./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 16db63adfa8747ce86c67ae78be78e889eae71e4b07fbcb21a84ad0decbbdac7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:10:36,752 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:10:36,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:10:36,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:10:36,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:10:36,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:10:36,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:10:36,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:10:36,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:10:36,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:10:36,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:10:36,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:10:36,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:10:36,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:10:36,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:10:36,828 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:10:36,829 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:10:36,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:10:36,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:10:36,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:10:36,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:10:36,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:10:36,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:10:36,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:10:36,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:10:36,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:10:36,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:10:36,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:10:36,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:10:36,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:10:36,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:10:36,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:10:36,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:10:36,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:10:36,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:10:36,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:10:36,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:10:36,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:10:36,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:10:36,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:10:36,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:10:36,880 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:10:36,925 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:10:36,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:10:36,926 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:10:36,927 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:10:36,927 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:10:36,928 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:10:36,928 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:10:36,928 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:10:36,929 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:10:36,929 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:10:36,929 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:10:36,929 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:10:36,930 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:10:36,930 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:10:36,930 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:10:36,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:10:36,932 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:10:36,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:10:36,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:10:36,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:10:36,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:10:36,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:10:36,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:10:36,934 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:10:36,934 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:10:36,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:10:36,935 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:10:36,935 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:10:36,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:10:36,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:10:36,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:10:36,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:10:36,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:10:36,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:10:36,937 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:10:36,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:10:36,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:10:36,938 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:10:36,939 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:10:36,939 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_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16db63adfa8747ce86c67ae78be78e889eae71e4b07fbcb21a84ad0decbbdac7 [2021-11-07 01:10:37,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:10:37,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:10:37,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:10:37,325 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:10:37,326 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:10:37,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-07 01:10:37,446 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/data/4758c219f/88eef3bc5a944fed803d42d15942bc19/FLAG025cb0b95 [2021-11-07 01:10:38,069 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:10:38,070 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-07 01:10:38,103 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/data/4758c219f/88eef3bc5a944fed803d42d15942bc19/FLAG025cb0b95 [2021-11-07 01:10:38,372 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/data/4758c219f/88eef3bc5a944fed803d42d15942bc19 [2021-11-07 01:10:38,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:10:38,378 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:10:38,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:10:38,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:10:38,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:10:38,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:10:38" (1/1) ... [2021-11-07 01:10:38,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73d3dcc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:38, skipping insertion in model container [2021-11-07 01:10:38,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:10:38" (1/1) ... [2021-11-07 01:10:38,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:10:38,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:10:38,865 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2021-11-07 01:10:38,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:10:39,002 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:10:39,155 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2021-11-07 01:10:39,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:10:39,248 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:10:39,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:39 WrapperNode [2021-11-07 01:10:39,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:10:39,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:10:39,250 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:10:39,250 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:10:39,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:39" (1/1) ... [2021-11-07 01:10:39,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:39" (1/1) ... [2021-11-07 01:10:39,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:10:39,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:10:39,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:10:39,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:10:39,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:39" (1/1) ... [2021-11-07 01:10:39,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:39" (1/1) ... [2021-11-07 01:10:39,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:39" (1/1) ... [2021-11-07 01:10:39,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:39" (1/1) ... [2021-11-07 01:10:39,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:39" (1/1) ... [2021-11-07 01:10:39,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:39" (1/1) ... [2021-11-07 01:10:39,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:39" (1/1) ... [2021-11-07 01:10:39,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:10:39,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:10:39,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:10:39,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:10:39,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:39" (1/1) ... [2021-11-07 01:10:39,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:10:39,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:10:39,559 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:10:39,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:10:39,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:10:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:10:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:10:39,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:10:42,365 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:10:42,366 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:10:42,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:10:42 BoogieIcfgContainer [2021-11-07 01:10:42,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:10:42,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:10:42,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:10:42,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:10:42,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:10:38" (1/3) ... [2021-11-07 01:10:42,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6bfa4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:10:42, skipping insertion in model container [2021-11-07 01:10:42,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:39" (2/3) ... [2021-11-07 01:10:42,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6bfa4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:10:42, skipping insertion in model container [2021-11-07 01:10:42,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:10:42" (3/3) ... [2021-11-07 01:10:42,390 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-07 01:10:42,402 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:10:42,403 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:10:42,483 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:10:42,496 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:10:42,496 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:10:42,529 INFO L276 IsEmpty]: Start isEmpty. Operand has 255 states, 253 states have (on average 1.6798418972332017) internal successors, (425), 254 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:42,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 01:10:42,546 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:42,547 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:42,547 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:42,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:42,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1325608003, now seen corresponding path program 1 times [2021-11-07 01:10:42,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:10:42,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737948836] [2021-11-07 01:10:42,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:42,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:10:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:43,335 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:10:43,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737948836] [2021-11-07 01:10:43,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737948836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:43,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:43,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:10:43,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040658152] [2021-11-07 01:10:43,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:43,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:10:43,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:43,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:43,366 INFO L87 Difference]: Start difference. First operand has 255 states, 253 states have (on average 1.6798418972332017) internal successors, (425), 254 states have internal predecessors, (425), 0 states have call successors, (0), 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 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:43,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:43,462 INFO L93 Difference]: Finished difference Result 420 states and 690 transitions. [2021-11-07 01:10:43,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:43,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-11-07 01:10:43,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:43,483 INFO L225 Difference]: With dead ends: 420 [2021-11-07 01:10:43,484 INFO L226 Difference]: Without dead ends: 325 [2021-11-07 01:10:43,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:43,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-07 01:10:43,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 323. [2021-11-07 01:10:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.5372670807453417) internal successors, (495), 322 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 495 transitions. [2021-11-07 01:10:43,575 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 495 transitions. Word has length 101 [2021-11-07 01:10:43,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:43,576 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 495 transitions. [2021-11-07 01:10:43,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:43,577 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 495 transitions. [2021-11-07 01:10:43,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 01:10:43,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:43,583 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:43,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:10:43,584 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:43,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:43,585 INFO L85 PathProgramCache]: Analyzing trace with hash 672364081, now seen corresponding path program 1 times [2021-11-07 01:10:43,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:10:43,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542741351] [2021-11-07 01:10:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:43,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:10:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:43,774 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:10:43,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542741351] [2021-11-07 01:10:43,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542741351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:43,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:43,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:10:43,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976507939] [2021-11-07 01:10:43,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:43,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:10:43,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:43,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:43,780 INFO L87 Difference]: Start difference. First operand 323 states and 495 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:43,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:43,867 INFO L93 Difference]: Finished difference Result 571 states and 897 transitions. [2021-11-07 01:10:43,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:43,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-11-07 01:10:43,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:43,873 INFO L225 Difference]: With dead ends: 571 [2021-11-07 01:10:43,882 INFO L226 Difference]: Without dead ends: 412 [2021-11-07 01:10:43,884 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:43,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-07 01:10:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 410. [2021-11-07 01:10:43,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.547677261613692) internal successors, (633), 409 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 633 transitions. [2021-11-07 01:10:43,944 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 633 transitions. Word has length 103 [2021-11-07 01:10:43,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:43,945 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 633 transitions. [2021-11-07 01:10:43,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:43,946 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 633 transitions. [2021-11-07 01:10:43,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:10:43,949 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:43,950 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:43,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:10:43,950 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:43,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:43,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1922675800, now seen corresponding path program 1 times [2021-11-07 01:10:43,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:10:43,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54256717] [2021-11-07 01:10:43,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:43,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:10:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:44,136 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:10:44,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54256717] [2021-11-07 01:10:44,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54256717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:44,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:44,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:10:44,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73830586] [2021-11-07 01:10:44,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:44,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:10:44,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:44,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:44,148 INFO L87 Difference]: Start difference. First operand 410 states and 633 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:44,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:44,227 INFO L93 Difference]: Finished difference Result 849 states and 1344 transitions. [2021-11-07 01:10:44,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:44,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-11-07 01:10:44,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:44,238 INFO L225 Difference]: With dead ends: 849 [2021-11-07 01:10:44,239 INFO L226 Difference]: Without dead ends: 604 [2021-11-07 01:10:44,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:44,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-07 01:10:44,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 602. [2021-11-07 01:10:44,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 1.5707154742096505) internal successors, (944), 601 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:44,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 944 transitions. [2021-11-07 01:10:44,303 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 944 transitions. Word has length 106 [2021-11-07 01:10:44,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:44,305 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 944 transitions. [2021-11-07 01:10:44,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:44,305 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 944 transitions. [2021-11-07 01:10:44,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 01:10:44,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:44,308 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:44,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:10:44,309 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:44,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:44,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1327867533, now seen corresponding path program 1 times [2021-11-07 01:10:44,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:10:44,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531072289] [2021-11-07 01:10:44,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:44,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:10:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:44,424 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:10:44,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531072289] [2021-11-07 01:10:44,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531072289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:44,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:44,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:10:44,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95811109] [2021-11-07 01:10:44,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:44,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:10:44,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:44,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:44,428 INFO L87 Difference]: Start difference. First operand 602 states and 944 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:44,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:44,494 INFO L93 Difference]: Finished difference Result 1302 states and 2074 transitions. [2021-11-07 01:10:44,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:44,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 108 [2021-11-07 01:10:44,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:44,502 INFO L225 Difference]: With dead ends: 1302 [2021-11-07 01:10:44,503 INFO L226 Difference]: Without dead ends: 865 [2021-11-07 01:10:44,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:44,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-11-07 01:10:44,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 863. [2021-11-07 01:10:44,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 1.5812064965197217) internal successors, (1363), 862 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:44,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1363 transitions. [2021-11-07 01:10:44,566 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1363 transitions. Word has length 108 [2021-11-07 01:10:44,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:44,567 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1363 transitions. [2021-11-07 01:10:44,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1363 transitions. [2021-11-07 01:10:44,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 01:10:44,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:44,570 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:44,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:10:44,570 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:44,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:44,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1064008304, now seen corresponding path program 1 times [2021-11-07 01:10:44,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:10:44,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601160439] [2021-11-07 01:10:44,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:44,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:10:44,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:44,678 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:10:44,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601160439] [2021-11-07 01:10:44,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601160439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:44,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:44,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:10:44,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423750905] [2021-11-07 01:10:44,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:44,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:10:44,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:44,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:44,682 INFO L87 Difference]: Start difference. First operand 863 states and 1363 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:44,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:44,798 INFO L93 Difference]: Finished difference Result 2070 states and 3318 transitions. [2021-11-07 01:10:44,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:44,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-07 01:10:44,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:44,811 INFO L225 Difference]: With dead ends: 2070 [2021-11-07 01:10:44,811 INFO L226 Difference]: Without dead ends: 1390 [2021-11-07 01:10:44,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:44,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-11-07 01:10:44,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1388. [2021-11-07 01:10:44,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 1.592645998558039) internal successors, (2209), 1387 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:44,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2209 transitions. [2021-11-07 01:10:44,928 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2209 transitions. Word has length 111 [2021-11-07 01:10:44,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:44,928 INFO L470 AbstractCegarLoop]: Abstraction has 1388 states and 2209 transitions. [2021-11-07 01:10:44,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:44,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2209 transitions. [2021-11-07 01:10:44,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 01:10:44,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:44,931 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:44,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:10:44,932 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:44,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:44,932 INFO L85 PathProgramCache]: Analyzing trace with hash -877927785, now seen corresponding path program 1 times [2021-11-07 01:10:44,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:10:44,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353570543] [2021-11-07 01:10:44,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:44,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:10:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:45,058 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:10:45,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353570543] [2021-11-07 01:10:45,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353570543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:45,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:45,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:10:45,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933765915] [2021-11-07 01:10:45,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:45,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:10:45,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:45,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:45,065 INFO L87 Difference]: Start difference. First operand 1388 states and 2209 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:45,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:45,241 INFO L93 Difference]: Finished difference Result 3291 states and 5280 transitions. [2021-11-07 01:10:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:45,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-07 01:10:45,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:45,258 INFO L225 Difference]: With dead ends: 3291 [2021-11-07 01:10:45,258 INFO L226 Difference]: Without dead ends: 2086 [2021-11-07 01:10:45,261 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:45,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-11-07 01:10:45,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 2084. [2021-11-07 01:10:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 1.5962554008641383) internal successors, (3325), 2083 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:45,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 3325 transitions. [2021-11-07 01:10:45,452 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 3325 transitions. Word has length 113 [2021-11-07 01:10:45,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:45,452 INFO L470 AbstractCegarLoop]: Abstraction has 2084 states and 3325 transitions. [2021-11-07 01:10:45,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:45,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 3325 transitions. [2021-11-07 01:10:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 01:10:45,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:45,457 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:45,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:10:45,457 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:45,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:45,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2114041290, now seen corresponding path program 1 times [2021-11-07 01:10:45,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:10:45,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705218632] [2021-11-07 01:10:45,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:45,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:10:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:45,551 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:10:45,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705218632] [2021-11-07 01:10:45,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705218632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:45,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:45,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:10:45,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551373689] [2021-11-07 01:10:45,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:45,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:10:45,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:45,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:45,556 INFO L87 Difference]: Start difference. First operand 2084 states and 3325 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:45,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:45,840 INFO L93 Difference]: Finished difference Result 5391 states and 8664 transitions. [2021-11-07 01:10:45,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:45,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-07 01:10:45,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:45,871 INFO L225 Difference]: With dead ends: 5391 [2021-11-07 01:10:45,871 INFO L226 Difference]: Without dead ends: 3508 [2021-11-07 01:10:45,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:45,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2021-11-07 01:10:46,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 3506. [2021-11-07 01:10:46,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 1.5982881597717546) internal successors, (5602), 3505 states have internal predecessors, (5602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:46,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 5602 transitions. [2021-11-07 01:10:46,285 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 5602 transitions. Word has length 116 [2021-11-07 01:10:46,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:46,286 INFO L470 AbstractCegarLoop]: Abstraction has 3506 states and 5602 transitions. [2021-11-07 01:10:46,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:46,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 5602 transitions. [2021-11-07 01:10:46,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 01:10:46,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:46,289 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:46,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:10:46,290 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:46,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:46,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2139714335, now seen corresponding path program 1 times [2021-11-07 01:10:46,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:10:46,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767102330] [2021-11-07 01:10:46,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:46,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:10:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:46,392 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:10:46,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767102330] [2021-11-07 01:10:46,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767102330] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:46,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:46,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:10:46,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160037876] [2021-11-07 01:10:46,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:46,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:10:46,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:46,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:46,396 INFO L87 Difference]: Start difference. First operand 3506 states and 5602 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:46,791 INFO L93 Difference]: Finished difference Result 8712 states and 13974 transitions. [2021-11-07 01:10:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:46,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-07 01:10:46,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:46,829 INFO L225 Difference]: With dead ends: 8712 [2021-11-07 01:10:46,829 INFO L226 Difference]: Without dead ends: 5407 [2021-11-07 01:10:46,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:46,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5407 states. [2021-11-07 01:10:47,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5407 to 5405. [2021-11-07 01:10:47,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5405 states, 5404 states have (on average 1.5978904515173946) internal successors, (8635), 5404 states have internal predecessors, (8635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5405 states to 5405 states and 8635 transitions. [2021-11-07 01:10:47,318 INFO L78 Accepts]: Start accepts. Automaton has 5405 states and 8635 transitions. Word has length 118 [2021-11-07 01:10:47,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:47,319 INFO L470 AbstractCegarLoop]: Abstraction has 5405 states and 8635 transitions. [2021-11-07 01:10:47,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:47,320 INFO L276 IsEmpty]: Start isEmpty. Operand 5405 states and 8635 transitions. [2021-11-07 01:10:47,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 01:10:47,322 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:47,322 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:47,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:10:47,323 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:47,324 INFO L85 PathProgramCache]: Analyzing trace with hash 949471684, now seen corresponding path program 1 times [2021-11-07 01:10:47,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:10:47,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699759898] [2021-11-07 01:10:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:47,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:10:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:47,527 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:10:47,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699759898] [2021-11-07 01:10:47,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699759898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:47,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:47,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:10:47,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826864051] [2021-11-07 01:10:47,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:47,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:10:47,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:47,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:47,536 INFO L87 Difference]: Start difference. First operand 5405 states and 8635 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:48,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:48,806 INFO L93 Difference]: Finished difference Result 13488 states and 21561 transitions. [2021-11-07 01:10:48,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:10:48,807 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-07 01:10:48,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:48,873 INFO L225 Difference]: With dead ends: 13488 [2021-11-07 01:10:48,873 INFO L226 Difference]: Without dead ends: 8302 [2021-11-07 01:10:48,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:10:48,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8302 states. [2021-11-07 01:10:49,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8302 to 8288. [2021-11-07 01:10:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5888741402196211) internal successors, (13167), 8287 states have internal predecessors, (13167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13167 transitions. [2021-11-07 01:10:49,632 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13167 transitions. Word has length 121 [2021-11-07 01:10:49,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:49,632 INFO L470 AbstractCegarLoop]: Abstraction has 8288 states and 13167 transitions. [2021-11-07 01:10:49,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:49,634 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13167 transitions. [2021-11-07 01:10:49,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 01:10:49,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:49,636 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:49,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:10:49,636 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:49,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:49,637 INFO L85 PathProgramCache]: Analyzing trace with hash -698210882, now seen corresponding path program 1 times [2021-11-07 01:10:49,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:10:49,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045841144] [2021-11-07 01:10:49,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:49,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:10:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:49,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:10:49,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045841144] [2021-11-07 01:10:49,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045841144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:49,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:49,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:10:49,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016623635] [2021-11-07 01:10:49,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:49,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:10:49,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:49,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:49,757 INFO L87 Difference]: Start difference. First operand 8288 states and 13167 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:50,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:50,466 INFO L93 Difference]: Finished difference Result 16359 states and 26017 transitions. [2021-11-07 01:10:50,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:50,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-07 01:10:50,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:50,522 INFO L225 Difference]: With dead ends: 16359 [2021-11-07 01:10:50,522 INFO L226 Difference]: Without dead ends: 8290 [2021-11-07 01:10:50,539 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:10:50,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2021-11-07 01:10:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2021-11-07 01:10:51,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5847713285869434) internal successors, (13133), 8287 states have internal predecessors, (13133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13133 transitions. [2021-11-07 01:10:51,299 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13133 transitions. Word has length 122 [2021-11-07 01:10:51,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:51,304 INFO L470 AbstractCegarLoop]: Abstraction has 8288 states and 13133 transitions. [2021-11-07 01:10:51,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13133 transitions. [2021-11-07 01:10:51,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-07 01:10:51,307 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:51,307 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:51,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:10:51,308 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:51,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:51,308 INFO L85 PathProgramCache]: Analyzing trace with hash -232204853, now seen corresponding path program 1 times [2021-11-07 01:10:51,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:10:51,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903333467] [2021-11-07 01:10:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:51,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:10:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:51,438 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:10:51,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903333467] [2021-11-07 01:10:51,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903333467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:51,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:51,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:10:51,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618902382] [2021-11-07 01:10:51,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:51,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:10:51,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:51,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:51,442 INFO L87 Difference]: Start difference. First operand 8288 states and 13133 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:52,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:52,080 INFO L93 Difference]: Finished difference Result 16359 states and 25949 transitions. [2021-11-07 01:10:52,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:52,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-07 01:10:52,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:52,103 INFO L225 Difference]: With dead ends: 16359 [2021-11-07 01:10:52,103 INFO L226 Difference]: Without dead ends: 8290 [2021-11-07 01:10:52,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:10:52,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2021-11-07 01:10:52,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2021-11-07 01:10:52,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5806685169542658) internal successors, (13099), 8287 states have internal predecessors, (13099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13099 transitions. [2021-11-07 01:10:52,711 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13099 transitions. Word has length 123 [2021-11-07 01:10:52,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:52,711 INFO L470 AbstractCegarLoop]: Abstraction has 8288 states and 13099 transitions. [2021-11-07 01:10:52,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:52,712 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13099 transitions. [2021-11-07 01:10:52,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 01:10:52,714 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:52,714 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:52,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 01:10:52,714 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:52,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:52,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1333638181, now seen corresponding path program 1 times [2021-11-07 01:10:52,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:10:52,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73047089] [2021-11-07 01:10:52,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:52,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:10:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:52,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:10:52,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73047089] [2021-11-07 01:10:52,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73047089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:52,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:52,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:10:52,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242206046] [2021-11-07 01:10:52,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:52,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:10:52,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:52,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:52,815 INFO L87 Difference]: Start difference. First operand 8288 states and 13099 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:53,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:53,388 INFO L93 Difference]: Finished difference Result 16359 states and 25881 transitions. [2021-11-07 01:10:53,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:53,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-07 01:10:53,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:53,414 INFO L225 Difference]: With dead ends: 16359 [2021-11-07 01:10:53,414 INFO L226 Difference]: Without dead ends: 8290 [2021-11-07 01:10:53,429 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:10:53,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2021-11-07 01:10:53,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2021-11-07 01:10:53,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.576565705321588) internal successors, (13065), 8287 states have internal predecessors, (13065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13065 transitions. [2021-11-07 01:10:53,903 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13065 transitions. Word has length 124 [2021-11-07 01:10:53,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:53,904 INFO L470 AbstractCegarLoop]: Abstraction has 8288 states and 13065 transitions. [2021-11-07 01:10:53,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13065 transitions. [2021-11-07 01:10:53,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-07 01:10:53,906 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:53,907 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:53,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 01:10:53,907 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:53,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:53,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1660277294, now seen corresponding path program 1 times [2021-11-07 01:10:53,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:10:53,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107287861] [2021-11-07 01:10:53,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:53,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:10:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:53,988 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:10:53,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107287861] [2021-11-07 01:10:53,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107287861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:53,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:53,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:10:53,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105312209] [2021-11-07 01:10:53,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:53,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:10:53,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:53,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:53,991 INFO L87 Difference]: Start difference. First operand 8288 states and 13065 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:54,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:54,646 INFO L93 Difference]: Finished difference Result 16359 states and 25813 transitions. [2021-11-07 01:10:54,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:54,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-11-07 01:10:54,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:54,678 INFO L225 Difference]: With dead ends: 16359 [2021-11-07 01:10:54,678 INFO L226 Difference]: Without dead ends: 8290 [2021-11-07 01:10:54,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:10:54,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2021-11-07 01:10:55,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2021-11-07 01:10:55,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5724628936889102) internal successors, (13031), 8287 states have internal predecessors, (13031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13031 transitions. [2021-11-07 01:10:55,298 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13031 transitions. Word has length 125 [2021-11-07 01:10:55,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:55,299 INFO L470 AbstractCegarLoop]: Abstraction has 8288 states and 13031 transitions. [2021-11-07 01:10:55,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13031 transitions. [2021-11-07 01:10:55,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-07 01:10:55,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:55,302 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:55,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 01:10:55,303 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:55,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:55,304 INFO L85 PathProgramCache]: Analyzing trace with hash 684049603, now seen corresponding path program 1 times [2021-11-07 01:10:55,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:10:55,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268682351] [2021-11-07 01:10:55,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:55,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:10:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:55,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:10:55,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268682351] [2021-11-07 01:10:55,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268682351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:55,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:55,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:10:55,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243330343] [2021-11-07 01:10:55,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:55,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:10:55,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:55,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:55,511 INFO L87 Difference]: Start difference. First operand 8288 states and 13031 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:56,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:56,412 INFO L93 Difference]: Finished difference Result 16359 states and 25745 transitions. [2021-11-07 01:10:56,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:10:56,413 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-11-07 01:10:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:56,444 INFO L225 Difference]: With dead ends: 16359 [2021-11-07 01:10:56,444 INFO L226 Difference]: Without dead ends: 8290 [2021-11-07 01:10:56,459 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:10:56,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2021-11-07 01:10:56,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2021-11-07 01:10:56,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5705321588029444) internal successors, (13015), 8287 states have internal predecessors, (13015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:57,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13015 transitions. [2021-11-07 01:10:57,002 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13015 transitions. Word has length 127 [2021-11-07 01:10:57,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:57,003 INFO L470 AbstractCegarLoop]: Abstraction has 8288 states and 13015 transitions. [2021-11-07 01:10:57,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:57,004 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13015 transitions. [2021-11-07 01:10:57,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-07 01:10:57,006 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:57,006 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:57,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 01:10:57,007 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:57,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:57,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1148518135, now seen corresponding path program 1 times [2021-11-07 01:10:57,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:10:57,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411848349] [2021-11-07 01:10:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:57,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:10:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:57,210 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:10:57,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411848349] [2021-11-07 01:10:57,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411848349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:57,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:57,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:10:57,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212109742] [2021-11-07 01:10:57,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:57,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:10:57,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:57,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:57,212 INFO L87 Difference]: Start difference. First operand 8288 states and 13015 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:58,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:58,087 INFO L93 Difference]: Finished difference Result 20553 states and 32209 transitions. [2021-11-07 01:10:58,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:10:58,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-07 01:10:58,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:58,125 INFO L225 Difference]: With dead ends: 20553 [2021-11-07 01:10:58,125 INFO L226 Difference]: Without dead ends: 12484 [2021-11-07 01:10:58,141 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:10:58,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12484 states. [2021-11-07 01:10:59,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12484 to 12482. [2021-11-07 01:10:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12482 states, 12481 states have (on average 1.5613332265042865) internal successors, (19487), 12481 states have internal predecessors, (19487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:59,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12482 states to 12482 states and 19487 transitions. [2021-11-07 01:10:59,139 INFO L78 Accepts]: Start accepts. Automaton has 12482 states and 19487 transitions. Word has length 130 [2021-11-07 01:10:59,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:59,140 INFO L470 AbstractCegarLoop]: Abstraction has 12482 states and 19487 transitions. [2021-11-07 01:10:59,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:59,140 INFO L276 IsEmpty]: Start isEmpty. Operand 12482 states and 19487 transitions. [2021-11-07 01:10:59,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 01:10:59,142 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:59,143 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:59,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 01:10:59,143 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:59,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:59,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1277687264, now seen corresponding path program 1 times [2021-11-07 01:10:59,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:10:59,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434856757] [2021-11-07 01:10:59,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:59,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:10:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:59,416 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:10:59,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434856757] [2021-11-07 01:10:59,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434856757] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:59,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:59,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:10:59,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502312997] [2021-11-07 01:10:59,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:59,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:10:59,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:59,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:59,419 INFO L87 Difference]: Start difference. First operand 12482 states and 19487 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:00,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:00,356 INFO L93 Difference]: Finished difference Result 15360 states and 23868 transitions. [2021-11-07 01:11:00,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:11:00,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-07 01:11:00,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:00,394 INFO L225 Difference]: With dead ends: 15360 [2021-11-07 01:11:00,395 INFO L226 Difference]: Without dead ends: 15358 [2021-11-07 01:11:00,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:11:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15358 states. [2021-11-07 01:11:01,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15358 to 12496. [2021-11-07 01:11:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12496 states, 12495 states have (on average 1.5591036414565826) internal successors, (19481), 12495 states have internal predecessors, (19481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12496 states to 12496 states and 19481 transitions. [2021-11-07 01:11:01,387 INFO L78 Accepts]: Start accepts. Automaton has 12496 states and 19481 transitions. Word has length 131 [2021-11-07 01:11:01,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:01,388 INFO L470 AbstractCegarLoop]: Abstraction has 12496 states and 19481 transitions. [2021-11-07 01:11:01,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:01,388 INFO L276 IsEmpty]: Start isEmpty. Operand 12496 states and 19481 transitions. [2021-11-07 01:11:01,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-07 01:11:01,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:01,391 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:01,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 01:11:01,391 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:11:01,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:01,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1212519615, now seen corresponding path program 1 times [2021-11-07 01:11:01,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:11:01,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634689161] [2021-11-07 01:11:01,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:01,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:11:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:11:02,183 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:11:02,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634689161] [2021-11-07 01:11:02,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634689161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:11:02,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905262311] [2021-11-07 01:11:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:02,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:11:02,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:11:02,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:11:02,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:11:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:02,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:11:02,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:11:03,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:11:03,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905262311] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:03,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:11:03,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [13] total 16 [2021-11-07 01:11:03,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884081879] [2021-11-07 01:11:03,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:11:03,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:11:03,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:11:03,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:11:03,648 INFO L87 Difference]: Start difference. First operand 12496 states and 19481 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:05,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:05,952 INFO L93 Difference]: Finished difference Result 36720 states and 57288 transitions. [2021-11-07 01:11:05,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:11:05,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-07 01:11:05,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:06,002 INFO L225 Difference]: With dead ends: 36720 [2021-11-07 01:11:06,002 INFO L226 Difference]: Without dead ends: 24233 [2021-11-07 01:11:06,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:11:06,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24233 states. [2021-11-07 01:11:07,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24233 to 24231. [2021-11-07 01:11:07,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24231 states, 24230 states have (on average 1.5529096161782914) internal successors, (37627), 24230 states have internal predecessors, (37627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:07,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24231 states to 24231 states and 37627 transitions. [2021-11-07 01:11:07,957 INFO L78 Accepts]: Start accepts. Automaton has 24231 states and 37627 transitions. Word has length 139 [2021-11-07 01:11:07,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:07,957 INFO L470 AbstractCegarLoop]: Abstraction has 24231 states and 37627 transitions. [2021-11-07 01:11:07,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:07,957 INFO L276 IsEmpty]: Start isEmpty. Operand 24231 states and 37627 transitions. [2021-11-07 01:11:07,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-07 01:11:07,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:07,961 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:08,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:08,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 01:11:08,174 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:11:08,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:08,175 INFO L85 PathProgramCache]: Analyzing trace with hash -392625810, now seen corresponding path program 1 times [2021-11-07 01:11:08,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:11:08,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750884060] [2021-11-07 01:11:08,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:08,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:11:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:11:08,227 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:11:08,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750884060] [2021-11-07 01:11:08,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750884060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:08,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:08,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:11:08,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396356702] [2021-11-07 01:11:08,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:08,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:11:08,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:08,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:08,233 INFO L87 Difference]: Start difference. First operand 24231 states and 37627 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:11,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:11,271 INFO L93 Difference]: Finished difference Result 72665 states and 112839 transitions. [2021-11-07 01:11:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:11,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-07 01:11:11,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:11,551 INFO L225 Difference]: With dead ends: 72665 [2021-11-07 01:11:11,551 INFO L226 Difference]: Without dead ends: 48451 [2021-11-07 01:11:11,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:11,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48451 states. [2021-11-07 01:11:13,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48451 to 24234. [2021-11-07 01:11:13,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24234 states, 24233 states have (on average 1.5528411670036726) internal successors, (37630), 24233 states have internal predecessors, (37630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:13,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24234 states to 24234 states and 37630 transitions. [2021-11-07 01:11:13,896 INFO L78 Accepts]: Start accepts. Automaton has 24234 states and 37630 transitions. Word has length 141 [2021-11-07 01:11:13,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:13,896 INFO L470 AbstractCegarLoop]: Abstraction has 24234 states and 37630 transitions. [2021-11-07 01:11:13,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:13,897 INFO L276 IsEmpty]: Start isEmpty. Operand 24234 states and 37630 transitions. [2021-11-07 01:11:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-07 01:11:13,899 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:13,899 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:13,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 01:11:13,899 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:11:13,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:13,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1399762905, now seen corresponding path program 1 times [2021-11-07 01:11:13,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:11:13,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516212507] [2021-11-07 01:11:13,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:13,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:11:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:11:14,004 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:11:14,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516212507] [2021-11-07 01:11:14,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516212507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:14,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:14,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:11:14,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845364472] [2021-11-07 01:11:14,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:14,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:11:14,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:14,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:14,008 INFO L87 Difference]: Start difference. First operand 24234 states and 37630 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:18,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:18,131 INFO L93 Difference]: Finished difference Result 71663 states and 111326 transitions. [2021-11-07 01:11:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:18,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-07 01:11:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:18,229 INFO L225 Difference]: With dead ends: 71663 [2021-11-07 01:11:18,229 INFO L226 Difference]: Without dead ends: 47553 [2021-11-07 01:11:18,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:18,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47553 states. [2021-11-07 01:11:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47553 to 47551. [2021-11-07 01:11:22,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47551 states, 47550 states have (on average 1.549106203995794) internal successors, (73660), 47550 states have internal predecessors, (73660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:22,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47551 states to 47551 states and 73660 transitions. [2021-11-07 01:11:22,462 INFO L78 Accepts]: Start accepts. Automaton has 47551 states and 73660 transitions. Word has length 141 [2021-11-07 01:11:22,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:22,462 INFO L470 AbstractCegarLoop]: Abstraction has 47551 states and 73660 transitions. [2021-11-07 01:11:22,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:22,463 INFO L276 IsEmpty]: Start isEmpty. Operand 47551 states and 73660 transitions. [2021-11-07 01:11:22,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 01:11:22,465 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:22,466 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:22,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 01:11:22,466 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:11:22,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:22,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1636414588, now seen corresponding path program 1 times [2021-11-07 01:11:22,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:11:22,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827488572] [2021-11-07 01:11:22,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:22,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:11:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:11:23,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:11:23,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827488572] [2021-11-07 01:11:23,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827488572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:11:23,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908912954] [2021-11-07 01:11:23,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:23,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:11:23,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:11:23,287 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:11:23,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:11:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:23,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:11:23,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:11:24,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:11:25,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908912954] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:25,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:11:25,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [14] total 17 [2021-11-07 01:11:25,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231025992] [2021-11-07 01:11:25,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:11:25,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:11:25,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:11:25,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:11:25,231 INFO L87 Difference]: Start difference. First operand 47551 states and 73660 transitions. Second operand has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:33,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:33,223 INFO L93 Difference]: Finished difference Result 140249 states and 217370 transitions. [2021-11-07 01:11:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:11:33,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 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 142 [2021-11-07 01:11:33,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:33,555 INFO L225 Difference]: With dead ends: 140249 [2021-11-07 01:11:33,556 INFO L226 Difference]: Without dead ends: 92761 [2021-11-07 01:11:33,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:11:33,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92761 states. [2021-11-07 01:11:41,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92761 to 92759. [2021-11-07 01:11:41,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92759 states, 92758 states have (on average 1.5440393281442033) internal successors, (143222), 92758 states have internal predecessors, (143222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:42,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92759 states to 92759 states and 143222 transitions. [2021-11-07 01:11:42,214 INFO L78 Accepts]: Start accepts. Automaton has 92759 states and 143222 transitions. Word has length 142 [2021-11-07 01:11:42,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:42,216 INFO L470 AbstractCegarLoop]: Abstraction has 92759 states and 143222 transitions. [2021-11-07 01:11:42,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:42,217 INFO L276 IsEmpty]: Start isEmpty. Operand 92759 states and 143222 transitions. [2021-11-07 01:11:42,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-07 01:11:42,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:42,235 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:42,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-07 01:11:42,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b42042ba-71ce-4e46-971b-8613de247337/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:11:42,454 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:11:42,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:42,455 INFO L85 PathProgramCache]: Analyzing trace with hash -34359920, now seen corresponding path program 1 times [2021-11-07 01:11:42,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:11:42,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517331498] [2021-11-07 01:11:42,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:42,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:11:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:11:42,513 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:11:42,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517331498] [2021-11-07 01:11:42,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517331498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:42,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:42,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:11:42,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984320957] [2021-11-07 01:11:42,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:42,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:11:42,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:42,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:42,516 INFO L87 Difference]: Start difference. First operand 92759 states and 143222 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)