./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7 --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 1ce10eed5e4efb099b76f82a3f7c0c762d10c84f4081f704915f3a9577465a3e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:11:09,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:11:09,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:11:09,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:11:09,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:11:09,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:11:09,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:11:09,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:11:09,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:11:09,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:11:09,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:11:09,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:11:09,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:11:09,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:11:09,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:11:09,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:11:09,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:11:09,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:11:09,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:11:09,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:11:09,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:11:09,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:11:09,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:11:09,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:11:09,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:11:09,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:11:09,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:11:09,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:11:09,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:11:09,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:11:09,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:11:09,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:11:09,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:11:09,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:11:09,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:11:09,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:11:09,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:11:09,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:11:09,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:11:09,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:11:09,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:11:09,718 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:11:09,749 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:11:09,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:11:09,750 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:11:09,750 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:11:09,756 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:11:09,757 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:11:09,757 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:11:09,757 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:11:09,757 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:11:09,757 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:11:09,758 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:11:09,759 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:11:09,759 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:11:09,759 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:11:09,759 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:11:09,759 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:11:09,759 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:11:09,760 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:11:09,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:11:09,760 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:11:09,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:11:09,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:11:09,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:11:09,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:11:09,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:11:09,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:11:09,763 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:11:09,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:11:09,763 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:11:09,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:11:09,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:11:09,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:11:09,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:11:09,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:11:09,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:11:09,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:11:09,765 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:11:09,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:11:09,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:11:09,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:11:09,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:11:09,766 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ce10eed5e4efb099b76f82a3f7c0c762d10c84f4081f704915f3a9577465a3e [2021-11-25 18:11:09,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:11:10,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:11:10,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:11:10,020 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:11:10,021 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:11:10,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-25 18:11:10,108 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7/data/e619f8fdb/5990316875f94a51ab23283c1ddc44b8/FLAGc705364f1 [2021-11-25 18:11:10,605 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:11:10,606 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-25 18:11:10,630 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7/data/e619f8fdb/5990316875f94a51ab23283c1ddc44b8/FLAGc705364f1 [2021-11-25 18:11:10,911 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7/data/e619f8fdb/5990316875f94a51ab23283c1ddc44b8 [2021-11-25 18:11:10,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:11:10,914 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:11:10,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:11:10,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:11:10,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:11:10,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:11:10" (1/1) ... [2021-11-25 18:11:10,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@321799c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:10, skipping insertion in model container [2021-11-25 18:11:10,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:11:10" (1/1) ... [2021-11-25 18:11:10,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:11:11,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:11:11,306 WARN L230 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_2046a0c7-a983-49ac-aab7-c81e38a12e61/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13672,13685] [2021-11-25 18:11:11,411 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:11:11,437 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:11:11,543 WARN L230 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_2046a0c7-a983-49ac-aab7-c81e38a12e61/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13672,13685] [2021-11-25 18:11:11,582 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:11:11,614 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:11:11,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:11 WrapperNode [2021-11-25 18:11:11,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:11:11,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:11:11,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:11:11,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:11:11,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:11" (1/1) ... [2021-11-25 18:11:11,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:11" (1/1) ... [2021-11-25 18:11:11,717 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1364 [2021-11-25 18:11:11,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:11:11,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:11:11,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:11:11,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:11:11,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:11" (1/1) ... [2021-11-25 18:11:11,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:11" (1/1) ... [2021-11-25 18:11:11,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:11" (1/1) ... [2021-11-25 18:11:11,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:11" (1/1) ... [2021-11-25 18:11:11,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:11" (1/1) ... [2021-11-25 18:11:11,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:11" (1/1) ... [2021-11-25 18:11:11,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:11" (1/1) ... [2021-11-25 18:11:11,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:11:11,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:11:11,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:11:11,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:11:11,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:11" (1/1) ... [2021-11-25 18:11:11,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:11:11,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:11:11,846 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:11:11,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:11:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:11:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:11:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:11:11,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:11:12,119 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:11:12,121 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:11:13,109 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:11:13,490 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:11:13,491 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:11:13,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:11:13 BoogieIcfgContainer [2021-11-25 18:11:13,495 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:11:13,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:11:13,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:11:13,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:11:13,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:11:10" (1/3) ... [2021-11-25 18:11:13,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c7929eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:11:13, skipping insertion in model container [2021-11-25 18:11:13,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:11" (2/3) ... [2021-11-25 18:11:13,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c7929eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:11:13, skipping insertion in model container [2021-11-25 18:11:13,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:11:13" (3/3) ... [2021-11-25 18:11:13,505 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-25 18:11:13,516 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:11:13,516 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:11:13,559 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:11:13,566 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:11:13,566 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:11:13,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 275 states, 273 states have (on average 1.6923076923076923) internal successors, (462), 274 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:13,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-25 18:11:13,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:13,614 INFO L514 BasicCegarLoop]: 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, 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, 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] [2021-11-25 18:11:13,615 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:13,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:13,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1155845507, now seen corresponding path program 1 times [2021-11-25 18:11:13,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:13,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348276483] [2021-11-25 18:11:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:13,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:11:14,199 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:14,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348276483] [2021-11-25 18:11:14,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348276483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:14,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:14,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:11:14,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561063302] [2021-11-25 18:11:14,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:14,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:11:14,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:14,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:11:14,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:11:14,250 INFO L87 Difference]: Start difference. First operand has 275 states, 273 states have (on average 1.6923076923076923) internal successors, (462), 274 states have internal predecessors, (462), 0 states have call successors, (0), 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 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:14,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:14,479 INFO L93 Difference]: Finished difference Result 469 states and 779 transitions. [2021-11-25 18:11:14,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:11:14,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-11-25 18:11:14,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:14,496 INFO L225 Difference]: With dead ends: 469 [2021-11-25 18:11:14,496 INFO L226 Difference]: Without dead ends: 358 [2021-11-25 18:11:14,500 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:11:14,503 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 179 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:14,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 939 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:11:14,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-25 18:11:14,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 356. [2021-11-25 18:11:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.5464788732394366) internal successors, (549), 355 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 549 transitions. [2021-11-25 18:11:14,577 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 549 transitions. Word has length 109 [2021-11-25 18:11:14,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:14,581 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 549 transitions. [2021-11-25 18:11:14,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:14,582 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 549 transitions. [2021-11-25 18:11:14,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-25 18:11:14,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:14,591 INFO L514 BasicCegarLoop]: 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, 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, 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] [2021-11-25 18:11:14,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:11:14,592 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:14,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:14,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1728781004, now seen corresponding path program 1 times [2021-11-25 18:11:14,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:14,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145151599] [2021-11-25 18:11:14,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:14,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:11:14,860 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:14,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145151599] [2021-11-25 18:11:14,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145151599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:14,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:14,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:11:14,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944725385] [2021-11-25 18:11:14,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:14,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:11:14,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:14,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:11:14,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:11:14,866 INFO L87 Difference]: Start difference. First operand 356 states and 549 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:15,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:15,019 INFO L93 Difference]: Finished difference Result 650 states and 1030 transitions. [2021-11-25 18:11:15,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:11:15,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-11-25 18:11:15,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:15,028 INFO L225 Difference]: With dead ends: 650 [2021-11-25 18:11:15,029 INFO L226 Difference]: Without dead ends: 462 [2021-11-25 18:11:15,037 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:11:15,039 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 163 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:15,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 715 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:11:15,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-25 18:11:15,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2021-11-25 18:11:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5599128540305012) internal successors, (716), 459 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 716 transitions. [2021-11-25 18:11:15,087 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 716 transitions. Word has length 111 [2021-11-25 18:11:15,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:15,092 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 716 transitions. [2021-11-25 18:11:15,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:15,092 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 716 transitions. [2021-11-25 18:11:15,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-25 18:11:15,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:15,106 INFO L514 BasicCegarLoop]: 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, 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, 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] [2021-11-25 18:11:15,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:11:15,107 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:15,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:15,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1784785204, now seen corresponding path program 1 times [2021-11-25 18:11:15,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:15,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404190164] [2021-11-25 18:11:15,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:15,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:11:15,295 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:15,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404190164] [2021-11-25 18:11:15,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404190164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:15,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:15,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:11:15,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14360316] [2021-11-25 18:11:15,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:15,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:11:15,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:15,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:11:15,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:11:15,300 INFO L87 Difference]: Start difference. First operand 460 states and 716 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:15,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:15,460 INFO L93 Difference]: Finished difference Result 980 states and 1565 transitions. [2021-11-25 18:11:15,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:11:15,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2021-11-25 18:11:15,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:15,467 INFO L225 Difference]: With dead ends: 980 [2021-11-25 18:11:15,467 INFO L226 Difference]: Without dead ends: 690 [2021-11-25 18:11:15,469 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:11:15,476 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 162 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:15,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 813 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:11:15,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-11-25 18:11:15,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 688. [2021-11-25 18:11:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 1.5822416302765647) internal successors, (1087), 687 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:15,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 1087 transitions. [2021-11-25 18:11:15,516 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 1087 transitions. Word has length 114 [2021-11-25 18:11:15,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:15,518 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 1087 transitions. [2021-11-25 18:11:15,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 1087 transitions. [2021-11-25 18:11:15,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 18:11:15,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:15,520 INFO L514 BasicCegarLoop]: 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, 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, 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] [2021-11-25 18:11:15,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:11:15,521 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:15,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:15,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1325297440, now seen corresponding path program 1 times [2021-11-25 18:11:15,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:15,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377689752] [2021-11-25 18:11:15,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:15,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:11:15,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:15,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377689752] [2021-11-25 18:11:15,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377689752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:15,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:15,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:11:15,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128213723] [2021-11-25 18:11:15,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:15,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:11:15,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:15,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:11:15,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:11:15,641 INFO L87 Difference]: Start difference. First operand 688 states and 1087 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:15,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:15,767 INFO L93 Difference]: Finished difference Result 1518 states and 2440 transitions. [2021-11-25 18:11:15,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:11:15,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2021-11-25 18:11:15,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:15,774 INFO L225 Difference]: With dead ends: 1518 [2021-11-25 18:11:15,774 INFO L226 Difference]: Without dead ends: 1000 [2021-11-25 18:11:15,776 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:11:15,783 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 161 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:15,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 731 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:11:15,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-11-25 18:11:15,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 998. [2021-11-25 18:11:15,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 1.5957873620862588) internal successors, (1591), 997 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:15,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1591 transitions. [2021-11-25 18:11:15,845 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1591 transitions. Word has length 116 [2021-11-25 18:11:15,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:15,845 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 1591 transitions. [2021-11-25 18:11:15,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:15,846 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1591 transitions. [2021-11-25 18:11:15,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-25 18:11:15,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:15,847 INFO L514 BasicCegarLoop]: 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, 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, 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] [2021-11-25 18:11:15,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:11:15,848 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:15,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:15,849 INFO L85 PathProgramCache]: Analyzing trace with hash 307511751, now seen corresponding path program 1 times [2021-11-25 18:11:15,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:15,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449691108] [2021-11-25 18:11:15,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:15,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:11:15,954 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:15,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449691108] [2021-11-25 18:11:15,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449691108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:15,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:15,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:11:15,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865683028] [2021-11-25 18:11:15,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:15,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:11:15,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:15,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:11:15,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:11:15,956 INFO L87 Difference]: Start difference. First operand 998 states and 1591 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:16,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:16,116 INFO L93 Difference]: Finished difference Result 2430 states and 3924 transitions. [2021-11-25 18:11:16,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:11:16,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-11-25 18:11:16,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:16,129 INFO L225 Difference]: With dead ends: 2430 [2021-11-25 18:11:16,129 INFO L226 Difference]: Without dead ends: 1624 [2021-11-25 18:11:16,131 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:11:16,132 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 155 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:16,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 779 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:11:16,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2021-11-25 18:11:16,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1622. [2021-11-25 18:11:16,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 1.6033312769895127) internal successors, (2599), 1621 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:16,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2599 transitions. [2021-11-25 18:11:16,245 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2599 transitions. Word has length 119 [2021-11-25 18:11:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:16,246 INFO L470 AbstractCegarLoop]: Abstraction has 1622 states and 2599 transitions. [2021-11-25 18:11:16,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2599 transitions. [2021-11-25 18:11:16,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-25 18:11:16,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:16,257 INFO L514 BasicCegarLoop]: 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, 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, 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] [2021-11-25 18:11:16,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:11:16,258 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:16,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:16,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1696089555, now seen corresponding path program 1 times [2021-11-25 18:11:16,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:16,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438543313] [2021-11-25 18:11:16,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:16,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:11:16,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:16,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438543313] [2021-11-25 18:11:16,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438543313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:16,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:16,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:11:16,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289685692] [2021-11-25 18:11:16,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:16,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:11:16,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:16,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:11:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:11:16,371 INFO L87 Difference]: Start difference. First operand 1622 states and 2599 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:16,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:16,582 INFO L93 Difference]: Finished difference Result 3880 states and 6271 transitions. [2021-11-25 18:11:16,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:11:16,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-11-25 18:11:16,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:16,598 INFO L225 Difference]: With dead ends: 3880 [2021-11-25 18:11:16,599 INFO L226 Difference]: Without dead ends: 2450 [2021-11-25 18:11:16,601 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:11:16,602 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 154 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:16,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 733 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:11:16,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2021-11-25 18:11:16,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2448. [2021-11-25 18:11:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 1.6093175316714343) internal successors, (3938), 2447 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 3938 transitions. [2021-11-25 18:11:16,730 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 3938 transitions. Word has length 121 [2021-11-25 18:11:16,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:16,730 INFO L470 AbstractCegarLoop]: Abstraction has 2448 states and 3938 transitions. [2021-11-25 18:11:16,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:16,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 3938 transitions. [2021-11-25 18:11:16,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-25 18:11:16,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:16,733 INFO L514 BasicCegarLoop]: 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, 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, 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, 1, 1, 1] [2021-11-25 18:11:16,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:11:16,733 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:16,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:16,734 INFO L85 PathProgramCache]: Analyzing trace with hash 809644313, now seen corresponding path program 1 times [2021-11-25 18:11:16,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:16,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022347404] [2021-11-25 18:11:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:16,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:11:16,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:16,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022347404] [2021-11-25 18:11:16,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022347404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:16,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:16,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:11:16,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871252006] [2021-11-25 18:11:16,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:16,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:11:16,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:16,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:11:16,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:11:16,822 INFO L87 Difference]: Start difference. First operand 2448 states and 3938 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:17,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:17,146 INFO L93 Difference]: Finished difference Result 6376 states and 10303 transitions. [2021-11-25 18:11:17,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:11:17,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-11-25 18:11:17,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:17,171 INFO L225 Difference]: With dead ends: 6376 [2021-11-25 18:11:17,171 INFO L226 Difference]: Without dead ends: 4142 [2021-11-25 18:11:17,177 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:11:17,178 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 148 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:17,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 745 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:11:17,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2021-11-25 18:11:17,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 4140. [2021-11-25 18:11:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4140 states, 4139 states have (on average 1.605943464604977) internal successors, (6647), 4139 states have internal predecessors, (6647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:17,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4140 states to 4140 states and 6647 transitions. [2021-11-25 18:11:17,484 INFO L78 Accepts]: Start accepts. Automaton has 4140 states and 6647 transitions. Word has length 124 [2021-11-25 18:11:17,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:17,485 INFO L470 AbstractCegarLoop]: Abstraction has 4140 states and 6647 transitions. [2021-11-25 18:11:17,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:17,485 INFO L276 IsEmpty]: Start isEmpty. Operand 4140 states and 6647 transitions. [2021-11-25 18:11:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-25 18:11:17,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:17,487 INFO L514 BasicCegarLoop]: 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, 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, 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, 1, 1, 1, 1, 1] [2021-11-25 18:11:17,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:11:17,487 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:17,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:17,489 INFO L85 PathProgramCache]: Analyzing trace with hash 941841867, now seen corresponding path program 1 times [2021-11-25 18:11:17,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:17,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322263766] [2021-11-25 18:11:17,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:17,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:11:17,571 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:17,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322263766] [2021-11-25 18:11:17,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322263766] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:17,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:17,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:11:17,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137148063] [2021-11-25 18:11:17,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:17,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:11:17,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:17,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:11:17,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:11:17,573 INFO L87 Difference]: Start difference. First operand 4140 states and 6647 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:18,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:18,016 INFO L93 Difference]: Finished difference Result 10322 states and 16646 transitions. [2021-11-25 18:11:18,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:11:18,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-11-25 18:11:18,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:18,054 INFO L225 Difference]: With dead ends: 10322 [2021-11-25 18:11:18,054 INFO L226 Difference]: Without dead ends: 6396 [2021-11-25 18:11:18,060 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:11:18,060 INFO L933 BasicCegarLoop]: 389 mSDtfsCounter, 147 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:18,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 735 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:11:18,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6396 states. [2021-11-25 18:11:18,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6396 to 6394. [2021-11-25 18:11:18,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6394 states, 6393 states have (on average 1.6081651806663537) internal successors, (10281), 6393 states have internal predecessors, (10281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:18,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6394 states to 6394 states and 10281 transitions. [2021-11-25 18:11:18,481 INFO L78 Accepts]: Start accepts. Automaton has 6394 states and 10281 transitions. Word has length 126 [2021-11-25 18:11:18,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:18,482 INFO L470 AbstractCegarLoop]: Abstraction has 6394 states and 10281 transitions. [2021-11-25 18:11:18,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:18,482 INFO L276 IsEmpty]: Start isEmpty. Operand 6394 states and 10281 transitions. [2021-11-25 18:11:18,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-25 18:11:18,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:18,484 INFO L514 BasicCegarLoop]: 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:11:18,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:11:18,485 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:18,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:18,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1032134, now seen corresponding path program 1 times [2021-11-25 18:11:18,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:18,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118514862] [2021-11-25 18:11:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:18,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:11:18,580 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:18,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118514862] [2021-11-25 18:11:18,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118514862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:18,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:18,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:11:18,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483913900] [2021-11-25 18:11:18,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:18,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:11:18,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:18,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:11:18,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:11:18,583 INFO L87 Difference]: Start difference. First operand 6394 states and 10281 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:19,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:19,545 INFO L93 Difference]: Finished difference Result 16018 states and 25774 transitions. [2021-11-25 18:11:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:11:19,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2021-11-25 18:11:19,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:19,599 INFO L225 Difference]: With dead ends: 16018 [2021-11-25 18:11:19,599 INFO L226 Difference]: Without dead ends: 9860 [2021-11-25 18:11:19,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:11:19,610 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 1268 mSDsluCounter, 3311 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 3585 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:19,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1268 Valid, 3585 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:11:19,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9860 states. [2021-11-25 18:11:20,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9860 to 9846. [2021-11-25 18:11:20,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9846 states, 9845 states have (on average 1.600812595226003) internal successors, (15760), 9845 states have internal predecessors, (15760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:20,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9846 states to 9846 states and 15760 transitions. [2021-11-25 18:11:20,196 INFO L78 Accepts]: Start accepts. Automaton has 9846 states and 15760 transitions. Word has length 129 [2021-11-25 18:11:20,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:20,197 INFO L470 AbstractCegarLoop]: Abstraction has 9846 states and 15760 transitions. [2021-11-25 18:11:20,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 9846 states and 15760 transitions. [2021-11-25 18:11:20,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-25 18:11:20,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:20,200 INFO L514 BasicCegarLoop]: 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:11:20,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:11:20,200 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:20,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:20,201 INFO L85 PathProgramCache]: Analyzing trace with hash -35065858, now seen corresponding path program 1 times [2021-11-25 18:11:20,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:20,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290896197] [2021-11-25 18:11:20,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:20,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:11:20,338 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:20,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290896197] [2021-11-25 18:11:20,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290896197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:20,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:20,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:11:20,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877833214] [2021-11-25 18:11:20,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:20,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:11:20,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:20,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:11:20,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:11:20,340 INFO L87 Difference]: Start difference. First operand 9846 states and 15760 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 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) [2021-11-25 18:11:20,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:20,976 INFO L93 Difference]: Finished difference Result 19458 states and 31177 transitions. [2021-11-25 18:11:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:11:20,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 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 130 [2021-11-25 18:11:20,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:21,007 INFO L225 Difference]: With dead ends: 19458 [2021-11-25 18:11:21,007 INFO L226 Difference]: Without dead ends: 9848 [2021-11-25 18:11:21,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:11:21,021 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 311 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:21,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 1094 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:11:21,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-11-25 18:11:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9846. [2021-11-25 18:11:21,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9846 states, 9845 states have (on average 1.5973590655154901) internal successors, (15726), 9845 states have internal predecessors, (15726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:21,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9846 states to 9846 states and 15726 transitions. [2021-11-25 18:11:21,621 INFO L78 Accepts]: Start accepts. Automaton has 9846 states and 15726 transitions. Word has length 130 [2021-11-25 18:11:21,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:21,621 INFO L470 AbstractCegarLoop]: Abstraction has 9846 states and 15726 transitions. [2021-11-25 18:11:21,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 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) [2021-11-25 18:11:21,622 INFO L276 IsEmpty]: Start isEmpty. Operand 9846 states and 15726 transitions. [2021-11-25 18:11:21,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-25 18:11:21,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:21,623 INFO L514 BasicCegarLoop]: 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:11:21,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 18:11:21,624 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:21,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:21,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1149545587, now seen corresponding path program 1 times [2021-11-25 18:11:21,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:21,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790186516] [2021-11-25 18:11:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:21,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:11:21,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:21,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790186516] [2021-11-25 18:11:21,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790186516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:21,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:21,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:11:21,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034314649] [2021-11-25 18:11:21,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:21,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:11:21,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:21,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:11:21,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:11:21,718 INFO L87 Difference]: Start difference. First operand 9846 states and 15726 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:22,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:22,329 INFO L93 Difference]: Finished difference Result 19458 states and 31109 transitions. [2021-11-25 18:11:22,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:11:22,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-11-25 18:11:22,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:22,352 INFO L225 Difference]: With dead ends: 19458 [2021-11-25 18:11:22,352 INFO L226 Difference]: Without dead ends: 9848 [2021-11-25 18:11:22,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:11:22,365 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 319 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:22,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 1100 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:11:22,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-11-25 18:11:22,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9846. [2021-11-25 18:11:22,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9846 states, 9845 states have (on average 1.5939055358049772) internal successors, (15692), 9845 states have internal predecessors, (15692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:22,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9846 states to 9846 states and 15692 transitions. [2021-11-25 18:11:22,981 INFO L78 Accepts]: Start accepts. Automaton has 9846 states and 15692 transitions. Word has length 131 [2021-11-25 18:11:22,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:22,982 INFO L470 AbstractCegarLoop]: Abstraction has 9846 states and 15692 transitions. [2021-11-25 18:11:22,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:22,982 INFO L276 IsEmpty]: Start isEmpty. Operand 9846 states and 15692 transitions. [2021-11-25 18:11:22,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-25 18:11:22,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:22,984 INFO L514 BasicCegarLoop]: 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:11:22,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 18:11:22,985 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:22,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:22,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1334120795, now seen corresponding path program 1 times [2021-11-25 18:11:22,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:22,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740845419] [2021-11-25 18:11:22,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:22,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:11:23,064 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:23,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740845419] [2021-11-25 18:11:23,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740845419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:23,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:23,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:11:23,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475520557] [2021-11-25 18:11:23,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:23,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:11:23,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:23,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:11:23,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:11:23,067 INFO L87 Difference]: Start difference. First operand 9846 states and 15692 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:23,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:23,753 INFO L93 Difference]: Finished difference Result 19458 states and 31041 transitions. [2021-11-25 18:11:23,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:11:23,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-11-25 18:11:23,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:23,779 INFO L225 Difference]: With dead ends: 19458 [2021-11-25 18:11:23,779 INFO L226 Difference]: Without dead ends: 9848 [2021-11-25 18:11:23,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:11:23,794 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 317 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:23,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 1103 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:11:23,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-11-25 18:11:24,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9846. [2021-11-25 18:11:24,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9846 states, 9845 states have (on average 1.5904520060944642) internal successors, (15658), 9845 states have internal predecessors, (15658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:24,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9846 states to 9846 states and 15658 transitions. [2021-11-25 18:11:24,398 INFO L78 Accepts]: Start accepts. Automaton has 9846 states and 15658 transitions. Word has length 132 [2021-11-25 18:11:24,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:24,399 INFO L470 AbstractCegarLoop]: Abstraction has 9846 states and 15658 transitions. [2021-11-25 18:11:24,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:24,400 INFO L276 IsEmpty]: Start isEmpty. Operand 9846 states and 15658 transitions. [2021-11-25 18:11:24,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-25 18:11:24,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:24,402 INFO L514 BasicCegarLoop]: 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:11:24,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 18:11:24,402 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:24,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1538540372, now seen corresponding path program 1 times [2021-11-25 18:11:24,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:24,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576402598] [2021-11-25 18:11:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:24,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:24,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:11:24,490 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:24,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576402598] [2021-11-25 18:11:24,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576402598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:24,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:24,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:11:24,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685793213] [2021-11-25 18:11:24,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:24,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:11:24,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:24,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:11:24,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:11:24,493 INFO L87 Difference]: Start difference. First operand 9846 states and 15658 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:25,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:25,141 INFO L93 Difference]: Finished difference Result 19458 states and 30973 transitions. [2021-11-25 18:11:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:11:25,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-25 18:11:25,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:25,165 INFO L225 Difference]: With dead ends: 19458 [2021-11-25 18:11:25,165 INFO L226 Difference]: Without dead ends: 9848 [2021-11-25 18:11:25,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:11:25,181 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 315 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:25,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1106 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:11:25,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-11-25 18:11:25,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9846. [2021-11-25 18:11:25,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9846 states, 9845 states have (on average 1.5869984763839513) internal successors, (15624), 9845 states have internal predecessors, (15624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9846 states to 9846 states and 15624 transitions. [2021-11-25 18:11:25,713 INFO L78 Accepts]: Start accepts. Automaton has 9846 states and 15624 transitions. Word has length 133 [2021-11-25 18:11:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:25,714 INFO L470 AbstractCegarLoop]: Abstraction has 9846 states and 15624 transitions. [2021-11-25 18:11:25,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 9846 states and 15624 transitions. [2021-11-25 18:11:25,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-25 18:11:25,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:25,716 INFO L514 BasicCegarLoop]: 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:11:25,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 18:11:25,717 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:25,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:25,717 INFO L85 PathProgramCache]: Analyzing trace with hash -448757243, now seen corresponding path program 1 times [2021-11-25 18:11:25,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:25,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602669626] [2021-11-25 18:11:25,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:25,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:11:25,950 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:25,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602669626] [2021-11-25 18:11:25,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602669626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:25,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:25,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:11:25,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645148079] [2021-11-25 18:11:25,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:25,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:11:25,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:25,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:11:25,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:11:25,953 INFO L87 Difference]: Start difference. First operand 9846 states and 15624 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:26,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:26,799 INFO L93 Difference]: Finished difference Result 19458 states and 30905 transitions. [2021-11-25 18:11:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:11:26,799 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 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 135 [2021-11-25 18:11:26,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:26,823 INFO L225 Difference]: With dead ends: 19458 [2021-11-25 18:11:26,823 INFO L226 Difference]: Without dead ends: 9848 [2021-11-25 18:11:26,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:11:26,835 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 410 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:26,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 1433 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:11:26,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-11-25 18:11:27,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9846. [2021-11-25 18:11:27,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9846 states, 9845 states have (on average 1.5853732859319452) internal successors, (15608), 9845 states have internal predecessors, (15608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:27,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9846 states to 9846 states and 15608 transitions. [2021-11-25 18:11:27,331 INFO L78 Accepts]: Start accepts. Automaton has 9846 states and 15608 transitions. Word has length 135 [2021-11-25 18:11:27,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:27,332 INFO L470 AbstractCegarLoop]: Abstraction has 9846 states and 15608 transitions. [2021-11-25 18:11:27,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand 9846 states and 15608 transitions. [2021-11-25 18:11:27,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-25 18:11:27,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:27,334 INFO L514 BasicCegarLoop]: 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:11:27,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 18:11:27,335 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:27,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:27,335 INFO L85 PathProgramCache]: Analyzing trace with hash -742184393, now seen corresponding path program 1 times [2021-11-25 18:11:27,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:27,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870755147] [2021-11-25 18:11:27,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:27,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:11:27,496 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:27,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870755147] [2021-11-25 18:11:27,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870755147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:27,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:27,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:11:27,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92125521] [2021-11-25 18:11:27,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:27,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:11:27,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:27,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:11:27,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:11:27,498 INFO L87 Difference]: Start difference. First operand 9846 states and 15608 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:28,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:28,399 INFO L93 Difference]: Finished difference Result 24527 states and 38817 transitions. [2021-11-25 18:11:28,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:11:28,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 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 138 [2021-11-25 18:11:28,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:28,430 INFO L225 Difference]: With dead ends: 24527 [2021-11-25 18:11:28,431 INFO L226 Difference]: Without dead ends: 14917 [2021-11-25 18:11:28,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:11:28,441 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 405 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:28,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 1462 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:11:28,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14917 states. [2021-11-25 18:11:29,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14917 to 14915. [2021-11-25 18:11:29,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14915 states, 14914 states have (on average 1.5775781145232668) internal successors, (23528), 14914 states have internal predecessors, (23528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:29,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14915 states to 14915 states and 23528 transitions. [2021-11-25 18:11:29,073 INFO L78 Accepts]: Start accepts. Automaton has 14915 states and 23528 transitions. Word has length 138 [2021-11-25 18:11:29,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:29,073 INFO L470 AbstractCegarLoop]: Abstraction has 14915 states and 23528 transitions. [2021-11-25 18:11:29,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:29,074 INFO L276 IsEmpty]: Start isEmpty. Operand 14915 states and 23528 transitions. [2021-11-25 18:11:29,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-25 18:11:29,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:29,076 INFO L514 BasicCegarLoop]: 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:11:29,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 18:11:29,076 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:29,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1498741688, now seen corresponding path program 1 times [2021-11-25 18:11:29,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:29,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105691686] [2021-11-25 18:11:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:29,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:11:29,289 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:29,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105691686] [2021-11-25 18:11:29,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105691686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:29,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:29,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:11:29,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229284943] [2021-11-25 18:11:29,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:29,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:11:29,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:29,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:11:29,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:11:29,294 INFO L87 Difference]: Start difference. First operand 14915 states and 23528 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:30,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:30,464 INFO L93 Difference]: Finished difference Result 18223 states and 28636 transitions. [2021-11-25 18:11:30,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:11:30,465 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-25 18:11:30,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:30,515 INFO L225 Difference]: With dead ends: 18223 [2021-11-25 18:11:30,516 INFO L226 Difference]: Without dead ends: 18221 [2021-11-25 18:11:30,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:11:30,524 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 449 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 2097 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:30,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 2097 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:11:30,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18221 states. [2021-11-25 18:11:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18221 to 14929. [2021-11-25 18:11:31,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14929 states, 14928 states have (on average 1.5756966773847803) internal successors, (23522), 14928 states have internal predecessors, (23522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14929 states to 14929 states and 23522 transitions. [2021-11-25 18:11:31,440 INFO L78 Accepts]: Start accepts. Automaton has 14929 states and 23522 transitions. Word has length 139 [2021-11-25 18:11:31,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:31,440 INFO L470 AbstractCegarLoop]: Abstraction has 14929 states and 23522 transitions. [2021-11-25 18:11:31,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:31,441 INFO L276 IsEmpty]: Start isEmpty. Operand 14929 states and 23522 transitions. [2021-11-25 18:11:31,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-25 18:11:31,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:31,443 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:11:31,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 18:11:31,444 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:31,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:31,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1808932709, now seen corresponding path program 1 times [2021-11-25 18:11:31,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:31,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929418872] [2021-11-25 18:11:31,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:31,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:31,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:11:33,702 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:33,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929418872] [2021-11-25 18:11:33,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929418872] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:11:33,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829802158] [2021-11-25 18:11:33,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:33,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:11:33,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:11:33,706 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:11:33,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:11:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:33,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:11:33,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:11:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:11:34,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:11:34,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829802158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:34,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:11:34,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2021-11-25 18:11:34,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823953436] [2021-11-25 18:11:34,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:34,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:11:34,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:34,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:11:34,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:11:34,459 INFO L87 Difference]: Start difference. First operand 14929 states and 23522 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:36,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:36,160 INFO L93 Difference]: Finished difference Result 43944 states and 69249 transitions. [2021-11-25 18:11:36,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:11:36,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 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 151 [2021-11-25 18:11:36,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:36,209 INFO L225 Difference]: With dead ends: 43944 [2021-11-25 18:11:36,210 INFO L226 Difference]: Without dead ends: 29248 [2021-11-25 18:11:36,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:11:36,235 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 968 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:36,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [968 Valid, 748 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:11:36,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29248 states. [2021-11-25 18:11:37,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29248 to 29246. [2021-11-25 18:11:37,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29246 states, 29245 states have (on average 1.571345529150282) internal successors, (45954), 29245 states have internal predecessors, (45954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:37,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29246 states to 29246 states and 45954 transitions. [2021-11-25 18:11:37,713 INFO L78 Accepts]: Start accepts. Automaton has 29246 states and 45954 transitions. Word has length 151 [2021-11-25 18:11:37,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:37,714 INFO L470 AbstractCegarLoop]: Abstraction has 29246 states and 45954 transitions. [2021-11-25 18:11:37,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:37,714 INFO L276 IsEmpty]: Start isEmpty. Operand 29246 states and 45954 transitions. [2021-11-25 18:11:37,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-25 18:11:37,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:37,717 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:11:37,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:11:37,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2046a0c7-a983-49ac-aab7-c81e38a12e61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 18:11:37,946 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:37,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:37,946 INFO L85 PathProgramCache]: Analyzing trace with hash -166453548, now seen corresponding path program 1 times [2021-11-25 18:11:37,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:37,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661376622] [2021-11-25 18:11:37,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:37,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:11:38,036 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:38,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661376622] [2021-11-25 18:11:38,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661376622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:38,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:38,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:11:38,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044452555] [2021-11-25 18:11:38,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:38,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:11:38,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:38,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:11:38,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:11:38,039 INFO L87 Difference]: Start difference. First operand 29246 states and 45954 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:39,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:39,979 INFO L93 Difference]: Finished difference Result 67808 states and 106828 transitions. [2021-11-25 18:11:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:11:39,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 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 152 [2021-11-25 18:11:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:40,032 INFO L225 Difference]: With dead ends: 67808 [2021-11-25 18:11:40,032 INFO L226 Difference]: Without dead ends: 38959 [2021-11-25 18:11:40,059 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:11:40,060 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 148 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:40,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 752 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:11:40,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38959 states. [2021-11-25 18:11:42,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38959 to 38957. [2021-11-25 18:11:42,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38957 states, 38956 states have (on average 1.5627374473765274) internal successors, (60878), 38956 states have internal predecessors, (60878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:42,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38957 states to 38957 states and 60878 transitions. [2021-11-25 18:11:42,458 INFO L78 Accepts]: Start accepts. Automaton has 38957 states and 60878 transitions. Word has length 152 [2021-11-25 18:11:42,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:42,459 INFO L470 AbstractCegarLoop]: Abstraction has 38957 states and 60878 transitions. [2021-11-25 18:11:42,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:42,459 INFO L276 IsEmpty]: Start isEmpty. Operand 38957 states and 60878 transitions. [2021-11-25 18:11:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-25 18:11:42,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:42,462 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:11:42,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 18:11:42,463 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:42,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:42,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1163140395, now seen corresponding path program 1 times [2021-11-25 18:11:42,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:42,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619935273] [2021-11-25 18:11:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:42,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:11:42,513 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:42,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619935273] [2021-11-25 18:11:42,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619935273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:42,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:42,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:11:42,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543289662] [2021-11-25 18:11:42,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:42,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:11:42,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:42,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:11:42,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:11:42,515 INFO L87 Difference]: Start difference. First operand 38957 states and 60878 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:46,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:46,705 INFO L93 Difference]: Finished difference Result 116795 states and 182511 transitions. [2021-11-25 18:11:46,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:11:46,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 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 153 [2021-11-25 18:11:46,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:46,826 INFO L225 Difference]: With dead ends: 116795 [2021-11-25 18:11:46,827 INFO L226 Difference]: Without dead ends: 77877 [2021-11-25 18:11:46,868 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:11:46,868 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 350 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:46,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 752 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:11:46,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77877 states. [2021-11-25 18:11:49,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77877 to 38964. [2021-11-25 18:11:49,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38964 states, 38963 states have (on average 1.562687678053538) internal successors, (60887), 38963 states have internal predecessors, (60887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:49,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38964 states to 38964 states and 60887 transitions. [2021-11-25 18:11:49,638 INFO L78 Accepts]: Start accepts. Automaton has 38964 states and 60887 transitions. Word has length 153 [2021-11-25 18:11:49,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:49,638 INFO L470 AbstractCegarLoop]: Abstraction has 38964 states and 60887 transitions. [2021-11-25 18:11:49,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:49,638 INFO L276 IsEmpty]: Start isEmpty. Operand 38964 states and 60887 transitions. [2021-11-25 18:11:49,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-25 18:11:49,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:49,640 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:11:49,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 18:11:49,641 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:49,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:49,641 INFO L85 PathProgramCache]: Analyzing trace with hash 2004918901, now seen corresponding path program 1 times [2021-11-25 18:11:49,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:49,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599470673] [2021-11-25 18:11:49,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:49,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:11:49,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:49,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599470673] [2021-11-25 18:11:49,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599470673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:49,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:49,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:11:49,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825146064] [2021-11-25 18:11:49,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:49,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:11:49,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:49,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:11:49,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:11:49,724 INFO L87 Difference]: Start difference. First operand 38964 states and 60887 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:54,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:54,625 INFO L93 Difference]: Finished difference Result 114257 states and 178446 transitions. [2021-11-25 18:11:54,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:11:54,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 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 153 [2021-11-25 18:11:54,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:54,749 INFO L225 Difference]: With dead ends: 114257 [2021-11-25 18:11:54,749 INFO L226 Difference]: Without dead ends: 75388 [2021-11-25 18:11:54,782 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:11:54,783 INFO L933 BasicCegarLoop]: 637 mSDtfsCounter, 273 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:54,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 1001 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:11:54,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75388 states. [2021-11-25 18:11:59,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75388 to 75386. [2021-11-25 18:11:59,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75386 states, 75385 states have (on average 1.5547124759567552) internal successors, (117202), 75385 states have internal predecessors, (117202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:59,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75386 states to 75386 states and 117202 transitions. [2021-11-25 18:11:59,827 INFO L78 Accepts]: Start accepts. Automaton has 75386 states and 117202 transitions. Word has length 153 [2021-11-25 18:11:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:59,827 INFO L470 AbstractCegarLoop]: Abstraction has 75386 states and 117202 transitions. [2021-11-25 18:11:59,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:59,828 INFO L276 IsEmpty]: Start isEmpty. Operand 75386 states and 117202 transitions. [2021-11-25 18:11:59,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-25 18:11:59,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:59,830 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:11:59,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 18:11:59,831 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:59,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:59,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1593271888, now seen corresponding path program 1 times [2021-11-25 18:11:59,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:59,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384984732] [2021-11-25 18:11:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:59,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:11:59,898 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:59,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384984732] [2021-11-25 18:11:59,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384984732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:59,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:59,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:11:59,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409465617] [2021-11-25 18:11:59,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:59,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:11:59,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:59,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:11:59,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:11:59,902 INFO L87 Difference]: Start difference. First operand 75386 states and 117202 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)