./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/bin/utaipan-I9t0OCRTmS --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 8e8985b7b99a6dec53be0ba16cc0e7b241934830d919fef1f601cc1b51084525 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 06:53:35,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:53:35,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:53:35,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:53:35,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:53:35,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:53:35,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:53:35,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:53:35,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:53:35,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:53:35,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:53:35,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:53:35,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:53:35,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:53:35,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:53:35,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:53:35,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:53:35,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:53:35,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:53:35,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:53:35,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:53:35,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:53:35,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:53:35,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:53:35,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:53:35,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:53:35,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:53:35,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:53:35,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:53:35,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:53:35,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:53:35,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:53:35,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:53:35,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:53:35,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:53:35,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:53:35,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:53:35,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:53:35,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:53:35,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:53:35,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:53:35,816 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:53:35,861 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:53:35,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:53:35,871 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:53:35,872 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:53:35,873 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:53:35,873 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:53:35,873 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:53:35,874 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:53:35,874 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:53:35,874 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:53:35,876 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:53:35,876 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:53:35,876 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:53:35,877 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:53:35,877 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:53:35,877 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:53:35,877 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:53:35,878 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:53:35,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:53:35,879 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:53:35,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:53:35,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:53:35,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:53:35,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:53:35,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:53:35,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:53:35,881 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:53:35,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:53:35,882 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:53:35,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:53:35,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:53:35,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:53:35,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:53:35,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:53:35,884 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:53:35,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:53:35,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:53:35,885 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:53:35,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:53:35,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:53:35,885 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:53:35,886 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e8985b7b99a6dec53be0ba16cc0e7b241934830d919fef1f601cc1b51084525 [2022-11-19 06:53:36,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:53:36,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:53:36,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:53:36,239 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:53:36,240 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:53:36,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-11-19 06:53:36,311 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/bin/utaipan-I9t0OCRTmS/data/679e3783a/3d301e8252a949eebc725cfc0a70a815/FLAG9db2eedc2 [2022-11-19 06:53:36,889 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:53:36,890 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-11-19 06:53:36,915 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/bin/utaipan-I9t0OCRTmS/data/679e3783a/3d301e8252a949eebc725cfc0a70a815/FLAG9db2eedc2 [2022-11-19 06:53:37,193 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/bin/utaipan-I9t0OCRTmS/data/679e3783a/3d301e8252a949eebc725cfc0a70a815 [2022-11-19 06:53:37,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:53:37,201 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:53:37,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:53:37,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:53:37,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:53:37,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:53:37" (1/1) ... [2022-11-19 06:53:37,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@216b7514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:37, skipping insertion in model container [2022-11-19 06:53:37,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:53:37" (1/1) ... [2022-11-19 06:53:37,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:53:37,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:53:37,567 WARN L234 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_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4900,4913] [2022-11-19 06:53:37,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:53:37,610 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:53:37,651 WARN L234 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_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4900,4913] [2022-11-19 06:53:37,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:53:37,687 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:53:37,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:37 WrapperNode [2022-11-19 06:53:37,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:53:37,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:53:37,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:53:37,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:53:37,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:37" (1/1) ... [2022-11-19 06:53:37,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:37" (1/1) ... [2022-11-19 06:53:37,739 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 342 [2022-11-19 06:53:37,739 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:53:37,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:53:37,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:53:37,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:53:37,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:37" (1/1) ... [2022-11-19 06:53:37,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:37" (1/1) ... [2022-11-19 06:53:37,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:37" (1/1) ... [2022-11-19 06:53:37,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:37" (1/1) ... [2022-11-19 06:53:37,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:37" (1/1) ... [2022-11-19 06:53:37,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:37" (1/1) ... [2022-11-19 