./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d8bec5-e08c-45b8-b4fd-9277d0c2e62a/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d8bec5-e08c-45b8-b4fd-9277d0c2e62a/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d8bec5-e08c-45b8-b4fd-9277d0c2e62a/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d8bec5-e08c-45b8-b4fd-9277d0c2e62a/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d8bec5-e08c-45b8-b4fd-9277d0c2e62a/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d8bec5-e08c-45b8-b4fd-9277d0c2e62a/bin/utaipan-UbGMyvGFUs --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 092c59f631803cbf8694b6f07f6aba3175ec20d704f5bb054fccb1ef660cfdf9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:43:11,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:43:11,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:43:11,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:43:11,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:43:11,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:43:11,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:43:11,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:43:11,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:43:11,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:43:11,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:43:11,743 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:43:11,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:43:11,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:43:11,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:43:11,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:43:11,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:43:11,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:43:11,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:43:11,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:43:11,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:43:11,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:43:11,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:43:11,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:43:11,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:43:11,766 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:43:11,767 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:43:11,768 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:43:11,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:43:11,770 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:43:11,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:43:11,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:43:11,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:43:11,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:43:11,775 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:43:11,775 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:43:11,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:43:11,777 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:43:11,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:43:11,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:43:11,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:43:11,782 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d8bec5-e08c-45b8-b4fd-9277d0c2e62a/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:43:11,835 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:43:11,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:43:11,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:43:11,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:43:11,838 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:43:11,839 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:43:11,839 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:43:11,839 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:43:11,846 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:43:11,846 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:43:11,848 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:43:11,848 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:43:11,848 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:43:11,848 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:43:11,849 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:43:11,849 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:43:11,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:43:11,850 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:43:11,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:43:11,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:43:11,851 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:43:11,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:43:11,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:43:11,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:43:11,851 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:43:11,852 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:43:11,852 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:43:11,852 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:43:11,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:43:11,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:43:11,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:43:11,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:43:11,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:43:11,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:43:11,854 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:43:11,854 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:43:11,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:43:11,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:43:11,855 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:43:11,855 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:43:11,855 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_f8d8bec5-e08c-45b8-b4fd-9277d0c2e62a/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d8bec5-e08c-45b8-b4fd-9277d0c2e62a/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 092c59f631803cbf8694b6f07f6aba3175ec20d704f5bb054fccb1ef660cfdf9 [2021-11-19 15:43:12,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:43:12,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:43:12,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:43:12,184 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:43:12,185 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:43:12,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d8bec5-e08c-45b8-b4fd-9277d0c2e62a/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-19 15:43:12,273 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d8bec5-e08c-45b8-b4fd-9277d0c2e62a/bin/utaipan-UbGMyvGFUs/data/7c660121e/3f2570414fb342278b2545caeb4cfc19/FLAGbbd8a9b14 [2021-11-19 15:43:13,213 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:43:13,215 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d8bec5-e08c-45b8-b4fd-9277d0c2e62a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-19 15:43:13,254 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d8bec5-e08c-45b8-b4fd-9277d0c2e62a/bin/utaipan-UbGMyvGFUs/data/7c660121e/3f2570414fb342278b2545caeb4cfc19/FLAGbbd8a9b14 [2021-11-19 15:43:13,292 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d8bec5-e08c-45b8-b4fd-9277d0c2e62a/bin/utaipan-UbGMyvGFUs/data/7c660121e/3f2570414fb342278b2545caeb4cfc19 [2021-11-19 15:43:13,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:43:13,298 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:43:13,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:43:13,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:43:13,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:43:13,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:43:13" (1/1) ... [2021-11-19 15:43:13,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1124c538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:13, skipping insertion in model container [2021-11-19 15:43:13,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:43:13" (1/1) ... [2021-11-19 15:43:13,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:43:13,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:43:14,301 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d8bec5-e08c-45b8-b4fd-9277d0c2e62a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[40039,40052] [2021-11-19 15:43:14,810 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:43:14,828 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:43:15,465 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d8bec5-e08c-45b8-b4fd-9277d0c2e62a/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[40039,40052] [2021-11-19 15:43:15,849 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:43:15,885 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:43:15,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:15 WrapperNode [2021-11-19 