./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d85020f-4656-4bb8-83bd-05f5d190f6c9/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d85020f-4656-4bb8-83bd-05f5d190f6c9/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d85020f-4656-4bb8-83bd-05f5d190f6c9/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d85020f-4656-4bb8-83bd-05f5d190f6c9/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d85020f-4656-4bb8-83bd-05f5d190f6c9/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d85020f-4656-4bb8-83bd-05f5d190f6c9/bin/utaipan-G1rejxKTta --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 6a855777f33fc48d84c4a45a2798e39789fc84161980bcc62efd5879691878c1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:23:08,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:23:08,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:23:08,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:23:08,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:23:08,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:23:08,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:23:08,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:23:08,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:23:08,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:23:08,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:23:08,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:23:08,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:23:08,789 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:23:08,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:23:08,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:23:08,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:23:08,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:23:08,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:23:08,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:23:08,808 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:23:08,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:23:08,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:23:08,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:23:08,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:23:08,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:23:08,821 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:23:08,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:23:08,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:23:08,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:23:08,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:23:08,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:23:08,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:23:08,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:23:08,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:23:08,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:23:08,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:23:08,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:23:08,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:23:08,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:23:08,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:23:08,834 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d85020f-4656-4bb8-83bd-05f5d190f6c9/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:23:08,862 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:23:08,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:23:08,862 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:23:08,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:23:08,863 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:23:08,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:23:08,864 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:23:08,864 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:23:08,864 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:23:08,865 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:23:08,865 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:23:08,865 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:23:08,865 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:23:08,866 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:23:08,866 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:23:08,866 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:23:08,866 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:23:08,867 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:23:08,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:23:08,876 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:23:08,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:23:08,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:23:08,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:23:08,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:23:08,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:23:08,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:23:08,877 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:23:08,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:23:08,878 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:23:08,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:23:08,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:23:08,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:23:08,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:23:08,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:23:08,879 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:23:08,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:23:08,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:23:08,880 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:23:08,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:23:08,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:23:08,880 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:23:08,881 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_0d85020f-4656-4bb8-83bd-05f5d190f6c9/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d85020f-4656-4bb8-83bd-05f5d190f6c9/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a855777f33fc48d84c4a45a2798e39789fc84161980bcc62efd5879691878c1 [2022-10-17 17:23:09,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:23:09,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:23:09,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:23:09,198 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:23:09,199 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:23:09,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d85020f-4656-4bb8-83bd-05f5d190f6c9/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-10-17 17:23:09,290 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d85020f-4656-4bb8-83bd-05f5d190f6c9/bin/utaipan-G1rejxKTta/data/1982e9332/298893b1f3d84e6a9652d0e75185f9de/FLAG6b84501d8 [2022-10-17 17:23:09,853 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:23:09,856 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d85020f-4656-4bb8-83bd-05f5d190f6c9/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-10-17 17:23:09,883 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d85020f-4656-4bb8-83bd-05f5d190f6c9/bin/utaipan-G1rejxKTta/data/1982e9332/298893b1f3d84e6a9652d0e75185f9de/FLAG6b84501d8 [2022-10-17 17:23:10,129 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d85020f-4656-4bb8-83bd-05f5d190f6c9/bin/utaipan-G1rejxKTta/data/1982e9332/298893b1f3d84e6a9652d0e75185f9de [2022-10-17 17:23:10,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:23:10,133 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:23:10,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:23:10,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:23:10,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:23:10,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:23:10" (1/1) ... [2022-10-17 17:23:10,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e97adf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:10, skipping insertion in model container [2022-10-17 17:23:10,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:23:10" (1/1) ... [2022-10-17 17:23:10,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:23:10,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:23:10,514 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d85020f-4656-4bb8-83bd-05f5d190f6c9/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7401,7414] [2022-10-17 17:23:10,579 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:23:10,593 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:23:10,640 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d85020f-4656-4bb8-83bd-05f5d190f6c9/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7401,7414] [2022-10-17 17:23:10,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:23:10,724 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:23:10,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:10 WrapperNode [2022-10-17 17:23:10,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:23:10,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:23:10,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:23:10,728 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:23:10,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:10" (1/1) ... [2022-10-17 17:23:10,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:10" (1/1) ... [2022-10-17 17:23:10,815 INFO L138 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 620 [2022-10-17 17:23:10,815 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:23:10,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:23:10,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:23:10,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:23:10,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:10" (1/1) ... [2022-10-17 17:23:10,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:10" (1/1) ... [2022-10-17 17:23:10,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:10" (1/1) ... [2022-10-17 17:23:10,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:10" (1/1) ... [2022-10-17 17:23:10,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:10" (1/1) ... [2022-10-17 17:23:10,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:10" (1/1) ... [2022-10-17 17:23:10,856 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:10" (1/1) ... [2022-10-17 17:23:10,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:10" (1/1) ... [2022-10-17 17:23:10,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:23:10,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:23:10,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:23:10,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:23:10,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:10" (1/1) ... [2022-10-17 17:23:10,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:23:10,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d85020f-4656-4bb8-83bd-05f5d190f6c9/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:10,908 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d85020f-4656-4bb8-83bd-05f5d190f6c9/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:23:10,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d85020f-4656-4bb8-83bd-05f5d190f6c9/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:23:10,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:23:10,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:23:10,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:23:10,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:23:11,166 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:23:11,168 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:23:11,874 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:23:12,092 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:23:12,092 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 17:23:12,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:23:12 BoogieIcfgContainer [2022-10-17 17:23:12,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:23:12,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:23:12,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:23:12,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:23:12,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:23:10" (1/3) ... [2022-10-17 17:23:12,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75eddb94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:23:12, skipping insertion in model container [2022-10-17 17:23:12,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:10" (2/3) ... [2022-10-17 17:23:12,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75eddb94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:23:12, skipping insertion in model container [2022-10-17 17:23:12,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:23:12" (3/3) ... [2022-10-17 17:23:12,107 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-10-17 17:23:12,126 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:23:12,127 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:23:12,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:23:12,223 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2e9976d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:23:12,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:23:12,231 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 125 states have (on average 1.688) internal successors, (211), 126 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-10-17 17:23:12,244 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:12,245 INFO L195 NwaCegarLoop]: 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] [2022-10-17 17:23:12,246 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:12,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:12,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1291372094, now seen corresponding path program 1 times [2022-10-17 17:23:12,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:12,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360134266] [2022-10-17 17:23:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:12,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:12,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:12,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360134266] [2022-10-17 17:23:12,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360134266] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:12,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:12,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:12,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252624354] [2022-10-17 17:23:12,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:12,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:12,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:12,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:12,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:12,937 INFO L87 Difference]: Start difference. First operand has 127 states, 125 states have (on average 1.688) internal successors, (211), 126 states have internal predecessors, (211), 0 states have call successors, (0), 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 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:13,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:13,123 INFO L93 Difference]: Finished difference Result 284 states and 446 transitions. [2022-10-17 17:23:13,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:13,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-10-17 17:23:13,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:13,138 INFO L225 Difference]: With dead ends: 284 [2022-10-17 17:23:13,138 INFO L226 Difference]: Without dead ends: 196 [2022-10-17 17:23:13,141 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:23:13,145 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 158 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:13,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 407 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:23:13,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-10-17 17:23:13,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2022-10-17 17:23:13,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.4093264248704662) internal successors, (272), 193 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:13,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 272 transitions. [2022-10-17 17:23:13,213 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 272 transitions. Word has length 58 [2022-10-17 17:23:13,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:13,214 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 272 transitions. [2022-10-17 17:23:13,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:13,214 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 272 transitions. [2022-10-17 17:23:13,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-10-17 17:23:13,217 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:13,252 INFO L195 NwaCegarLoop]: 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] [2022-10-17 17:23:13,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:23:13,252 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:13,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:13,254 INFO L85 PathProgramCache]: Analyzing trace with hash 381868271, now seen corresponding path program 1 times [2022-10-17 17:23:13,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:13,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031331003] [2022-10-17 17:23:13,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:13,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:13,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:13,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031331003] [2022-10-17 17:23:13,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031331003] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:13,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:13,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:13,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414397861] [2022-10-17 17:23:13,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:13,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:13,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:13,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:13,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:13,447 INFO L87 Difference]: Start difference. First operand 194 states and 272 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:13,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:13,575 INFO L93 Difference]: Finished difference Result 474 states and 696 transitions. [2022-10-17 17:23:13,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:13,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2022-10-17 17:23:13,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:13,583 INFO L225 Difference]: With dead ends: 474 [2022-10-17 17:23:13,583 INFO L226 Difference]: Without dead ends: 323 [2022-10-17 17:23:13,589 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:23:13,591 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 116 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:13,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 345 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:23:13,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-10-17 17:23:13,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 321. [2022-10-17 17:23:13,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.45) internal successors, (464), 320 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:13,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 464 transitions. [2022-10-17 17:23:13,665 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 464 transitions. Word has length 61 [2022-10-17 17:23:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:13,667 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 464 transitions. [2022-10-17 17:23:13,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:13,668 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 464 transitions. [2022-10-17 17:23:13,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-10-17 17:23:13,678 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:13,678 INFO L195 NwaCegarLoop]: 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] [2022-10-17 17:23:13,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:23:13,682 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:13,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:13,683 INFO L85 PathProgramCache]: Analyzing trace with hash 40937796, now seen corresponding path program 1 times [2022-10-17 17:23:13,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:13,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648807865] [2022-10-17 17:23:13,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:13,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:13,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:13,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648807865] [2022-10-17 17:23:13,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648807865] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:13,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:13,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:13,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208417941] [2022-10-17 17:23:13,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:13,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:13,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:13,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:13,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:13,899 INFO L87 Difference]: Start difference. First operand 321 states and 464 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) [2022-10-17 17:23:14,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:14,018 INFO L93 Difference]: Finished difference Result 833 states and 1238 transitions. [2022-10-17 17:23:14,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:14,019 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 [2022-10-17 17:23:14,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:14,024 INFO L225 Difference]: With dead ends: 833 [2022-10-17 17:23:14,024 INFO L226 Difference]: Without dead ends: 555 [2022-10-17 17:23:14,026 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:23:14,027 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 111 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:14,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 330 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:23:14,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-10-17 17:23:14,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 553. [2022-10-17 17:23:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.4710144927536233) internal successors, (812), 552 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 812 transitions. [2022-10-17 17:23:14,094 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 812 transitions. Word has length 64 [2022-10-17 17:23:14,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:14,095 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 812 transitions. [2022-10-17 17:23:14,095 INFO L496 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) [2022-10-17 17:23:14,095 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 812 transitions. [2022-10-17 17:23:14,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-10-17 17:23:14,096 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:14,097 INFO L195 NwaCegarLoop]: 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] [2022-10-17 17:23:14,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:23:14,097 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:14,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:14,098 INFO L85 PathProgramCache]: Analyzing trace with hash 409037512, now seen corresponding path program 1 times [2022-10-17 17:23:14,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:14,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399491769] [2022-10-17 17:23:14,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:14,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:14,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:14,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399491769] [2022-10-17 17:23:14,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399491769] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:14,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:14,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:14,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403167173] [2022-10-17 17:23:14,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:14,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:14,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:14,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:14,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:14,190 INFO L87 Difference]: Start difference. First operand 553 states and 812 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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) [2022-10-17 17:23:14,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:14,382 INFO L93 Difference]: Finished difference Result 1485 states and 2214 transitions. [2022-10-17 17:23:14,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:14,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 [2022-10-17 17:23:14,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:14,394 INFO L225 Difference]: With dead ends: 1485 [2022-10-17 17:23:14,394 INFO L226 Difference]: Without dead ends: 975 [2022-10-17 17:23:14,395 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:23:14,405 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 106 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:14,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 315 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:23:14,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-10-17 17:23:14,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 973. [2022-10-17 17:23:14,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 972 states have (on average 1.477366255144033) internal successors, (1436), 972 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1436 transitions. [2022-10-17 17:23:14,574 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1436 transitions. Word has length 67 [2022-10-17 17:23:14,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:14,576 INFO L495 AbstractCegarLoop]: Abstraction has 973 states and 1436 transitions. [2022-10-17 17:23:14,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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) [2022-10-17 17:23:14,577 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1436 transitions. [2022-10-17 17:23:14,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-10-17 17:23:14,579 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:14,579 INFO L195 NwaCegarLoop]: 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] [2022-10-17 17:23:14,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:23:14,580 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:14,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1680750051, now seen corresponding path program 1 times [2022-10-17 17:23:14,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:14,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578937144] [2022-10-17 17:23:14,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:14,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:14,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:14,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578937144] [2022-10-17 17:23:14,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578937144] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:14,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:14,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:14,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618775441] [2022-10-17 17:23:14,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:14,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:14,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:14,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:14,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:14,711 INFO L87 Difference]: Start difference. First operand 973 states and 1436 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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) [2022-10-17 17:23:15,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:15,075 INFO L93 Difference]: Finished difference Result 2657 states and 3950 transitions. [2022-10-17 17:23:15,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:15,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 [2022-10-17 17:23:15,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:15,087 INFO L225 Difference]: With dead ends: 2657 [2022-10-17 17:23:15,087 INFO L226 Difference]: Without dead ends: 1727 [2022-10-17 17:23:15,089 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:23:15,090 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 101 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:15,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 300 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:23:15,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-10-17 17:23:15,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1725. [2022-10-17 17:23:15,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 1.4733178654292343) internal successors, (2540), 1724 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:15,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2540 transitions. [2022-10-17 17:23:15,358 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2540 transitions. Word has length 70 [2022-10-17 17:23:15,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:15,358 INFO L495 AbstractCegarLoop]: Abstraction has 1725 states and 2540 transitions. [2022-10-17 17:23:15,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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) [2022-10-17 17:23:15,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2540 transitions. [2022-10-17 17:23:15,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-10-17 17:23:15,359 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:15,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:15,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:23:15,360 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:15,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:15,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1203841107, now seen corresponding path program 1 times [2022-10-17 17:23:15,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:15,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037517079] [2022-10-17 17:23:15,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:15,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:15,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:15,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037517079] [2022-10-17 17:23:15,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037517079] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:15,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:15,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:15,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635136099] [2022-10-17 17:23:15,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:15,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:15,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:15,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:15,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:15,436 INFO L87 Difference]: Start difference. First operand 1725 states and 2540 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:15,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:15,955 INFO L93 Difference]: Finished difference Result 4737 states and 6990 transitions. [2022-10-17 17:23:15,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:15,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2022-10-17 17:23:15,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:15,974 INFO L225 Difference]: With dead ends: 4737 [2022-10-17 17:23:15,975 INFO L226 Difference]: Without dead ends: 3055 [2022-10-17 17:23:15,978 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:23:15,979 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 96 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:15,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 285 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:23:15,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2022-10-17 17:23:16,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 3053. [2022-10-17 17:23:16,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 1.4613368283093053) internal successors, (4460), 3052 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:16,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 4460 transitions. [2022-10-17 17:23:16,451 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 4460 transitions. Word has length 73 [2022-10-17 17:23:16,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:16,451 INFO L495 AbstractCegarLoop]: Abstraction has 3053 states and 4460 transitions. [2022-10-17 17:23:16,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 4460 transitions. [2022-10-17 17:23:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-10-17 17:23:16,452 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:16,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:16,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:23:16,453 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:16,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:16,454 INFO L85 PathProgramCache]: Analyzing trace with hash 349706559, now seen corresponding path program 1 times [2022-10-17 17:23:16,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:16,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654436810] [2022-10-17 17:23:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:16,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:16,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:16,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654436810] [2022-10-17 17:23:16,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654436810] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:16,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:16,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 17:23:16,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989916127] [2022-10-17 17:23:16,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:16,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:23:16,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:16,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:23:16,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:23:16,790 INFO L87 Difference]: Start difference. First operand 3053 states and 4460 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:20,015 INFO L93 Difference]: Finished difference Result 18233 states and 26546 transitions. [2022-10-17 17:23:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:23:20,019 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2022-10-17 17:23:20,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:20,118 INFO L225 Difference]: With dead ends: 18233 [2022-10-17 17:23:20,119 INFO L226 Difference]: Without dead ends: 15223 [2022-10-17 17:23:20,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:23:20,127 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 635 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:20,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [635 Valid, 1109 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:23:20,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15223 states. [2022-10-17 17:23:22,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15223 to 15213. [2022-10-17 17:23:22,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15213 states, 15212 states have (on average 1.4522745201156981) internal successors, (22092), 15212 states have internal predecessors, (22092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15213 states to 15213 states and 22092 transitions. [2022-10-17 17:23:23,037 INFO L78 Accepts]: Start accepts. Automaton has 15213 states and 22092 transitions. Word has length 76 [2022-10-17 17:23:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:23,038 INFO L495 AbstractCegarLoop]: Abstraction has 15213 states and 22092 transitions. [2022-10-17 17:23:23,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 15213 states and 22092 transitions. [2022-10-17 17:23:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-10-17 17:23:23,040 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:23,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:23,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:23:23,040 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:23,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:23,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1702218856, now seen corresponding path program 1 times [2022-10-17 17:23:23,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:23,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880188116] [2022-10-17 17:23:23,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:23,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:23,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:23,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880188116] [2022-10-17 17:23:23,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880188116] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:23,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:23,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:23:23,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111791452] [2022-10-17 17:23:23,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:23,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:23:23,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:23,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:23:23,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:23:23,277 INFO L87 Difference]: Start difference. First operand 15213 states and 22092 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:27,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:27,290 INFO L93 Difference]: Finished difference Result 38947 states and 56768 transitions. [2022-10-17 17:23:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:23:27,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2022-10-17 17:23:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:27,371 INFO L225 Difference]: With dead ends: 38947 [2022-10-17 17:23:27,372 INFO L226 Difference]: Without dead ends: 23777 [2022-10-17 17:23:27,401 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:23:27,402 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 676 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:27,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 163 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:23:27,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23777 states. [2022-10-17 17:23:31,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23777 to 23775. [2022-10-17 17:23:31,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23775 states, 23774 states have (on average 1.4455287288634644) internal successors, (34366), 23774 states have internal predecessors, (34366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:31,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23775 states to 23775 states and 34366 transitions. [2022-10-17 17:23:31,565 INFO L78 Accepts]: Start accepts. Automaton has 23775 states and 34366 transitions. Word has length 78 [2022-10-17 17:23:31,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:31,565 INFO L495 AbstractCegarLoop]: Abstraction has 23775 states and 34366 transitions. [2022-10-17 17:23:31,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:31,566 INFO L276 IsEmpty]: Start isEmpty. Operand 23775 states and 34366 transitions. [2022-10-17 17:23:31,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-10-17 17:23:31,567 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:31,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:31,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 17:23:31,568 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:31,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:31,568 INFO L85 PathProgramCache]: Analyzing trace with hash -742634483, now seen corresponding path program 1 times [2022-10-17 17:23:31,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:31,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852824928] [2022-10-17 17:23:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:31,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:32,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:32,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852824928] [2022-10-17 17:23:32,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852824928] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:32,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:32,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-10-17 17:23:32,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500354084] [2022-10-17 17:23:32,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:32,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 17:23:32,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:32,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 17:23:32,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:23:32,191 INFO L87 Difference]: Start difference. First operand 23775 states and 34366 transitions. Second operand has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:40,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:40,877 INFO L93 Difference]: Finished difference Result 44764 states and 64937 transitions. [2022-10-17 17:23:40,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-17 17:23:40,878 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2022-10-17 17:23:40,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:41,023 INFO L225 Difference]: With dead ends: 44764 [2022-10-17 17:23:41,023 INFO L226 Difference]: Without dead ends: 44762 [2022-10-17 17:23:41,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2022-10-17 17:23:41,044 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 1700 mSDsluCounter, 3374 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1700 SdHoareTripleChecker+Valid, 3882 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:41,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1700 Valid, 3882 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:23:41,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44762 states.