./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_3f522a34-3273-47a2-a29c-d61938f4a293/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f522a34-3273-47a2-a29c-d61938f4a293/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f522a34-3273-47a2-a29c-d61938f4a293/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f522a34-3273-47a2-a29c-d61938f4a293/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f522a34-3273-47a2-a29c-d61938f4a293/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f522a34-3273-47a2-a29c-d61938f4a293/bin/utaipan-g80aRyZoba --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 c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d --- 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-b5237d8 [2022-11-22 01:49:01,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:49:01,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:49:01,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:49:01,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:49:01,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:49:01,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:49:01,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:49:01,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:49:01,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:49:01,703 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:49:01,704 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:49:01,705 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:49:01,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:49:01,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:49:01,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:49:01,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:49:01,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:49:01,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:49:01,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:49:01,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:49:01,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:49:01,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:49:01,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:49:01,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:49:01,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:49:01,729 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:49:01,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:49:01,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:49:01,732 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:49:01,732 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:49:01,733 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:49:01,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:49:01,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:49:01,737 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:49:01,737 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:49:01,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:49:01,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:49:01,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:49:01,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:49:01,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:49:01,747 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f522a34-3273-47a2-a29c-d61938f4a293/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:49:01,791 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:49:01,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:49:01,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:49:01,793 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:49:01,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:49:01,795 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:49:01,795 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:49:01,795 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:49:01,795 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:49:01,796 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:49:01,797 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:49:01,797 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:49:01,797 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:49:01,798 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:49:01,798 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:49:01,798 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:49:01,798 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:49:01,799 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:49:01,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:49:01,800 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:49:01,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:49:01,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:49:01,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:49:01,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:49:01,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:49:01,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:49:01,801 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:49:01,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:49:01,802 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:49:01,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:49:01,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:49:01,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:49:01,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:49:01,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:49:01,804 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:49:01,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:49:01,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:49:01,805 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:49:01,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:49:01,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:49:01,806 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:49:01,806 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_3f522a34-3273-47a2-a29c-d61938f4a293/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f522a34-3273-47a2-a29c-d61938f4a293/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d [2022-11-22 01:49:02,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:49:02,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:49:02,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:49:02,199 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:49:02,200 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:49:02,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f522a34-3273-47a2-a29c-d61938f4a293/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2022-11-22 01:49:05,273 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:49:05,760 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:49:05,761 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f522a34-3273-47a2-a29c-d61938f4a293/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2022-11-22 01:49:05,789 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f522a34-3273-47a2-a29c-d61938f4a293/bin/utaipan-g80aRyZoba/data/3dde309c2/091cb063bc874d72a9548f9e1a4e66d4/FLAG45dcffcfe [2022-11-22 01:49:05,811 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f522a34-3273-47a2-a29c-d61938f4a293/bin/utaipan-g80aRyZoba/data/3dde309c2/091cb063bc874d72a9548f9e1a4e66d4 [2022-11-22 01:49:05,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:49:05,817 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:49:05,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:49:05,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:49:05,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:49:05,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:49:05" (1/1) ... [2022-11-22 01:49:05,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@624d3518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:49:05, skipping insertion in model container [2022-11-22 01:49:05,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:49:05" (1/1) ... [2022-11-22 01:49:05,839 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:49:05,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:49:06,530 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f522a34-3273-47a2-a29c-d61938f4a293/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2022-11-22 01:49:06,542 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:49:06,560 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:49:06,676 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f522a34-3273-47a2-a29c-d61938f4a293/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2022-11-22 