15:43:15,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:43:15,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:43:15,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:43:15,889 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:43:15,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:15" (1/1) ... [2021-11-19 15:43:15,962 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:15" (1/1) ... [2021-11-19 15:43:16,114 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 5293 [2021-11-19 15:43:16,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:43:16,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:43:16,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:43:16,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:43:16,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:15" (1/1) ... [2021-11-19 15:43:16,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:15" (1/1) ... [2021-11-19 15:43:16,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:15" (1/1) ... [2021-11-19 15:43:16,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:15" (1/1) ... [2021-11-19 15:43:16,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:15" (1/1) ... [2021-11-19 15:43:16,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:15" (1/1) ... [2021-11-19 15:43:16,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:15" (1/1) ... [2021-11-19 15:43:16,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:43:16,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:43:16,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:43:16,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:43:16,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:15" (1/1) ... [2021-11-19 15:43:16,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:43:16,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d8bec5-e08c-45b8-b4fd-9277d0c2e62a/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:43:16,312 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d8bec5-e08c-45b8-b4fd-9277d0c2e62a/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:43:16,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d8bec5-e08c-45b8-b4fd-9277d0c2e62a/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:43:16,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:43:16,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 15:43:16,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:43:16,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:43:16,749 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:43:16,751 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:43:20,452 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:43:22,436 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:43:22,437 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 15:43:22,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:43:22 BoogieIcfgContainer [2021-11-19 15:43:22,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:43:22,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:43:22,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:43:22,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:43:22,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:43:13" (1/3) ... [2021-11-19 15:43:22,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55def030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:43:22, skipping insertion in model container [2021-11-19 15:43:22,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:43:15" (2/3) ... [2021-11-19 15:43:22,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55def030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:43:22, skipping insertion in model container [2021-11-19 15:43:22,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:43:22" (3/3) ... [2021-11-19 15:43:22,456 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-19 15:43:22,462 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:43:22,463 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:43:22,544 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:43:22,551 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 [2021-11-19 15:43:22,551 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:43:22,600 INFO L276 IsEmpty]: Start isEmpty. Operand has 1238 states, 1236 states have (on average 1.7046925566343043) internal successors, (2107), 1237 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:43:22,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-19 15:43:22,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:22,659 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:22,660 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:22,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:22,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1394680690, now seen corresponding path program 1 times [2021-11-19 15:43:22,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:43:22,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363159594] [2021-11-19 15:43:22,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:22,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:43:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:43:23,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:43:23,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363159594] [2021-11-19 15:43:23,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363159594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:43:23,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:43:23,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 15:43:23,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919425085] [2021-11-19 15:43:23,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:23,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:43:23,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:43:23,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:43:23,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:43:23,618 INFO L87 Difference]: Start difference. First operand has 1238 states, 1236 states have (on average 1.7046925566343043) internal successors, (2107), 1237 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:43:24,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:24,259 INFO L93 Difference]: Finished difference Result 2444 states and 4118 transitions. [2021-11-19 15:43:24,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:43:24,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 290 [2021-11-19 15:43:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:24,294 INFO L225 Difference]: With dead ends: 2444 [2021-11-19 15:43:24,294 INFO L226 Difference]: Without dead ends: 1717 [2021-11-19 15:43:24,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:43:24,307 INFO L933 BasicCegarLoop]: 2367 mSDtfsCounter, 1023 mSDsluCounter, 1852 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 4138 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:24,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1023 Valid, 4138 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:43:24,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2021-11-19 15:43:24,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1715. [2021-11-19 15:43:24,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1714 states have (on average 1.5816802800466745) internal successors, (2711), 1714 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:43:24,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 2711 transitions. [2021-11-19 15:43:24,479 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 2711 transitions. Word has length 290 [2021-11-19 15:43:24,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:24,482 INFO L470 AbstractCegarLoop]: Abstraction has 1715 states and 2711 transitions. [2021-11-19 15:43:24,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:43:24,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 2711 transitions. [2021-11-19 15:43:24,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-11-19 15:43:24,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:24,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:24,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 15:43:24,497 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:24,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:24,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1503421312, now seen corresponding path program 1 times [2021-11-19 15:43:24,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:43:24,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677169093] [2021-11-19 15:43:24,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:24,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:43:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:43:24,852 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:43:24,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677169093] [2021-11-19 15:43:24,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677169093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:43:24,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:43:24,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 15:43:24,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815148772] [2021-11-19 15:43:24,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:24,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:43:24,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:43:24,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:43:24,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:43:24,858 INFO L87 Difference]: Start difference. First operand 1715 states and 2711 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:43:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:25,457 INFO L93 Difference]: Finished difference Result 3711 states and 5833 transitions. [2021-11-19 15:43:25,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:43:25,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 300 [2021-11-19 15:43:25,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:25,481 INFO L225 Difference]: With dead ends: 3711 [2021-11-19 15:43:25,481 INFO L226 Difference]: Without dead ends: 2539 [2021-11-19 15:43:25,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:43:25,492 INFO L933 BasicCegarLoop]: 1960 mSDtfsCounter, 950 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 3560 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:25,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [950 Valid, 3560 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:43:25,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-11-19 15:43:25,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 2537. [2021-11-19 15:43:25,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2536 states have (on average 1.5733438485804416) internal successors, (3990), 2536 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:43:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 3990 transitions. [2021-11-19 15:43:25,633 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 3990 transitions. Word has length 300 [2021-11-19 15:43:25,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:25,634 INFO L470 AbstractCegarLoop]: Abstraction has 2537 states and 3990 transitions. [2021-11-19 15:43:25,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:43:25,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 3990 transitions. [2021-11-19 15:43:25,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-11-19 15:43:25,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:25,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:25,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 15:43:25,647 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:25,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:25,648 INFO L85 PathProgramCache]: Analyzing trace with hash -972008790, now seen corresponding path program 1 times [2021-11-19 15:43:25,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:43:25,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339504642] [2021-11-19 15:43:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:25,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:43:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:43:25,853 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:43:25,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339504642] [2021-11-19 15:43:25,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339504642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:43:25,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:43:25,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 15:43:25,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369689064] [2021-11-19 15:43:25,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:25,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:43:25,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:43:25,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:43:25,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:43:25,857 INFO L87 Difference]: Start difference. First operand 2537 states and 3990 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:43:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:26,527 INFO L93 Difference]: Finished difference Result 5876 states and 9188 transitions. [2021-11-19 15:43:26,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:43:26,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 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 310 [2021-11-19 15:43:26,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:26,557 INFO L225 Difference]: With dead ends: 5876 [2021-11-19 15:43:26,557 INFO L226 Difference]: Without dead ends: 3910 [2021-11-19 15:43:26,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:43:26,572 INFO L933 BasicCegarLoop]: 1914 mSDtfsCounter, 940 mSDsluCounter, 1634 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 3470 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:26,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 3470 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 15:43:26,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3910 states. [2021-11-19 15:43:26,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3910 to 3908. [2021-11-19 15:43:26,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 3907 states have (on average 1.562324033785513) internal successors, (6104), 3907 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:43:26,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 6104 transitions. [2021-11-19 15:43:26,848 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 6104 transitions. Word has length 310 [2021-11-19 15:43:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:26,851 INFO L470 AbstractCegarLoop]: Abstraction has 3908 states and 6104 transitions. [2021-11-19 15:43:26,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:43:26,852 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 6104 transitions. [2021-11-19 15:43:26,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-19 15:43:26,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:26,868 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:26,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 15:43:26,869 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:26,870 INFO L85 PathProgramCache]: Analyzing trace with hash -2060460919, now seen corresponding path program 1 times [2021-11-19 15:43:26,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:43:26,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247918686] [2021-11-19 15:43:26,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:26,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:43:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:43:27,146 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:43:27,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247918686] [2021-11-19 15:43:27,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247918686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:43:27,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:43:27,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 15:43:27,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446915437] [2021-11-19 15:43:27,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:27,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:43:27,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:43:27,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:43:27,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:43:27,151 INFO L87 Difference]: Start difference. First operand 3908 states and 6104 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:43:27,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:27,950 INFO L93 Difference]: Finished difference Result 9414 states and 14608 transitions. [2021-11-19 15:43:27,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:43:27,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 320 [2021-11-19 15:43:27,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:27,997 INFO L225 Difference]: With dead ends: 9414 [2021-11-19 15:43:27,998 INFO L226 Difference]: Without dead ends: 6105 [2021-11-19 15:43:28,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:43:28,016 INFO L933 BasicCegarLoop]: 2061 mSDtfsCounter, 929 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 3573 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:28,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [929 Valid, 3573 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 15:43:28,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6105 states. [2021-11-19 15:43:28,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6105 to 6103. [2021-11-19 15:43:28,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 1.5473615208128482) internal successors, (9442), 6102 states have internal predecessors, (9442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:43:28,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 9442 transitions. [2021-11-19 15:43:28,517 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 9442 transitions. Word has length 320 [2021-11-19 15:43:28,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:28,518 INFO L470 AbstractCegarLoop]: Abstraction has 6103 states and 9442 transitions. [2021-11-19 15:43:28,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:43:28,519 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 9442 transitions. [2021-11-19 15:43:28,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-11-19 15:43:28,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:28,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:28,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 15:43:28,537 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:28,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:28,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1371886643, now seen corresponding path program 1 times [2021-11-19 15:43:28,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:43:28,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321080865] [2021-11-19 15:43:28,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:28,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:43:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:43:28,756 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:43:28,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321080865] [2021-11-19 15:43:28,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321080865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:43:28,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:43:28,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 15:43:28,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752130811] [2021-11-19 15:43:28,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:28,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:43:28,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:43:28,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:43:28,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:43:28,761 INFO L87 Difference]: Start difference. First operand 6103 states and 9442 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:43:29,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:29,579 INFO L93 Difference]: Finished difference Result 15292 states and 23492 transitions. [2021-11-19 15:43:29,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:43:29,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 330 [2021-11-19 15:43:29,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:29,676 INFO L225 Difference]: With dead ends: 15292 [2021-11-19 15:43:29,677 INFO L226 Difference]: Without dead ends: 9816 [2021-11-19 15:43:29,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:43:29,693 INFO L933 BasicCegarLoop]: 2060 mSDtfsCounter, 921 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 3571 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:29,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [921 Valid, 3571 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 15:43:29,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9816 states. [2021-11-19 15:43:30,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9816 to 9814. [2021-11-19 15:43:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9814 states, 9813 states have (on average 1.5310302659737083) internal successors, (15024), 9813 states have internal predecessors, (15024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:43:30,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9814 states to 9814 states and 15024 transitions. [2021-11-19 15:43:30,471 INFO L78 Accepts]: Start accepts. Automaton has 9814 states and 15024 transitions. Word has length 330 [2021-11-19 15:43:30,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:43:30,472 INFO L470 AbstractCegarLoop]: Abstraction has 9814 states and 15024 transitions. [2021-11-19 15:43:30,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:43:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 9814 states and 15024 transitions. [2021-11-19 15:43:30,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-11-19 15:43:30,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:43:30,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:43:30,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 15:43:30,509 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:43:30,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:43:30,510 INFO L85 PathProgramCache]: Analyzing trace with hash -146518259, now seen corresponding path program 1 times [2021-11-19 15:43:30,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:43:30,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438457924] [2021-11-19 15:43:30,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:43:30,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:43:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:43:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:43:35,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:43:35,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438457924] [2021-11-19 15:43:35,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438457924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:43:35,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:43:35,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-19 15:43:35,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841251854] [2021-11-19 15:43:35,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:43:35,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 15:43:35,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:43:35,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 15:43:35,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2021-11-19 15:43:35,517 INFO L87 Difference]: Start difference. First operand 9814 states and 15024 transitions. Second operand has 24 states, 24 states have (on average 14.166666666666666) internal successors, (340), 24 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:43:57,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:43:57,705 INFO L93 Difference]: Finished difference Result 56884 states and 88517 transitions. [2021-11-19 15:43:57,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 15:43:57,707 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 14.166666666666666) internal successors, (340), 24 states have internal predecessors, (340), 0 states have call successors, (0), 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 340 [2021-11-19 15:43:57,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:43:57,878 INFO L225 Difference]: With dead ends: 56884 [2021-11-19 15:43:57,878 INFO L226 Difference]: Without dead ends: 47843 [2021-11-19 15:43:57,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=678, Invalid=1578, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 15:43:57,909 INFO L933 BasicCegarLoop]: 9455 mSDtfsCounter, 31573 mSDsluCounter, 69921 mSDsCounter, 0 mSdLazyCounter, 11326 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31573 SdHoareTripleChecker+Valid, 79047 SdHoareTripleChecker+Invalid, 11607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 11326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:43:57,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31573 Valid, 79047 Invalid, 11607 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [281 Valid, 11326 Invalid, 0 Unknown, 0 Unchecked, 14.8s Time] [2021-11-19 15:43:57,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47843 states. [2021-11-19 15:44:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47843 to 46965. [2021-11-19 15:44:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46965 states, 46964 states have (on average 1.545928796524998) internal successors, (72603), 46964 states have internal predecessors, (72603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:02,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46965 states to 46965 states and 72603 transitions. [2021-11-19 15:44:02,319 INFO L78 Accepts]: Start accepts. Automaton has 46965 states and 72603 transitions. Word has length 340 [2021-11-19 15:44:02,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:02,321 INFO L470 AbstractCegarLoop]: Abstraction has 46965 states and 72603 transitions. [2021-11-19 15:44:02,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.166666666666666) internal successors, (340), 24 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:02,321 INFO L276 IsEmpty]: Start isEmpty. Operand 46965 states and 72603 transitions. [2021-11-19 15:44:02,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-11-19 15:44:02,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:02,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:02,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 15:44:02,405 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:44:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:02,406 INFO L85 PathProgramCache]: Analyzing trace with hash -190723030, now seen corresponding path program 1 times [2021-11-19 15:44:02,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:44:02,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480699948] [2021-11-19 15:44:02,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:02,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:44:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:44:02,583 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:44:02,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480699948] [2021-11-19 15:44:02,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480699948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:02,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:02,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 15:44:02,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826938013] [2021-11-19 15:44:02,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:02,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:44:02,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:44:02,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:44:02,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:44:02,587 INFO L87 Difference]: Start difference. First operand 46965 states and 72603 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:07,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:07,412 INFO L93 Difference]: Finished difference Result 117808 states and 182786 transitions. [2021-11-19 15:44:07,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:44:07,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 341 [2021-11-19 15:44:07,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:07,662 INFO L225 Difference]: With dead ends: 117808 [2021-11-19 15:44:07,663 INFO L226 Difference]: Without dead ends: 71373 [2021-11-19 15:44:07,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:44:07,741 INFO L933 BasicCegarLoop]: 2577 mSDtfsCounter, 1114 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 4023 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:07,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 4023 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 15:44:07,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71373 states. [2021-11-19 15:44:12,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71373 to 71371. [2021-11-19 15:44:12,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71371 states, 71370 states have (on average 1.5432114333753677) internal successors, (110139), 71370 states have internal predecessors, (110139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:13,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71371 states to 71371 states and 110139 transitions. [2021-11-19 15:44:13,130 INFO L78 Accepts]: Start accepts. Automaton has 71371 states and 110139 transitions. Word has length 341 [2021-11-19 15:44:13,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:13,131 INFO L470 AbstractCegarLoop]: Abstraction has 71371 states and 110139 transitions. [2021-11-19 15:44:13,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 71371 states and 110139 transitions. [2021-11-19 15:44:13,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-11-19 15:44:13,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:13,244 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:13,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 15:44:13,245 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:44:13,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:13,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1418332140, now seen corresponding path program 1 times [2021-11-19 15:44:13,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:44:13,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752362660] [2021-11-19 15:44:13,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:13,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:44:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:44:13,431 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:44:13,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752362660] [2021-11-19 15:44:13,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752362660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:13,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:13,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 15:44:13,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511180196] [2021-11-19 15:44:13,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:13,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:44:13,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:44:13,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:44:13,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:44:13,435 INFO L87 Difference]: Start difference. First operand 71371 states and 110139 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:20,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:20,126 INFO L93 Difference]: Finished difference Result 156506 states and 241835 transitions. [2021-11-19 15:44:20,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:44:20,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 341 [2021-11-19 15:44:20,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:44:20,329 INFO L225 Difference]: With dead ends: 156506 [2021-11-19 15:44:20,329 INFO L226 Difference]: Without dead ends: 85721 [2021-11-19 15:44:20,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:44:20,407 INFO L933 BasicCegarLoop]: 2524 mSDtfsCounter, 1098 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1098 SdHoareTripleChecker+Valid, 3926 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:44:20,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1098 Valid, 3926 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 15:44:20,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85721 states. [2021-11-19 15:44:27,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85721 to 85719. [2021-11-19 15:44:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85719 states, 85718 states have (on average 1.5255488928813086) internal successors, (130767), 85718 states have internal predecessors, (130767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:27,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85719 states to 85719 states and 130767 transitions. [2021-11-19 15:44:27,510 INFO L78 Accepts]: Start accepts. Automaton has 85719 states and 130767 transitions. Word has length 341 [2021-11-19 15:44:27,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:44:27,511 INFO L470 AbstractCegarLoop]: Abstraction has 85719 states and 130767 transitions. [2021-11-19 15:44:27,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:27,512 INFO L276 IsEmpty]: Start isEmpty. Operand 85719 states and 130767 transitions. [2021-11-19 15:44:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-11-19 15:44:27,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:44:27,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:44:27,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 15:44:27,559 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:44:27,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:44:27,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1849137352, now seen corresponding path program 1 times [2021-11-19 15:44:27,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:44:27,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586577511] [2021-11-19 15:44:27,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:44:27,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:44:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:44:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:44:27,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:44:27,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586577511] [2021-11-19 15:44:27,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586577511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:44:27,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:44:27,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 15:44:27,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275080870] [2021-11-19 15:44:27,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:44:27,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:44:27,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:44:27,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:44:27,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:44:27,721 INFO L87 Difference]: Start difference. First operand 85719 states and 130767 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:44:36,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:44:36,103 INFO L93 Difference]: Finished difference Result 199398 states and 305267 transitions. [2021-11-19 15:44:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:44:36,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 341 [2021-11-19 15:44:36,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted.