./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c3928a-f7da-4344-91a7-513a3330402c/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c3928a-f7da-4344-91a7-513a3330402c/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c3928a-f7da-4344-91a7-513a3330402c/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c3928a-f7da-4344-91a7-513a3330402c/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c3928a-f7da-4344-91a7-513a3330402c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c3928a-f7da-4344-91a7-513a3330402c/bin/utaipan-gh47qXpMRh --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 3f65c5712bd883a6886a8bc01d4e0133fd034d0de7d6cdf4a43830b50c44bd44 --- 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-2329fc7 [2022-12-14 06:02:17,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:02:17,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:02:17,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:02:17,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:02:17,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:02:17,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:02:17,653 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:02:17,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:02:17,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:02:17,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:02:17,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:02:17,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:02:17,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:02:17,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:02:17,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:02:17,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:02:17,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:02:17,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:02:17,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:02:17,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:02:17,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:02:17,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:02:17,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:02:17,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:02:17,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:02:17,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:02:17,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:02:17,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:02:17,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:02:17,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:02:17,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:02:17,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:02:17,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:02:17,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:02:17,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:02:17,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:02:17,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:02:17,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:02:17,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:02:17,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:02:17,703 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c3928a-f7da-4344-91a7-513a3330402c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:02:17,717 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:02:17,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:02:17,717 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:02:17,717 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:02:17,718 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:02:17,718 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:02:17,718 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:02:17,718 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:02:17,718 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:02:17,718 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:02:17,718 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:02:17,719 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:02:17,719 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:02:17,719 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:02:17,719 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:02:17,719 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:02:17,719 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:02:17,719 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:02:17,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:02:17,720 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:02:17,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:02:17,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:02:17,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:02:17,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:02:17,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:02:17,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:02:17,721 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:02:17,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:02:17,721 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:02:17,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:02:17,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:02:17,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:02:17,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:02:17,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:02:17,721 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:02:17,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:02:17,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:02:17,722 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:02:17,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:02:17,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:02:17,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:02:17,722 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_b0c3928a-f7da-4344-91a7-513a3330402c/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c3928a-f7da-4344-91a7-513a3330402c/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f65c5712bd883a6886a8bc01d4e0133fd034d0de7d6cdf4a43830b50c44bd44 [2022-12-14 06:02:17,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:02:17,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:02:17,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:02:17,917 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:02:17,918 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:02:17,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c3928a-f7da-4344-91a7-513a3330402c/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 06:02:20,540 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:02:20,740 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:02:20,740 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c3928a-f7da-4344-91a7-513a3330402c/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 06:02:20,750 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c3928a-f7da-4344-91a7-513a3330402c/bin/utaipan-gh47qXpMRh/data/f764a1a4e/63ff488f6bf74f05af23c6d372fc645a/FLAGc577d9a64 [2022-12-14 06:02:20,763 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c3928a-f7da-4344-91a7-513a3330402c/bin/utaipan-gh47qXpMRh/data/f764a1a4e/63ff488f6bf74f05af23c6d372fc645a [2022-12-14 06:02:20,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:02:20,767 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:02:20,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:02:20,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:02:20,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:02:20,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:02:20" (1/1) ... [2022-12-14 06:02:20,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b689204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:02:20, skipping insertion in model container [2022-12-14 06:02:20,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:02:20" (1/1) ... [2022-12-14 06:02:20,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:02:20,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:02:21,026 WARN L237 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_b0c3928a-f7da-4344-91a7-513a3330402c/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14417,14430] [2022-12-14 06:02:21,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:02:21,089 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:02:21,157 WARN L237 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_b0c3928a-f7da-4344-91a7-513a3330402c/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14417,14430] [2022-12-14 06:02:21,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:02:21,204 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:02:21,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:02:21 WrapperNode [2022-12-14 06:02:21,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:02:21,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:02:21,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:02:21,206 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:02:21,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:02:21" (1/1) ... [2022-12-14 