:18,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:18,407 INFO L85 PathProgramCache]: Analyzing trace with hash 68316870, now seen corresponding path program 1 times [2022-11-16 20:23:18,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:18,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583090355] [2022-11-16 20:23:18,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:18,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:18,598 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 20:23:18,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:18,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583090355] [2022-11-16 20:23:18,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583090355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:18,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:18,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:23:18,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207619268] [2022-11-16 20:23:18,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:18,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:23:18,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:18,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:23:18,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:23:18,602 INFO L87 Difference]: Start difference. First operand 17128 states and 65544 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 20:23:18,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:18,877 INFO L93 Difference]: Finished difference Result 14606 states and 54863 transitions. [2022-11-16 20:23:18,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:23:18,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-16 20:23:18,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:18,958 INFO L225 Difference]: With dead ends: 14606 [2022-11-16 20:23:18,958 INFO L226 Difference]: Without dead ends: 14530 [2022-11-16 20:23:18,959 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 20:23:18,960 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 26 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:18,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 4 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:23:18,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14530 states. [2022-11-16 20:23:19,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14530 to 14530. [2022-11-16 20:23:19,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14530 states, 14384 states have (on average 3.797205228031146) internal successors, (54619), 14529 states have internal predecessors, (54619), 0 states have call successors, (0), 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 20:23:19,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14530 states to 14530 states and 54619 transitions. [2022-11-16 20:23:19,375 INFO L78 Accepts]: Start accepts. Automaton has 14530 states and 54619 transitions. Word has length 6 [2022-11-16 20:23:19,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:19,375 INFO L495 AbstractCegarLoop]: Abstraction has 14530 states and 54619 transitions. [2022-11-16 20:23:19,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 20:23:19,376 INFO L276 IsEmpty]: Start isEmpty. Operand 14530 states and 54619 transitions. [2022-11-16 20:23:19,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 20:23:19,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:19,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:19,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 20:23:19,382 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:19,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:19,385 INFO L85 PathProgramCache]: Analyzing trace with hash -212853768, now seen corresponding path program 1 times [2022-11-16 20:23:19,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:19,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036178254] [2022-11-16 20:23:19,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:19,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:19,587 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 20:23:19,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:19,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036178254] [2022-11-16 20:23:19,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036178254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:19,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:19,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:23:19,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857806165] [2022-11-16 20:23:19,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:19,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:23:19,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:19,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:23:19,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:23:19,590 INFO L87 Difference]: Start difference. First operand 14530 states and 54619 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 20:23:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:20,271 INFO L93 Difference]: Finished difference Result 14402 states and 54075 transitions. [2022-11-16 20:23:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:23:20,272 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 20:23:20,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:20,339 INFO L225 Difference]: With dead ends: 14402 [2022-11-16 20:23:20,339 INFO L226 Difference]: Without dead ends: 14402 [2022-11-16 20:23:20,340 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 20:23:20,341 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:20,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 4 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 20:23:20,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14402 states. [2022-11-16 20:23:20,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14402 to 14402. [2022-11-16 20:23:20,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14402 states, 14256 states have (on average 3.7931397306397305) internal successors, (54075), 14401 states have internal predecessors, (54075), 0 states have call successors, (0), 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 20:23:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 54075 transitions. [2022-11-16 20:23:20,741 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 54075 transitions. Word has length 13 [2022-11-16 20:23:20,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:20,742 INFO L495 AbstractCegarLoop]: Abstraction has 14402 states and 54075 transitions. [2022-11-16 20:23:20,742 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 20:23:20,743 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 54075 transitions. [2022-11-16 20:23:20,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 20:23:20,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:20,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:20,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 20:23:20,748 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:20,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:20,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1008062615, now seen corresponding path program 1 times [2022-11-16 20:23:20,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:20,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322438882] [2022-11-16 20:23:20,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:20,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:21,128 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 20:23:21,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:21,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322438882] [2022-11-16 20:23:21,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322438882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:21,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:21,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:23:21,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144191112] [2022-11-16 20:23:21,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:21,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:23:21,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:21,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:23:21,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:23:21,133 INFO L87 Difference]: Start difference. First operand 14402 states and 54075 transitions. Second operand has 5 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 20:23:21,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:21,455 INFO L93 Difference]: Finished difference Result 14146 states and 53051 transitions. [2022-11-16 20:23:21,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:23:21,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 20:23:21,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:21,526 INFO L225 Difference]: With dead ends: 14146 [2022-11-16 20:23:21,527 INFO L226 Difference]: Without dead ends: 14146 [2022-11-16 20:23:21,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:23:21,528 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 56 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:21,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 4 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:23:21,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14146 states. [2022-11-16 20:23:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14146 to 14146. [2022-11-16 20:23:21,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14146 states, 14001 states have (on average 3.78908649382187) internal successors, (53051), 14145 states have internal predecessors, (53051), 0 states have call successors, (0), 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 20:23:21,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14146 states to 14146 states and 53051 transitions. [2022-11-16 20:23:21,936 INFO L78 Accepts]: Start accepts. Automaton has 14146 states and 53051 transitions. Word has length 14 [2022-11-16 20:23:21,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:21,936 INFO L495 AbstractCegarLoop]: Abstraction has 14146 states and 53051 transitions. [2022-11-16 20:23:21,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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 20:23:21,937 INFO L276 IsEmpty]: Start isEmpty. Operand 14146 states and 53051 transitions. [2022-11-16 20:23:21,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 20:23:21,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:21,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:21,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 20:23:21,939 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:21,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:21,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1008062614, now seen corresponding path program 1 times [2022-11-16 20:23:21,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:21,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525483287] [2022-11-16 20:23:21,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:21,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:22,776 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 20:23:22,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:22,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525483287] [2022-11-16 20:23:22,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525483287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:22,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:22,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:23:22,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230902534] [2022-11-16 20:23:22,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:22,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:23:22,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:22,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:23:22,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:23:22,780 INFO L87 Difference]: Start difference. First operand 14146 states and 53051 transitions. Second operand has 5 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 20:23:23,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:23,103 INFO L93 Difference]: Finished difference Result 13890 states and 52027 transitions. [2022-11-16 20:23:23,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:23:23,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 20:23:23,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:23,171 INFO L225 Difference]: With dead ends: 13890 [2022-11-16 20:23:23,172 INFO L226 Difference]: Without dead ends: 13890 [2022-11-16 20:23:23,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:23:23,173 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 82 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:23,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 4 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:23:23,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13890 states. [2022-11-16 20:23:23,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13890 to 13890. [2022-11-16 20:23:23,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13890 states, 13746 states have (on average 3.7848828750181873) internal successors, (52027), 13889 states have internal predecessors, (52027), 0 states have call successors, (0), 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 20:23:23,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13890 states to 13890 states and 52027 transitions. [2022-11-16 20:23:23,668 INFO L78 Accepts]: Start accepts. Automaton has 13890 states and 52027 transitions. Word has length 14 [2022-11-16 20:23:23,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:23,668 INFO L495 AbstractCegarLoop]: Abstraction has 13890 states and 52027 transitions. [2022-11-16 20:23:23,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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 20:23:23,669 INFO L276 IsEmpty]: Start isEmpty. Operand 13890 states and 52027 transitions. [2022-11-16 20:23:23,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 20:23:23,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:23,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:23,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 20:23:23,671 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:23,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:23,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1991460713, now seen corresponding path program 1 times [2022-11-16 20:23:23,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:23,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500491344] [2022-11-16 20:23:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:23,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:23,890 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 20:23:23,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:23,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500491344] [2022-11-16 20:23:23,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500491344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:23,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:23,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:23:23,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707951271] [2022-11-16 20:23:23,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:23,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:23:23,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:23,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:23:23,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:23:23,894 INFO L87 Difference]: Start difference. First operand 13890 states and 52027 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 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 20:23:24,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:24,184 INFO L93 Difference]: Finished difference Result 13810 states and 51683 transitions. [2022-11-16 20:23:24,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:23:24,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 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 20:23:24,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:24,271 INFO L225 Difference]: With dead ends: 13810 [2022-11-16 20:23:24,272 INFO L226 Difference]: Without dead ends: 13810 [2022-11-16 20:23:24,272 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 20:23:24,274 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:24,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 4 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:23:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13810 states. [2022-11-16 20:23:24,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13810 to 13810. [2022-11-16 20:23:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13810 states, 13666 states have (on average 3.781867408166252) internal successors, (51683), 13809 states have internal predecessors, (51683), 0 states have call successors, (0), 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 20:23:24,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13810 states to 13810 states and 51683 