./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ac9738018cdb6c628ad42533cfecc5c9af778919d271278199945a85d10a362 --- 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-38b53e6 [2022-11-25 22:36:52,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:36:52,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:36:52,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:36:52,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:36:52,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:36:52,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:36:52,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:36:52,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:36:52,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:36:52,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:36:52,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:36:52,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:36:52,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:36:52,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:36:52,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:36:52,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:36:52,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:36:52,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:36:52,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:36:52,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:36:52,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:36:52,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:36:52,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:36:52,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:36:52,432 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:36:52,433 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:36:52,434 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:36:52,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:36:52,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:36:52,436 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:36:52,437 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:36:52,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:36:52,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:36:52,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:36:52,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:36:52,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:36:52,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:36:52,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:36:52,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:36:52,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:36:52,444 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:36:52,468 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:36:52,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:36:52,469 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:36:52,469 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:36:52,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:36:52,470 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:36:52,471 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:36:52,471 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:36:52,471 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:36:52,472 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:36:52,472 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:36:52,472 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:36:52,473 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:36:52,473 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:36:52,473 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:36:52,473 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:36:52,474 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:36:52,474 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:36:52,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:36:52,475 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:36:52,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:36:52,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:36:52,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:36:52,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:36:52,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:36:52,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:36:52,476 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:36:52,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:36:52,477 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:36:52,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:36:52,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:36:52,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:36:52,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:36:52,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:36:52,479 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:36:52,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:36:52,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:36:52,479 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:36:52,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:36:52,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:36:52,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:36:52,480 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_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ac9738018cdb6c628ad42533cfecc5c9af778919d271278199945a85d10a362 [2022-11-25 22:36:52,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:36:52,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:36:52,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:36:52,770 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:36:52,770 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:36:52,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-25 22:36:55,902 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:36:56,130 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:36:56,130 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-25 22:36:56,139 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/data/b09e9e39f/25ca67ade1824f31b0e8afff184fc813/FLAG9dda070e3 [2022-11-25 22:36:56,154 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/data/b09e9e39f/25ca67ade1824f31b0e8afff184fc813 [2022-11-25 22:36:56,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:36:56,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:36:56,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:36:56,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:36:56,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:36:56,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:36:56" (1/1) ... [2022-11-25 22:36:56,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8019ca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:56, skipping insertion in model container [2022-11-25 22:36:56,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:36:56" (1/1) ... [2022-11-25 22:36:56,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:36:56,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:36:56,398 WARN L237 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_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4411,4424] [2022-11-25 22:36:56,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:36:56,453 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:36:56,486 WARN L237 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_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4411,4424] [2022-11-25 22:36:56,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:36:56,521 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:36:56,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:56 WrapperNode [2022-11-25 22:36:56,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:36:56,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:36:56,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:36:56,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:36:56,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:56" (1/1) ... [2022-11-25 22:36:56,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:56" (1/1) ... [2022-11-25 22:36:56,577 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 329 [2022-11-25 22:36:56,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:36:56,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:36:56,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:36:56,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:36:56,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:56" (1/1) ... [2022-11-25 22:36:56,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:56" (1/1) ... [2022-11-25 22:36:56,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:56" (1/1) ... [2022-11-25 22:36:56,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:56" (1/1) ... [2022-11-25 22:36:56,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:56" (1/1) ... [2022-11-25 22:36:56,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:56" (1/1) ... [2022-11-25 22:36:56,614 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:56" (1/1) ... [2022-11-25 22:36:56,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:56" (1/1) ... [2022-11-25 22:36:56,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:36:56,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:36:56,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:36:56,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:36:56,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:56" (1/1) ... [2022-11-25 22:36:56,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:36:56,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:56,654 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:36:56,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:36:56,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:36:56,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:36:56,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:36:56,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:36:56,808 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:36:56,810 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:36:57,289 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:36:57,522 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:36:57,523 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 22:36:57,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:36:57 BoogieIcfgContainer [2022-11-25 22:36:57,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:36:57,531 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:36:57,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:36:57,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:36:57,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:36:56" (1/3) ... [2022-11-25 22:36:57,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2351fe29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:36:57, skipping insertion in model container [2022-11-25 22:36:57,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:56" (2/3) ... [2022-11-25 22:36:57,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2351fe29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:36:57, skipping insertion in model container [2022-11-25 22:36:57,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:36:57" (3/3) ... [2022-11-25 22:36:57,540 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-25 22:36:57,561 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:36:57,561 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:36:57,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:36:57,622 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@2d16bbc5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:36:57,622 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:36:57,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 63 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:57,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 22:36:57,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:57,634 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, 1, 1, 1, 1] [2022-11-25 22:36:57,635 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:57,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash 516770625, now seen corresponding path program 1 times [2022-11-25 22:36:57,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:57,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629132403] [2022-11-25 22:36:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:57,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:58,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:58,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629132403] [2022-11-25 22:36:58,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629132403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:36:58,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:36:58,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:36:58,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309901379] [2022-11-25 22:36:58,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:36:58,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:36:58,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:58,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:36:58,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:58,111 INFO L87 Difference]: Start difference. First operand has 64 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 63 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:58,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:58,248 INFO L93 Difference]: Finished difference Result 143 states and 218 transitions. [2022-11-25 22:36:58,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:36:58,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2022-11-25 22:36:58,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:58,263 INFO L225 Difference]: With dead ends: 143 [2022-11-25 22:36:58,263 INFO L226 Difference]: Without dead ends: 94 [2022-11-25 22:36:58,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:58,270 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 74 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:58,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 188 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:36:58,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-25 22:36:58,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-11-25 22:36:58,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.4065934065934067) internal successors, (128), 91 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:58,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 128 transitions. [2022-11-25 22:36:58,342 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 128 transitions. Word has length 28 [2022-11-25 22:36:58,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:58,343 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 128 transitions. [2022-11-25 22:36:58,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:58,344 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 128 transitions. [2022-11-25 22:36:58,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 22:36:58,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:58,347 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:58,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:36:58,348 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:58,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:58,350 INFO L85 PathProgramCache]: Analyzing trace with hash -648191395, now seen corresponding path program 1 times [2022-11-25 22:36:58,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:58,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083294204] [2022-11-25 22:36:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:58,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:58,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:58,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083294204] [2022-11-25 22:36:58,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083294204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:36:58,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:36:58,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:36:58,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262727514] [2022-11-25 22:36:58,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:36:58,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:36:58,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:58,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:36:58,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:58,485 INFO L87 Difference]: Start difference. First operand 92 states and 128 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:58,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:58,582 INFO L93 Difference]: Finished difference Result 216 states and 312 transitions. [2022-11-25 22:36:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:36:58,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-25 22:36:58,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:58,590 INFO L225 Difference]: With dead ends: 216 [2022-11-25 22:36:58,590 INFO L226 Difference]: Without dead ends: 143 [2022-11-25 22:36:58,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:58,598 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 56 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:58,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 