01:49:06,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:49:06,708 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:49:06,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:49:06 WrapperNode [2022-11-22 01:49:06,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:49:06,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:49:06,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:49:06,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:49:06,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:49:06" (1/1) ... [2022-11-22 01:49:06,774 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:49:06" (1/1) ... [2022-11-22 01:49:06,882 INFO L138 Inliner]: procedures = 93, calls = 340, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 861 [2022-11-22 01:49:06,882 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:49:06,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:49:06,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:49:06,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:49:06,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:49:06" (1/1) ... [2022-11-22 01:49:06,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:49:06" (1/1) ... [2022-11-22 01:49:06,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:49:06" (1/1) ... [2022-11-22 01:49:06,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:49:06" (1/1) ... [2022-11-22 01:49:06,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:49:06" (1/1) ... [2022-11-22 01:49:06,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:49:06" (1/1) ... [2022-11-22 01:49:06,974 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:49:06" (1/1) ... [2022-11-22 01:49:06,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:49:06" (1/1) ... [2022-11-22 01:49:07,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:49:07,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:49:07,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:49:07,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:49:07,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:49:06" (1/1) ... [2022-11-22 01:49:07,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:49:07,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f522a34-3273-47a2-a29c-d61938f4a293/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:49:07,040 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f522a34-3273-47a2-a29c-d61938f4a293/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:49:07,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f522a34-3273-47a2-a29c-d61938f4a293/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:49:07,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:49:07,096 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-22 01:49:07,096 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-22 01:49:07,096 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-22 01:49:07,097 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-22 01:49:07,097 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 01:49:07,097 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 01:49:07,097 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 01:49:07,097 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 01:49:07,098 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 01:49:07,098 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 01:49:07,098 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 01:49:07,098 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 01:49:07,098 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 01:49:07,099 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 01:49:07,099 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-22 01:49:07,099 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-22 01:49:07,099 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 01:49:07,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 01:49:07,099 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 01:49:07,100 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 01:49:07,100 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 01:49:07,101 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 01:49:07,101 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 01:49:07,101 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 01:49:07,102 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 01:49:07,103 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 01:49:07,103 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 01:49:07,103 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 01:49:07,103 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2022-11-22 01:49:07,105 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2022-11-22 01:49:07,105 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 01:49:07,106 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 01:49:07,106 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 01:49:07,106 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 01:49:07,106 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 01:49:07,107 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 01:49:07,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:49:07,107 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 01:49:07,107 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 01:49:07,107 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 01:49:07,108 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 01:49:07,108 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 01:49:07,108 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 01:49:07,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:49:07,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:49:07,109 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 01:49:07,110 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 01:49:07,307 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:49:07,310 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:49:08,592 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:49:09,470 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:49:09,470 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 01:49:09,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:49:09 BoogieIcfgContainer [2022-11-22 01:49:09,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:49:09,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:49:09,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:49:09,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:49:09,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:49:05" (1/3) ... [2022-11-22 01:49:09,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17985390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:49:09, skipping insertion in model container [2022-11-22 01:49:09,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:49:06" (2/3) ... [2022-11-22 01:49:09,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17985390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:49:09, skipping insertion in model container [2022-11-22 01:49:09,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:49:09" (3/3) ... [2022-11-22 01:49:09,493 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product26.cil.c [2022-11-22 01:49:09,518 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:49:09,519 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:49:09,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:49:09,609 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;@75c21b13, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:49:09,610 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:49:09,618 INFO L276 IsEmpty]: Start isEmpty. Operand has 356 states, 241 states have (on average 1.6182572614107884) internal successors, (390), 264 states have internal predecessors, (390), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) [2022-11-22 01:49:09,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-22 01:49:09,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:09,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:49:09,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:09,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:09,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1992612055, now seen corresponding path program 1 times [2022-11-22 01:49:09,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:09,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935392973] [2022-11-22 01:49:09,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:09,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:49:10,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:10,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935392973] [2022-11-22 01:49:10,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935392973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:10,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:49:10,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:49:10,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731531159] [2022-11-22 01:49:10,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:10,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 01:49:10,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:10,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 01:49:10,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 01:49:10,259 INFO L87 Difference]: Start difference. First operand has 356 states, 241 states have (on average 1.6182572614107884) internal successors, (390), 264 states have internal predecessors, (390), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 01:49:10,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:10,497 INFO L93 Difference]: Finished difference Result 374 states and 599 transitions. [2022-11-22 01:49:10,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 01:49:10,500 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-11-22 01:49:10,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:10,527 INFO L225 Difference]: With dead ends: 374 [2022-11-22 01:49:10,528 INFO L226 Difference]: Without dead ends: 352 [2022-11-22 01:49:10,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 01:49:10,536 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:10,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 530 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:49:10,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-11-22 01:49:10,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2022-11-22 01:49:10,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 239 states have (on average 1.606694560669456) internal successors, (384), 260 states have internal predecessors, (384), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 83 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-22 01:49:10,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 561 transitions. [2022-11-22 01:49:10,648 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 561 transitions. Word has length 39 [2022-11-22 01:49:10,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:10,649 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 561 transitions. [2022-11-22 01:49:10,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 01:49:10,650 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 561 transitions. [2022-11-22 01:49:10,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 01:49:10,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:10,654 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] [2022-11-22 01:49:10,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:49:10,654 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:10,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:10,655 INFO L85 PathProgramCache]: Analyzing trace with hash -707727992, now seen corresponding path program 1 times [2022-11-22 01:49:10,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:10,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141156280] [2022-11-22 01:49:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:10,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:49:11,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:11,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141156280] [2022-11-22 01:49:11,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141156280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:11,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:49:11,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:49:11,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264530912] [2022-11-22 01:49:11,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:11,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:49:11,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:11,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:49:11,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:49:11,130 INFO L87 Difference]: Start difference. First operand 352 states and 561 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-22 01:49:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:13,635 INFO L93 Difference]: Finished difference Result 1156 states and 1884 transitions. [2022-11-22 01:49:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:49:13,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-11-22 01:49:13,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:13,646 INFO L225 Difference]: With dead ends: 1156 [2022-11-22 01:49:13,646 INFO L226 Difference]: Without dead ends: 820 [2022-11-22 01:49:13,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:49:13,660 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 1163 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 1956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:13,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1223 Valid, 1064 Invalid, 1956 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [411 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-22 01:49:13,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-11-22 01:49:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 733. [2022-11-22 01:49:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 521 states have (on average 1.6314779270633397) internal successors, (850), 551 states have internal predecessors, (850), 174 states have call successors, (174), 36 states have call predecessors, (174), 37 states have return successors, (176), 158 states have call predecessors, (176), 169 states have call successors, (176) [2022-11-22 01:49:13,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1200 transitions. [2022-11-22 01:49:13,778 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1200 transitions. Word has length 40 [2022-11-22 01:49:13,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:13,778 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 1200 transitions. [2022-11-22 01:49:13,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-22 01:49:13,779 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1200 transitions. [2022-11-22 01:49:13,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-22 01:49:13,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:13,788 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:49:13,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:49:13,789 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:13,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:13,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1073773829, now seen corresponding path program 1 times [2022-11-22 01:49:13,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:13,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930706163] [2022-11-22 01:49:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:13,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:49:14,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:14,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930706163] [2022-11-22 01:49:14,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930706163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:14,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:49:14,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:49:14,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116632187] [2022-11-22 01:49:14,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:14,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:49:14,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:14,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:49:14,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:49:14,249 INFO L87 Difference]: Start difference. First operand 733 states and 1200 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 01:49:16,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:16,980 INFO L93 Difference]: Finished difference Result 2499 states and 4138 transitions. [2022-11-22 01:49:16,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 01:49:16,981 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2022-11-22 01:49:16,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:16,994 INFO L225 Difference]: With dead ends: 2499 [2022-11-22 01:49:16,994 INFO L226 Difference]: Without dead ends: 1783 [2022-11-22 01:49:16,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:49:17,000 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 1639 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1702 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 3037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:17,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1702 Valid, 1717 Invalid, 3037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-22 01:49:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2022-11-22 01:49:17,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1696. [2022-11-22 01:49:17,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1233 states have (on average 1.64882400648824) internal successors, (2033), 1293 states have internal predecessors, (2033), 376 states have call successors, (376), 75 states have call predecessors, (376), 86 states have return successors, (403), 351 states have call predecessors, (403), 371 states have call successors, (403) [2022-11-22 01:49:17,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2812 transitions. [2022-11-22 01:49:17,181 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2812 transitions. Word has length 62 [2022-11-22 01:49:17,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:17,182 INFO L495 AbstractCegarLoop]: Abstraction has 1696 states and 2812 transitions. [2022-11-22 01:49:17,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 01:49:17,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2812 transitions. [2022-11-22 01:49:17,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-22 01:49:17,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:17,188 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:49:17,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:49:17,189 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:17,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:17,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1978141964, now seen corresponding path program 1 times [2022-11-22 01:49:17,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:17,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192564018] [2022-11-22 01:49:17,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:17,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:49:17,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:17,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192564018] [2022-11-22 01:49:17,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192564018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:17,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:49:17,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:49:17,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201920511] [2022-11-22 01:49:17,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:17,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:49:17,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:17,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:49:17,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:49:17,466 INFO L87 Difference]: Start difference. First operand 1696 states and 2812 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-22 01:49:17,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:17,755 INFO L93 Difference]: Finished difference Result 2734 states and 4540 transitions. [2022-11-22 01:49:17,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:49:17,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2022-11-22 01:49:17,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:17,775 INFO L225 Difference]: With dead ends: 2734 [2022-11-22 01:49:17,775 INFO L226 Difference]: Without dead ends: 1736 [2022-11-22 01:49:17,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:49:17,790 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 7 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2081 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:17,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2081 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:49:17,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2022-11-22 01:49:17,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1720. [2022-11-22 01:49:17,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1251 states have (on average 1.6394884092725819) internal successors, (2051), 1311 states have internal predecessors, (2051), 376 states have call successors, (376), 75 states have call predecessors, (376), 92 states have return successors, (415), 357 states have call predecessors, (415), 371 states have call successors, (415) [2022-11-22 01:49:17,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 2842 transitions. [2022-11-22 01:49:17,922 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 2842 transitions. Word has length 66 [2022-11-22 01:49:17,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:17,924 INFO L495 AbstractCegarLoop]: Abstraction has 1720 states and 2842 transitions. [2022-11-22 01:49:17,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-22 01:49:17,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 2842 transitions. [2022-11-22 01:49:17,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-22 01:49:17,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:17,937 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:49:17,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:49:17,937 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:17,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:17,938 INFO L85 PathProgramCache]: Analyzing trace with hash 448744988, now seen corresponding path program 1 times [2022-11-22 01:49:17,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:17,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281819146] [2022-11-22 01:49:17,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:17,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:49:18,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:18,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281819146] [2022-11-22 01:49:18,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281819146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:18,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:49:18,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 01:49:18,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923798840] [2022-11-22 01:49:18,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:18,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:49:18,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:18,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:49:18,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:49:18,391 INFO L87 Difference]: Start difference. First operand 1720 states and 2842 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-22 01:49:21,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:21,311 INFO L93 Difference]: Finished difference Result 3888 states and 6426 transitions. [2022-11-22 01:49:21,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:49:21,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 70 [2022-11-22 01:49:21,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:21,336 INFO L225 Difference]: With dead ends: 3888 [2022-11-22 01:49:21,336 INFO L226 Difference]: Without dead ends: 2674 [2022-11-22 01:49:21,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:49:21,346 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 1339 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 2664 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 3154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 2664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:21,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1487 Valid, 1524 Invalid, 3154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 2664 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-22 01:49:21,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2022-11-22 01:49:21,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2508. [2022-11-22 01:49:21,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 1796 states have (on average 1.596325167037862) internal successors, (2867), 1887 states have internal predecessors, (2867), 560 states have call successors, (560), 122 states have call predecessors, (560), 151 states have return successors, (635), 533 states have call predecessors, (635), 555 states have call successors, (635) [2022-11-22 01:49:21,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 4062 transitions. [2022-11-22 01:49:21,628 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 4062 transitions. Word has length 70 [2022-11-22 01:49:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:21,629 INFO L495 AbstractCegarLoop]: Abstraction has 2508 states and 4062 transitions. [2022-11-22 01:49:21,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-22 01:49:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 4062 transitions. [2022-11-22 01:49:21,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 01:49:21,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:21,633 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:49:21,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:49:21,633 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:21,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:21,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1943928479, now seen corresponding path program 1 times [2022-11-22 01:49:21,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:21,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640205928] [2022-11-22 01:49:21,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:21,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:49:22,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:22,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640205928] [2022-11-22 01:49:22,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640205928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:22,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:49:22,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-22 01:49:22,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921222170] [2022-11-22 01:49:22,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:22,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 01:49:22,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:22,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 01:49:22,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:49:22,065 INFO L87 Difference]: Start difference. First operand 2508 states and 4062 transitions. Second operand has 11 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 6 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-22 01:49:26,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:26,904 INFO L93 Difference]: Finished difference Result 7909 states and 13086 transitions. [2022-11-22 01:49:26,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-22 01:49:26,905 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 6 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 73 [2022-11-22 01:49:26,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:26,940 INFO L225 Difference]: With dead ends: 7909 [2022-11-22 01:49:26,941 INFO L226 Difference]: Without dead ends: 4877 [2022-11-22 01:49:26,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2022-11-22 01:49:26,962 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 2041 mSDsluCounter, 2760 mSDsCounter, 0 mSdLazyCounter, 5564 mSolverCounterSat, 1156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2059 SdHoareTripleChecker+Valid, 3261 SdHoareTripleChecker+Invalid, 6720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1156 IncrementalHoareTripleChecker+Valid, 5564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:26,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2059 Valid, 3261 Invalid, 6720 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1156 Valid, 5564 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-22 01:49:26,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4877 states. [2022-11-22 01:49:27,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4877 to 4619. [2022-11-22 01:49:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4619 states, 3236 states have (on average 1.5454264524103831) internal successors, (5001), 3417 states have internal predecessors, (5001), 1118 states have call successors, (1118), 204 states have call predecessors, (1118), 264 states have return successors, (1254), 1074 states have call predecessors, (1254), 1113 states have call successors, (1254) [2022-11-22 01:49:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4619 states to 4619 states and 7373 transitions. [2022-11-22 01:49:27,476 INFO L78 Accepts]: Start accepts. Automaton has 4619 states and 7373 transitions. Word has length 73 [2022-11-22 01:49:27,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:27,478 INFO L495 AbstractCegarLoop]: Abstraction has 4619 states and 7373 transitions. [2022-11-22 01:49:27,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 6 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-22 01:49:27,479 INFO L276 IsEmpty]: Start isEmpty. Operand 4619 states and 7373 transitions. [2022-11-22 01:49:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-22 01:49:27,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:27,481 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:49:27,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:49:27,482 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:27,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:27,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1566716254, now seen corresponding path program 1 times [2022-11-22 01:49:27,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:27,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981722679] [2022-11-22 01:49:27,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:27,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:49:27,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:27,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981722679] [2022-11-22 01:49:27,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981722679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:27,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:49:27,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:49:27,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649926233] [2022-11-22 01:49:27,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:27,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:49:27,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:27,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:49:27,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:49:27,865 INFO L87 Difference]: Start difference. First operand 4619 states and 7373 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-22 01:49:30,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:30,489 INFO L93 Difference]: Finished difference Result 9164 states and 14665 transitions. [2022-11-22 01:49:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 01:49:30,490 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2022-11-22 01:49:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:30,523 INFO L225 Difference]: With dead ends: 9164 [2022-11-22 01:49:30,523 INFO L226 Difference]: Without dead ends: 5167 [2022-11-22 01:49:30,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:49:30,545 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 924 mSDsluCounter, 1214 mSDsCounter, 0 mSdLazyCounter, 2322 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 2695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 2322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:30,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 1585 Invalid, 2695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 2322 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-22 01:49:30,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5167 states. [2022-11-22 01:49:30,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5167 to 4709. [2022-11-22 01:49:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4709 states, 3296 states have (on average 1.539745145631068) internal successors, (5075), 3491 states have internal predecessors, (5075), 1120 states have call successors, (1120), 220 states have call predecessors, (1120), 292 states have return successors, (1292), 1074 states have call predecessors, (1292), 1115 states have call successors, (1292) [2022-11-22 01:49:30,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4709 states to 4709 states and 7487 transitions. [2022-11-22 01:49:30,998 INFO L78 Accepts]: Start accepts. Automaton has 4709 states and 7487 transitions. Word has length 75 [2022-11-22 01:49:30,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:30,999 INFO L495 AbstractCegarLoop]: Abstraction has 4709 states and 7487 transitions. [2022-11-22 01:49:31,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-22 01:49:31,000 INFO L276 IsEmpty]: Start isEmpty. Operand 4709 states and 7487 transitions. [2022-11-22 01:49:31,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-22 01:49:31,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:31,006 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:49:31,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:49:31,006 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:31,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:31,007 INFO L85 PathProgramCache]: Analyzing trace with hash 600401345, now seen corresponding path program 1 times [2022-11-22 01:49:31,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:31,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142018527] [2022-11-22 01:49:31,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:31,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:49:31,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:31,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142018527] [2022-11-22 01:49:31,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142018527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:31,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:49:31,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:49:31,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799786317] [2022-11-22 01:49:31,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:31,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:49:31,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:31,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:49:31,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:49:31,451 INFO L87 Difference]: Start difference. First operand 4709 states and 7487 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-22 01:49:32,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:32,562 INFO L93 Difference]: Finished difference Result 4811 states and 7653 transitions. [2022-11-22 01:49:32,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:49:32,564 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), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 79 [2022-11-22 01:49:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:32,591 INFO L225 Difference]: With dead ends: 4811 [2022-11-22 01:49:32,592 INFO L226 Difference]: Without dead ends: 4796 [2022-11-22 01:49:32,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:49:32,596 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 616 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:32,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 1704 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:49:32,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4796 states. [2022-11-22 01:49:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4796 to 4715. [2022-11-22 01:49:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4715 states, 3302 states have (on average 1.5387643852210782) internal successors, (5081), 3497 states have internal predecessors, (5081), 1120 states have call successors, (1120), 220 states have call predecessors, (1120), 292 states have return successors, (1292), 1074 states have call predecessors, (1292), 1115 states have call successors, (1292) [2022-11-22 01:49:33,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4715 states to 4715 states and 7493 transitions. [2022-11-22 01:49:33,038 INFO L78 Accepts]: Start accepts. Automaton has 4715 states and 7493 transitions. Word has length 79 [2022-11-22 01:49:33,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:33,038 INFO L495 AbstractCegarLoop]: Abstraction has 4715 states and 7493 transitions. [2022-11-22 01:49:33,039 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), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-22 01:49:33,039 INFO L276 IsEmpty]: Start isEmpty. Operand 4715 states and 7493 transitions. [2022-11-22 01:49:33,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-22 01:49:33,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:33,044 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:49:33,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:49:33,044 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:33,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:33,045 INFO L85 PathProgramCache]: Analyzing trace with hash 731164389, now seen corresponding path program 1 times [2022-11-22 01:49:33,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:33,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043547769] [2022-11-22 01:49:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:33,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:49:33,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:33,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043547769] [2022-11-22 01:49:33,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043547769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:33,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:49:33,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-22 01:49:33,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082906778] [2022-11-22 01:49:33,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:33,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 01:49:33,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:33,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 01:49:33,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:49:33,634 INFO L87 Difference]: Start difference. First operand 4715 states and 7493 transitions. Second operand has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-22 01:49:39,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:39,700 INFO L93 Difference]: Finished difference Result 5291 states and 8387 transitions. [2022-11-22 01:49:39,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-22 01:49:39,702 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 84 [2022-11-22 01:49:39,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:39,741 INFO L225 Difference]: With dead ends: 5291 [2022-11-22 01:49:39,741 INFO L226 Difference]: Without dead ends: 5274 [2022-11-22 01:49:39,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 01:49:39,746 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 2567 mSDsluCounter, 3180 mSDsCounter, 0 mSdLazyCounter, 7155 mSolverCounterSat, 1440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2590 SdHoareTripleChecker+Valid, 3700 SdHoareTripleChecker+Invalid, 8595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1440 IncrementalHoareTripleChecker+Valid, 7155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:39,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2590 Valid, 3700 Invalid, 8595 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1440 Valid, 7155 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-22 01:49:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5274 states. [2022-11-22 01:49:40,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5274 to 4997. [2022-11-22 01:49:40,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4997 states, 3528 states have (on average 1.5470521541950113) internal successors, (5458), 3721 states have internal predecessors, (5458), 1139 states have call successors, (1139), 258 states have call predecessors, (1139), 329 states have return successors, (1315), 1094 states have call predecessors, (1315), 1134 states have call successors, (1315) [2022-11-22 01:49:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4997 states to 4997 states and 7912 transitions. [2022-11-22 01:49:40,250 INFO L78 Accepts]: Start accepts. Automaton has 4997 states and 7912 transitions. Word has length 84 [2022-11-22 01:49:40,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:40,251 INFO L495 AbstractCegarLoop]: Abstraction has 4997 states and 7912 transitions. [2022-11-22 01:49:40,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-22 01:49:40,252 INFO L276 IsEmpty]: Start isEmpty. Operand 4997 states and 7912 transitions. [2022-11-22 01:49:40,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-22 01:49:40,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:40,255 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:49:40,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:49:40,255 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:40,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:40,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1844424089, now seen corresponding path program 1 times [2022-11-22 01:49:40,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:40,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868894441] [2022-11-22 01:49:40,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:40,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:49:40,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:40,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868894441] [2022-11-22 01:49:40,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868894441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:40,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:49:40,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:49:40,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251310697] [2022-11-22 01:49:40,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:40,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:49:40,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:40,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:49:40,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:49:40,592 INFO L87 Difference]: Start difference. First operand 4997 states and 7912 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 01:49:42,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:42,749 INFO L93 Difference]: Finished difference Result 13419 states and 21520 transitions. [2022-11-22 01:49:42,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:49:42,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2022-11-22 01:49:42,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:42,807 INFO L225 Difference]: With dead ends: 13419 [2022-11-22 01:49:42,808 INFO L226 Difference]: Without dead ends: 8442 [2022-11-22 01:49:42,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:49:42,836 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 1083 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1147 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:42,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1147 Valid, 699 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-22 01:49:42,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8442 states. [2022-11-22 01:49:43,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8442 to 7831. [2022-11-22 01:49:43,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7831 states, 5540 states have (on average 1.5431407942238267) internal successors, (8549), 5860 states have internal predecessors, (8549), 1766 states have call successors, (1766), 388 states have call predecessors, (1766), 524 states have return successors, (2124), 1687 states have call predecessors, (2124), 1761 states have call successors, (2124) [2022-11-22 01:49:43,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7831 states to 7831 states and 12439 transitions. [2022-11-22 01:49:43,676 INFO L78 Accepts]: Start accepts. Automaton has 7831 states and 12439 transitions. Word has length 94 [2022-11-22 01:49:43,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:43,677 INFO L495 AbstractCegarLoop]: Abstraction has 7831 states and 12439 transitions. [2022-11-22 01:49:43,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 01:49:43,677 INFO L276 IsEmpty]: Start isEmpty. Operand 7831 states and 12439 transitions. [2022-11-22 01:49:43,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-22 01:49:43,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:43,690 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:49:43,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 01:49:43,691 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:43,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:43,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1342701045, now seen corresponding path program 1 times [2022-11-22 01:49:43,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:43,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251325411] [2022-11-22 01:49:43,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:43,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:49:44,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:44,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251325411] [2022-11-22 01:49:44,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251325411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:44,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:49:44,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:49:44,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832605656] [2022-11-22 01:49:44,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:44,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:49:44,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:44,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:49:44,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:49:44,004 INFO L87 Difference]: Start difference. First operand 7831 states and 12439 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 01:49:46,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:46,675 INFO L93 Difference]: Finished difference Result 21727 states and 35133 transitions. [2022-11-22 01:49:46,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:49:46,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2022-11-22 01:49:46,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:46,766 INFO L225 Difference]: With dead ends: 21727 [2022-11-22 01:49:46,766 INFO L226 Difference]: Without dead ends: 13919 [2022-11-22 01:49:46,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:49:46,807 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1070 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:46,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 708 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-22 01:49:46,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13919 states. [2022-11-22 01:49:48,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13919 to 13187. [2022-11-22 01:49:48,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13187 states, 9351 states have (on average 1.5409047160731473) internal successors, (14409), 9949 states have internal predecessors, (14409), 2921 states have call successors, (2921), 648 states have call predecessors, (2921), 914 states have return successors, (3751), 2764 states have call predecessors, (3751), 2916 states have call successors, (3751) [2022-11-22 01:49:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13187 states to 13187 states and 21081 transitions. [2022-11-22 01:49:48,273 INFO L78 Accepts]: Start accepts. Automaton has 13187 states and 21081 transitions. Word has length 95 [2022-11-22 01:49:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:48,273 INFO L495 AbstractCegarLoop]: Abstraction has 13187 states and 21081 transitions. [2022-11-22 01:49:48,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 01:49:48,274 INFO L276 IsEmpty]: Start isEmpty. Operand 13187 states and 21081 transitions. [2022-11-22 01:49:48,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-22 01:49:48,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:48,278 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:49:48,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 01:49:48,278 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:48,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:48,279 INFO L85 PathProgramCache]: Analyzing trace with hash 200342129, now seen corresponding path program 1 times [2022-11-22 01:49:48,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:48,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982639934] [2022-11-22 01:49:48,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:48,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:49:48,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:48,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982639934] [2022-11-22 01:49:48,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982639934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:48,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:49:48,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:49:48,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882219411] [2022-11-22 01:49:48,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:48,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:49:48,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:48,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:49:48,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:49:48,541 INFO L87 Difference]: Start difference. First operand 13187 states and 21081 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-22 01:49:52,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:52,189 INFO L93 Difference]: Finished difference Result 37971 states and 62470 transitions. [2022-11-22 01:49:52,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:49:52,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 93 [2022-11-22 01:49:52,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:52,364 INFO L225 Difference]: With dead ends: 37971 [2022-11-22 01:49:52,364 INFO L226 Difference]: Without dead ends: 24813 [2022-11-22 01:49:52,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:49:52,431 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 1063 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1127 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:52,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1127 Valid, 717 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-22 01:49:52,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24813 states. [2022-11-22 01:49:55,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24813 to 23790. [2022-11-22 01:49:55,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23790 states, 16878 states have (on average 1.536378717857566) internal successors, (25931), 18060 states have internal predecessors, (25931), 5189 states have call successors, (5189), 1168 states have call predecessors, (5189), 1722 states have return successors, (7407), 4876 states have call predecessors, (7407), 5184 states have call successors, (7407) [2022-11-22 01:49:55,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23790 states to 23790 states and 38527 transitions. [2022-11-22 01:49:55,801 INFO L78 Accepts]: Start accepts. Automaton has 23790 states and 38527 transitions. Word has length 93 [2022-11-22 01:49:55,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:55,802 INFO L495 AbstractCegarLoop]: Abstraction has 23790 states and 38527 transitions. [2022-11-22 01:49:55,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-22 01:49:55,803 INFO L276 IsEmpty]: Start isEmpty. Operand 23790 states and 38527 transitions. [2022-11-22 01:49:55,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-22 01:49:55,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:55,807 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:49:55,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 01:49:55,807 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:55,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:55,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1915517381, now seen corresponding path program 1 times [2022-11-22 01:49:55,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:55,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377225309] [2022-11-22 01:49:55,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:55,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:49:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:49:56,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:49:56,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377225309] [2022-11-22 01:49:56,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377225309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:56,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:49:56,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:49:56,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771172379] [2022-11-22 01:49:56,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:56,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:49:56,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:49:56,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:49:56,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:49:56,139 INFO L87 Difference]: Start difference. First operand 23790 states and 38527 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-22 01:50:02,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:02,105 INFO L93 Difference]: Finished difference Result 70144 states and 119121 transitions. [2022-11-22 01:50:02,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:50:02,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 94 [2022-11-22 01:50:02,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:02,388 INFO L225 Difference]: With dead ends: 70144 [2022-11-22 01:50:02,389 INFO L226 Difference]: Without dead ends: 46395 [2022-11-22 01:50:02,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:50:02,492 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 1050 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:02,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 729 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 01:50:02,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46395 states. [2022-11-22 01:50:07,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46395 to 44741. [2022-11-22 01:50:07,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44741 states, 31717 states have (on average 1.5300627423779045) internal successors, (48529), 34123 states have internal predecessors, (48529), 9629 states have call successors, (9629), 2208 states have call predecessors, (9629), 3394 states have return successors, (16099), 9004 states have call predecessors, (16099), 9624 states have call successors, (16099) [2022-11-22 01:50:07,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44741 states to 44741 states and 74257 transitions. [2022-11-22 01:50:07,709 INFO L78 Accepts]: Start accepts. Automaton has 44741 states and 74257 transitions. Word has length 94 [2022-11-22 01:50:07,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:07,711 INFO L495 AbstractCegarLoop]: Abstraction has 44741 states and 74257 transitions. [2022-11-22 01:50:07,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-22 01:50:07,714 INFO L276 IsEmpty]: Start isEmpty. Operand 44741 states and 74257 transitions. [2022-11-22 01:50:07,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-22 01:50:07,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:07,716 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:50:07,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 01:50:07,717 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:07,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:07,717 INFO L85 PathProgramCache]: Analyzing trace with hash -748620749, now seen corresponding path program 1 times [2022-11-22 01:50:07,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:07,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391966679] [2022-11-22 01:50:07,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:07,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:50:07,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:07,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391966679] [2022-11-22 01:50:07,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391966679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:07,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:50:07,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:50:07,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168476922] [2022-11-22 01:50:07,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:07,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:50:07,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:50:07,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:50:07,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:50:07,976 INFO L87 Difference]: Start difference. First operand 44741 states and 74257 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-22 01:50:17,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:17,723 INFO L93 Difference]: Finished difference Result 134128 states and 240728 transitions. [2022-11-22 01:50:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:50:17,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 95 [2022-11-22 01:50:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:18,352 INFO L225 Difference]: With dead ends: 134128 [2022-11-22 01:50:18,353 INFO L226 Difference]: Without dead ends: 89442 [2022-11-22 01:50:18,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:50:18,731 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 1059 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:18,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1121 Valid, 722 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-22 01:50:18,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89442 states.