transitions. [2022-11-16 20:23:24,926 INFO L78 Accepts]: Start accepts. Automaton has 13810 states and 51683 transitions. Word has length 14 [2022-11-16 20:23:24,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:24,927 INFO L495 AbstractCegarLoop]: Abstraction has 13810 states and 51683 transitions. [2022-11-16 20:23:24,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 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 20:23:24,927 INFO L276 IsEmpty]: Start isEmpty. Operand 13810 states and 51683 transitions. [2022-11-16 20:23:24,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 20:23:24,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:24,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:24,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 20:23:24,929 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:24,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:24,929 INFO L85 PathProgramCache]: Analyzing trace with hash -744761032, now seen corresponding path program 1 times [2022-11-16 20:23:24,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:24,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444973572] [2022-11-16 20:23:24,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:24,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:25,129 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 20:23:25,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:25,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444973572] [2022-11-16 20:23:25,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444973572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:25,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:25,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:23:25,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81437267] [2022-11-16 20:23:25,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:25,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:23:25,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:25,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:23:25,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:23:25,133 INFO L87 Difference]: Start difference. First operand 13810 states and 51683 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:25,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:25,364 INFO L93 Difference]: Finished difference Result 13786 states and 51577 transitions. [2022-11-16 20:23:25,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:23:25,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 20:23:25,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:25,436 INFO L225 Difference]: With dead ends: 13786 [2022-11-16 20:23:25,436 INFO L226 Difference]: Without dead ends: 13786 [2022-11-16 20:23:25,436 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 20:23:25,438 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:25,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:23:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13786 states. [2022-11-16 20:23:25,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13786 to 13786. [2022-11-16 20:23:25,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13786 states, 13642 states have (on average 3.7807506230757952) internal successors, (51577), 13785 states have internal predecessors, (51577), 0 states have call successors, (0), 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 20:23:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13786 states to 13786 states and 51577 transitions. [2022-11-16 20:23:25,805 INFO L78 Accepts]: Start accepts. Automaton has 13786 states and 51577 transitions. Word has length 15 [2022-11-16 20:23:25,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:25,806 INFO L495 AbstractCegarLoop]: Abstraction has 13786 states and 51577 transitions. [2022-11-16 20:23:25,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:25,806 INFO L276 IsEmpty]: Start isEmpty. Operand 13786 states and 51577 transitions. [2022-11-16 20:23:25,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 20:23:25,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:25,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:25,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 20:23:25,808 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:25,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:25,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1615746519, now seen corresponding path program 1 times [2022-11-16 20:23:25,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:25,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004210691] [2022-11-16 20:23:25,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:25,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:25,993 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 20:23:25,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:25,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004210691] [2022-11-16 20:23:25,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004210691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:25,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:25,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:23:25,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399190523] [2022-11-16 20:23:25,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:25,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:23:25,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:25,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:23:25,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:23:25,996 INFO L87 Difference]: Start difference. First operand 13786 states and 51577 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 20:23:26,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:26,397 INFO L93 Difference]: Finished difference Result 23624 states and 87670 transitions. [2022-11-16 20:23:26,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:23:26,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 20:23:26,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:26,523 INFO L225 Difference]: With dead ends: 23624 [2022-11-16 20:23:26,523 INFO L226 Difference]: Without dead ends: 23624 [2022-11-16 20:23:26,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:23:26,524 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 71 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:26,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 5 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:23:26,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23624 states. [2022-11-16 20:23:27,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23624 to 14542. [2022-11-16 20:23:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14542 states, 14398 states have (on average 3.7816363383803306) internal successors, (54448), 14541 states have internal predecessors, (54448), 0 states have call successors, (0), 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 20:23:27,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14542 states to 14542 states and 54448 transitions. [2022-11-16 20:23:27,134 INFO L78 Accepts]: Start accepts. Automaton has 14542 states and 54448 transitions. Word has length 16 [2022-11-16 20:23:27,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:27,135 INFO L495 AbstractCegarLoop]: Abstraction has 14542 states and 54448 transitions. [2022-11-16 20:23:27,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 20:23:27,135 INFO L276 IsEmpty]: Start isEmpty. Operand 14542 states and 54448 transitions. [2022-11-16 20:23:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 20:23:27,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:27,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:27,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 20:23:27,138 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:27,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:27,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1854390477, now seen corresponding path program 2 times [2022-11-16 20:23:27,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:27,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197801236] [2022-11-16 20:23:27,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:27,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:27,398 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 20:23:27,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:27,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197801236] [2022-11-16 