06:02:21,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:02:21" (1/1) ... [2022-12-14 06:02:21,248 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1181 [2022-12-14 06:02:21,248 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:02:21,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:02:21,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:02:21,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:02:21,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:02:21" (1/1) ... [2022-12-14 06:02:21,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:02:21" (1/1) ... [2022-12-14 06:02:21,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:02:21" (1/1) ... [2022-12-14 06:02:21,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:02:21" (1/1) ... [2022-12-14 06:02:21,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:02:21" (1/1) ... [2022-12-14 06:02:21,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:02:21" (1/1) ... [2022-12-14 06:02:21,289 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:02:21" (1/1) ... [2022-12-14 06:02:21,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:02:21" (1/1) ... [2022-12-14 06:02:21,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:02:21,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:02:21,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:02:21,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:02:21,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:02:21" (1/1) ... [2022-12-14 06:02:21,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:02:21,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c3928a-f7da-4344-91a7-513a3330402c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:02:21,321 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c3928a-f7da-4344-91a7-513a3330402c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:02:21,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c3928a-f7da-4344-91a7-513a3330402c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:02:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:02:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:02:21,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:02:21,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:02:21,461 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:02:21,462 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:02:22,180 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:02:22,474 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:02:22,474 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 06:02:22,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:02:22 BoogieIcfgContainer [2022-12-14 06:02:22,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:02:22,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:02:22,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:02:22,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:02:22,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:02:20" (1/3) ... [2022-12-14 06:02:22,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20881644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:02:22, skipping insertion in model container [2022-12-14 06:02:22,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:02:21" (2/3) ... [2022-12-14 06:02:22,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20881644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:02:22, skipping insertion in model container [2022-12-14 06:02:22,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:02:22" (3/3) ... [2022-12-14 06:02:22,485 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 06:02:22,504 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:02:22,504 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:02:22,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:02:22,562 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;@78f897e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:02:22,562 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:02:22,567 INFO L276 IsEmpty]: Start isEmpty. Operand has 235 states, 225 states have (on average 1.7733333333333334) internal successors, (399), 234 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:22,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 06:02:22,577 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:22,578 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:02:22,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:02:22,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:22,584 INFO L85 PathProgramCache]: Analyzing trace with hash -197413294, now seen corresponding path program 1 times [2022-12-14 06:02:22,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:22,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141577405] [2022-12-14 06:02:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:22,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:02:23,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:23,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141577405] [2022-12-14 06:02:23,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141577405] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:02:23,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:02:23,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:02:23,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476459389] [2022-12-14 06:02:23,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:02:23,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:02:23,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:23,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:02:23,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:02:23,685 INFO L87 Difference]: Start difference. First operand has 235 states, 225 states have (on average 1.7733333333333334) internal successors, (399), 234 states have internal predecessors, (399), 0 states have call successors, (0), 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 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:23,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:23,890 INFO L93 Difference]: Finished difference Result 600 states and 1005 transitions. [2022-12-14 06:02:23,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:02:23,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2022-12-14 06:02:23,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:23,901 INFO L225 Difference]: With dead ends: 600 [2022-12-14 06:02:23,901 INFO L226 Difference]: Without dead ends: 397 [2022-12-14 06:02:23,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:02:23,907 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 1621 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1621 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:23,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1621 Valid, 722 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:02:23,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-12-14 06:02:23,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 395. [2022-12-14 06:02:23,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.3121827411167513) internal successors, (517), 394 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:23,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 517 transitions. [2022-12-14 06:02:23,986 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 517 transitions. Word has length 115 [2022-12-14 06:02:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:23,987 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 517 transitions. [2022-12-14 06:02:23,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:23,987 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 517 transitions. [2022-12-14 06:02:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 06:02:23,989 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:23,989 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:02:23,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:02:23,990 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:02:23,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:23,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1802334215, now seen corresponding path program 1 times [2022-12-14 06:02:23,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:23,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981643567] [2022-12-14 06:02:23,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:23,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:02:24,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:24,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981643567] [2022-12-14 06:02:24,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981643567] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:02:24,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:02:24,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:02:24,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431243175] [2022-12-14 06:02:24,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:02:24,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:02:24,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:24,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:02:24,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:02:24,141 