./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1a76dc897aa0702a7581955a590e68a0e3d7c15bffbb5939a80772bf70ad5d7a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:30:30,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:30:30,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:30:30,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:30:30,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:30:30,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:30:30,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:30:30,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:30:30,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:30:30,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:30:30,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:30:30,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:30:30,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:30:30,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:30:30,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:30:30,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:30:30,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:30:30,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:30:30,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:30:30,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:30:30,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:30:30,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:30:30,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:30:30,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:30:30,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:30:30,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:30:30,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:30:30,825 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:30:30,826 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:30:30,827 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:30:30,827 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:30:30,828 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:30:30,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:30:30,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:30:30,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:30:30,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:30:30,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:30:30,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:30:30,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:30:30,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:30:30,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:30:30,836 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:30:30,864 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:30:30,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:30:30,865 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:30:30,865 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:30:30,866 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:30:30,866 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:30:30,866 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:30:30,866 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:30:30,867 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:30:30,867 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:30:30,867 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:30:30,867 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:30:30,867 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:30:30,868 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:30:30,868 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:30:30,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:30:30,869 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:30:30,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:30:30,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:30:30,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:30:30,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:30:30,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:30:30,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:30:30,870 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:30:30,870 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:30:30,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:30:30,871 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:30:30,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:30:30,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:30:30,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:30:30,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:30:30,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:30:30,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:30:30,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:30:30,873 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:30:30,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:30:30,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:30:30,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:30:30,873 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:30:30,874 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_62ec5267-b631-4c34-851a-6967f4dba77f/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a76dc897aa0702a7581955a590e68a0e3d7c15bffbb5939a80772bf70ad5d7a [2021-11-07 01:30:31,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:30:31,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:30:31,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:30:31,180 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:30:31,181 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:30:31,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2021-11-07 01:30:31,261 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/bin/utaipan-UUZaoUuFF8/data/2c3225569/1d79a827ddab45418f8ff0026fb09e33/FLAG561dc2cb2 [2021-11-07 01:30:31,956 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:30:31,956 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2021-11-07 01:30:31,984 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/bin/utaipan-UUZaoUuFF8/data/2c3225569/1d79a827ddab45418f8ff0026fb09e33/FLAG561dc2cb2 [2021-11-07 01:30:32,125 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/bin/utaipan-UUZaoUuFF8/data/2c3225569/1d79a827ddab45418f8ff0026fb09e33 [2021-11-07 01:30:32,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:30:32,132 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:30:32,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:30:32,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:30:32,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:30:32,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:32" (1/1) ... [2021-11-07 01:30:32,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66a89d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:32, skipping insertion in model container [2021-11-07 01:30:32,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:32" (1/1) ... [2021-11-07 01:30:32,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:30:32,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:30:32,569 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[10634,10647] [2021-11-07 01:30:32,723 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[25860,25873] [2021-11-07 01:30:32,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:30:33,001 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:30:33,078 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[10634,10647] [2021-11-07 01:30:33,212 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[25860,25873] [2021-11-07 01:30:33,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:30:33,536 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:30:33,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:33 WrapperNode [2021-11-07 01:30:33,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:30:33,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:30:33,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:30:33,538 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:30:33,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:33" (1/1) ... [2021-11-07 01:30:33,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:33" (1/1) ... [2021-11-07 01:30:33,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:30:33,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:30:33,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:30:33,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:30:33,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:33" (1/1) ... [2021-11-07 01:30:33,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:33" (1/1) ... [2021-11-07 01:30:33,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:33" (1/1) ... [2021-11-07 01:30:33,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:33" (1/1) ... [2021-11-07 01:30:33,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:33" (1/1) ... [2021-11-07 01:30:33,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:33" (1/1) ... [2021-11-07 01:30:33,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:33" (1/1) ... [2021-11-07 01:30:33,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:30:33,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:30:33,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:30:33,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:30:33,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:33" (1/1) ... [2021-11-07 01:30:33,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:30:33,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:30:33,949 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:30:33,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ec5267-b631-4c34-851a-6967f4dba77f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:30:33,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:30:33,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:30:33,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:30:33,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:30:36,758 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:30:36,758 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:30:36,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:36 BoogieIcfgContainer [2021-11-07 01:30:36,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:30:36,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:30:36,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:30:36,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:30:36,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:30:32" (1/3) ... [2021-11-07 01:30:36,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@477cd369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:30:36, skipping insertion in model container [2021-11-07 01:30:36,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:33" (2/3) ... [2021-11-07 01:30:36,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@477cd369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:30:36, skipping insertion in model container [2021-11-07 01:30:36,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:36" (3/3) ... [2021-11-07 01:30:36,778 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2021-11-07 01:30:36,790 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:30:36,790 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:30:36,861 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:30:36,875 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:30:36,875 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:30:36,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 666 states, 663 states have (on average 1.7873303167420815) internal successors, (1185), 665 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:36,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:30:36,950 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:36,951 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:36,951 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:36,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:36,959 INFO L85 PathProgramCache]: Analyzing trace with hash 354198095, now seen corresponding path program 1 times [2021-11-07 01:30:36,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:30:36,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667796862] [2021-11-07 01:30:36,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:36,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:30:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:37,408 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:30:37,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667796862] [2021-11-07 01:30:37,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667796862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:37,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:37,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:30:37,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650226329] [2021-11-07 01:30:37,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:37,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:30:37,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:37,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:37,433 INFO L87 Difference]: Start difference. First operand has 666 states, 663 states have (on average 1.7873303167420815) internal successors, (1185), 665 states have internal predecessors, (1185), 0 states have call successors, (0), 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 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:37,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:37,575 INFO L93 Difference]: Finished difference Result 969 states and 1683 transitions. [2021-11-07 01:30:37,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:37,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-11-07 01:30:37,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:37,598 INFO L225 Difference]: With dead ends: 969 [2021-11-07 01:30:37,598 INFO L226 Difference]: Without dead ends: 786 [2021-11-07 01:30:37,602 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:37,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-11-07 01:30:37,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 784. [2021-11-07 01:30:37,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 782 states have (on average 1.340153452685422) internal successors, (1048), 783 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:37,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1048 transitions. [2021-11-07 01:30:37,695 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1048 transitions. Word has length 62 [2021-11-07 01:30:37,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:37,696 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 1048 transitions. [2021-11-07 01:30:37,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:37,697 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1048 transitions. [2021-11-07 01:30:37,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:30:37,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:37,702 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:37,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:30:37,703 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:37,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:37,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1907491894, now seen corresponding path program 1 times [2021-11-07 01:30:37,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:30:37,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108561244] [2021-11-07 01:30:37,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:37,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:30:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:37,879 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:30:37,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108561244] [2021-11-07 01:30:37,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108561244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:37,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:37,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:30:37,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894905970] [2021-11-07 01:30:37,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:37,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:30:37,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:37,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:37,883 INFO L87 Difference]: Start difference. First operand 784 states and 1048 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:38,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:38,078 INFO L93 Difference]: Finished difference Result 1309 states and 1745 transitions. [2021-11-07 01:30:38,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:38,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-07 01:30:38,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:38,088 INFO L225 Difference]: With dead ends: 1309 [2021-11-07 01:30:38,088 INFO L226 Difference]: Without dead ends: 1120 [2021-11-07 01:30:38,093 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:38,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-11-07 01:30:38,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1116. [2021-11-07 01:30:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1114 states have (on average 1.3204667863554758) internal successors, (1471), 1115 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:38,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1471 transitions. [2021-11-07 01:30:38,157 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1471 transitions. Word has length 63 [2021-11-07 01:30:38,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:38,158 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 1471 transitions. [2021-11-07 01:30:38,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:38,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1471 transitions. [2021-11-07 01:30:38,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:30:38,165 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:38,165 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:38,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:30:38,167 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:38,172 INFO L85 PathProgramCache]: Analyzing trace with hash -715190064, now seen corresponding path program 1 times [2021-11-07 01:30:38,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:30:38,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10645950] [2021-11-07 01:30:38,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:38,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:30:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:38,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:38,292 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:30:38,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10645950] [2021-11-07 01:30:38,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10645950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:38,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:38,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:30:38,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728278853] [2021-11-07 01:30:38,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:30:38,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:30:38,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:30:38,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:30:38,295 INFO L87 Difference]: Start difference. First operand 1116 states and 1471 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:39,040 INFO L93 Difference]: Finished difference Result 2179 states and 2938 transitions. [2021-11-07 01:30:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:30:39,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-07 01:30:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:39,049 INFO L225 Difference]: With dead ends: 2179 [2021-11-07 01:30:39,049 INFO L226 Difference]: Without dead ends: 1287 [2021-11-07 01:30:39,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:30:39,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-11-07 01:30:39,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1285. [2021-11-07 01:30:39,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1283 states have (on average 1.3468433359314107) internal successors, (1728), 1284 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1728 transitions. [2021-11-07 01:30:39,131 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1728 transitions. Word has length 63 [2021-11-07 01:30:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:39,132 INFO L470 AbstractCegarLoop]: Abstraction has 1285 states and 1728 transitions. [2021-11-07 01:30:39,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1728 transitions. [2021-11-07 01:30:39,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:30:39,136 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:39,136 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:39,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:30:39,136 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:39,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:39,137 INFO L85 PathProgramCache]: Analyzing trace with hash -366683150, now seen corresponding path program 1 times [2021-11-07 01:30:39,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:30:39,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111079330] [2021-11-07 01:30:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:39,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:30:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:39,209 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:30:39,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111079330] [2021-11-07 01:30:39,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111079330] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:39,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:39,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:30:39,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031165170] [2021-11-07 01:30:39,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:39,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:30:39,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:39,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:39,212 INFO L87 Difference]: Start difference. First operand 1285 states and 1728 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:39,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:39,344 INFO L93 Difference]: Finished difference Result 2656 states and 3627 transitions. [2021-11-07 01:30:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:39,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-07 01:30:39,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:39,357 INFO L225 Difference]: With dead ends: 2656 [2021-11-07 01:30:39,357 INFO L226 Difference]: Without dead ends: 1976 [2021-11-07 01:30:39,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:39,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-11-07 01:30:39,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1974. [2021-11-07 01:30:39,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1972 states have (on average 1.3443204868154157) internal successors, (2651), 1973 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:39,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 2651 transitions. [2021-11-07 01:30:39,532 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 2651 transitions. Word has length 64 [2021-11-07 01:30:39,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:39,536 INFO L470 AbstractCegarLoop]: Abstraction has 1974 states and 2651 transitions. [2021-11-07 01:30:39,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:39,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 2651 transitions. [2021-11-07 01:30:39,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:30:39,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:39,542 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:39,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:30:39,542 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:39,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:39,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1303921466, now seen corresponding path program 1 times [2021-11-07 01:30:39,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:30:39,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925397742] [2021-11-07 01:30:39,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:39,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:30:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:39,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:30:39,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925397742] [2021-11-07 01:30:39,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925397742] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:39,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:39,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:30:39,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140838314] [2021-11-07 01:30:39,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:39,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:30:39,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:39,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:39,643 INFO L87 Difference]: Start difference. First operand 1974 states and 2651 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:39,848 INFO L93 Difference]: Finished difference Result 4165 states and 5661 transitions. [2021-11-07 01:30:39,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:39,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-07 01:30:39,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:39,866 INFO L225 Difference]: With dead ends: 4165 [2021-11-07 01:30:39,867 INFO L226 Difference]: Without dead ends: 2975 [2021-11-07 01:30:39,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:39,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2021-11-07 01:30:40,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2971. [2021-11-07 01:30:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2971 states, 2969 states have (on average 1.3391714381946784) internal successors, (3976), 2970 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:40,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2971 states to 2971 states and 3976 transitions. [2021-11-07 01:30:40,097 INFO L78 Accepts]: Start accepts. Automaton has 2971 states and 3976 transitions. Word has length 65 [2021-11-07 01:30:40,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:40,098 INFO L470 AbstractCegarLoop]: Abstraction has 2971 states and 3976 transitions. [2021-11-07 01:30:40,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:40,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2971 states and 3976 transitions. [2021-11-07 01:30:40,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:30:40,103 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:40,103 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:40,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:30:40,104 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:40,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:40,105 INFO L85 PathProgramCache]: Analyzing trace with hash -118541293, now seen corresponding path program 1 times [2021-11-07 01:30:40,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:30:40,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271052533] [2021-11-07 01:30:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:40,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:30:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:40,183 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:30:40,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271052533] [2021-11-07 01:30:40,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271052533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:40,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:40,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:30:40,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671624923] [2021-11-07 01:30:40,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:30:40,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:30:40,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:30:40,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:30:40,186 INFO L87 Difference]: Start difference. First operand 2971 states and 3976 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:40,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:40,936 INFO L93 Difference]: Finished difference Result 6973 states and 9421 transitions. [2021-11-07 01:30:40,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:30:40,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-07 01:30:40,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:40,961 INFO L225 Difference]: With dead ends: 6973 [2021-11-07 01:30:40,961 INFO L226 Difference]: Without dead ends: 4336 [2021-11-07 01:30:40,966 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:30:40,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2021-11-07 01:30:41,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 4332. [2021-11-07 01:30:41,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4332 states, 4330 states have (on average 1.3420323325635104) internal successors, (5811), 4331 states have internal predecessors, (5811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:41,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4332 states to 4332 states and 5811 transitions. [2021-11-07 01:30:41,313 INFO L78 Accepts]: Start accepts. Automaton has 4332 states and 5811 transitions. Word has length 65 [2021-11-07 01:30:41,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:41,313 INFO L470 AbstractCegarLoop]: Abstraction has 4332 states and 5811 transitions. [2021-11-07 01:30:41,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:41,314 INFO L276 IsEmpty]: Start isEmpty. Operand 4332 states and 5811 transitions. [2021-11-07 01:30:41,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:30:41,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:41,320 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:41,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:30:41,321 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:41,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:41,322 INFO L85 PathProgramCache]: Analyzing trace with hash -169263787, now seen corresponding path program 1 times [2021-11-07 01:30:41,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:30:41,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778492475] [2021-11-07 01:30:41,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:41,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:30:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:41,434 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:30:41,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778492475] [2021-11-07 01:30:41,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778492475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:41,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:41,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:30:41,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469954406] [2021-11-07 01:30:41,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:30:41,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:30:41,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:30:41,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:30:41,437 INFO L87 Difference]: Start difference. First operand 4332 states and 5811 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:43,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:43,360 INFO L93 Difference]: Finished difference Result 16471 states and 22596 transitions. [2021-11-07 01:30:43,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:30:43,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-07 01:30:43,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:43,469 INFO L225 Difference]: With dead ends: 16471 [2021-11-07 01:30:43,469 INFO L226 Difference]: Without dead ends: 15100 [2021-11-07 01:30:43,479 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:30:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15100 states. [2021-11-07 01:30:44,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15100 to 4356. [2021-11-07 01:30:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4356 states, 4354 states have (on average 1.3419843821773083) internal successors, (5843), 4355 states have internal predecessors, (5843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4356 states to 4356 states and 5843 transitions. [2021-11-07 01:30:44,052 INFO L78 Accepts]: Start accepts. Automaton has 4356 states and 5843 transitions. Word has length 66 [2021-11-07 01:30:44,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:44,053 INFO L470 AbstractCegarLoop]: Abstraction has 4356 states and 5843 transitions. [2021-11-07 01:30:44,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 4356 states and 5843 transitions. [2021-11-07 01:30:44,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:30:44,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:44,060 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:44,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:30:44,061 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:44,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:44,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1484472013, now seen corresponding path program 1 times [2021-11-07 01:30:44,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:30:44,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063273871] [2021-11-07 01:30:44,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:44,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:30:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:44,135 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:30:44,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063273871] [2021-11-07 01:30:44,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063273871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:44,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:44,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:30:44,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794271562] [2021-11-07 01:30:44,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:30:44,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:30:44,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:30:44,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:30:44,138 INFO L87 Difference]: Start difference. First operand 4356 states and 5843 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:45,309 INFO L93 Difference]: Finished difference Result 11231 states and 15172 transitions. [2021-11-07 01:30:45,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:30:45,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-07 01:30:45,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:45,327 INFO L225 Difference]: With dead ends: 11231 [2021-11-07 01:30:45,327 INFO L226 Difference]: Without dead ends: 7184 [2021-11-07 01:30:45,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:30:45,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7184 states. [2021-11-07 01:30:45,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7184 to 5652. [2021-11-07 01:30:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5652 states, 5650 states have (on average 1.3483185840707965) internal successors, (7618), 5651 states have internal predecessors, (7618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:45,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5652 states to 5652 states and 7618 transitions. [2021-11-07 01:30:45,970 INFO L78 Accepts]: Start accepts. Automaton has 5652 states and 7618 transitions. Word has length 66 [2021-11-07 01:30:45,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:45,970 INFO L470 AbstractCegarLoop]: Abstraction has 5652 states and 7618 transitions. [2021-11-07 01:30:45,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:45,971 INFO L276 IsEmpty]: Start isEmpty. Operand 5652 states and 7618 transitions. [2021-11-07 01:30:45,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:30:45,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:45,976 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:45,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:30:45,977 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:45,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:45,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1411280257, now seen corresponding path program 1 times [2021-11-07 01:30:45,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:30:45,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111115176] [2021-11-07 01:30:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:45,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:30:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:46,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:30:46,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111115176] [2021-11-07 01:30:46,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111115176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:46,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:46,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:30:46,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773990363] [2021-11-07 01:30:46,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:30:46,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:30:46,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:30:46,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:30:46,049 INFO L87 Difference]: Start difference. First operand 5652 states and 7618 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:47,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:47,319 INFO L93 Difference]: Finished difference Result 14963 states and 20215 transitions. [2021-11-07 01:30:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:30:47,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-07 01:30:47,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:47,345 INFO L225 Difference]: With dead ends: 14963 [2021-11-07 01:30:47,345 INFO L226 Difference]: Without dead ends: 9591 [2021-11-07 01:30:47,356 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:30:47,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9591 states. [2021-11-07 01:30:48,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9591 to 9587. [2021-11-07 01:30:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9587 states, 9585 states have (on average 1.3387584767866458) internal successors, (12832), 9586 states have internal predecessors, (12832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:48,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9587 states to 9587 states and 12832 transitions. [2021-11-07 01:30:48,244 INFO L78 Accepts]: Start accepts. Automaton has 9587 states and 12832 transitions. Word has length 67 [2021-11-07 01:30:48,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:48,244 INFO L470 AbstractCegarLoop]: Abstraction has 9587 states and 12832 transitions. [2021-11-07 01:30:48,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:48,245 INFO L276 IsEmpty]: Start isEmpty. Operand 9587 states and 12832 transitions. [2021-11-07 01:30:48,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:30:48,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:48,251 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:48,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:30:48,252 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:48,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:48,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1696216302, now seen corresponding path program 1 times [2021-11-07 01:30:48,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:30:48,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815731746] [2021-11-07 01:30:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:48,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:30:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:48,331 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:30:48,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815731746] [2021-11-07 01:30:48,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815731746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:48,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:48,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:30:48,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429227063] [2021-11-07 01:30:48,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:30:48,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:30:48,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:30:48,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:30:48,334 INFO L87 Difference]: Start difference. First operand 9587 states and 12832 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:52,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:52,126 INFO L93 Difference]: Finished difference Result 37860 states and 50655 transitions. [2021-11-07 01:30:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:30:52,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-07 01:30:52,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:52,221 INFO L225 Difference]: With dead ends: 37860 [2021-11-07 01:30:52,221 INFO L226 Difference]: Without dead ends: 33575 [2021-11-07 01:30:52,234 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:30:52,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33575 states. [2021-11-07 01:30:53,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33575 to 9615. [2021-11-07 01:30:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9615 states, 9613 states have (on average 1.338603973785499) internal successors, (12868), 9614 states have internal predecessors, (12868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9615 states to 9615 states and 12868 transitions. [2021-11-07 01:30:53,535 INFO L78 Accepts]: Start accepts. Automaton has 9615 states and 12868 transitions. Word has length 67 [2021-11-07 01:30:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:53,536 INFO L470 AbstractCegarLoop]: Abstraction has 9615 states and 12868 transitions. [2021-11-07 01:30:53,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:53,537 INFO L276 IsEmpty]: Start isEmpty. Operand 9615 states and 12868 transitions. [2021-11-07 01:30:53,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:30:53,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:53,543 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:53,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:30:53,544 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:53,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:53,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1850748370, now seen corresponding path program 1 times [2021-11-07 01:30:53,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:30:53,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521502253] [2021-11-07 01:30:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:53,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:30:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:53,631 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:30:53,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521502253] [2021-11-07 01:30:53,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521502253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:53,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:53,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:30:53,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397281177] [2021-11-07 01:30:53,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:30:53,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:30:53,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:30:53,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:30:53,633 INFO L87 Difference]: Start difference. First operand 9615 states and 12868 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:59,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:59,229 INFO L93 Difference]: Finished difference Result 46133 states and 62477 transitions. [2021-11-07 01:30:59,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:30:59,229 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-07 01:30:59,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:59,332 INFO L225 Difference]: With dead ends: 46133 [2021-11-07 01:30:59,333 INFO L226 Difference]: Without dead ends: 42123 [2021-11-07 01:30:59,347 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:30:59,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42123 states. [2021-11-07 01:31:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42123 to 9712. [2021-11-07 01:31:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9712 states, 9710 states have (on average 1.3385169927909373) internal successors, (12997), 9711 states have internal predecessors, (12997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9712 states to 9712 states and 12997 transitions. [2021-11-07 01:31:00,677 INFO L78 Accepts]: Start accepts. Automaton has 9712 states and 12997 transitions. Word has length 68 [2021-11-07 01:31:00,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:00,677 INFO L470 AbstractCegarLoop]: Abstraction has 9712 states and 12997 transitions. [2021-11-07 01:31:00,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:00,677 INFO L276 IsEmpty]: Start isEmpty. Operand 9712 states and 12997 transitions. [2021-11-07 01:31:00,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:31:00,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:00,685 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:00,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 01:31:00,686 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:00,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:00,687 INFO L85 PathProgramCache]: Analyzing trace with hash -258674765, now seen corresponding path program 1 times [2021-11-07 01:31:00,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:31:00,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326378211] [2021-11-07 01:31:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:00,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:31:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:00,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:31:00,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326378211] [2021-11-07 01:31:00,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326378211] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:00,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:00,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 01:31:00,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516311921] [2021-11-07 01:31:00,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:31:00,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:31:00,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:31:00,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:31:00,908 INFO L87 Difference]: Start difference. First operand 9712 states and 12997 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:06,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:06,935 INFO L93 Difference]: Finished difference Result 33163 states and 44103 transitions. [2021-11-07 01:31:06,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 01:31:06,935 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-07 01:31:06,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:07,003 INFO L225 Difference]: With dead ends: 33163 [2021-11-07 01:31:07,004 INFO L226 Difference]: Without dead ends: 30640 [2021-11-07 01:31:07,020 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-11-07 01:31:07,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30640 states. [2021-11-07 01:31:08,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30640 to 9712. [2021-11-07 01:31:08,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9712 states, 9710 states have (on average 1.3383110195674561) internal successors, (12995), 9711 states have internal predecessors, (12995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:08,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9712 states to 9712 states and 12995 transitions. [2021-11-07 01:31:08,681 INFO L78 Accepts]: Start accepts. Automaton has 9712 states and 12995 transitions. Word has length 69 [2021-11-07 01:31:08,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:08,681 INFO L470 AbstractCegarLoop]: Abstraction has 9712 states and 12995 transitions. [2021-11-07 01:31:08,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:08,681 INFO L276 IsEmpty]: Start isEmpty. Operand 9712 states and 12995 transitions. [2021-11-07 01:31:08,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:31:08,689 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:08,689 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:08,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 01:31:08,690 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:08,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:08,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1238363246, now seen corresponding path program 1 times [2021-11-07 01:31:08,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:31:08,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791659643] [2021-11-07 01:31:08,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:08,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:31:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:08,804 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:31:08,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791659643] [2021-11-07 01:31:08,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791659643] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:08,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:08,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:31:08,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642290429] [2021-11-07 01:31:08,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:31:08,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:31:08,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:31:08,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:31:08,807 INFO L87 Difference]: Start difference. First operand 9712 states and 12995 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:13,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:13,157 INFO L93 Difference]: Finished difference Result 29566 states and 39659 transitions. [2021-11-07 01:31:13,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:31:13,158 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-07 01:31:13,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:13,188 INFO L225 Difference]: With dead ends: 29566 [2021-11-07 01:31:13,188 INFO L226 Difference]: Without dead ends: 22036 [2021-11-07 01:31:13,200 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:31:13,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22036 states. [2021-11-07 01:31:14,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22036 to 9708. [2021-11-07 01:31:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9708 states, 9706 states have (on average 1.33803832680816) internal successors, (12987), 9707 states have internal predecessors, (12987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:14,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9708 states to 9708 states and 12987 transitions. [2021-11-07 01:31:14,615 INFO L78 Accepts]: Start accepts. Automaton has 9708 states and 12987 transitions. Word has length 69 [2021-11-07 01:31:14,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:14,615 INFO L470 AbstractCegarLoop]: Abstraction has 9708 states and 12987 transitions. [2021-11-07 01:31:14,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:14,615 INFO L276 IsEmpty]: Start isEmpty. Operand 9708 states and 12987 transitions. [2021-11-07 01:31:14,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:31:14,624 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:14,624 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:14,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 01:31:14,624 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:14,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:14,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1327890955, now seen corresponding path program 1 times [2021-11-07 01:31:14,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:31:14,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022431996] [2021-11-07 01:31:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:14,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:31:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:14,928 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:31:14,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022431996] [2021-11-07 01:31:14,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022431996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:14,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:14,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 01:31:14,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428579081] [2021-11-07 01:31:14,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:31:14,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:31:14,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:31:14,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:31:14,930 INFO L87 Difference]: Start difference. First operand 9708 states and 12987 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:21,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:21,565 INFO L93 Difference]: Finished difference Result 44526 states and 60103 transitions. [2021-11-07 01:31:21,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:31:21,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-07 01:31:21,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:21,622 INFO L225 Difference]: With dead ends: 44526 [2021-11-07 01:31:21,622 INFO L226 Difference]: Without dead ends: 36872 [2021-11-07 01:31:21,636 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:31:21,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36872 states. [2021-11-07 01:31:23,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36872 to 9568. [2021-11-07 01:31:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9568 states, 9566 states have (on average 1.3385950240434874) internal successors, (12805), 9567 states have internal predecessors, (12805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9568 states to 9568 states and 12805 transitions. [2021-11-07 01:31:23,352 INFO L78 Accepts]: Start accepts. Automaton has 9568 states and 12805 transitions. Word has length 70 [2021-11-07 01:31:23,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:23,352 INFO L470 AbstractCegarLoop]: Abstraction has 9568 states and 12805 transitions. [2021-11-07 01:31:23,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:23,353 INFO L276 IsEmpty]: Start isEmpty. Operand 9568 states and 12805 transitions. [2021-11-07 01:31:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:31:23,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:23,360 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:23,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 01:31:23,361 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:23,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:23,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1786596526, now seen corresponding path program 1 times [2021-11-07 01:31:23,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:31:23,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627511093] [2021-11-07 01:31:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:23,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:31:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:23,481 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:31:23,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627511093] [2021-11-07 01:31:23,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627511093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:23,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:23,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:31:23,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372600518] [2021-11-07 01:31:23,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:31:23,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:31:23,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:31:23,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:31:23,483 INFO L87 Difference]: Start difference. First operand 9568 states and 12805 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:29,174 INFO L93 Difference]: Finished difference Result 31436 states and 42180 transitions. [2021-11-07 01:31:29,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:31:29,174 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-07 01:31:29,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:29,203 INFO L225 Difference]: With dead ends: 31436 [2021-11-07 01:31:29,204 INFO L226 Difference]: Without dead ends: 23872 [2021-11-07 01:31:29,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:31:29,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23872 states. [2021-11-07 01:31:30,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23872 to 9548. [2021-11-07 01:31:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9548 states, 9546 states have (on average 1.3380473496752567) internal successors, (12773), 9547 states have internal predecessors, (12773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9548 states to 9548 states and 12773 transitions. [2021-11-07 01:31:30,966 INFO L78 Accepts]: Start accepts. Automaton has 9548 states and 12773 transitions. Word has length 70 [2021-11-07 01:31:30,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:30,966 INFO L470 AbstractCegarLoop]: Abstraction has 9548 states and 12773 transitions. [2021-11-07 01:31:30,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:30,967 INFO L276 IsEmpty]: Start isEmpty. Operand 9548 states and 12773 transitions. [2021-11-07 01:31:30,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:31:30,973 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:30,973 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:30,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 01:31:30,973 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:30,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:30,974 INFO L85 PathProgramCache]: Analyzing trace with hash -926620498, now seen corresponding path program 1 times [2021-11-07 01:31:30,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:31:30,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973294224] [2021-11-07 01:31:30,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:30,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:31:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:31,371 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:31:31,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973294224] [2021-11-07 01:31:31,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973294224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:31,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:31,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-07 01:31:31,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282141280] [2021-11-07 01:31:31,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:31:31,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:31:31,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:31:31,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:31:31,373 INFO L87 Difference]: Start difference. First operand 9548 states and 12773 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:51,447 INFO L93 Difference]: Finished difference Result 78628 states and 105699 transitions. [2021-11-07 01:31:51,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 01:31:51,448 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-07 01:31:51,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:51,574 INFO L225 Difference]: With dead ends: 78628 [2021-11-07 01:31:51,574 INFO L226 Difference]: Without dead ends: 70900 [2021-11-07 01:31:51,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=429, Invalid=1551, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 01:31:51,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70900 states. [2021-11-07 01:31:54,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70900 to 9338. [2021-11-07 01:31:54,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9338 states, 9336 states have (on average 1.338796058269066) internal successors, (12499), 9337 states have internal predecessors, (12499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:54,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9338 states to 9338 states and 12499 transitions. [2021-11-07 01:31:54,758 INFO L78 Accepts]: Start accepts. Automaton has 9338 states and 12499 transitions. Word has length 70 [2021-11-07 01:31:54,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:54,758 INFO L470 AbstractCegarLoop]: Abstraction has 9338 states and 12499 transitions. [2021-11-07 01:31:54,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:54,759 INFO L276 IsEmpty]: Start isEmpty. Operand 9338 states and 12499 transitions. [2021-11-07 01:31:54,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:31:54,774 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:54,774 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:54,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 01:31:54,774 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:54,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:54,775 INFO L85 PathProgramCache]: Analyzing trace with hash -869291000, now seen corresponding path program 1 times [2021-11-07 01:31:54,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:31:54,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889382993] [2021-11-07 01:31:54,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:54,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:31:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:54,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:31:54,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889382993] [2021-11-07 01:31:54,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889382993] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:54,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:54,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:31:54,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919043851] [2021-11-07 01:31:54,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:31:54,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:31:54,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:31:54,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:31:54,870 INFO L87 Difference]: Start difference. First operand 9338 states and 12499 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:07,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:07,331 INFO L93 Difference]: Finished difference Result 40678 states and 54828 transitions. [2021-11-07 01:32:07,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:32:07,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-07 01:32:07,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:07,390 INFO L225 Difference]: With dead ends: 40678 [2021-11-07 01:32:07,391 INFO L226 Difference]: Without dead ends: 36832 [2021-11-07 01:32:07,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:32:07,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36832 states. [2021-11-07 01:32:10,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36832 to 9409. [2021-11-07 01:32:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9409 states, 9407 states have (on average 1.3392154778356542) internal successors, (12598), 9408 states have internal predecessors, (12598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:10,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9409 states to 9409 states and 12598 transitions. [2021-11-07 01:32:10,668 INFO L78 Accepts]: Start accepts. Automaton has 9409 states and 12598 transitions. Word has length 70 [2021-11-07 01:32:10,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:10,668 INFO L470 AbstractCegarLoop]: Abstraction has 9409 states and 12598 transitions. [2021-11-07 01:32:10,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:10,669 INFO L276 IsEmpty]: Start isEmpty. Operand 9409 states and 12598 transitions. [2021-11-07 01:32:10,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:32:10,677 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:10,677 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:10,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 01:32:10,677 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:32:10,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:10,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1664399330, now seen corresponding path program 1 times [2021-11-07 01:32:10,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:32:10,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951246879] [2021-11-07 01:32:10,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:10,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:32:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:11,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:32:11,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951246879] [2021-11-07 01:32:11,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951246879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:11,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:11,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-07 01:32:11,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070873859] [2021-11-07 01:32:11,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:32:11,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:32:11,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:32:11,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:32:11,192 INFO L87 Difference]: Start difference. First operand 9409 states and 12598 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:36,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:36,727 INFO L93 Difference]: Finished difference Result 69304 states and 93241 transitions. [2021-11-07 01:32:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 01:32:36,727 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-11-07 01:32:36,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:36,840 INFO L225 Difference]: With dead ends: 69304 [2021-11-07 01:32:36,840 INFO L226 Difference]: Without dead ends: 61718 [2021-11-07 01:32:36,856 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 01:32:36,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61718 states. [2021-11-07 01:32:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61718 to 9345. [2021-11-07 01:32:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9345 states, 9344 states have (on average 1.3383989726027397) internal successors, (12506), 9344 states have internal predecessors, (12506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:40,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9345 states to 9345 states and 12506 transitions. [2021-11-07 01:32:40,348 INFO L78 Accepts]: Start accepts. Automaton has 9345 states and 12506 transitions. Word has length 71 [2021-11-07 01:32:40,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:40,348 INFO L470 AbstractCegarLoop]: Abstraction has 9345 states and 12506 transitions. [2021-11-07 01:32:40,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:40,348 INFO L276 IsEmpty]: Start isEmpty. Operand 9345 states and 12506 transitions. [2021-11-07 01:32:40,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:32:40,352 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:40,352 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:40,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 01:32:40,353 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:32:40,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:40,353 INFO L85 PathProgramCache]: Analyzing trace with hash -70988118, now seen corresponding path program 1 times [2021-11-07 01:32:40,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:32:40,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883162338] [2021-11-07 01:32:40,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:40,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:32:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:40,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:32:40,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883162338] [2021-11-07 01:32:40,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883162338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:40,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:40,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 01:32:40,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519541008] [2021-11-07 01:32:40,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:32:40,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:32:40,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:32:40,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:32:40,508 INFO L87 Difference]: Start difference. First operand 9345 states and 12506 transitions. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)