06:53:37,785 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:37" (1/1) ... [2022-11-19 06:53:37,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:37" (1/1) ... [2022-11-19 06:53:37,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:53:37,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:53:37,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:53:37,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:53:37,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:37" (1/1) ... [2022-11-19 06:53:37,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:53:37,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:37,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:53:37,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:53:37,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:53:37,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:53:37,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:53:37,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:53:38,124 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:53:38,127 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:53:38,623 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:53:38,867 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:53:38,867 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 06:53:38,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:53:38 BoogieIcfgContainer [2022-11-19 06:53:38,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:53:38,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:53:38,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:53:38,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:53:38,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:53:37" (1/3) ... [2022-11-19 06:53:38,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7593c234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:53:38, skipping insertion in model container [2022-11-19 06:53:38,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:37" (2/3) ... [2022-11-19 06:53:38,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7593c234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:53:38, skipping insertion in model container [2022-11-19 06:53:38,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:53:38" (3/3) ... [2022-11-19 06:53:38,887 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-11-19 06:53:38,908 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:53:38,908 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:53:38,976 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:53:38,984 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@19527623, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:53:38,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:53:38,990 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 58 states have (on average 1.7241379310344827) internal successors, (100), 59 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:38,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 06:53:38,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:39,000 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:39,000 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:39,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:39,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1366550172, now seen corresponding path program 1 times [2022-11-19 06:53:39,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:39,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919124520] [2022-11-19 06:53:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:39,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:39,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:39,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919124520] [2022-11-19 06:53:39,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919124520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:39,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:39,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:53:39,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439629405] [2022-11-19 06:53:39,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:39,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:53:39,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:39,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:53:39,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:39,651 INFO L87 Difference]: Start difference. First operand has 60 states, 58 states have (on average 1.7241379310344827) internal successors, (100), 59 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:39,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:39,874 INFO L93 Difference]: Finished difference Result 126 states and 196 transitions. [2022-11-19 06:53:39,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:39,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-19 06:53:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:39,888 INFO L225 Difference]: With dead ends: 126 [2022-11-19 06:53:39,894 INFO L226 Difference]: Without dead ends: 87 [2022-11-19 06:53:39,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:39,905 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 66 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:39,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 171 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:53:39,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-19 06:53:39,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2022-11-19 06:53:39,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.3452380952380953) internal successors, (113), 84 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:39,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 113 transitions. [2022-11-19 06:53:39,996 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 113 transitions. Word has length 38 [2022-11-19 06:53:39,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:39,997 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 113 transitions. [2022-11-19 06:53:39,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:39,998 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 113 transitions. [2022-11-19 06:53:40,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 06:53:40,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:40,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:40,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:53:40,002 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:40,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:40,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1345882917, now seen corresponding path program 1 times [2022-11-19 06:53:40,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:40,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616901063] [2022-11-19 06:53:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:40,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:40,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:40,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:40,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616901063] [2022-11-19 06:53:40,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616901063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:40,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:40,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:53:40,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503458821] [2022-11-19 06:53:40,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:40,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:53:40,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:40,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:53:40,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:40,154 INFO L87 Difference]: Start difference. First operand 85 states and 113 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:40,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:40,288 INFO L93 Difference]: Finished difference Result 197 states and 277 transitions. [2022-11-19 06:53:40,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:40,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-19 06:53:40,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:40,290 INFO L225 Difference]: With dead ends: 197 [2022-11-19 06:53:40,291 INFO L226 Difference]: Without dead ends: 137 [2022-11-19 06:53:40,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:40,293 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 40 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:40,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 137 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:53:40,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-19 06:53:40,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-11-19 06:53:40,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.3880597014925373) internal successors, (186), 134 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 186 transitions. [2022-11-19 06:53:40,347 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 186 transitions. Word has length 41 [2022-11-19 06:53:40,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:40,348 