20:23:27,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197801236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:27,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:27,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 20:23:27,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230625146] [2022-11-16 20:23:27,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:27,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:23:27,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:27,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:23:27,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:23:27,402 INFO L87 Difference]: Start difference. First operand 14542 states and 54448 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 20:23:27,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:27,666 INFO L93 Difference]: Finished difference Result 14506 states and 54301 transitions. [2022-11-16 20:23:27,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:23:27,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 20:23:27,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:27,740 INFO L225 Difference]: With dead ends: 14506 [2022-11-16 20:23:27,740 INFO L226 Difference]: Without dead ends: 14506 [2022-11-16 20:23:27,741 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 20:23:27,741 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:27,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 4 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:23:27,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14506 states. [2022-11-16 20:23:28,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14506 to 14506. [2022-11-16 20:23:28,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14506 states, 14362 states have (on average 3.780880100264587) internal successors, (54301), 14505 states have internal predecessors, (54301), 0 states have call successors, (0), 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 20:23:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14506 states to 14506 states and 54301 transitions. [2022-11-16 20:23:28,172 INFO L78 Accepts]: Start accepts. Automaton has 14506 states and 54301 transitions. Word has length 16 [2022-11-16 20:23:28,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:28,173 INFO L495 AbstractCegarLoop]: Abstraction has 14506 states and 54301 transitions. [2022-11-16 20:23:28,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 20:23:28,173 INFO L276 IsEmpty]: Start isEmpty. Operand 14506 states and 54301 transitions. [2022-11-16 20:23:28,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 20:23:28,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:28,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:28,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 20:23:28,177 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting P2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:28,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:28,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1761638344, now seen corresponding path program 1 times [2022-11-16 20:23:28,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:28,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474535566] [2022-11-16 20:23:28,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:28,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:28,415 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 20:23:28,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:28,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474535566] [2022-11-16 20:23:28,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474535566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:28,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:28,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:23:28,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523281826] [2022-11-16 20:23:28,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:28,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:23:28,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:28,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:23:28,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:23:28,418 INFO L87 Difference]: Start difference. First operand 14506 states and 54301 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 20:23:28,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:28,718 INFO L93 Difference]: Finished difference Result 13558 states and 48753 transitions. [2022-11-16 20:23:28,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:23:28,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 20:23:28,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:28,772 INFO L225 Difference]: With dead ends: 13558 [2022-11-16 20:23:28,772 INFO L226 Difference]: Without dead ends: 13558 [2022-11-16 20:23:28,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:23:28,773 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:28,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 4 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:23:28,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13558 states. [2022-11-16 20:23:29,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13558 to 12366. [2022-11-16 20:23:29,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12366 states, 12222 states have (on average 3.756913762068401) internal successors, (45917), 12365 states have internal predecessors, (45917), 0 states have call successors, (0), 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 20:23:29,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12366 states to 12366 states and 45917 transitions. [2022-11-16 20:23:29,382 INFO L78 Accepts]: Start accepts. Automaton has 12366 states and 45917 transitions. Word has length 16 [2022-11-16 20:23:29,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:29,382 INFO L495 AbstractCegarLoop]: Abstraction has 12366 states and 45917 transitions. [2022-11-16 20:23:29,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 20:23:29,383 INFO L276 IsEmpty]: Start isEmpty. Operand 12366 states and 45917 transitions. [2022-11-16 20:23:29,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:23:29,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:29,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:29,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 20:23:29,388 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:29,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:29,389 INFO L85 PathProgramCache]: Analyzing trace with hash 519625866, now seen corresponding path program 1 times [2022-11-16 20:23:29,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:29,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124025660] [2022-11-16 20:23:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:29,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:29,685 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 20:23:29,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:29,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124025660] [2022-11-16 20:23:29,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124025660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:29,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:29,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:23:29,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436902044] [2022-11-16 20:23:29,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:29,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:23:29,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:29,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:23:29,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:23:29,688 INFO L87 Difference]: Start difference. First operand 12366 states and 45917 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:30,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:30,171 INFO L93 Difference]: Finished difference Result 27614 states and 100810 transitions. [2022-11-16 20:23:30,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:23:30,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 20:23:30,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:30,282 INFO L225 Difference]: With dead ends: 27614 [2022-11-16 20:23:30,283 INFO L226 Difference]: Without dead ends: 27614 [2022-11-16 20:23:30,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:23:30,284 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 69 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:30,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 9 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:23:30,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27614 states. [2022-11-16 20:23:30,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27614 to 12222. [2022-11-16 20:23:30,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12222 states, 12078 states have (on average 3.7619639013081634) internal successors, (45437), 12221 states have internal predecessors, (45437), 0 states have call successors, (0), 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 20:23:30,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12222 states to 12222 states and 45437 transitions. [2022-11-16 20:23:30,691 INFO L78 Accepts]: Start accepts. Automaton has 12222 states and 45437 transitions. Word has length 17 [2022-11-16 20:23:30,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:30,692 INFO L495 AbstractCegarLoop]: Abstraction has 12222 states and 45437 transitions. [2022-11-16 20:23:30,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:30,692 INFO L276 IsEmpty]: Start isEmpty. Operand 12222 states and 45437 transitions. [2022-11-16 20:23:30,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:23:30,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:30,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:30,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 20:23:30,696 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:30,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:30,697 INFO L85 PathProgramCache]: Analyzing trace with hash -881546718, now seen corresponding path program 1 times [2022-11-16 20:23:30,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:30,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833489137] [2022-11-16 20:23:30,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:30,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:33,106 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 20:23:33,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:33,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833489137] [2022-11-16 20:23:33,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833489137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:33,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:33,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 20:23:33,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921762937] [2022-11-16 20:23:33,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:33,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 20:23:33,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:33,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 20:23:33,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-16 20:23:33,108 INFO L87 Difference]: Start difference. First operand 12222 states and 45437 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:34,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:34,471 INFO L93 Difference]: Finished difference Result 17956 states and 67657 transitions. [2022-11-16 20:23:34,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 20:23:34,472 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 20:23:34,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:34,538 INFO L225 Difference]: With dead ends: 17956 [2022-11-16 20:23:34,538 INFO L226 Difference]: Without dead ends: 17844 [2022-11-16 20:23:34,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-16 20:23:34,539 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 198 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:34,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 21 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 20:23:34,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17844 states. [2022-11-16 20:23:34,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17844 to 13497. [2022-11-16 20:23:34,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13497 states, 13353 states have (on average 3.82423425447465) internal successors, (51065), 13496 states have internal predecessors, (51065), 0 states have call successors, (0), 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 20:23:34,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13497 states to 13497 states and 51065 transitions. [2022-11-16 20:23:34,894 INFO L78 Accepts]: Start accepts. Automaton has 13497 states and 51065 transitions. Word has length 17 [2022-11-16 20:23:34,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:34,894 INFO L495 AbstractCegarLoop]: Abstraction has 13497 states and 51065 transitions. [2022-11-16 20:23:34,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:34,895 INFO L276 IsEmpty]: Start isEmpty. Operand 13497 states and 51065 transitions. [2022-11-16 20:23:34,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:23:34,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:34,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:34,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 20:23:34,899 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:34,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:34,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1313353060, now seen corresponding path program 2 times [2022-11-16 20:23:34,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:34,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416599134] [2022-11-16 20:23:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:34,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:36,850 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 20:23:36,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:36,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416599134] [2022-11-16 20:23:36,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416599134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:36,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:36,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 20:23:36,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111920441] [2022-11-16 20:23:36,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:36,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 20:23:36,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:36,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 20:23:36,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-16 20:23:36,852 INFO L87 Difference]: Start difference. First operand 13497 states and 51065 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:37,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:37,799 INFO L93 Difference]: Finished difference Result 14826 states and 56802 transitions. [2022-11-16 20:23:37,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 20:23:37,800 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 20:23:37,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:37,852 INFO L225 Difference]: With dead ends: 14826 [2022-11-16 20:23:37,852 INFO L226 Difference]: Without dead ends: 14826 [2022-11-16 20:23:37,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-16 20:23:37,853 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 132 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:37,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 19 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 20:23:37,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14826 states. [2022-11-16 20:23:38,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14826 to 13491. [2022-11-16 20:23:38,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13491 states, 13347 states have (on average 3.8238555480632352) internal successors, (51037), 13490 states have internal predecessors, (51037), 0 states have call successors, (0), 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 20:23:38,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13491 states to 13491 states and 51037 transitions. [2022-11-16 20:23:38,157 INFO L78 Accepts]: Start accepts. Automaton has 13491 states and 51037 transitions. Word has length 17 [2022-11-16 20:23:38,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:38,158 INFO L495 AbstractCegarLoop]: Abstraction has 13491 states and 51037 transitions. [2022-11-16 20:23:38,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:38,158 INFO L276 IsEmpty]: Start isEmpty. Operand 13491 states and 51037 transitions. [2022-11-16 20:23:38,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 20:23:38,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:38,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:38,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 20:23:38,162 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting P2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:38,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:38,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1223781633, now seen corresponding path program 1 times [2022-11-16 20:23:38,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:38,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861143651] [2022-11-16 20:23:38,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:38,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:38,450 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 20:23:38,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:38,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861143651] [2022-11-16 20:23:38,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861143651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:38,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:38,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 20:23:38,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908744944] [2022-11-16 20:23:38,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:38,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 20:23:38,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:38,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 20:23:38,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 20:23:38,453 INFO L87 Difference]: Start difference. First operand 13491 states and 51037 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:38,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:38,801 INFO L93 Difference]: Finished difference Result 12691 states and 45821 transitions. [2022-11-16 20:23:38,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:23:38,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 20:23:38,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:38,844 INFO L225 Difference]: With dead ends: 12691 [2022-11-16 20:23:38,844 INFO L226 Difference]: Without dead ends: 12691 [2022-11-16 20:23:38,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 20:23:38,845 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 95 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:38,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 6 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:23:38,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12691 states. [2022-11-16 20:23:39,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12691 to 11199. [2022-11-16 20:23:39,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11199 states, 11055 states have (on average 3.7981908638625055) internal successors, (41989), 11198 states have internal predecessors, (41989), 0 states have call successors, (0), 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 20:23:39,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11199 states to 11199 states and 41989 transitions. [2022-11-16 20:23:39,199 INFO L78 Accepts]: Start accepts. Automaton has 11199 states and 41989 transitions. Word has length 17 [2022-11-16 20:23:39,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:39,199 INFO L495 AbstractCegarLoop]: Abstraction has 11199 states and 41989 transitions. [2022-11-16 20:23:39,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:39,200 INFO L276 IsEmpty]: Start isEmpty. Operand 11199 states and 41989 transitions. [2022-11-16 20:23:39,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 20:23:39,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:39,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:39,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 20:23:39,205 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:39,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:39,206 INFO L85 PathProgramCache]: Analyzing trace with hash 569679600, now seen corresponding path program 1 times [2022-11-16 20:23:39,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:39,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284885287] [2022-11-16 20:23:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:39,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:39,480 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 20:23:39,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:39,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284885287] [2022-11-16 20:23:39,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284885287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:39,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:39,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:23:39,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65899430] [2022-11-16 20:23:39,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:39,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:23:39,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:39,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:23:39,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:23:39,482 INFO L87 Difference]: Start difference. First operand 11199 states and 41989 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 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 20:23:39,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:39,634 INFO L93 Difference]: Finished difference Result 6142 states and 20596 transitions. [2022-11-16 20:23:39,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:23:39,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 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 20:23:39,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:39,651 INFO L225 Difference]: With dead ends: 6142 [2022-11-16 20:23:39,651 INFO L226 Difference]: Without dead ends: 6142 [2022-11-16 20:23:39,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:23:39,652 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:39,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 4 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:23:39,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6142 states. [2022-11-16 20:23:39,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6142 to 6130. [2022-11-16 20:23:39,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6130 states, 6010 states have (on average 3.4189683860232947) internal successors, (20548), 6129 states have internal predecessors, (20548), 0 states have call successors, (0), 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 20:23:39,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6130 states to 6130 states and 20548 transitions. [2022-11-16 20:23:39,765 INFO L78 Accepts]: Start accepts. Automaton has 6130 states and 20548 transitions. Word has length 18 [2022-11-16 20:23:39,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:39,766 INFO L495 AbstractCegarLoop]: Abstraction has 6130 states and 20548 transitions. [2022-11-16 20:23:39,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 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 20:23:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 6130 states and 20548 transitions. [2022-11-16 20:23:39,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 20:23:39,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:39,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:39,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 20:23:39,769 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:39,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:39,770 INFO L85 PathProgramCache]: Analyzing trace with hash -377623928, now seen corresponding path program 1 times [2022-11-16 20:23:39,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:39,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765818920] [2022-11-16 20:23:39,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:39,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:41,904 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 20:23:41,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:41,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765818920] [2022-11-16 20:23:41,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765818920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:41,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:41,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 20:23:41,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099051688] [2022-11-16 20:23:41,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:41,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 20:23:41,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:41,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 20:23:41,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-16 20:23:41,906 INFO L87 Difference]: Start difference. First operand 6130 states and 20548 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:43,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:43,362 INFO L93 Difference]: Finished difference Result 7388 states and 24846 transitions. [2022-11-16 20:23:43,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 20:23:43,363 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 20:23:43,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:43,390 INFO L225 Difference]: With dead ends: 7388 [2022-11-16 20:23:43,390 INFO L226 Difference]: Without dead ends: 7388 [2022-11-16 20:23:43,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-11-16 20:23:43,391 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 161 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:43,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 29 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 20:23:43,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7388 states. [2022-11-16 20:23:43,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7388 to 6086. [2022-11-16 20:23:43,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6086 states, 5966 states have (on average 3.418706000670466) internal successors, (20396), 6085 states have internal predecessors, (20396), 0 states have call successors, (0), 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 20:23:43,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6086 states to 6086 states and 20396 transitions. [2022-11-16 20:23:43,509 INFO L78 Accepts]: Start accepts. Automaton has 6086 states and 20396 transitions. Word has length 19 [2022-11-16 20:23:43,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:43,510 INFO L495 AbstractCegarLoop]: Abstraction has 6086 states and 20396 transitions. [2022-11-16 20:23:43,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:23:43,510 INFO L276 IsEmpty]: Start isEmpty. Operand 6086 states and 20396 transitions. [2022-11-16 20:23:43,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 20:23:43,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:43,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:43,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 20:23:43,514 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:43,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:43,514 INFO L85 PathProgramCache]: Analyzing trace with hash -157034160, now seen corresponding path program 1 times [2022-11-16 20:23:43,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:43,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994280478] [2022-11-16 20:23:43,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:43,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:43,773 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 20:23:43,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:43,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994280478] [2022-11-16 20:23:43,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994280478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:43,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:43,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:23:43,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042107012] [2022-11-16 20:23:43,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:43,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:23:43,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:43,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:23:43,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:23:43,777 INFO L87 Difference]: Start difference. First operand 6086 states and 20396 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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 20:23:44,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:44,013 INFO L93 Difference]: Finished difference Result 2314 states and 6717 transitions. [2022-11-16 20:23:44,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:23:44,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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 20 [2022-11-16 20:23:44,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:44,021 INFO L225 Difference]: With dead ends: 2314 [2022-11-16 20:23:44,021 INFO L226 Difference]: Without dead ends: 2314 [2022-11-16 20:23:44,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 20:23:44,022 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 31 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:44,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 6 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:23:44,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-11-16 20:23:44,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2290. [2022-11-16 20:23:44,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 2226 states have (on average 2.9797843665768196) internal successors, (6633), 2289 states have internal predecessors, (6633), 0 states have call successors, (0), 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 20:23:44,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 6633 transitions. [2022-11-16 20:23:44,069 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 6633 transitions. Word has length 20 [2022-11-16 20:23:44,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:44,070 INFO L495 AbstractCegarLoop]: Abstraction has 2290 states and 6633 transitions. [2022-11-16 20:23:44,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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 20:23:44,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 6633 transitions. [2022-11-16 20:23:44,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 20:23:44,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:44,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:44,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 20:23:44,074 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:44,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:44,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1551690692, now seen corresponding path program 1 times [2022-11-16 20:23:44,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:44,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116593942] [2022-11-16 20:23:44,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:44,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:44,408 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 20:23:44,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:44,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116593942] [2022-11-16 20:23:44,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116593942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:44,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:44,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:23:44,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965236231] [2022-11-16 20:23:44,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:44,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:23:44,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:44,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:23:44,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:23:44,411 INFO L87 Difference]: Start difference. First operand 2290 states and 6633 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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 20:23:44,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:44,626 INFO L93 Difference]: Finished difference Result 1164 states and 3379 transitions. [2022-11-16 20:23:44,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:23:44,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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 22 [2022-11-16 20:23:44,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:44,629 INFO L225 Difference]: With dead ends: 1164 [2022-11-16 20:23:44,629 INFO L226 Difference]: Without dead ends: 1164 [2022-11-16 20:23:44,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:23:44,630 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 71 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:44,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 7 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:23:44,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-11-16 20:23:44,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1019. [2022-11-16 20:23:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1001 states have (on average 2.895104895104895) internal successors, (2898), 1018 states have internal predecessors, (2898), 0 states have call successors, (0), 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 20:23:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 2898 transitions. [2022-11-16 20:23:44,653 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 2898 transitions. Word has length 22 [2022-11-16 20:23:44,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:44,655 INFO L495 AbstractCegarLoop]: Abstraction has 1019 states and 2898 transitions. [2022-11-16 20:23:44,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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 20:23:44,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 2898 transitions. [2022-11-16 20:23:44,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 20:23:44,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:44,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:44,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 20:23:44,658 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:44,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:44,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1817311909, now seen corresponding path program 1 times [2022-11-16 20:23:44,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:44,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199431903] [2022-11-16 20:23:44,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:44,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:47,625 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 20:23:47,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:47,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199431903] [2022-11-16 20:23:47,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199431903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:47,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:47,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 20:23:47,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495922941] [2022-11-16 20:23:47,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:47,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 20:23:47,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:47,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 20:23:47,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-16 20:23:47,627 INFO L87 Difference]: Start difference. First operand 1019 states and 2898 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 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 20:23:49,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:49,226 INFO L93 Difference]: Finished difference Result 2137 states and 6075 transitions. [2022-11-16 20:23:49,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 20:23:49,226 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2022-11-16 20:23:49,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:49,230 INFO L225 Difference]: With dead ends: 2137 [2022-11-16 20:23:49,230 INFO L226 Difference]: Without dead ends: 2137 [2022-11-16 20:23:49,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-11-16 20:23:49,231 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 140 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:49,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 54 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 20:23:49,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2022-11-16 20:23:49,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1177. [2022-11-16 20:23:49,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1159 states have (on average 2.916307161345988) internal successors, (3380), 1176 states have internal predecessors, (3380), 0 states have call successors, (0), 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 20:23:49,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 3380 transitions. [2022-11-16 20:23:49,257 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 3380 transitions. Word has length 24 [2022-11-16 20:23:49,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:49,257 INFO L495 AbstractCegarLoop]: Abstraction has 1177 states and 3380 transitions. [2022-11-16 20:23:49,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 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 20:23:49,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 3380 transitions. [2022-11-16 20:23:49,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 20:23:49,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:49,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:49,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-16 20:23:49,260 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:49,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:49,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1283959265, now seen corresponding path program 2 times [2022-11-16 20:23:49,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:49,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304959702] [2022-11-16 20:23:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:49,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:51,260 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 20:23:51,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:51,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304959702] [2022-11-16 20:23:51,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304959702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:51,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:51,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 20:23:51,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12308904] [2022-11-16 20:23:51,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:51,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 20:23:51,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:51,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 20:23:51,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 20:23:51,263 INFO L87 Difference]: Start difference. First operand 1177 states and 3380 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 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 20:23:52,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:52,106 INFO L93 Difference]: Finished difference Result 2723 states and 7542 transitions. [2022-11-16 20:23:52,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 20:23:52,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2022-11-16 20:23:52,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:52,114 INFO L225 Difference]: With dead ends: 2723 [2022-11-16 20:23:52,115 INFO L226 Difference]: Without dead ends: 2723 [2022-11-16 20:23:52,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-11-16 20:23:52,117 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 156 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:52,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 38 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 20:23:52,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2022-11-16 20:23:52,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 1221. [2022-11-16 20:23:52,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1203 states have (on average 2.9301745635910224) internal successors, (3525), 1220 states have internal predecessors, (3525), 0 states have call successors, (0), 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 20:23:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3525 transitions. [2022-11-16 20:23:52,166 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3525 transitions. Word has length 24 [2022-11-16 20:23:52,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:52,167 INFO L495 AbstractCegarLoop]: Abstraction has 1221 states and 3525 transitions. [2022-11-16 20:23:52,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 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 20:23:52,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3525 transitions. [2022-11-16 20:23:52,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 20:23:52,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:52,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:52,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 20:23:52,171 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2022-11-16 20:23:52,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:52,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1143989723, now seen corresponding path program 3 times [2022-11-16 20:23:52,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:52,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735798118] [2022-11-16 20:23:52,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:52,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:52,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat