./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc85082-5c54-44d4-b92a-c4308e3dbdc7/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc85082-5c54-44d4-b92a-c4308e3dbdc7/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc85082-5c54-44d4-b92a-c4308e3dbdc7/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc85082-5c54-44d4-b92a-c4308e3dbdc7/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc85082-5c54-44d4-b92a-c4308e3dbdc7/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc85082-5c54-44d4-b92a-c4308e3dbdc7/bin/utaipan-UUZaoUuFF8 --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 0ffe39e5069596e29b504492c7e6b50a86ab43c69c1a6acd2a45f3ed316ecfd7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:03:11,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:03:11,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:03:11,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:03:11,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:03:11,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:03:11,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:03:11,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:03:11,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:03:11,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:03:11,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:03:11,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:03:11,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:03:11,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:03:11,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:03:11,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:03:11,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:03:11,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:03:11,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:03:11,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:03:11,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:03:11,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:03:11,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:03:11,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:03:11,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:03:11,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:03:11,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:03:11,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:03:11,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:03:11,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:03:11,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:03:11,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:03:11,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:03:11,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:03:11,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:03:11,655 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:03:11,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:03:11,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:03:11,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:03:11,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:03:11,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:03:11,661 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc85082-5c54-44d4-b92a-c4308e3dbdc7/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:03:11,717 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:03:11,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:03:11,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:03:11,719 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:03:11,719 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:03:11,719 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:03:11,720 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:03:11,720 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:03:11,726 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:03:11,727 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:03:11,728 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:03:11,728 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:03:11,728 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:03:11,729 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:03:11,729 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:03:11,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:03:11,730 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:03:11,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:03:11,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:03:11,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:03:11,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:03:11,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:03:11,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:03:11,732 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:03:11,732 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:03:11,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:03:11,733 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:03:11,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:03:11,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:03:11,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:03:11,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:03:11,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:03:11,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:03:11,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:03:11,736 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:03:11,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:03:11,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:03:11,737 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:03:11,737 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:03:11,737 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc85082-5c54-44d4-b92a-c4308e3dbdc7/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc85082-5c54-44d4-b92a-c4308e3dbdc7/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ffe39e5069596e29b504492c7e6b50a86ab43c69c1a6acd2a45f3ed316ecfd7 [2021-11-07 01:03:12,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:03:12,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:03:12,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:03:12,057 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:03:12,057 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:03:12,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc85082-5c54-44d4-b92a-c4308e3dbdc7/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-07 01:03:12,127 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc85082-5c54-44d4-b92a-c4308e3dbdc7/bin/utaipan-UUZaoUuFF8/data/a3113501d/0c01a7a36f1a4e8cb23184fde71d6c08/FLAG72eaf7bb1 [2021-11-07 01:03:12,715 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:03:12,715 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc85082-5c54-44d4-b92a-c4308e3dbdc7/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-07 01:03:12,737 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc85082-5c54-44d4-b92a-c4308e3dbdc7/bin/utaipan-UUZaoUuFF8/data/a3113501d/0c01a7a36f1a4e8cb23184fde71d6c08/FLAG72eaf7bb1 [2021-11-07 01:03:12,971 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc85082-5c54-44d4-b92a-c4308e3dbdc7/bin/utaipan-UUZaoUuFF8/data/a3113501d/0c01a7a36f1a4e8cb23184fde71d6c08 [2021-11-07 01:03:12,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:03:12,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:03:12,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:12,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:03:12,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:03:12,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:12" (1/1) ... [2021-11-07 01:03:12,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@352fe011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:12, skipping insertion in model container [2021-11-07 01:03:12,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:12" (1/1) ... [2021-11-07 01:03:13,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:03:13,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:03:13,506 WARN L228 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_efc85082-5c54-44d4-b92a-c4308e3dbdc7/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[15966,15979] [2021-11-07 01:03:13,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:13,613 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:03:13,758 WARN L228 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_efc85082-5c54-44d4-b92a-c4308e3dbdc7/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[15966,15979] [2021-11-07 01:03:13,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:13,840 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:03:13,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:13 WrapperNode [2021-11-07 01:03:13,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:13,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:03:13,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:03:13,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:03:13,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:13" (1/1) ... [2021-11-07 01:03:13,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:13" (1/1) ... [2021-11-07 01:03:13,974 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:03:13,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:03:13,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:03:13,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:03:13,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:13" (1/1) ... [2021-11-07 01:03:13,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:13" (1/1) ... [2021-11-07 01:03:14,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:13" (1/1) ... [2021-11-07 01:03:14,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:13" (1/1) ... [2021-11-07 01:03:14,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:13" (1/1) ... [2021-11-07 01:03:14,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:13" (1/1) ... [2021-11-07 01:03:14,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:13" (1/1) ... [2021-11-07 01:03:14,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:03:14,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:03:14,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:03:14,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:03:14,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:13" (1/1) ... [2021-11-07 01:03:14,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:03:14,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc85082-5c54-44d4-b92a-c4308e3dbdc7/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:03:14,151 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc85082-5c54-44d4-b92a-c4308e3dbdc7/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:03:14,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efc85082-5c54-44d4-b92a-c4308e3dbdc7/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:03:14,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:03:14,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:03:14,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:03:14,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:03:16,645 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:03:16,645 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:03:16,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:03:16 BoogieIcfgContainer [2021-11-07 01:03:16,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:03:16,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:03:16,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:03:16,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:03:16,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:03:12" (1/3) ... [2021-11-07 01:03:16,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d2ef41f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:03:16, skipping insertion in model container [2021-11-07 01:03:16,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:13" (2/3) ... [2021-11-07 01:03:16,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d2ef41f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:03:16, skipping insertion in model container [2021-11-07 01:03:16,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:03:16" (3/3) ... [2021-11-07 01:03:16,661 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-07 01:03:16,670 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:03:16,671 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:03:16,736 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:03:16,745 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:03:16,747 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:03:16,778 INFO L276 IsEmpty]: Start isEmpty. Operand has 249 states, 247 states have (on average 1.777327935222672) internal successors, (439), 248 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:16,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 01:03:16,800 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:16,801 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:16,802 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:16,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:16,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1108360375, now seen corresponding path program 1 times [2021-11-07 01:03:16,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:16,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325178025] [2021-11-07 01:03:16,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:16,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:17,758 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:17,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325178025] [2021-11-07 01:03:17,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325178025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:17,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:17,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:03:17,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415284484] [2021-11-07 01:03:17,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:03:17,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:17,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:03:17,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:17,787 INFO L87 Difference]: Start difference. First operand has 249 states, 247 states have (on average 1.777327935222672) internal successors, (439), 248 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:18,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:18,056 INFO L93 Difference]: Finished difference Result 607 states and 1061 transitions. [2021-11-07 01:03:18,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:03:18,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-07 01:03:18,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:18,073 INFO L225 Difference]: With dead ends: 607 [2021-11-07 01:03:18,073 INFO L226 Difference]: Without dead ends: 423 [2021-11-07 01:03:18,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:03:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-07 01:03:18,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 421. [2021-11-07 01:03:18,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.3857142857142857) internal successors, (582), 420 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:18,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 582 transitions. [2021-11-07 01:03:18,170 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 582 transitions. Word has length 116 [2021-11-07 01:03:18,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:18,171 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 582 transitions. [2021-11-07 01:03:18,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 582 transitions. [2021-11-07 01:03:18,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 01:03:18,181 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:18,181 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:18,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:03:18,182 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:18,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:18,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1311660061, now seen corresponding path program 1 times [2021-11-07 01:03:18,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:18,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799023100] [2021-11-07 01:03:18,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:18,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:18,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:18,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799023100] [2021-11-07 01:03:18,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799023100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:18,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:18,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:03:18,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074955462] [2021-11-07 01:03:18,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:03:18,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:18,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:03:18,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:18,330 INFO L87 Difference]: Start difference. First operand 421 states and 582 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:18,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:18,462 INFO L93 Difference]: Finished difference Result 948 states and 1339 transitions. [2021-11-07 01:03:18,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:03:18,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-07 01:03:18,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:18,470 INFO L225 Difference]: With dead ends: 948 [2021-11-07 01:03:18,470 INFO L226 Difference]: Without dead ends: 589 [2021-11-07 01:03:18,475 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:18,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-07 01:03:18,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 530. [2021-11-07 01:03:18,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 1.4291115311909264) internal successors, (756), 529 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:18,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 756 transitions. [2021-11-07 01:03:18,541 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 756 transitions. Word has length 118 [2021-11-07 01:03:18,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:18,543 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 756 transitions. [2021-11-07 01:03:18,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:18,543 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 756 transitions. [2021-11-07 01:03:18,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 01:03:18,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:18,552 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:18,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:03:18,553 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:18,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:18,564 INFO L85 PathProgramCache]: Analyzing trace with hash -386359019, now seen corresponding path program 1 times [2021-11-07 01:03:18,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:18,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469822707] [2021-11-07 01:03:18,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:18,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:18,676 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:18,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469822707] [2021-11-07 01:03:18,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469822707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:18,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:18,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:03:18,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766696439] [2021-11-07 01:03:18,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:03:18,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:18,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:03:18,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:18,687 INFO L87 Difference]: Start difference. First operand 530 states and 756 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:18,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:18,797 INFO L93 Difference]: Finished difference Result 1215 states and 1775 transitions. [2021-11-07 01:03:18,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:03:18,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-07 01:03:18,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:18,805 INFO L225 Difference]: With dead ends: 1215 [2021-11-07 01:03:18,805 INFO L226 Difference]: Without dead ends: 772 [2021-11-07 01:03:18,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:18,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-11-07 01:03:18,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 734. [2021-11-07 01:03:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 1.4788540245566166) internal successors, (1084), 733 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:18,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1084 transitions. [2021-11-07 01:03:18,874 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1084 transitions. Word has length 118 [2021-11-07 01:03:18,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:18,875 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 1084 transitions. [2021-11-07 01:03:18,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:18,876 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1084 transitions. [2021-11-07 01:03:18,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 01:03:18,901 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:18,902 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:18,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:03:18,904 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:18,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:18,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1169225483, now seen corresponding path program 1 times [2021-11-07 01:03:18,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:18,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529507153] [2021-11-07 01:03:18,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:18,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:19,071 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:19,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529507153] [2021-11-07 01:03:19,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529507153] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:19,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:19,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:03:19,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115223363] [2021-11-07 01:03:19,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:03:19,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:19,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:03:19,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:19,079 INFO L87 Difference]: Start difference. First operand 734 states and 1084 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:19,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:19,322 INFO L93 Difference]: Finished difference Result 1410 states and 2096 transitions. [2021-11-07 01:03:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:03:19,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-07 01:03:19,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:19,330 INFO L225 Difference]: With dead ends: 1410 [2021-11-07 01:03:19,330 INFO L226 Difference]: Without dead ends: 734 [2021-11-07 01:03:19,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:03:19,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-11-07 01:03:19,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2021-11-07 01:03:19,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 1.4583901773533425) internal successors, (1069), 733 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1069 transitions. [2021-11-07 01:03:19,425 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1069 transitions. Word has length 121 [2021-11-07 01:03:19,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:19,426 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 1069 transitions. [2021-11-07 01:03:19,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:19,428 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1069 transitions. [2021-11-07 01:03:19,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 01:03:19,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:19,430 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:19,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:03:19,431 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:19,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:19,432 INFO L85 PathProgramCache]: Analyzing trace with hash 191248934, now seen corresponding path program 1 times [2021-11-07 01:03:19,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:19,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979770679] [2021-11-07 01:03:19,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:19,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:19,804 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:19,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979770679] [2021-11-07 01:03:19,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979770679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:19,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:19,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:03:19,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426992825] [2021-11-07 01:03:19,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:03:19,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:19,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:03:19,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:19,807 INFO L87 Difference]: Start difference. First operand 734 states and 1069 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:20,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:20,005 INFO L93 Difference]: Finished difference Result 1925 states and 2819 transitions. [2021-11-07 01:03:20,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:03:20,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-07 01:03:20,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:20,015 INFO L225 Difference]: With dead ends: 1925 [2021-11-07 01:03:20,015 INFO L226 Difference]: Without dead ends: 1284 [2021-11-07 01:03:20,017 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:20,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-11-07 01:03:20,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1282. [2021-11-07 01:03:20,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 1.4457455113192819) internal successors, (1852), 1281 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:20,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1852 transitions. [2021-11-07 01:03:20,183 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1852 transitions. Word has length 121 [2021-11-07 01:03:20,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:20,184 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 1852 transitions. [2021-11-07 01:03:20,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:20,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1852 transitions. [2021-11-07 01:03:20,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-07 01:03:20,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:20,187 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:20,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:03:20,188 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:20,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:20,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1721574809, now seen corresponding path program 1 times [2021-11-07 01:03:20,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:20,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577150720] [2021-11-07 01:03:20,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:20,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:20,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:20,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:20,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577150720] [2021-11-07 01:03:20,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577150720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:20,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:20,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:03:20,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252050517] [2021-11-07 01:03:20,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:03:20,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:20,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:03:20,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:20,269 INFO L87 Difference]: Start difference. First operand 1282 states and 1852 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:20,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:20,564 INFO L93 Difference]: Finished difference Result 3316 states and 4886 transitions. [2021-11-07 01:03:20,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:03:20,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-07 01:03:20,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:20,581 INFO L225 Difference]: With dead ends: 3316 [2021-11-07 01:03:20,581 INFO L226 Difference]: Without dead ends: 2081 [2021-11-07 01:03:20,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:20,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2021-11-07 01:03:20,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 1912. [2021-11-07 01:03:20,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 1.4866562009419153) internal successors, (2841), 1911 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:20,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 2841 transitions. [2021-11-07 01:03:20,814 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 2841 transitions. Word has length 123 [2021-11-07 01:03:20,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:20,816 INFO L470 AbstractCegarLoop]: Abstraction has 1912 states and 2841 transitions. [2021-11-07 01:03:20,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:20,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 2841 transitions. [2021-11-07 01:03:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 01:03:20,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:20,819 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:20,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:03:20,820 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:20,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:20,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2028328162, now seen corresponding path program 1 times [2021-11-07 01:03:20,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:20,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607407256] [2021-11-07 01:03:20,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:20,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:20,955 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:20,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607407256] [2021-11-07 01:03:20,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607407256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:20,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:20,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:03:20,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330477555] [2021-11-07 01:03:20,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:03:20,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:20,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:03:20,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:20,958 INFO L87 Difference]: Start difference. First operand 1912 states and 2841 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:21,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:21,339 INFO L93 Difference]: Finished difference Result 3423 states and 5117 transitions. [2021-11-07 01:03:21,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:03:21,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-07 01:03:21,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:21,353 INFO L225 Difference]: With dead ends: 3423 [2021-11-07 01:03:21,353 INFO L226 Difference]: Without dead ends: 1912 [2021-11-07 01:03:21,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:03:21,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-11-07 01:03:21,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1912. [2021-11-07 01:03:21,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 1.4740973312401884) internal successors, (2817), 1911 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 2817 transitions. [2021-11-07 01:03:21,622 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 2817 transitions. Word has length 126 [2021-11-07 01:03:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:21,622 INFO L470 AbstractCegarLoop]: Abstraction has 1912 states and 2817 transitions. [2021-11-07 01:03:21,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 2817 transitions. [2021-11-07 01:03:21,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 01:03:21,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:21,626 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:21,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:03:21,626 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:21,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:21,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1515776089, now seen corresponding path program 1 times [2021-11-07 01:03:21,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:21,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155495298] [2021-11-07 01:03:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:21,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:21,889 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:21,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155495298] [2021-11-07 01:03:21,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155495298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:21,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:21,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:03:21,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702385800] [2021-11-07 01:03:21,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:03:21,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:21,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:03:21,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:21,892 INFO L87 Difference]: Start difference. First operand 1912 states and 2817 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:22,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:22,409 INFO L93 Difference]: Finished difference Result 5460 states and 8105 transitions. [2021-11-07 01:03:22,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:03:22,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-07 01:03:22,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:22,432 INFO L225 Difference]: With dead ends: 5460 [2021-11-07 01:03:22,432 INFO L226 Difference]: Without dead ends: 3643 [2021-11-07 01:03:22,436 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:22,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3643 states. [2021-11-07 01:03:22,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3643 to 3641. [2021-11-07 01:03:22,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 3640 states have (on average 1.4733516483516484) internal successors, (5363), 3640 states have internal predecessors, (5363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:22,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 5363 transitions. [2021-11-07 01:03:22,920 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 5363 transitions. Word has length 126 [2021-11-07 01:03:22,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:22,922 INFO L470 AbstractCegarLoop]: Abstraction has 3641 states and 5363 transitions. [2021-11-07 01:03:22,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:22,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 5363 transitions. [2021-11-07 01:03:22,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 01:03:22,926 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:22,926 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:22,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:03:22,926 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:22,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:22,927 INFO L85 PathProgramCache]: Analyzing trace with hash 376216476, now seen corresponding path program 1 times [2021-11-07 01:03:22,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:22,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250814089] [2021-11-07 01:03:22,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:22,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:23,273 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:23,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250814089] [2021-11-07 01:03:23,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250814089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:23,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:23,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:03:23,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90637041] [2021-11-07 01:03:23,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:03:23,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:23,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:03:23,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:23,279 INFO L87 Difference]: Start difference. First operand 3641 states and 5363 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:23,992 INFO L93 Difference]: Finished difference Result 7063 states and 10407 transitions. [2021-11-07 01:03:23,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:03:23,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-07 01:03:23,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:24,027 INFO L225 Difference]: With dead ends: 7063 [2021-11-07 01:03:24,027 INFO L226 Difference]: Without dead ends: 5334 [2021-11-07 01:03:24,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:24,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2021-11-07 01:03:24,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 5332. [2021-11-07 01:03:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5332 states, 5331 states have (on average 1.4582629900581505) internal successors, (7774), 5331 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:24,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5332 states to 5332 states and 7774 transitions. [2021-11-07 01:03:24,667 INFO L78 Accepts]: Start accepts. Automaton has 5332 states and 7774 transitions. Word has length 131 [2021-11-07 01:03:24,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:24,667 INFO L470 AbstractCegarLoop]: Abstraction has 5332 states and 7774 transitions. [2021-11-07 01:03:24,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 5332 states and 7774 transitions. [2021-11-07 01:03:24,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 01:03:24,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:24,672 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:24,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:03:24,673 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:24,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:24,673 INFO L85 PathProgramCache]: Analyzing trace with hash 2032930890, now seen corresponding path program 1 times [2021-11-07 01:03:24,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:24,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610648999] [2021-11-07 01:03:24,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:24,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:28,798 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:28,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610648999] [2021-11-07 01:03:28,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610648999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:28,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:28,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-11-07 01:03:28,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596466768] [2021-11-07 01:03:28,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 01:03:28,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:28,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 01:03:28,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-11-07 01:03:28,801 INFO L87 Difference]: Start difference. First operand 5332 states and 7774 transitions. Second operand has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 26 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:37,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:37,103 INFO L93 Difference]: Finished difference Result 7733 states and 11129 transitions. [2021-11-07 01:03:37,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:03:37,104 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 26 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-07 01:03:37,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:37,141 INFO L225 Difference]: With dead ends: 7733 [2021-11-07 01:03:37,141 INFO L226 Difference]: Without dead ends: 6063 [2021-11-07 01:03:37,147 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=431, Invalid=1549, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 01:03:37,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-11-07 01:03:37,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 5425. [2021-11-07 01:03:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5425 states, 5424 states have (on average 1.4540929203539823) internal successors, (7887), 5424 states have internal predecessors, (7887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:37,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5425 states to 5425 states and 7887 transitions. [2021-11-07 01:03:37,750 INFO L78 Accepts]: Start accepts. Automaton has 5425 states and 7887 transitions. Word has length 131 [2021-11-07 01:03:37,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:37,750 INFO L470 AbstractCegarLoop]: Abstraction has 5425 states and 7887 transitions. [2021-11-07 01:03:37,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 26 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:37,751 INFO L276 IsEmpty]: Start isEmpty. Operand 5425 states and 7887 transitions. [2021-11-07 01:03:37,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 01:03:37,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:37,755 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:37,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:03:37,756 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:37,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:37,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1365594929, now seen corresponding path program 1 times [2021-11-07 01:03:37,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:37,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765846366] [2021-11-07 01:03:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:37,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:37,860 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:37,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765846366] [2021-11-07 01:03:37,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765846366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:37,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:37,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:03:37,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080797357] [2021-11-07 01:03:37,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:03:37,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:37,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:03:37,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:37,864 INFO L87 Difference]: Start difference. First operand 5425 states and 7887 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:38,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:38,606 INFO L93 Difference]: Finished difference Result 10417 states and 15282 transitions. [2021-11-07 01:03:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:03:38,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-07 01:03:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:38,643 INFO L225 Difference]: With dead ends: 10417 [2021-11-07 01:03:38,644 INFO L226 Difference]: Without dead ends: 7838 [2021-11-07 01:03:38,651 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:38,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7838 states. [2021-11-07 01:03:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7838 to 7836. [2021-11-07 01:03:39,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7836 states, 7835 states have (on average 1.4430121250797703) internal successors, (11306), 7835 states have internal predecessors, (11306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:39,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 11306 transitions. [2021-11-07 01:03:39,576 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 11306 transitions. Word has length 131 [2021-11-07 01:03:39,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:39,577 INFO L470 AbstractCegarLoop]: Abstraction has 7836 states and 11306 transitions. [2021-11-07 01:03:39,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:39,578 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 11306 transitions. [2021-11-07 01:03:39,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 01:03:39,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:39,584 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:39,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 01:03:39,585 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:39,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:39,586 INFO L85 PathProgramCache]: Analyzing trace with hash 155096622, now seen corresponding path program 1 times [2021-11-07 01:03:39,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:39,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984712111] [2021-11-07 01:03:39,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:39,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:39,871 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:39,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984712111] [2021-11-07 01:03:39,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984712111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:39,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:39,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:03:39,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857595091] [2021-11-07 01:03:39,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:03:39,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:39,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:03:39,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:39,873 INFO L87 Difference]: Start difference. First operand 7836 states and 11306 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:40,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:40,599 INFO L93 Difference]: Finished difference Result 10420 states and 15152 transitions. [2021-11-07 01:03:40,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:03:40,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-07 01:03:40,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:40,618 INFO L225 Difference]: With dead ends: 10420 [2021-11-07 01:03:40,618 INFO L226 Difference]: Without dead ends: 7273 [2021-11-07 01:03:40,623 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:03:40,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7273 states. [2021-11-07 01:03:41,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7273 to 7271. [2021-11-07 01:03:41,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7271 states, 7270 states have (on average 1.4444291609353508) internal successors, (10501), 7270 states have internal predecessors, (10501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:41,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7271 states to 7271 states and 10501 transitions. [2021-11-07 01:03:41,329 INFO L78 Accepts]: Start accepts. Automaton has 7271 states and 10501 transitions. Word has length 131 [2021-11-07 01:03:41,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:41,329 INFO L470 AbstractCegarLoop]: Abstraction has 7271 states and 10501 transitions. [2021-11-07 01:03:41,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:41,329 INFO L276 IsEmpty]: Start isEmpty. Operand 7271 states and 10501 transitions. [2021-11-07 01:03:41,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 01:03:41,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:41,334 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:41,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 01:03:41,335 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:41,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:41,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1698102289, now seen corresponding path program 1 times [2021-11-07 01:03:41,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:41,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084044063] [2021-11-07 01:03:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:41,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:41,414 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:41,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084044063] [2021-11-07 01:03:41,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084044063] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:41,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:41,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:03:41,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256756370] [2021-11-07 01:03:41,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:03:41,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:41,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:03:41,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:41,416 INFO L87 Difference]: Start difference. First operand 7271 states and 10501 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:42,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:42,371 INFO L93 Difference]: Finished difference Result 14439 states and 20883 transitions. [2021-11-07 01:03:42,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:03:42,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-07 01:03:42,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:42,391 INFO L225 Difference]: With dead ends: 14439 [2021-11-07 01:03:42,392 INFO L226 Difference]: Without dead ends: 7271 [2021-11-07 01:03:42,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:03:42,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7271 states. [2021-11-07 01:03:43,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7271 to 7271. [2021-11-07 01:03:43,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7271 states, 7270 states have (on average 1.427372764786795) internal successors, (10377), 7270 states have internal predecessors, (10377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:43,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7271 states to 7271 states and 10377 transitions. [2021-11-07 01:03:43,037 INFO L78 Accepts]: Start accepts. Automaton has 7271 states and 10377 transitions. Word has length 131 [2021-11-07 01:03:43,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:43,037 INFO L470 AbstractCegarLoop]: Abstraction has 7271 states and 10377 transitions. [2021-11-07 01:03:43,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:43,038 INFO L276 IsEmpty]: Start isEmpty. Operand 7271 states and 10377 transitions. [2021-11-07 01:03:43,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 01:03:43,043 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:43,043 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:43,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 01:03:43,043 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:43,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:43,044 INFO L85 PathProgramCache]: Analyzing trace with hash 985329552, now seen corresponding path program 1 times [2021-11-07 01:03:43,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:43,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672662139] [2021-11-07 01:03:43,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:43,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:43,249 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:43,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672662139] [2021-11-07 01:03:43,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672662139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:43,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:43,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:03:43,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129476209] [2021-11-07 01:03:43,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:03:43,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:43,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:03:43,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:43,251 INFO L87 Difference]: Start difference. First operand 7271 states and 10377 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:44,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:44,108 INFO L93 Difference]: Finished difference Result 12240 states and 17725 transitions. [2021-11-07 01:03:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:03:44,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-07 01:03:44,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:44,127 INFO L225 Difference]: With dead ends: 12240 [2021-11-07 01:03:44,127 INFO L226 Difference]: Without dead ends: 7665 [2021-11-07 01:03:44,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:03:44,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7665 states. [2021-11-07 01:03:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7665 to 6468. [2021-11-07 01:03:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6468 states, 6467 states have (on average 1.4284830678830989) internal successors, (9238), 6467 states have internal predecessors, (9238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6468 states to 6468 states and 9238 transitions. [2021-11-07 01:03:44,994 INFO L78 Accepts]: Start accepts. Automaton has 6468 states and 9238 transitions. Word has length 131 [2021-11-07 01:03:44,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:44,995 INFO L470 AbstractCegarLoop]: Abstraction has 6468 states and 9238 transitions. [2021-11-07 01:03:44,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:44,995 INFO L276 IsEmpty]: Start isEmpty. Operand 6468 states and 9238 transitions. [2021-11-07 01:03:45,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 01:03:45,000 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:45,001 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:45,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 01:03:45,001 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:45,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:45,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1535946816, now seen corresponding path program 1 times [2021-11-07 01:03:45,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:45,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825370447] [2021-11-07 01:03:45,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:45,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:48,453 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:48,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825370447] [2021-11-07 01:03:48,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825370447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:48,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:48,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-11-07 01:03:48,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158763142] [2021-11-07 01:03:48,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 01:03:48,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:48,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 01:03:48,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-11-07 01:03:48,456 INFO L87 Difference]: Start difference. First operand 6468 states and 9238 transitions. Second operand has 29 states, 29 states have (on average 4.517241379310345) internal successors, (131), 28 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:55,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:55,711 INFO L93 Difference]: Finished difference Result 11010 states and 15532 transitions. [2021-11-07 01:03:55,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 01:03:55,712 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.517241379310345) internal successors, (131), 28 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-07 01:03:55,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:55,728 INFO L225 Difference]: With dead ends: 11010 [2021-11-07 01:03:55,728 INFO L226 Difference]: Without dead ends: 7766 [2021-11-07 01:03:55,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=451, Invalid=1619, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 01:03:55,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7766 states. [2021-11-07 01:03:56,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7766 to 6599. [2021-11-07 01:03:56,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6599 states, 6598 states have (on average 1.4239163382843285) internal successors, (9395), 6598 states have internal predecessors, (9395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6599 states to 6599 states and 9395 transitions. [2021-11-07 01:03:56,448 INFO L78 Accepts]: Start accepts. Automaton has 6599 states and 9395 transitions. Word has length 131 [2021-11-07 01:03:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:56,448 INFO L470 AbstractCegarLoop]: Abstraction has 6599 states and 9395 transitions. [2021-11-07 01:03:56,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.517241379310345) internal successors, (131), 28 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:56,449 INFO L276 IsEmpty]: Start isEmpty. Operand 6599 states and 9395 transitions. [2021-11-07 01:03:56,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 01:03:56,454 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:56,454 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:56,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 01:03:56,455 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:56,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:56,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1928959065, now seen corresponding path program 1 times [2021-11-07 01:03:56,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:56,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957531621] [2021-11-07 01:03:56,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:56,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:56,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:56,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:56,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957531621] [2021-11-07 01:03:56,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957531621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:56,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:56,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:03:56,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555017080] [2021-11-07 01:03:56,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:03:56,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:56,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:03:56,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:56,510 INFO L87 Difference]: Start difference. First operand 6599 states and 9395 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:57,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:57,378 INFO L93 Difference]: Finished difference Result 10488 states and 14950 transitions. [2021-11-07 01:03:57,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:03:57,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-07 01:03:57,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:57,396 INFO L225 Difference]: With dead ends: 10488 [2021-11-07 01:03:57,396 INFO L226 Difference]: Without dead ends: 6623 [2021-11-07 01:03:57,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:57,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6623 states. [2021-11-07 01:03:58,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6623 to 6551. [2021-11-07 01:03:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6551 states, 6550 states have (on average 1.4195419847328243) internal successors, (9298), 6550 states have internal predecessors, (9298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:58,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6551 states to 6551 states and 9298 transitions. [2021-11-07 01:03:58,099 INFO L78 Accepts]: Start accepts. Automaton has 6551 states and 9298 transitions. Word has length 132 [2021-11-07 01:03:58,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:58,100 INFO L470 AbstractCegarLoop]: Abstraction has 6551 states and 9298 transitions. [2021-11-07 01:03:58,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:58,100 INFO L276 IsEmpty]: Start isEmpty. Operand 6551 states and 9298 transitions. [2021-11-07 01:03:58,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 01:03:58,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:58,106 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:58,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 01:03:58,107 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:58,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:58,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1644653967, now seen corresponding path program 1 times [2021-11-07 01:03:58,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:58,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578651228] [2021-11-07 01:03:58,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:58,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:58,155 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:58,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578651228] [2021-11-07 01:03:58,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578651228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:58,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:58,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:03:58,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197931673] [2021-11-07 01:03:58,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:03:58,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:58,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:03:58,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:58,157 INFO L87 Difference]: Start difference. First operand 6551 states and 9298 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:58,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:58,820 INFO L93 Difference]: Finished difference Result 11541 states and 16342 transitions. [2021-11-07 01:03:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:03:58,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-07 01:03:58,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:58,833 INFO L225 Difference]: With dead ends: 11541 [2021-11-07 01:03:58,833 INFO L226 Difference]: Without dead ends: 7160 [2021-11-07 01:03:58,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:58,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7160 states. [2021-11-07 01:03:59,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7160 to 6503. [2021-11-07 01:03:59,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6503 states, 6502 states have (on average 1.4151030452168563) internal successors, (9201), 6502 states have internal predecessors, (9201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:59,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6503 states to 6503 states and 9201 transitions. [2021-11-07 01:03:59,505 INFO L78 Accepts]: Start accepts. Automaton has 6503 states and 9201 transitions. Word has length 132 [2021-11-07 01:03:59,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:59,505 INFO L470 AbstractCegarLoop]: Abstraction has 6503 states and 9201 transitions. [2021-11-07 01:03:59,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:59,506 INFO L276 IsEmpty]: Start isEmpty. Operand 6503 states and 9201 transitions. [2021-11-07 01:03:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 01:03:59,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:59,511 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:59,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 01:03:59,511 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:59,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:59,512 INFO L85 PathProgramCache]: Analyzing trace with hash 980274033, now seen corresponding path program 1 times [2021-11-07 01:03:59,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:03:59,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924962872] [2021-11-07 01:03:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:59,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:03:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:59,553 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:03:59,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924962872] [2021-11-07 01:03:59,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924962872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:59,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:59,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:03:59,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239202899] [2021-11-07 01:03:59,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:03:59,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:03:59,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:03:59,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:03:59,556 INFO L87 Difference]: Start difference. First operand 6503 states and 9201 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:00,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:00,319 INFO L93 Difference]: Finished difference Result 11361 states and 15994 transitions. [2021-11-07 01:04:00,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:00,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-07 01:04:00,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:00,327 INFO L225 Difference]: With dead ends: 11361 [2021-11-07 01:04:00,327 INFO L226 Difference]: Without dead ends: 7388 [2021-11-07 01:04:00,331 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:00,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7388 states. [2021-11-07 01:04:00,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7388 to 6445. [2021-11-07 01:04:00,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6445 states, 6444 states have (on average 1.4115456238361266) internal successors, (9096), 6444 states have internal predecessors, (9096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:00,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6445 states to 6445 states and 9096 transitions. [2021-11-07 01:04:00,863 INFO L78 Accepts]: Start accepts. Automaton has 6445 states and 9096 transitions. Word has length 132 [2021-11-07 01:04:00,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:00,863 INFO L470 AbstractCegarLoop]: Abstraction has 6445 states and 9096 transitions. [2021-11-07 01:04:00,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:00,863 INFO L276 IsEmpty]: Start isEmpty. Operand 6445 states and 9096 transitions. [2021-11-07 01:04:00,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 01:04:00,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:00,868 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:00,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 01:04:00,869 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:04:00,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:00,869 INFO L85 PathProgramCache]: Analyzing trace with hash 522978550, now seen corresponding path program 1 times [2021-11-07 01:04:00,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:00,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223810951] [2021-11-07 01:04:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:00,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:00,915 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:00,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223810951] [2021-11-07 01:04:00,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223810951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:00,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:00,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:04:00,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857674773] [2021-11-07 01:04:00,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:00,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:00,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:00,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:00,918 INFO L87 Difference]: Start difference. First operand 6445 states and 9096 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:01,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:01,850 INFO L93 Difference]: Finished difference Result 14178 states and 19893 transitions. [2021-11-07 01:04:01,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:01,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-07 01:04:01,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:01,858 INFO L225 Difference]: With dead ends: 14178 [2021-11-07 01:04:01,858 INFO L226 Difference]: Without dead ends: 8029 [2021-11-07 01:04:01,864 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:01,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8029 states. [2021-11-07 01:04:02,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 6369. [2021-11-07 01:04:02,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6369 states, 6368 states have (on average 1.4056218592964824) internal successors, (8951), 6368 states have internal predecessors, (8951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:02,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6369 states to 6369 states and 8951 transitions. [2021-11-07 01:04:02,416 INFO L78 Accepts]: Start accepts. Automaton has 6369 states and 8951 transitions. Word has length 132 [2021-11-07 01:04:02,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:02,416 INFO L470 AbstractCegarLoop]: Abstraction has 6369 states and 8951 transitions. [2021-11-07 01:04:02,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:02,417 INFO L276 IsEmpty]: Start isEmpty. Operand 6369 states and 8951 transitions. [2021-11-07 01:04:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 01:04:02,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:02,421 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:02,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 01:04:02,422 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:04:02,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:02,422 INFO L85 PathProgramCache]: Analyzing trace with hash 713413560, now seen corresponding path program 1 times [2021-11-07 01:04:02,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:02,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992859726] [2021-11-07 01:04:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:02,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:02,466 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:02,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992859726] [2021-11-07 01:04:02,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992859726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:02,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:02,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:04:02,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427967829] [2021-11-07 01:04:02,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:02,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:02,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:02,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:02,468 INFO L87 Difference]: Start difference. First operand 6369 states and 8951 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:03,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:03,266 INFO L93 Difference]: Finished difference Result 11662 states and 16386 transitions. [2021-11-07 01:04:03,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:03,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-07 01:04:03,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:03,274 INFO L225 Difference]: With dead ends: 11662 [2021-11-07 01:04:03,274 INFO L226 Difference]: Without dead ends: 6934 [2021-11-07 01:04:03,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:03,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6934 states. [2021-11-07 01:04:03,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6934 to 6301. [2021-11-07 01:04:03,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6301 states, 6300 states have (on average 1.4003174603174604) internal successors, (8822), 6300 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:03,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6301 states to 6301 states and 8822 transitions. [2021-11-07 01:04:03,874 INFO L78 Accepts]: Start accepts. Automaton has 6301 states and 8822 transitions. Word has length 132 [2021-11-07 01:04:03,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:03,874 INFO L470 AbstractCegarLoop]: Abstraction has 6301 states and 8822 transitions. [2021-11-07 01:04:03,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:03,875 INFO L276 IsEmpty]: Start isEmpty. Operand 6301 states and 8822 transitions. [2021-11-07 01:04:03,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 01:04:03,879 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:03,879 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:03,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 01:04:03,879 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:04:03,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:03,880 INFO L85 PathProgramCache]: Analyzing trace with hash 228857818, now seen corresponding path program 1 times [2021-11-07 01:04:03,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:03,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486608112] [2021-11-07 01:04:03,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:03,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:03,937 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:03,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486608112] [2021-11-07 01:04:03,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486608112] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:03,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:03,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:04:03,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794583851] [2021-11-07 01:04:03,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:03,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:03,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:03,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:03,940 INFO L87 Difference]: Start difference. First operand 6301 states and 8822 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:04,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:04,602 INFO L93 Difference]: Finished difference Result 10977 states and 15409 transitions. [2021-11-07 01:04:04,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:04,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-07 01:04:04,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:04,610 INFO L225 Difference]: With dead ends: 10977 [2021-11-07 01:04:04,610 INFO L226 Difference]: Without dead ends: 6370 [2021-11-07 01:04:04,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:04,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6370 states. [2021-11-07 01:04:05,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6370 to 6205. [2021-11-07 01:04:05,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6205 states, 6204 states have (on average 1.3965183752417796) internal successors, (8664), 6204 states have internal predecessors, (8664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6205 states to 6205 states and 8664 transitions. [2021-11-07 01:04:05,149 INFO L78 Accepts]: Start accepts. Automaton has 6205 states and 8664 transitions. Word has length 132 [2021-11-07 01:04:05,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:05,149 INFO L470 AbstractCegarLoop]: Abstraction has 6205 states and 8664 transitions. [2021-11-07 01:04:05,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:05,149 INFO L276 IsEmpty]: Start isEmpty. Operand 6205 states and 8664 transitions. [2021-11-07 01:04:05,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 01:04:05,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:05,153 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:05,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 01:04:05,154 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:04:05,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:05,155 INFO L85 PathProgramCache]: Analyzing trace with hash 190276819, now seen corresponding path program 1 times [2021-11-07 01:04:05,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:05,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100273135] [2021-11-07 01:04:05,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:05,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:10,456 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:10,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100273135] [2021-11-07 01:04:10,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100273135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:10,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:10,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-11-07 01:04:10,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923566664] [2021-11-07 01:04:10,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 01:04:10,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:10,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 01:04:10,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 01:04:10,460 INFO L87 Difference]: Start difference. First operand 6205 states and 8664 transitions. Second operand has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:25,663 INFO L93 Difference]: Finished difference Result 16740 states and 23836 transitions. [2021-11-07 01:04:25,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-07 01:04:25,665 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-07 01:04:25,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:25,689 INFO L225 Difference]: With dead ends: 16740 [2021-11-07 01:04:25,689 INFO L226 Difference]: Without dead ends: 15069 [2021-11-07 01:04:25,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1799 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1033, Invalid=6449, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 01:04:25,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15069 states. [2021-11-07 01:04:27,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15069 to 12981. [2021-11-07 01:04:27,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12981 states, 12980 states have (on average 1.4339753466872112) internal successors, (18613), 12980 states have internal predecessors, (18613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:27,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12981 states to 12981 states and 18613 transitions. [2021-11-07 01:04:27,593 INFO L78 Accepts]: Start accepts. Automaton has 12981 states and 18613 transitions. Word has length 134 [2021-11-07 01:04:27,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:27,593 INFO L470 AbstractCegarLoop]: Abstraction has 12981 states and 18613 transitions. [2021-11-07 01:04:27,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:27,594 INFO L276 IsEmpty]: Start isEmpty. Operand 12981 states and 18613 transitions. [2021-11-07 01:04:27,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 01:04:27,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:27,597 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:27,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 01:04:27,597 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:04:27,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:27,598 INFO L85 PathProgramCache]: Analyzing trace with hash -664181913, now seen corresponding path program 1 times [2021-11-07 01:04:27,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:27,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449803435] [2021-11-07 01:04:27,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:27,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:33,917 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:33,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449803435] [2021-11-07 01:04:33,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449803435] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:33,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:33,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-11-07 01:04:33,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150127173] [2021-11-07 01:04:33,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 01:04:33,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:33,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 01:04:33,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1311, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 01:04:33,920 INFO L87 Difference]: Start difference. First operand 12981 states and 18613 transitions. Second operand has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 38 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:50,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:50,496 INFO L93 Difference]: Finished difference Result 34061 states and 49659 transitions. [2021-11-07 01:04:50,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-07 01:04:50,497 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 38 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-07 01:04:50,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:50,532 INFO L225 Difference]: With dead ends: 34061 [2021-11-07 01:04:50,532 INFO L226 Difference]: Without dead ends: 26643 [2021-11-07 01:04:50,543 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=808, Invalid=4304, Unknown=0, NotChecked=0, Total=5112 [2021-11-07 01:04:50,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26643 states. [2021-11-07 01:04:53,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26643 to 20545. [2021-11-07 01:04:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20545 states, 20544 states have (on average 1.4446066978193146) internal successors, (29678), 20544 states have internal predecessors, (29678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:53,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20545 states to 20545 states and 29678 transitions. [2021-11-07 01:04:53,990 INFO L78 Accepts]: Start accepts. Automaton has 20545 states and 29678 transitions. Word has length 134 [2021-11-07 01:04:53,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:53,990 INFO L470 AbstractCegarLoop]: Abstraction has 20545 states and 29678 transitions. [2021-11-07 01:04:53,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 38 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 20545 states and 29678 transitions. [2021-11-07 01:04:53,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 01:04:53,994 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:53,994 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:53,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 01:04:53,995 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:04:53,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:53,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1187251943, now seen corresponding path program 1 times [2021-11-07 01:04:53,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:04:53,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380244091] [2021-11-07 01:04:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:53,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:04:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:59,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:59,307 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:04:59,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380244091] [2021-11-07 01:04:59,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380244091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:59,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:59,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-11-07 01:04:59,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583208279] [2021-11-07 01:04:59,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 01:04:59,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:04:59,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 01:04:59,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1425, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 01:04:59,309 INFO L87 Difference]: Start difference. First operand 20545 states and 29678 transitions. Second operand has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:25,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:25,356 INFO L93 Difference]: Finished difference Result 91096 states and 131242 transitions. [2021-11-07 01:06:25,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2021-11-07 01:06:25,356 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-07 01:06:25,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:25,503 INFO L225 Difference]: With dead ends: 91096 [2021-11-07 01:06:25,503 INFO L226 Difference]: Without dead ends: 86799 [2021-11-07 01:06:25,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14000 ImplicationChecksByTransitivity, 54.2s TimeCoverageRelationStatistics Valid=5219, Invalid=32611, Unknown=0, NotChecked=0, Total=37830 [2021-11-07 01:06:25,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86799 states. [2021-11-07 01:06:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86799 to 31662. [2021-11-07 01:06:32,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31662 states, 31661 states have (on average 1.4636303338492151) internal successors, (46340), 31661 states have internal predecessors, (46340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31662 states to 31662 states and 46340 transitions. [2021-11-07 01:06:32,636 INFO L78 Accepts]: Start accepts. Automaton has 31662 states and 46340 transitions. Word has length 134 [2021-11-07 01:06:32,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:32,637 INFO L470 AbstractCegarLoop]: Abstraction has 31662 states and 46340 transitions. [2021-11-07 01:06:32,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:32,637 INFO L276 IsEmpty]: Start isEmpty. Operand 31662 states and 46340 transitions. [2021-11-07 01:06:32,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 01:06:32,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:32,640 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:32,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-07 01:06:32,640 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:32,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:32,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1080483705, now seen corresponding path program 1 times [2021-11-07 01:06:32,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:06:32,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590069518] [2021-11-07 01:06:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:32,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:06:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:38,746 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:06:38,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590069518] [2021-11-07 01:06:38,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590069518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:38,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:38,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-11-07 01:06:38,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864244551] [2021-11-07 01:06:38,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 01:06:38,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:06:38,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 01:06:38,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 01:06:38,749 INFO L87 Difference]: Start difference. First operand 31662 states and 46340 transitions. Second operand has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 38 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:54,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:54,876 INFO L93 Difference]: Finished difference Result 43536 states and 63717 transitions. [2021-11-07 01:06:54,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-07 01:06:54,877 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 38 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-07 01:06:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:54,927 INFO L225 Difference]: With dead ends: 43536 [2021-11-07 01:06:54,927 INFO L226 Difference]: Without dead ends: 37659 [2021-11-07 01:06:54,937 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=597, Invalid=3825, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 01:06:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37659 states. [2021-11-07 01:07:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37659 to 34678. [2021-11-07 01:07:01,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34678 states, 34677 states have (on average 1.4620930299622228) internal successors, (50701), 34677 states have internal predecessors, (50701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:01,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34678 states to 34678 states and 50701 transitions. [2021-11-07 01:07:01,767 INFO L78 Accepts]: Start accepts. Automaton has 34678 states and 50701 transitions. Word has length 134 [2021-11-07 01:07:01,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:07:01,767 INFO L470 AbstractCegarLoop]: Abstraction has 34678 states and 50701 transitions. [2021-11-07 01:07:01,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 38 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:01,768 INFO L276 IsEmpty]: Start isEmpty. Operand 34678 states and 50701 transitions. [2021-11-07 01:07:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 01:07:01,770 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:07:01,770 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:07:01,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-07 01:07:01,771 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:07:01,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:07:01,771 INFO L85 PathProgramCache]: Analyzing trace with hash -689081663, now seen corresponding path program 1 times [2021-11-07 01:07:01,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:07:01,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853883385] [2021-11-07 01:07:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:07:01,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:07:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:07:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:07:07,963 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:07:07,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853883385] [2021-11-07 01:07:07,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853883385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:07:07,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:07:07,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-11-07 01:07:07,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884005588] [2021-11-07 01:07:07,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 01:07:07,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:07:07,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 01:07:07,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 01:07:07,965 INFO L87 Difference]: Start difference. First operand 34678 states and 50701 transitions. Second operand has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:30,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:07:30,578 INFO L93 Difference]: Finished difference Result 65621 states and 96346 transitions. [2021-11-07 01:07:30,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 01:07:30,578 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-07 01:07:30,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:07:30,682 INFO L225 Difference]: With dead ends: 65621 [2021-11-07 01:07:30,682 INFO L226 Difference]: Without dead ends: 58297 [2021-11-07 01:07:30,700 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=707, Invalid=4405, Unknown=0, NotChecked=0, Total=5112 [2021-11-07 01:07:30,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58297 states. [2021-11-07 01:07:37,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58297 to 34611. [2021-11-07 01:07:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34611 states, 34610 states have (on average 1.4625541750939035) internal successors, (50619), 34610 states have internal predecessors, (50619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:37,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34611 states to 34611 states and 50619 transitions. [2021-11-07 01:07:37,712 INFO L78 Accepts]: Start accepts. Automaton has 34611 states and 50619 transitions. Word has length 134 [2021-11-07 01:07:37,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:07:37,713 INFO L470 AbstractCegarLoop]: Abstraction has 34611 states and 50619 transitions. [2021-11-07 01:07:37,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:37,713 INFO L276 IsEmpty]: Start isEmpty. Operand 34611 states and 50619 transitions. [2021-11-07 01:07:37,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 01:07:37,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:07:37,716 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:07:37,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-07 01:07:37,716 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:07:37,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:07:37,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1860384615, now seen corresponding path program 1 times [2021-11-07 01:07:37,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:07:37,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017406192] [2021-11-07 01:07:37,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:07:37,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:07:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:07:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:07:44,051 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:07:44,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017406192] [2021-11-07 01:07:44,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017406192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:07:44,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:07:44,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-11-07 01:07:44,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064529303] [2021-11-07 01:07:44,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 01:07:44,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:07:44,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 01:07:44,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1443, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 01:07:44,054 INFO L87 Difference]: Start difference. First operand 34611 states and 50619 transitions. Second operand has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:11,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:11,087 INFO L93 Difference]: Finished difference Result 63672 states and 93564 transitions. [2021-11-07 01:08:11,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 01:08:11,087 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-07 01:08:11,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:11,175 INFO L225 Difference]: With dead ends: 63672 [2021-11-07 01:08:11,175 INFO L226 Difference]: Without dead ends: 58004 [2021-11-07 01:08:11,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=854, Invalid=5626, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 01:08:11,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58004 states. [2021-11-07 01:08:18,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58004 to 34616. [2021-11-07 01:08:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34616 states, 34615 states have (on average 1.4625162501805575) internal successors, (50625), 34615 states have internal predecessors, (50625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34616 states to 34616 states and 50625 transitions. [2021-11-07 01:08:18,549 INFO L78 Accepts]: Start accepts. Automaton has 34616 states and 50625 transitions. Word has length 134 [2021-11-07 01:08:18,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:18,549 INFO L470 AbstractCegarLoop]: Abstraction has 34616 states and 50625 transitions. [2021-11-07 01:08:18,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:18,550 INFO L276 IsEmpty]: Start isEmpty. Operand 34616 states and 50625 transitions. [2021-11-07 01:08:18,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-07 01:08:18,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:18,553 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:18,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-07 01:08:18,553 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:08:18,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:18,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1664892636, now seen corresponding path program 1 times [2021-11-07 01:08:18,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:08:18,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056180399] [2021-11-07 01:08:18,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:18,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:08:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:18,625 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:08:18,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056180399] [2021-11-07 01:08:18,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056180399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:18,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:18,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:08:18,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491888489] [2021-11-07 01:08:18,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:08:18,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:08:18,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:08:18,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:08:18,628 INFO L87 Difference]: Start difference. First operand 34616 states and 50625 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:29,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:29,460 INFO L93 Difference]: Finished difference Result 67801 states and 99779 transitions. [2021-11-07 01:08:29,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:08:29,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-11-07 01:08:29,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:29,543 INFO L225 Difference]: With dead ends: 67801 [2021-11-07 01:08:29,543 INFO L226 Difference]: Without dead ends: 50388 [2021-11-07 01:08:29,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:08:29,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50388 states.