150 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:36:58,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-25 22:36:58,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2022-11-25 22:36:58,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.4285714285714286) internal successors, (200), 140 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 200 transitions. [2022-11-25 22:36:58,657 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 200 transitions. Word has length 31 [2022-11-25 22:36:58,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:58,659 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 200 transitions. [2022-11-25 22:36:58,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:58,659 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 200 transitions. [2022-11-25 22:36:58,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 22:36:58,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:58,663 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:58,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:36:58,667 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:58,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:58,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1868502125, now seen corresponding path program 1 times [2022-11-25 22:36:58,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:58,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211811520] [2022-11-25 22:36:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:58,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:58,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:58,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211811520] [2022-11-25 22:36:58,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211811520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:36:58,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:36:58,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:36:58,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376802828] [2022-11-25 22:36:58,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:36:58,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:36:58,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:58,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:36:58,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:58,788 INFO L87 Difference]: Start difference. First operand 141 states and 200 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:58,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:58,866 INFO L93 Difference]: Finished difference Result 341 states and 494 transitions. [2022-11-25 22:36:58,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:36:58,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-25 22:36:58,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:58,870 INFO L225 Difference]: With dead ends: 341 [2022-11-25 22:36:58,870 INFO L226 Difference]: Without dead ends: 219 [2022-11-25 22:36:58,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:58,890 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 51 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:58,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 135 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:36:58,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-25 22:36:58,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2022-11-25 22:36:58,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.4259259259259258) internal successors, (308), 216 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:58,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 308 transitions. [2022-11-25 22:36:58,937 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 308 transitions. Word has length 34 [2022-11-25 22:36:58,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:58,937 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 308 transitions. [2022-11-25 22:36:58,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:58,938 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 308 transitions. [2022-11-25 22:36:58,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 22:36:58,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:58,939 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:58,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:36:58,939 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:58,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:58,940 INFO L85 PathProgramCache]: Analyzing trace with hash 524170856, now seen corresponding path program 1 times [2022-11-25 22:36:58,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:58,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995790167] [2022-11-25 22:36:58,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:58,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:59,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:59,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995790167] [2022-11-25 22:36:59,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995790167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:36:59,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:36:59,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 22:36:59,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109497999] [2022-11-25 22:36:59,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:36:59,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:36:59,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:59,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:36:59,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:36:59,126 INFO L87 Difference]: Start difference. First operand 217 states and 308 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:59,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:59,348 INFO L93 Difference]: Finished difference Result 703 states and 1007 transitions. [2022-11-25 22:36:59,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:36:59,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-25 22:36:59,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:59,351 INFO L225 Difference]: With dead ends: 703 [2022-11-25 22:36:59,351 INFO L226 Difference]: Without dead ends: 505 [2022-11-25 22:36:59,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:36:59,364 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 132 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:59,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 269 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:36:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-11-25 22:36:59,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 501. [2022-11-25 22:36:59,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.424) internal successors, (712), 500 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:59,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 712 transitions. [2022-11-25 22:36:59,543 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 712 transitions. Word has length 37 [2022-11-25 22:36:59,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:59,543 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 712 transitions. [2022-11-25 22:36:59,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:59,544 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 712 transitions. [2022-11-25 22:36:59,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 22:36:59,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:59,549 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:59,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:36:59,549 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:59,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:59,550 INFO L85 PathProgramCache]: Analyzing trace with hash -671286785, now seen corresponding path program 1 times [2022-11-25 22:36:59,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:59,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161148463] [2022-11-25 22:36:59,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:59,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:59,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:59,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161148463] [2022-11-25 22:36:59,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161148463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:36:59,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:36:59,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:36:59,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886844090] [2022-11-25 22:36:59,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:36:59,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:36:59,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:59,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:36:59,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:36:59,703 INFO L87 Difference]: Start difference. First operand 501 states and 712 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:37:00,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:37:00,127 INFO L93 Difference]: Finished difference Result 1283 states and 1846 transitions. [2022-11-25 22:37:00,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:37:00,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-25 22:37:00,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:37:00,134 INFO L225 Difference]: With dead ends: 1283 [2022-11-25 22:37:00,135 INFO L226 Difference]: Without dead ends: 801 [2022-11-25 22:37:00,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:37:00,139 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 336 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:37:00,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 82 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:37:00,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-11-25 22:37:00,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 799. [2022-11-25 22:37:00,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 1.418546365914787) internal successors, (1132), 798 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:37:00,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1132 transitions. [2022-11-25 22:37:00,378 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1132 transitions. Word has length 39 [2022-11-25 22:37:00,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:37:00,379 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1132 transitions. [2022-11-25 22:37:00,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:37:00,380 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1132 transitions. [2022-11-25 22:37:00,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 22:37:00,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:37:00,386 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:37:00,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 22:37:00,386 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:37:00,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:37:00,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1295137542, now seen corresponding path program 1 times [2022-11-25 22:37:00,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:37:00,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953456467] [2022-11-25 22:37:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:37:00,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:37:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:37:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:37:00,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:37:00,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953456467] [2022-11-25 22:37:00,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953456467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:37:00,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:37:00,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 22:37:00,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797598952] [2022-11-25 22:37:00,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:37:00,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:37:00,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:37:00,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:37:00,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:37:00,809 INFO L87 Difference]: Start difference. First operand 799 states and 1132 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:37:01,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:37:01,390 INFO L93 Difference]: Finished difference Result 1478 states and 2095 transitions. [2022-11-25 22:37:01,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 22:37:01,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-25 22:37:01,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:37:01,396 INFO L225 Difference]: With dead ends: 1478 [2022-11-25 22:37:01,397 INFO L226 Difference]: Without dead ends: 1476 [2022-11-25 22:37:01,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-25 22:37:01,400 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 501 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:37:01,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 632 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:37:01,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2022-11-25 22:37:01,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 936. [2022-11-25 22:37:01,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 1.4171122994652405) internal successors, (1325), 935 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:37:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1325 transitions. [2022-11-25 22:37:01,665 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1325 transitions. Word has length 39 [2022-11-25 22:37:01,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:37:01,665 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1325 transitions. [2022-11-25 22:37:01,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:37:01,666 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1325 transitions. [2022-11-25 22:37:01,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 22:37:01,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:37:01,667 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:37:01,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 22:37:01,667 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:37:01,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:37:01,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1538991974, now seen corresponding path program 1 times [2022-11-25 22:37:01,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:37:01,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407958580] [2022-11-25 22:37:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:37:01,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:37:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:37:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:37:02,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:37:02,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407958580] [2022-11-25 22:37:02,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407958580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:37:02,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867858506] [2022-11-25 22:37:02,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:37:02,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:37:02,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:37:02,830 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:37:02,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:37:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:37:02,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 22:37:02,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:37:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:37:04,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:37:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:37:09,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867858506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:37:09,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [615229309] [2022-11-25 22:37:09,835 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-11-25 22:37:09,840 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:37:09,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:37:09,850 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:37:09,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:37:10,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:10,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:10,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-25 22:37:10,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:10,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:10,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:10,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-25 22:42:38,709 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:42:57,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11256#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= ~send3~0 127) (<= ~p3~0 0) (<= 0 ~id3~0) (<= 0 (+ ~p3_new~0 1)) (<= 0 |#NULL.base|) (<= ~st3~0 0) (<= 0 ~__return_6453~0) (<= 0 ~mode1~0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= 0 ~id1~0) (<= ~__return_6348~0 1) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 0 ~mode3~0) (<= ~send1~0 127) (<= ~st1~0 0) (<= 0 (+ ~p3_old~0 1)) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= |#NULL.offset| 0) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= 0 ~st2~0) (<= ~p1~0 0) (<= ~__return_main~0 0) (<= ~mode3~0 1) (<= 0 ~p2~0) (<= 0 ~p3~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= 0 (+ ~p2_old~0 1)) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= |ULTIMATE.start_main_~main__i2~0#1| 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= (+ ~p2_new~0 1) 0) (<= |#NULL.base| 0) (<= 1 ~__return_6348~0) (<= 0 ~__return_main~0) (<= ~id3~0 127) (<= 0 ~id2~0) (<= 0 (+ ~nomsg~0 1)) (<= ~p2~0 0) (<= 0 ~mode2~0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= (+ ~p3_new~0 1) 0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |#NULL.offset|) (<= (+ ~p2_old~0 1) 0) (<= 0 (+ ~p1_new~0 1)) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= 0 ~send3~0) (<= 0 ~p1~0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (<= ~__return_6453~0 1) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|))' at error location [2022-11-25 22:42:57,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:42:57,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:42:57,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 38 [2022-11-25 22:42:57,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020515140] [2022-11-25 22:42:57,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:42:57,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 22:42:57,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:42:57,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 22:42:57,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=767, Invalid=4783, Unknown=0, NotChecked=0, Total=5550 [2022-11-25 22:42:57,925 INFO L87 Difference]: Start difference. First operand 936 states and 1325 transitions. Second operand has 38 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 38 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:33,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:43:33,189 INFO L93 Difference]: Finished difference Result 10981 states and 15508 transitions. [2022-11-25 22:43:33,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-11-25 22:43:33,189 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 38 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-25 22:43:33,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:43:33,228 INFO L225 Difference]: With dead ends: 10981 [2022-11-25 22:43:33,228 INFO L226 Difference]: Without dead ends: 10092 [2022-11-25 22:43:33,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24702 ImplicationChecksByTransitivity, 47.6s TimeCoverageRelationStatistics Valid=8614, Invalid=48746, Unknown=0, NotChecked=0, Total=57360 [2022-11-25 22:43:33,251 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 6916 mSDsluCounter, 2116 mSDsCounter, 0 mSdLazyCounter, 2951 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6916 SdHoareTripleChecker+Valid, 2262 SdHoareTripleChecker+Invalid, 3362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 2951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:43:33,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6916 Valid, 2262 Invalid, 3362 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [411 Valid, 2951 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-25 22:43:33,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10092 states. [2022-11-25 22:43:34,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10092 to 4591. [2022-11-25 22:43:34,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4591 states, 4590 states have (on average 1.3775599128540306) internal successors, (6323), 4590 states have internal predecessors, (6323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:34,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 6323 transitions. [2022-11-25 22:43:34,785 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 6323 transitions. Word has length 47 [2022-11-25 22:43:34,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:43:34,785 INFO L495 AbstractCegarLoop]: Abstraction has 4591 states and 6323 transitions. [2022-11-25 22:43:34,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 38 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:34,786 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 6323 transitions. [2022-11-25 22:43:34,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 22:43:34,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:43:34,787 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:43:34,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:43:34,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:43:34,994 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:43:34,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:43:34,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1610351683, now seen corresponding path program 1 times [2022-11-25 22:43:34,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:43:34,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218747423] [2022-11-25 22:43:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:43:34,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:43:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:43:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:43:35,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:43:35,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218747423] [2022-11-25 22:43:35,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218747423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:43:35,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:43:35,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:43:35,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542245240] [2022-11-25 22:43:35,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:43:35,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:43:35,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:43:35,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:43:35,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:43:35,109 INFO L87 Difference]: Start difference. First operand 4591 states and 6323 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:37,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:43:37,554 INFO L93 Difference]: Finished difference Result 11576 states and 16083 transitions. [2022-11-25 22:43:37,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:43:37,554 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-25 22:43:37,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:43:37,578 INFO L225 Difference]: With dead ends: 11576 [2022-11-25 22:43:37,579 INFO L226 Difference]: Without dead ends: 7054 [2022-11-25 22:43:37,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:43:37,585 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 317 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:43:37,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 92 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:43:37,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7054 states. [2022-11-25 22:43:40,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7054 to 7052. [2022-11-25 22:43:40,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7052 states, 7051 states have (on average 1.377109629839739) internal successors, (9710), 7051 states have internal predecessors, (9710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7052 states to 7052 states and 9710 transitions. [2022-11-25 22:43:40,077 INFO L78 Accepts]: Start accepts. Automaton has 7052 states and 9710 transitions. Word has length 47 [2022-11-25 22:43:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:43:40,077 INFO L495 AbstractCegarLoop]: Abstraction has 7052 states and 9710 transitions. [2022-11-25 22:43:40,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:43:40,078 INFO L276 IsEmpty]: Start isEmpty. Operand 7052 states and 9710 transitions. [2022-11-25 22:43:40,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 22:43:40,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:43:40,079 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:43:40,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 22:43:40,080 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:43:40,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:43:40,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1870203618, now seen corresponding path program 1 times [2022-11-25 22:43:40,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:43:40,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734991258] [2022-11-25 22:43:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:43:40,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:43:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:43:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:43:40,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:43:40,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734991258] [2022-11-25 22:43:40,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734991258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:43:40,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704656025] [2022-11-25 22:43:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:43:40,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:43:40,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:43:40,947 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:43:40,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:43:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:43:41,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 22:43:41,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:43:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:43:42,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:43:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:43:46,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704656025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:43:46,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [506527148] [2022-11-25 22:43:46,211 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-11-25 22:43:46,211 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:43:46,212 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:43:46,212 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:43:46,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:43:46,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:43:46,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:43:46,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:43:46,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-25 22:43:46,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:43:46,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:43:46,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-25 22:44:11,425 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:44:26,075 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '66972#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= 0 ~id3~0) (<= 0 (+ ~p3_new~0 1)) (<= 0 ~__return_6453~0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= 0 (+ ~p1_old~0 1)) (<= 0 ~id1~0) (<= ~__return_6348~0 1) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 0 ~mode3~0) (<= ~send1~0 127) (<= ~st1~0 0) (<= 0 (+ ~p3_old~0 1)) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= |#NULL.offset| 0) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= 0 ~st2~0) (<= ~p1~0 0) (<= ~__return_main~0 0) (<= ~mode3~0 1) (<= 0 ~p2~0) (<= 0 ~send2~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= ~send2~0 127) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= |ULTIMATE.start_main_~main__i2~0#1| 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= ~st2~0 0) (<= (+ ~p2_new~0 1) 0) (<= 1 ~__return_6348~0) (<= 0 ~__return_main~0) (<= ~id3~0 127) (<= 0 ~id2~0) (<= 0 (+ ~nomsg~0 1)) (<= ~p2~0 0) (<= 0 ~mode2~0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= (+ ~p3_new~0 1) 0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |#NULL.offset|) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (<= 0 (+ ~p1_new~0 1)) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= (+ ~p1_old~0 1) 0) (<= 0 ~p1~0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (<= ~__return_6453~0 1) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:44:26,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:44:26,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:44:26,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 38 [2022-11-25 22:44:26,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404481237] [2022-11-25 22:44:26,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:44:26,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 22:44:26,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:44:26,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 22:44:26,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=753, Invalid=4649, Unknown=0, NotChecked=0, Total=5402 [2022-11-25 22:44:26,078 INFO L87 Difference]: Start difference. First operand 7052 states and 9710 transitions. Second operand has 38 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 38 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:45:09,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:45:09,224 INFO L93 Difference]: Finished difference Result 38247 states and 52661 transitions. [2022-11-25 22:45:09,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-11-25 22:45:09,225 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 38 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-25 22:45:09,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:45:09,306 INFO L225 Difference]: With dead ends: 38247 [2022-11-25 22:45:09,306 INFO L226 Difference]: Without dead ends: 29755 [2022-11-25 22:45:09,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22400 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=7373, Invalid=44383, Unknown=0, NotChecked=0, Total=51756 [2022-11-25 22:45:09,327 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 5580 mSDsluCounter, 2887 mSDsCounter, 0 mSdLazyCounter, 4159 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5580 SdHoareTripleChecker+Valid, 3061 SdHoareTripleChecker+Invalid, 4446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 4159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:45:09,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5580 Valid, 3061 Invalid, 4446 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [287 Valid, 4159 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-25 22:45:09,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29755 states. [2022-11-25 22:45:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29755 to 18361. [2022-11-25 22:45:15,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18361 states, 18360 states have (on average 1.360239651416122) internal successors, (24974), 18360 states have internal predecessors, (24974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:45:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18361 states to 18361 states and 24974 transitions. [2022-11-25 22:45:15,330 INFO L78 Accepts]: Start accepts. Automaton has 18361 states and 24974 transitions. Word has length 47 [2022-11-25 22:45:15,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:45:15,331 INFO L495 AbstractCegarLoop]: Abstraction has 18361 states and 24974 transitions. [2022-11-25 22:45:15,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 38 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:45:15,331 INFO L276 IsEmpty]: Start isEmpty. Operand 18361 states and 24974 transitions. [2022-11-25 22:45:15,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 22:45:15,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:45:15,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:45:15,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:45:15,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 22:45:15,539 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:45:15,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:45:15,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1358678471, now seen corresponding path program 1 times [2022-11-25 22:45:15,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:45:15,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539663045] [2022-11-25 22:45:15,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:45:15,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:45:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:45:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:45:15,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:45:15,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539663045] [2022-11-25 22:45:15,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539663045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:45:15,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:45:15,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:45:15,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175276372] [2022-11-25 22:45:15,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:45:15,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:45:15,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:45:15,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:45:15,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:45:15,643 INFO L87 Difference]: Start difference. First operand 18361 states and 24974 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:45:24,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:45:24,594 INFO L93 Difference]: Finished difference Result 44771 states and 61251 transitions. [2022-11-25 22:45:24,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:45:24,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-25 22:45:24,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:45:24,668 INFO L225 Difference]: With dead ends: 44771 [2022-11-25 22:45:24,668 INFO L226 Difference]: Without dead ends: 26514 [2022-11-25 22:45:24,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:45:24,693 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 292 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:45:24,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 102 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:45:24,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26514 states. [2022-11-25 22:45:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26514 to 26394. [2022-11-25 22:45:34,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26394 states, 26393 states have (on average 1.3572538173000417) internal successors, (35822), 26393 states have internal predecessors, (35822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:45:34,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26394 states to 26394 states and 35822 transitions. [2022-11-25 22:45:34,308 INFO L78 Accepts]: Start accepts. Automaton has 26394 states and 35822 transitions. Word has length 49 [2022-11-25 22:45:34,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:45:34,309 INFO L495 AbstractCegarLoop]: Abstraction has 26394 states and 35822 transitions. [2022-11-25 22:45:34,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:45:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 26394 states and 35822 transitions. [2022-11-25 22:45:34,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 22:45:34,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:45:34,311 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:45:34,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 22:45:34,311 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:45:34,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:45:34,312 INFO L85 PathProgramCache]: Analyzing trace with hash 267486196, now seen corresponding path program 1 times [2022-11-25 22:45:34,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:45:34,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760575533] [2022-11-25 22:45:34,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:45:34,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:45:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:45:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:45:36,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:45:36,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760575533] [2022-11-25 22:45:36,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760575533] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:45:36,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209476310] [2022-11-25 22:45:36,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:45:36,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:45:36,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:45:36,504 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:45:36,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_960f0af9-ae93-4253-91a9-e39ffc5cd7e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:45:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:45:36,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-25 22:45:36,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:45:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:45:38,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:45:43,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:45:43,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209476310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:45:43,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [517703130] [2022-11-25 22:45:43,732 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2022-11-25 22:45:43,732 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:45:43,732 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:45:43,732 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:45:43,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:45:43,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:45:43,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:45:43,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:45:43,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-25 22:45:43,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:45:43,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:45:43,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-25 22:45:55,381 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:46:21,786 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '271147#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= 0 ~id3~0) (<= 0 (+ ~p3_new~0 1)) (<= 0 ~__return_6453~0) (<= 0 ~mode1~0) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= 0 (+ ~p1_old~0 1)) (<= 0 ~id1~0) (<= ~__return_6348~0 1) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 0 ~mode3~0) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= 0 ~st2~0) (<= ~mode3~0 1) (<= 0 ~send2~0) (<= ~id1~0 127) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= ~send2~0 127) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ ~p2_new~0 1)) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= ~st2~0 0) (<= (+ ~p2_new~0 1) 0) (<= 1 ~__return_6348~0) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 ~mode2~0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= (+ ~p3_new~0 1) 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (<= 0 (+ ~p1_new~0 1)) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= (+ ~p1_old~0 1) 0) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (= ~__return_main~0 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (<= ~__return_6453~0 1) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2022-11-25 22:46:21,786 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:46:21,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:46:21,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16, 16] total 52 [2022-11-25 22:46:21,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474523488] [2022-11-25 22:46:21,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:46:21,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-25 22:46:21,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:46:21,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-25 22:46:21,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=975, Invalid=6857, Unknown=0, NotChecked=0, Total=7832 [2022-11-25 22:46:21,789 INFO L87 Difference]: Start difference. First operand 26394 states and 35822 transitions. Second operand has 52 states, 52 states have (on average 2.769230769230769) internal successors, (144), 52 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:48:02,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:48:02,386 INFO L93 Difference]: Finished difference Result 92971 states and 125747 transitions. [2022-11-25 22:48:02,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2022-11-25 22:48:02,387 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.769230769230769) internal successors, (144), 52 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-25 22:48:02,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:48:02,827 INFO L225 Difference]: With dead ends: 92971 [2022-11-25 22:48:02,828 INFO L226 Difference]: Without dead ends: 81571 [2022-11-25 22:48:02,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42670 ImplicationChecksByTransitivity, 85.8s TimeCoverageRelationStatistics Valid=16066, Invalid=87296, Unknown=0, NotChecked=0, Total=103362 [2022-11-25 22:48:02,901 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 8235 mSDsluCounter, 3374 mSDsCounter, 0 mSdLazyCounter, 7336 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8235 SdHoareTripleChecker+Valid, 3580 SdHoareTripleChecker+Invalid, 7596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 7336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:48:02,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8235 Valid, 3580 Invalid, 7596 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [260 Valid, 7336 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-11-25 22:48:02,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81571 states.