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 186 transitions. [2022-11-19 06:53:40,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:40,348 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 186 transitions. [2022-11-19 06:53:40,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 06:53:40,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:40,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:40,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:53:40,354 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:40,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1412731696, now seen corresponding path program 1 times [2022-11-19 06:53:40,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:40,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111260756] [2022-11-19 06:53:40,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:40,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:40,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:40,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111260756] [2022-11-19 06:53:40,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111260756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:40,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:40,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:53:40,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948947001] [2022-11-19 06:53:40,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:40,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:53:40,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:40,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:53:40,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:40,579 INFO L87 Difference]: Start difference. First operand 135 states and 186 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:40,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:40,695 INFO L93 Difference]: Finished difference Result 339 states and 484 transitions. [2022-11-19 06:53:40,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:40,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2022-11-19 06:53:40,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:40,707 INFO L225 Difference]: With dead ends: 339 [2022-11-19 06:53:40,707 INFO L226 Difference]: Without dead ends: 229 [2022-11-19 06:53:40,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:40,716 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 35 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:40,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 133 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:53:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-19 06:53:40,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2022-11-19 06:53:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.407079646017699) internal successors, (318), 226 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 318 transitions. [2022-11-19 06:53:40,819 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 318 transitions. Word has length 44 [2022-11-19 06:53:40,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:40,820 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 318 transitions. [2022-11-19 06:53:40,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 318 transitions. [2022-11-19 06:53:40,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 06:53:40,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:40,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:40,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:53:40,826 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:40,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:40,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2077931098, now seen corresponding path program 1 times [2022-11-19 06:53:40,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:40,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572366136] [2022-11-19 06:53:40,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:40,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:40,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:40,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572366136] [2022-11-19 06:53:40,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572366136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:40,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:40,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:53:40,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171661467] [2022-11-19 06:53:40,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:40,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:53:40,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:40,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:53:40,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:40,992 INFO L87 Difference]: Start difference. First operand 227 states and 318 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:41,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:41,128 INFO L93 Difference]: Finished difference Result 599 states and 856 transitions. [2022-11-19 06:53:41,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:41,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-19 06:53:41,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:41,134 INFO L225 Difference]: With dead ends: 599 [2022-11-19 06:53:41,134 INFO L226 Difference]: Without dead ends: 397 [2022-11-19 06:53:41,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:41,148 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 30 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:41,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 129 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:53:41,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-11-19 06:53:41,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 395. [2022-11-19 06:53:41,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.4060913705583757) internal successors, (554), 394 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:41,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 554 transitions. [2022-11-19 06:53:41,257 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 554 transitions. Word has length 47 [2022-11-19 06:53:41,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:41,258 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 554 transitions. [2022-11-19 06:53:41,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:41,259 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 554 transitions. [2022-11-19 06:53:41,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-19 06:53:41,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:41,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:41,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:53:41,268 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:41,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:41,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1318268341, now seen corresponding path program 1 times [2022-11-19 06:53:41,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:41,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359859150] [2022-11-19 06:53:41,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:41,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:41,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:41,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359859150] [2022-11-19 06:53:41,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359859150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:41,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:41,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:53:41,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750812822] [2022-11-19 06:53:41,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:41,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:53:41,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:41,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:53:41,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:53:41,529 INFO L87 Difference]: Start difference. First operand 395 states and 554 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:42,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:42,115 INFO L93 Difference]: Finished difference Result 1605 states and 2279 transitions. [2022-11-19 06:53:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 06:53:42,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2022-11-19 06:53:42,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:42,122 INFO L225 Difference]: With dead ends: 1605 [2022-11-19 06:53:42,122 INFO L226 Difference]: Without dead ends: 1235 [2022-11-19 06:53:42,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-19 06:53:42,129 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 357 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:42,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 714 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:53:42,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2022-11-19 06:53:42,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 567. [2022-11-19 06:53:42,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 1.3939929328621907) internal successors, (789), 566 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 789 transitions. [2022-11-19 06:53:42,323 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 789 transitions. Word has length 50 [2022-11-19 06:53:42,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:42,328 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 789 transitions. [2022-11-19 06:53:42,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:42,328 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 789 transitions. [2022-11-19 06:53:42,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-19 06:53:42,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:42,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:42,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:53:42,338 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:42,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:42,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1075310744, now seen corresponding path program 1 times [2022-11-19 06:53:42,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:42,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936070309] [2022-11-19 06:53:42,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:42,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:42,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:42,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936070309] [2022-11-19 06:53:42,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936070309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:42,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:42,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:53:42,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360306896] [2022-11-19 06:53:42,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:42,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:53:42,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:42,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:53:42,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:42,498 INFO L87 Difference]: Start difference. First operand 567 states and 789 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:42,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:42,743 INFO L93 Difference]: Finished difference Result 1437 states and 2027 transitions. [2022-11-19 06:53:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:42,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-11-19 06:53:42,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:42,749 INFO L225 Difference]: With dead ends: 1437 [2022-11-19 06:53:42,749 INFO L226 Difference]: Without dead ends: 895 [2022-11-19 06:53:42,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:42,752 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 24 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:42,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 108 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:53:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-11-19 06:53:42,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 893. [2022-11-19 06:53:42,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.404708520179372) internal successors, (1253), 892 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1253 transitions. [2022-11-19 06:53:42,969 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1253 transitions. Word has length 52 [2022-11-19 06:53:42,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:42,970 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1253 transitions. [2022-11-19 06:53:42,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:42,970 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1253 transitions. [2022-11-19 06:53:42,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-19 06:53:42,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:42,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:42,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 06:53:42,974 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:42,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:42,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1060296080, now seen corresponding path program 1 times [2022-11-19 06:53:42,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:42,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498675834] [2022-11-19 06:53:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:42,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:43,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:43,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498675834] [2022-11-19 06:53:43,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498675834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:43,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:43,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:53:43,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172901808] [2022-11-19 06:53:43,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:43,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:53:43,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:43,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:53:43,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:53:43,363 INFO L87 Difference]: Start difference. First operand 893 states and 1253 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:43,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:43,756 INFO L93 Difference]: Finished difference Result 1761 states and 2480 transitions. [2022-11-19 06:53:43,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:53:43,757 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-11-19 06:53:43,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:43,762 INFO L225 Difference]: With dead ends: 1761 [2022-11-19 06:53:43,762 INFO L226 Difference]: Without dead ends: 895 [2022-11-19 06:53:43,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:53:43,765 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 168 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:43,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 198 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:53:43,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-11-19 06:53:43,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 893. [2022-11-19 06:53:43,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.4024663677130045) internal successors, (1251), 892 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:43,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1251 transitions. [2022-11-19 06:53:43,995 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1251 transitions. Word has length 52 [2022-11-19 06:53:43,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:43,995 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1251 transitions. [2022-11-19 06:53:43,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:43,996 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1251 transitions. [2022-11-19 06:53:43,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 06:53:43,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:43,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:43,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 06:53:43,997 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:43,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:43,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1494638487, now seen corresponding path program 1 times [2022-11-19 06:53:43,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:43,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098064308] [2022-11-19 06:53:43,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:43,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:44,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:44,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098064308] [2022-11-19 06:53:44,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098064308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:44,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:44,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:53:44,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268016451] [2022-11-19 06:53:44,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:44,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:53:44,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:44,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:53:44,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:53:44,129 INFO L87 Difference]: Start difference. First operand 893 states and 1251 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:44,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:44,461 INFO L93 Difference]: Finished difference Result 1759 states and 2475 transitions. [2022-11-19 06:53:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:53:44,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2022-11-19 06:53:44,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:44,470 INFO L225 Difference]: With dead ends: 1759 [2022-11-19 06:53:44,470 INFO L226 Difference]: Without dead ends: 893 [2022-11-19 06:53:44,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:53:44,473 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 156 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:44,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 61 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:53:44,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-11-19 06:53:44,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2022-11-19 06:53:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.3845291479820627) internal successors, (1235), 892 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1235 transitions. [2022-11-19 06:53:44,728 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1235 transitions. Word has length 53 [2022-11-19 06:53:44,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:44,729 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1235 transitions. [2022-11-19 06:53:44,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:44,729 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1235 transitions. [2022-11-19 06:53:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 06:53:44,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:44,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:44,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 06:53:44,731 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:44,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:44,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1934796420, now seen corresponding path program 1 times [2022-11-19 06:53:44,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:44,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011198974] [2022-11-19 06:53:44,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:44,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:44,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:44,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011198974] [2022-11-19 06:53:44,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011198974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:44,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:44,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:53:44,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981285756] [2022-11-19 06:53:44,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:44,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:53:44,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:44,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:53:44,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:53:44,883 INFO L87 Difference]: Start difference. First operand 893 states and 1235 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:45,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:45,276 INFO L93 Difference]: Finished difference Result 1759 states and 2443 transitions. [2022-11-19 06:53:45,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:53:45,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2022-11-19 06:53:45,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:45,281 INFO L225 Difference]: With dead ends: 1759 [2022-11-19 06:53:45,282 INFO L226 Difference]: Without dead ends: 893 [2022-11-19 06:53:45,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:53:45,287 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 179 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:45,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 45 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:53:45,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-11-19 06:53:45,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2022-11-19 06:53:45,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.3486547085201794) internal successors, (1203), 892 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1203 transitions. [2022-11-19 06:53:45,546 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1203 transitions. Word has length 53 [2022-11-19 06:53:45,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:45,547 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1203 transitions. [2022-11-19 06:53:45,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:45,547 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1203 transitions. [2022-11-19 06:53:45,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 06:53:45,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:45,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:45,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 06:53:45,549 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:45,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:45,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1597307169, now seen corresponding path program 1 times [2022-11-19 06:53:45,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:45,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827549385] [2022-11-19 06:53:45,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:45,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:45,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:45,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827549385] [2022-11-19 06:53:45,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827549385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:45,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:45,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:53:45,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192733973] [2022-11-19 06:53:45,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:45,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:53:45,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:45,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:53:45,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:53:45,684 INFO L87 Difference]: Start difference. First operand 893 states and 1203 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:46,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:46,011 INFO L93 Difference]: Finished difference Result 1759 states and 2379 transitions. [2022-11-19 06:53:46,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:53:46,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2022-11-19 06:53:46,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:46,016 INFO L225 Difference]: With dead ends: 1759 [2022-11-19 06:53:46,016 INFO L226 Difference]: Without dead ends: 893 [2022-11-19 06:53:46,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:53:46,019 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 163 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:46,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 53 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:53:46,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-11-19 06:53:46,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2022-11-19 06:53:46,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.3262331838565022) internal successors, (1183), 892 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:46,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1183 transitions. [2022-11-19 06:53:46,269 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1183 transitions. Word has length 53 [2022-11-19 06:53:46,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:46,270 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1183 transitions. [2022-11-19 06:53:46,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:46,270 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1183 transitions. [2022-11-19 06:53:46,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 06:53:46,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:46,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:46,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 06:53:46,271 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:46,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:46,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1725392476, now seen corresponding path program 1 times [2022-11-19 06:53:46,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:46,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97302183] [2022-11-19 06:53:46,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:46,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:46,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:46,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97302183] [2022-11-19 06:53:46,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97302183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:46,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:46,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:53:46,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228267733] [2022-11-19 06:53:46,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:46,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:53:46,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:46,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:53:46,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:53:46,665 INFO L87 Difference]: Start difference. First operand 893 states and 1183 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:47,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:47,287 INFO L93 Difference]: Finished difference Result 1174 states and 1546 transitions. [2022-11-19 06:53:47,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 06:53:47,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2022-11-19 06:53:47,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:47,294 INFO L225 Difference]: With dead ends: 1174 [2022-11-19 06:53:47,295 INFO L226 Difference]: Without dead ends: 1172 [2022-11-19 06:53:47,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-19 06:53:47,299 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 105 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:47,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 378 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:53:47,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-11-19 06:53:47,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 893. [2022-11-19 06:53:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.3172645739910314) internal successors, (1175), 892 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1175 transitions. [2022-11-19 06:53:47,624 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1175 transitions. Word has length 53 [2022-11-19 06:53:47,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:47,625 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1175 transitions. [2022-11-19 06:53:47,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:47,626 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1175 transitions. [2022-11-19 06:53:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-19 06:53:47,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:47,627 INFO L195 NwaCegarLoop]: 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] [2022-11-19 06:53:47,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 06:53:47,627 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:47,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:47,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1473759324, now seen corresponding path program 1 times [2022-11-19 06:53:47,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:47,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022795727] [2022-11-19 06:53:47,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:47,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:53,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:53,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022795727] [2022-11-19 06:53:53,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022795727] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:53,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151279674] [2022-11-19 06:53:53,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:53,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:53,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:53,788 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:53,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f28b7f3-b8ce-4c91-9043-3100c8286b8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:53:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:53,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-19 06:53:53,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:04,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:40,319 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 370 DAG size of output: 343 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:02:12,631 WARN L233 SmtUtils]: Spent 8.66s on a formula simplification. DAG size of input: 372 DAG size of output: 318 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:03:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:12,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151279674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:12,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [425456813] [2022-11-19 07:03:12,668 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 07:03:12,668 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:03:12,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:03:12,680 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:03:12,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:03:12,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:12,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:12,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:12,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:12,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:12,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:03:12,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-11-19 07:03:12,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:12,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:12,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:03:12,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-11-19 07:03:24,367 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:04:09,210 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32240#(and (<= ~__return_2928~0 1) (<= 0 ~id3~0) (= ~p4~0 0) (<= 0 ~mode1~0) (<= 0 ~mode4~0) (<= 0 ~send4~0) (<= ~id4~0 127) (<= 0 ~id1~0) (<= 0 ~st4~0) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= 0 ~mode3~0) (= |ULTIMATE.start_main_~check__tmp~0#1| ~__return_3023~0) (= ~p3_new~0 ~nomsg~0) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= 0 |ULTIMATE.start_main_~node3____CPAchecker_TMP_0~0#1|) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= 0 ~st2~0) (= |ULTIMATE.start_main_~main__c1~0#1| ~__return_3023~0) (<= ~mode3~0 1) (<= 0 ~send2~0) (<= ~mode4~0 1) (<= ~id1~0 127) (not (<= (+ ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1)) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 (+ ~p2_new~0 1)) (<= ~mode1~0 1) (= |ULTIMATE.start_main_~assert__arg~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= (+ ~p2_new~0 1) 0) (<= 0 |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1|) (<= 0 ~id4~0) (<= 0 (+ ~p4_new~0 1)) (= ~__return_3091~0 0) (<= (+ ~p4_new~0 1) 0) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 ~mode2~0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= (+ ~p3_new~0 1) 0) (<= 1 ~__return_2928~0) (= ~p3~0 0) (<= 0 (+ ~p1_new~0 1)) (= (ite (= |ULTIMATE.start_main_~main__c1~0#1| 0) 0 1) |ULTIMATE.start_main_~__tmp_1~0#1|) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= 0 ~send3~0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1|) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:04:09,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:04:09,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:04:09,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 28] total 79 [2022-11-19 07:04:09,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48990019] [2022-11-19 07:04:09,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:04:09,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-19 07:04:09,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:09,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-19 07:04:09,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=14139, Unknown=0, NotChecked=0, Total=16256 [2022-11-19 07:04:09,221 INFO L87 Difference]: Start difference. First operand 893 states and 1175 transitions. Second operand has 80 states, 80 states have (on average 2.3375) internal successors, (187), 79 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:04:43,573 WARN L233 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 991 DAG size of output: 124 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:04:55,218 WARN L233 SmtUtils]: Spent 8.81s on a formula simplification. DAG size of input: 797 DAG size of output: 202 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:05:03,389 WARN L233 SmtUtils]: Spent 7.14s on a formula simplification. DAG size of input: 661 DAG size of output: 181 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:05:52,739 WARN L233 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 660 DAG size of output: 165 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:06:02,696 WARN L233 SmtUtils]: Spent 6.34s on a formula simplification. DAG size of input: 712 DAG size of output: 182 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:06:42,910 WARN L233 SmtUtils]: Spent 5.91s on a formula simplification. DAG size of input: 636 DAG size of output: 145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:07:03,199 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 798 DAG size of output: 182 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:07:19,276 WARN L233 SmtUtils]: Spent 10.49s on a formula simplification. DAG size of input: 962 DAG size of output: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:07:40,453 WARN L233 SmtUtils]: Spent 6.23s on a formula simplification. DAG size of input: 784 DAG size of output: 194 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:07:50,384 WARN L233 SmtUtils]: Spent 7.57s on a formula simplification. DAG size of input: 825 DAG size of output: 195 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)