./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/bin/utaipan-TEXQjIfE4P --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 3af6b76c8112c46f4f3f430659495baba58dab9f6300080b3889ede952fb5526 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:08:48,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:08:48,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:08:48,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:08:48,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:08:48,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:08:48,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:08:48,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:08:48,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:08:48,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:08:48,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:08:48,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:08:48,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:08:48,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:08:48,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:08:48,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:08:48,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:08:48,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:08:48,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:08:48,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:08:48,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:08:48,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:08:48,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:08:48,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:08:48,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:08:48,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:08:48,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:08:48,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:08:48,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:08:48,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:08:48,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:08:48,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:08:48,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:08:48,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:08:48,856 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:08:48,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:08:48,857 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:08:48,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:08:48,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:08:48,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:08:48,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:08:48,861 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:08:48,888 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:08:48,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:08:48,888 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:08:48,889 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:08:48,889 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:08:48,890 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:08:48,890 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:08:48,890 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:08:48,891 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:08:48,891 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:08:48,891 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:08:48,891 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:08:48,892 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:08:48,892 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:08:48,892 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:08:48,893 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:08:48,893 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:08:48,893 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:08:48,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:08:48,894 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:08:48,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:08:48,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:08:48,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:08:48,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:08:48,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:08:48,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:08:48,896 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:08:48,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:08:48,897 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:08:48,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:08:48,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:08:48,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:08:48,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:08:48,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:08:48,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:08:48,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:08:48,899 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:08:48,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:08:48,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:08:48,900 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:08:48,900 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:08:48,900 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_bbb2f35d-c5de-44a1-a049-0673262d1a62/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3af6b76c8112c46f4f3f430659495baba58dab9f6300080b3889ede952fb5526 [2021-11-21 01:08:49,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:08:49,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:08:49,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:08:49,195 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:08:49,199 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:08:49,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-21 01:08:49,276 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/bin/utaipan-TEXQjIfE4P/data/5a41263e1/5d2a2c12f7d84cfa9f51779df08c087e/FLAG581388f83 [2021-11-21 01:08:49,761 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:08:49,762 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-21 01:08:49,777 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/bin/utaipan-TEXQjIfE4P/data/5a41263e1/5d2a2c12f7d84cfa9f51779df08c087e/FLAG581388f83 [2021-11-21 01:08:50,121 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/bin/utaipan-TEXQjIfE4P/data/5a41263e1/5d2a2c12f7d84cfa9f51779df08c087e [2021-11-21 01:08:50,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:08:50,125 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:08:50,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:08:50,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:08:50,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:08:50,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:08:50" (1/1) ... [2021-11-21 01:08:50,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b027e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:08:50, skipping insertion in model container [2021-11-21 01:08:50,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:08:50" (1/1) ... [2021-11-21 01:08:50,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:08:50,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:08:50,459 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7752,7765] [2021-11-21 01:08:50,522 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:08:50,535 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:08:50,599 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7752,7765] [2021-11-21 01:08:50,629 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:08:50,647 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:08:50,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:08:50 WrapperNode [2021-11-21 01:08:50,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:08:50,649 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:08:50,649 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:08:50,649 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:08:50,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:08:50" (1/1) ... [2021-11-21 01:08:50,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:08:50" (1/1) ... [2021-11-21 01:08:50,719 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 617 [2021-11-21 01:08:50,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:08:50,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:08:50,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:08:50,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:08:50,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:08:50" (1/1) ... [2021-11-21 01:08:50,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:08:50" (1/1) ... [2021-11-21 01:08:50,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:08:50" (1/1) ... [2021-11-21 01:08:50,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:08:50" (1/1) ... [2021-11-21 01:08:50,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:08:50" (1/1) ... [2021-11-21 01:08:50,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:08:50" (1/1) ... [2021-11-21 01:08:50,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:08:50" (1/1) ... [2021-11-21 01:08:50,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:08:50,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:08:50,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:08:50,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:08:50,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:08:50" (1/1) ... [2021-11-21 01:08:50,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:08:50,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:08:50,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:08:50,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:08:50,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:08:50,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:08:50,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:08:50,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:08:50,989 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:08:50,990 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:08:51,724 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:08:52,011 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:08:52,011 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:08:52,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:08:52 BoogieIcfgContainer [2021-11-21 01:08:52,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:08:52,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:08:52,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:08:52,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:08:52,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:08:50" (1/3) ... [2021-11-21 01:08:52,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3050217e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:08:52, skipping insertion in model container [2021-11-21 01:08:52,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:08:50" (2/3) ... [2021-11-21 01:08:52,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3050217e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:08:52, skipping insertion in model container [2021-11-21 01:08:52,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:08:52" (3/3) ... [2021-11-21 01:08:52,027 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-21 01:08:52,032 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:08:52,032 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:08:52,114 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:08:52,128 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 [2021-11-21 01:08:52,128 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:08:52,146 INFO L276 IsEmpty]: Start isEmpty. Operand has 92 states, 90 states have (on average 1.7444444444444445) internal successors, (157), 91 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:52,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 01:08:52,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:52,154 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:52,155 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:52,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:52,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1672882808, now seen corresponding path program 1 times [2021-11-21 01:08:52,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:52,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221773319] [2021-11-21 01:08:52,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:52,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:52,533 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:52,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221773319] [2021-11-21 01:08:52,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221773319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:08:52,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:08:52,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:08:52,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92949812] [2021-11-21 01:08:52,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:08:52,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:08:52,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:52,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:08:52,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:08:52,572 INFO L87 Difference]: Start difference. First operand has 92 states, 90 states have (on average 1.7444444444444445) internal successors, (157), 91 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:52,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:52,709 INFO L93 Difference]: Finished difference Result 210 states and 346 transitions. [2021-11-21 01:08:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:08:52,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-11-21 01:08:52,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:52,722 INFO L225 Difference]: With dead ends: 210 [2021-11-21 01:08:52,722 INFO L226 Difference]: Without dead ends: 140 [2021-11-21 01:08:52,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:08:52,734 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 108 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:52,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 336 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:08:52,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-21 01:08:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2021-11-21 01:08:52,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.5255474452554745) internal successors, (209), 137 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 209 transitions. [2021-11-21 01:08:52,814 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 209 transitions. Word has length 37 [2021-11-21 01:08:52,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:52,815 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 209 transitions. [2021-11-21 01:08:52,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:52,815 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 209 transitions. [2021-11-21 01:08:52,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 01:08:52,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:52,817 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:52,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:08:52,818 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:52,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:52,819 INFO L85 PathProgramCache]: Analyzing trace with hash -412365627, now seen corresponding path program 1 times [2021-11-21 01:08:52,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:52,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631104675] [2021-11-21 01:08:52,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:52,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:52,985 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:52,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631104675] [2021-11-21 01:08:52,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631104675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:08:52,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:08:52,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:08:52,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991647970] [2021-11-21 01:08:52,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:08:52,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:08:52,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:52,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:08:52,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:08:52,990 INFO L87 Difference]: Start difference. First operand 138 states and 209 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:53,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:53,100 INFO L93 Difference]: Finished difference Result 315 states and 496 transitions. [2021-11-21 01:08:53,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:08:53,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-11-21 01:08:53,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:53,106 INFO L225 Difference]: With dead ends: 315 [2021-11-21 01:08:53,107 INFO L226 Difference]: Without dead ends: 203 [2021-11-21 01:08:53,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:08:53,114 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 95 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:53,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 219 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:08:53,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-21 01:08:53,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2021-11-21 01:08:53,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.54) internal successors, (308), 200 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:53,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 308 transitions. [2021-11-21 01:08:53,147 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 308 transitions. Word has length 39 [2021-11-21 01:08:53,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:53,150 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 308 transitions. [2021-11-21 01:08:53,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:53,151 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 308 transitions. [2021-11-21 01:08:53,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 01:08:53,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:53,157 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:53,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:08:53,157 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:53,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:53,164 INFO L85 PathProgramCache]: Analyzing trace with hash 393608966, now seen corresponding path program 1 times [2021-11-21 01:08:53,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:53,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643156087] [2021-11-21 01:08:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:53,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:53,253 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:53,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643156087] [2021-11-21 01:08:53,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643156087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:08:53,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:08:53,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:08:53,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080292786] [2021-11-21 01:08:53,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:08:53,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:08:53,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:53,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:08:53,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:08:53,257 INFO L87 Difference]: Start difference. First operand 201 states and 308 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:53,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:53,340 INFO L93 Difference]: Finished difference Result 505 states and 799 transitions. [2021-11-21 01:08:53,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:08:53,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-21 01:08:53,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:53,345 INFO L225 Difference]: With dead ends: 505 [2021-11-21 01:08:53,345 INFO L226 Difference]: Without dead ends: 332 [2021-11-21 01:08:53,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:08:53,357 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 95 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:53,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 264 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:08:53,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-21 01:08:53,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 330. [2021-11-21 01:08:53,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.5653495440729484) internal successors, (515), 329 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:53,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 515 transitions. [2021-11-21 01:08:53,400 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 515 transitions. Word has length 41 [2021-11-21 01:08:53,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:53,401 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 515 transitions. [2021-11-21 01:08:53,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:53,402 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 515 transitions. [2021-11-21 01:08:53,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-21 01:08:53,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:53,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:53,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:08:53,407 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:53,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:53,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1940883160, now seen corresponding path program 1 times [2021-11-21 01:08:53,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:53,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188337981] [2021-11-21 01:08:53,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:53,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:53,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:53,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188337981] [2021-11-21 01:08:53,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188337981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:08:53,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:08:53,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:08:53,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948771615] [2021-11-21 01:08:53,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:08:53,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:08:53,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:53,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:08:53,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:08:53,515 INFO L87 Difference]: Start difference. First operand 330 states and 515 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:53,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:53,587 INFO L93 Difference]: Finished difference Result 821 states and 1306 transitions. [2021-11-21 01:08:53,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:08:53,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-11-21 01:08:53,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:53,592 INFO L225 Difference]: With dead ends: 821 [2021-11-21 01:08:53,592 INFO L226 Difference]: Without dead ends: 519 [2021-11-21 01:08:53,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:08:53,594 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 94 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:53,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 235 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:08:53,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-11-21 01:08:53,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 517. [2021-11-21 01:08:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.5794573643410852) internal successors, (815), 516 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:53,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 815 transitions. [2021-11-21 01:08:53,639 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 815 transitions. Word has length 43 [2021-11-21 01:08:53,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:53,641 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 815 transitions. [2021-11-21 01:08:53,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 815 transitions. [2021-11-21 01:08:53,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 01:08:53,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:53,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:53,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:08:53,645 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:53,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:53,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1390561129, now seen corresponding path program 1 times [2021-11-21 01:08:53,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:53,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922822120] [2021-11-21 01:08:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:53,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:53,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:53,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922822120] [2021-11-21 01:08:53,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922822120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:08:53,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:08:53,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:08:53,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308195853] [2021-11-21 01:08:53,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:08:53,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:08:53,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:53,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:08:53,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:08:53,724 INFO L87 Difference]: Start difference. First operand 517 states and 815 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:53,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:53,811 INFO L93 Difference]: Finished difference Result 1337 states and 2134 transitions. [2021-11-21 01:08:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:08:53,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-11-21 01:08:53,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:53,818 INFO L225 Difference]: With dead ends: 1337 [2021-11-21 01:08:53,819 INFO L226 Difference]: Without dead ends: 864 [2021-11-21 01:08:53,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:08:53,821 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 89 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:53,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 240 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:08:53,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-11-21 01:08:53,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 862. [2021-11-21 01:08:53,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 1.5807200929152148) internal successors, (1361), 861 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:53,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1361 transitions. [2021-11-21 01:08:53,874 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1361 transitions. Word has length 45 [2021-11-21 01:08:53,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:53,875 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1361 transitions. [2021-11-21 01:08:53,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:53,875 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1361 transitions. [2021-11-21 01:08:53,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 01:08:53,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:53,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:53,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:08:53,877 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:53,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:53,879 INFO L85 PathProgramCache]: Analyzing trace with hash 610473804, now seen corresponding path program 1 times [2021-11-21 01:08:53,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:53,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779413786] [2021-11-21 01:08:53,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:53,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:53,951 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:53,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779413786] [2021-11-21 01:08:53,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779413786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:08:53,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:08:53,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:08:53,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439552505] [2021-11-21 01:08:53,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:08:53,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:08:53,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:53,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:08:53,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:08:53,954 INFO L87 Difference]: Start difference. First operand 862 states and 1361 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:54,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:54,075 INFO L93 Difference]: Finished difference Result 2169 states and 3457 transitions. [2021-11-21 01:08:54,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:08:54,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-21 01:08:54,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:54,085 INFO L225 Difference]: With dead ends: 2169 [2021-11-21 01:08:54,086 INFO L226 Difference]: Without dead ends: 1351 [2021-11-21 01:08:54,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:08:54,088 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 88 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:54,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 237 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:08:54,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-11-21 01:08:54,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1349. [2021-11-21 01:08:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 1.586053412462908) internal successors, (2138), 1348 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:54,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 2138 transitions. [2021-11-21 01:08:54,173 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 2138 transitions. Word has length 47 [2021-11-21 01:08:54,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:54,173 INFO L470 AbstractCegarLoop]: Abstraction has 1349 states and 2138 transitions. [2021-11-21 01:08:54,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:54,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 2138 transitions. [2021-11-21 01:08:54,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-21 01:08:54,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:54,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:54,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:08:54,175 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:54,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:54,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1645647027, now seen corresponding path program 1 times [2021-11-21 01:08:54,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:54,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66337321] [2021-11-21 01:08:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:54,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:54,267 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:54,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66337321] [2021-11-21 01:08:54,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66337321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:08:54,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:08:54,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:08:54,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868738062] [2021-11-21 01:08:54,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:08:54,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:08:54,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:54,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:08:54,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:08:54,276 INFO L87 Difference]: Start difference. First operand 1349 states and 2138 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:54,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:54,651 INFO L93 Difference]: Finished difference Result 3437 states and 5465 transitions. [2021-11-21 01:08:54,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:08:54,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-11-21 01:08:54,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:54,665 INFO L225 Difference]: With dead ends: 3437 [2021-11-21 01:08:54,665 INFO L226 Difference]: Without dead ends: 2148 [2021-11-21 01:08:54,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:08:54,669 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 546 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:54,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 935 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:08:54,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2021-11-21 01:08:54,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 2138. [2021-11-21 01:08:54,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 1.5779129620963968) internal successors, (3372), 2137 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:54,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3372 transitions. [2021-11-21 01:08:54,851 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3372 transitions. Word has length 49 [2021-11-21 01:08:54,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:54,851 INFO L470 AbstractCegarLoop]: Abstraction has 2138 states and 3372 transitions. [2021-11-21 01:08:54,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:54,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3372 transitions. [2021-11-21 01:08:54,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 01:08:54,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:54,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:54,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:08:54,853 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:54,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:54,854 INFO L85 PathProgramCache]: Analyzing trace with hash 462045524, now seen corresponding path program 1 times [2021-11-21 01:08:54,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:54,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602556075] [2021-11-21 01:08:54,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:54,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:54,913 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:54,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602556075] [2021-11-21 01:08:54,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602556075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:08:54,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:08:54,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:08:54,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355588461] [2021-11-21 01:08:54,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:08:54,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:08:54,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:54,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:08:54,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:08:54,916 INFO L87 Difference]: Start difference. First operand 2138 states and 3372 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:55,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:55,121 INFO L93 Difference]: Finished difference Result 4218 states and 6669 transitions. [2021-11-21 01:08:55,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:08:55,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-21 01:08:55,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:55,135 INFO L225 Difference]: With dead ends: 4218 [2021-11-21 01:08:55,137 INFO L226 Difference]: Without dead ends: 2140 [2021-11-21 01:08:55,143 INFO L932 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 [2021-11-21 01:08:55,144 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 182 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:55,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 329 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:08:55,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-11-21 01:08:55,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2138. [2021-11-21 01:08:55,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 1.5722976134768367) internal successors, (3360), 2137 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:55,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3360 transitions. [2021-11-21 01:08:55,362 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3360 transitions. Word has length 50 [2021-11-21 01:08:55,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:55,363 INFO L470 AbstractCegarLoop]: Abstraction has 2138 states and 3360 transitions. [2021-11-21 01:08:55,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:55,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3360 transitions. [2021-11-21 01:08:55,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 01:08:55,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:55,365 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:55,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:08:55,365 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:55,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:55,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1380563188, now seen corresponding path program 1 times [2021-11-21 01:08:55,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:55,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339739203] [2021-11-21 01:08:55,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:55,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:55,449 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:55,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339739203] [2021-11-21 01:08:55,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339739203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:08:55,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:08:55,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:08:55,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297566311] [2021-11-21 01:08:55,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:08:55,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:08:55,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:55,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:08:55,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:08:55,451 INFO L87 Difference]: Start difference. First operand 2138 states and 3360 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:55,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:55,671 INFO L93 Difference]: Finished difference Result 4218 states and 6645 transitions. [2021-11-21 01:08:55,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:08:55,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-11-21 01:08:55,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:55,684 INFO L225 Difference]: With dead ends: 4218 [2021-11-21 01:08:55,684 INFO L226 Difference]: Without dead ends: 2140 [2021-11-21 01:08:55,687 INFO L932 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 [2021-11-21 01:08:55,689 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 190 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:55,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 335 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:08:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-11-21 01:08:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2138. [2021-11-21 01:08:55,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 1.5666822648572765) internal successors, (3348), 2137 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:55,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3348 transitions. [2021-11-21 01:08:55,842 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3348 transitions. Word has length 51 [2021-11-21 01:08:55,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:55,843 INFO L470 AbstractCegarLoop]: Abstraction has 2138 states and 3348 transitions. [2021-11-21 01:08:55,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:55,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3348 transitions. [2021-11-21 01:08:55,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 01:08:55,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:55,845 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:55,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:08:55,846 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:55,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:55,846 INFO L85 PathProgramCache]: Analyzing trace with hash -205602277, now seen corresponding path program 1 times [2021-11-21 01:08:55,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:55,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726551214] [2021-11-21 01:08:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:55,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:55,907 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:55,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726551214] [2021-11-21 01:08:55,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726551214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:08:55,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:08:55,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:08:55,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572238041] [2021-11-21 01:08:55,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:08:55,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:08:55,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:55,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:08:55,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:08:55,913 INFO L87 Difference]: Start difference. First operand 2138 states and 3348 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:56,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:56,136 INFO L93 Difference]: Finished difference Result 4218 states and 6621 transitions. [2021-11-21 01:08:56,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:08:56,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-21 01:08:56,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:56,151 INFO L225 Difference]: With dead ends: 4218 [2021-11-21 01:08:56,151 INFO L226 Difference]: Without dead ends: 2140 [2021-11-21 01:08:56,154 INFO L932 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 [2021-11-21 01:08:56,155 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 188 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:56,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 338 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:08:56,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-11-21 01:08:56,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2138. [2021-11-21 01:08:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 1.5610669162377164) internal successors, (3336), 2137 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:56,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3336 transitions. [2021-11-21 01:08:56,300 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3336 transitions. Word has length 52 [2021-11-21 01:08:56,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:56,301 INFO L470 AbstractCegarLoop]: Abstraction has 2138 states and 3336 transitions. [2021-11-21 01:08:56,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:56,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3336 transitions. [2021-11-21 01:08:56,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-21 01:08:56,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:56,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:56,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:08:56,303 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:56,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:56,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1532603956, now seen corresponding path program 1 times [2021-11-21 01:08:56,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:56,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038607648] [2021-11-21 01:08:56,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:56,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:56,465 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:56,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038607648] [2021-11-21 01:08:56,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038607648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:08:56,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:08:56,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:08:56,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693129366] [2021-11-21 01:08:56,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:08:56,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:08:56,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:56,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:08:56,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:08:56,468 INFO L87 Difference]: Start difference. First operand 2138 states and 3336 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:56,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:56,721 INFO L93 Difference]: Finished difference Result 4218 states and 6597 transitions. [2021-11-21 01:08:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:08:56,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-11-21 01:08:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:56,734 INFO L225 Difference]: With dead ends: 4218 [2021-11-21 01:08:56,735 INFO L226 Difference]: Without dead ends: 2140 [2021-11-21 01:08:56,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:08:56,739 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 293 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:56,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 324 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:08:56,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-11-21 01:08:56,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2138. [2021-11-21 01:08:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 1.557323350491343) internal successors, (3328), 2137 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3328 transitions. [2021-11-21 01:08:56,912 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3328 transitions. Word has length 54 [2021-11-21 01:08:56,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:56,913 INFO L470 AbstractCegarLoop]: Abstraction has 2138 states and 3328 transitions. [2021-11-21 01:08:56,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:56,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3328 transitions. [2021-11-21 01:08:56,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-21 01:08:56,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:56,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:56,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:08:56,915 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:56,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:56,916 INFO L85 PathProgramCache]: Analyzing trace with hash -55680634, now seen corresponding path program 1 times [2021-11-21 01:08:56,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:56,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756779205] [2021-11-21 01:08:56,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:56,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:57,066 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:57,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756779205] [2021-11-21 01:08:57,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756779205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:08:57,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:08:57,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:08:57,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145675742] [2021-11-21 01:08:57,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:08:57,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:08:57,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:57,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:08:57,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:08:57,068 INFO L87 Difference]: Start difference. First operand 2138 states and 3328 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:57,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:57,410 INFO L93 Difference]: Finished difference Result 5390 states and 8383 transitions. [2021-11-21 01:08:57,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:08:57,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-11-21 01:08:57,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:57,430 INFO L225 Difference]: With dead ends: 5390 [2021-11-21 01:08:57,431 INFO L226 Difference]: Without dead ends: 3312 [2021-11-21 01:08:57,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:08:57,436 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 290 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:57,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 343 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:08:57,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3312 states. [2021-11-21 01:08:57,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3312 to 3310. [2021-11-21 01:08:57,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3310 states, 3309 states have (on average 1.5466908431550317) internal successors, (5118), 3309 states have internal predecessors, (5118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:57,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3310 states to 3310 states and 5118 transitions. [2021-11-21 01:08:57,697 INFO L78 Accepts]: Start accepts. Automaton has 3310 states and 5118 transitions. Word has length 57 [2021-11-21 01:08:57,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:57,698 INFO L470 AbstractCegarLoop]: Abstraction has 3310 states and 5118 transitions. [2021-11-21 01:08:57,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3310 states and 5118 transitions. [2021-11-21 01:08:57,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-21 01:08:57,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:57,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:57,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 01:08:57,700 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:57,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:57,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1715288194, now seen corresponding path program 1 times [2021-11-21 01:08:57,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:57,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056389091] [2021-11-21 01:08:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:57,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:57,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:57,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056389091] [2021-11-21 01:08:57,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056389091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:08:57,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:08:57,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:08:57,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065804774] [2021-11-21 01:08:57,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:08:57,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:08:57,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:57,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:08:57,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:08:57,816 INFO L87 Difference]: Start difference. First operand 3310 states and 5118 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:58,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:58,281 INFO L93 Difference]: Finished difference Result 4044 states and 6217 transitions. [2021-11-21 01:08:58,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:08:58,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-11-21 01:08:58,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:58,306 INFO L225 Difference]: With dead ends: 4044 [2021-11-21 01:08:58,306 INFO L226 Difference]: Without dead ends: 4042 [2021-11-21 01:08:58,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:08:58,309 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 256 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:58,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 885 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:08:58,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4042 states. [2021-11-21 01:08:58,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4042 to 3316. [2021-11-21 01:08:58,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3316 states, 3315 states have (on average 1.5438914027149322) internal successors, (5118), 3315 states have internal predecessors, (5118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:58,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3316 states to 3316 states and 5118 transitions. [2021-11-21 01:08:58,581 INFO L78 Accepts]: Start accepts. Automaton has 3316 states and 5118 transitions. Word has length 58 [2021-11-21 01:08:58,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:58,582 INFO L470 AbstractCegarLoop]: Abstraction has 3316 states and 5118 transitions. [2021-11-21 01:08:58,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:58,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3316 states and 5118 transitions. [2021-11-21 01:08:58,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-21 01:08:58,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:58,589 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:58,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 01:08:58,590 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:58,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:58,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1635534985, now seen corresponding path program 1 times [2021-11-21 01:08:58,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:58,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647926218] [2021-11-21 01:08:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:58,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:58,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:08:59,013 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:59,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647926218] [2021-11-21 01:08:59,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647926218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:08:59,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391287534] [2021-11-21 01:08:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:59,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:08:59,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:08:59,019 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:08:59,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbb2f35d-c5de-44a1-a049-0673262d1a62/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:08:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:59,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-21 01:08:59,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:09:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:09:01,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:09:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:09:06,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391287534] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:09:06,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1047594590] [2021-11-21 01:09:06,739 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2021-11-21 01:09:06,740 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:09:06,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:09:06,750 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:09:06,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:09:07,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:09:07,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:09:07,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-21 01:09:08,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:08,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:08,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:08,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-21 01:09:09,070 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2021-11-21 01:09:20,027 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 262144 conjuctions. This might take some time...