INFO L87 Difference]: Start difference. First operand 395 states and 517 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:24,295 INFO L93 Difference]: Finished difference Result 737 states and 969 transitions. [2022-12-14 06:02:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:02:24,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-12-14 06:02:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:24,297 INFO L225 Difference]: With dead ends: 737 [2022-12-14 06:02:24,297 INFO L226 Difference]: Without dead ends: 395 [2022-12-14 06:02:24,298 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 [2022-12-14 06:02:24,299 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 798 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:24,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [798 Valid, 220 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:02:24,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-12-14 06:02:24,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2022-12-14 06:02:24,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.2893401015228427) internal successors, (508), 394 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:24,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 508 transitions. [2022-12-14 06:02:24,339 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 508 transitions. Word has length 121 [2022-12-14 06:02:24,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:24,339 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 508 transitions. [2022-12-14 06:02:24,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:24,339 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 508 transitions. [2022-12-14 06:02:24,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 06:02:24,341 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:24,341 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:02:24,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:02:24,342 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:02:24,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:24,342 INFO L85 PathProgramCache]: Analyzing trace with hash -391270348, now seen corresponding path program 1 times [2022-12-14 06:02:24,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:24,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412998184] [2022-12-14 06:02:24,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:24,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:02:24,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:24,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412998184] [2022-12-14 06:02:24,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412998184] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:02:24,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:02:24,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:02:24,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034996360] [2022-12-14 06:02:24,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:02:24,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:02:24,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:24,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:02:24,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:02:24,803 INFO L87 Difference]: Start difference. First operand 395 states and 508 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:24,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:24,982 INFO L93 Difference]: Finished difference Result 1025 states and 1324 transitions. [2022-12-14 06:02:24,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:02:24,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-12-14 06:02:24,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:24,985 INFO L225 Difference]: With dead ends: 1025 [2022-12-14 06:02:24,985 INFO L226 Difference]: Without dead ends: 709 [2022-12-14 06:02:24,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:02:24,986 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 489 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:24,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 671 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:02:24,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-12-14 06:02:25,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 707. [2022-12-14 06:02:25,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 1.2832861189801699) internal successors, (906), 706 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:25,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 906 transitions. [2022-12-14 06:02:25,048 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 906 transitions. Word has length 121 [2022-12-14 06:02:25,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:25,048 INFO L495 AbstractCegarLoop]: Abstraction has 707 states and 906 transitions. [2022-12-14 06:02:25,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:25,049 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 906 transitions. [2022-12-14 06:02:25,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 06:02:25,051 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:25,051 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:02:25,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 06:02:25,052 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:02:25,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:25,052 INFO L85 PathProgramCache]: Analyzing trace with hash 2023216494, now seen corresponding path program 1 times [2022-12-14 06:02:25,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:25,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932725041] [2022-12-14 06:02:25,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:25,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:02:25,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:25,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932725041] [2022-12-14 06:02:25,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932725041] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:02:25,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:02:25,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:02:25,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602715089] [2022-12-14 06:02:25,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:02:25,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:02:25,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:25,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:02:25,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:02:25,493 INFO L87 Difference]: Start difference. First operand 707 states and 906 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:25,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:25,718 INFO L93 Difference]: Finished difference Result 1924 states and 2462 transitions. [2022-12-14 06:02:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:02:25,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-12-14 06:02:25,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:25,722 INFO L225 Difference]: With dead ends: 1924 [2022-12-14 06:02:25,722 INFO L226 Difference]: Without dead ends: 1330 [2022-12-14 06:02:25,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:02:25,724 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 461 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:25,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 522 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:02:25,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2022-12-14 06:02:25,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1328. [2022-12-14 06:02:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 1.2720422004521477) internal successors, (1688), 1327 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:25,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 1688 transitions. [2022-12-14 06:02:25,838 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 1688 transitions. Word has length 127 [2022-12-14 06:02:25,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:25,838 INFO L495 AbstractCegarLoop]: Abstraction has 1328 states and 1688 transitions. [2022-12-14 06:02:25,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:25,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 1688 transitions. [2022-12-14 06:02:25,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 06:02:25,840 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:25,840 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:02:25,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 06:02:25,841 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:02:25,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:25,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1137935368, now seen corresponding path program 1 times [2022-12-14 06:02:25,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:25,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259374021] [2022-12-14 06:02:25,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:25,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:02:26,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:26,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259374021] [2022-12-14 06:02:26,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259374021] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:02:26,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:02:26,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:02:26,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546382948] [2022-12-14 06:02:26,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:02:26,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:02:26,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:26,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:02:26,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:02:26,316 INFO L87 Difference]: Start difference. First operand 1328 states and 1688 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:26,600 INFO L93 Difference]: Finished difference Result 2456 states and 3118 transitions. [2022-12-14 06:02:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:02:26,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2022-12-14 06:02:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:26,604 INFO L225 Difference]: With dead ends: 2456 [2022-12-14 06:02:26,604 INFO L226 Difference]: Without dead ends: 1910 [2022-12-14 06:02:26,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:02:26,606 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 721 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:26,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 508 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:02:26,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2022-12-14 06:02:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1908. [2022-12-14 06:02:26,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1907 states have (on average 1.2585212375458836) internal successors, (2400), 1907 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2400 transitions. [2022-12-14 06:02:26,778 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2400 transitions. Word has length 133 [2022-12-14 06:02:26,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:26,778 INFO L495 AbstractCegarLoop]: Abstraction has 1908 states and 2400 transitions. [2022-12-14 06:02:26,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:02:26,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2400 transitions. [2022-12-14 06:02:26,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 06:02:26,780 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:26,780 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:02:26,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 06:02:26,781 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:02:26,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:26,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1923832796, now seen corresponding path program 1 times [2022-12-14 06:02:26,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:26,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421883836] [2022-12-14 06:02:26,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:26,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:02:42,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:42,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421883836] [2022-12-14 06:02:42,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421883836] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:02:42,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:02:42,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-12-14 06:02:42,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605351222] [2022-12-14 06:02:42,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:02:42,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 06:02:42,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:42,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 06:02:42,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 06:02:42,269 INFO L87 Difference]: Start difference. First operand 1908 states and 2400 transitions. Second operand has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:01,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:03:01,592 INFO L93 Difference]: Finished difference Result 3728 states and 4854 transitions. [2022-12-14 06:03:01,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-14 06:03:01,593 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2022-12-14 06:03:01,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:03:01,598 INFO L225 Difference]: With dead ends: 3728 [2022-12-14 06:03:01,598 INFO L226 Difference]: Without dead ends: 2959 [2022-12-14 06:03:01,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=1077, Invalid=5565, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 06:03:01,601 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 2249 mSDsluCounter, 4261 mSDsCounter, 0 mSdLazyCounter, 3746 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2249 SdHoareTripleChecker+Valid, 4539 SdHoareTripleChecker+Invalid, 3771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:03:01,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2249 Valid, 4539 Invalid, 3771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3746 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-12-14 06:03:01,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2959 states. [2022-12-14 06:03:01,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2959 to 2477. [2022-12-14 06:03:01,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 1.2895799676898223) internal successors, (3193), 2476 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:01,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 3193 transitions. [2022-12-14 06:03:01,920 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 3193 transitions. Word has length 133 [2022-12-14 06:03:01,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:03:01,920 INFO L495 AbstractCegarLoop]: Abstraction has 2477 states and 3193 transitions. [2022-12-14 06:03:01,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:01,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 3193 transitions. [2022-12-14 06:03:01,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 06:03:01,922 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:03:01,922 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:03:01,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 06:03:01,923 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:03:01,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:03:01,923 INFO L85 PathProgramCache]: Analyzing trace with hash 894048897, now seen corresponding path program 1 times [2022-12-14 06:03:01,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:03:01,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912270837] [2022-12-14 06:03:01,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:01,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:03:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:03:02,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:03:02,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912270837] [2022-12-14 06:03:02,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912270837] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:03:02,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:03:02,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:03:02,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82920604] [2022-12-14 06:03:02,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:03:02,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:03:02,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:03:02,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:03:02,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:03:02,176 INFO L87 Difference]: Start difference. First operand 2477 states and 3193 transitions. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:02,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:03:02,914 INFO L93 Difference]: Finished difference Result 4311 states and 5573 transitions. [2022-12-14 06:03:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:03:02,915 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2022-12-14 06:03:02,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:03:02,919 INFO L225 Difference]: With dead ends: 4311 [2022-12-14 06:03:02,920 INFO L226 Difference]: Without dead ends: 2487 [2022-12-14 06:03:02,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:03:02,922 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 1586 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:03:02,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1586 Valid, 737 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:03:02,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2022-12-14 06:03:03,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 2477. [2022-12-14 06:03:03,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 1.2649434571890146) internal successors, (3132), 2476 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:03,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 3132 transitions. [2022-12-14 06:03:03,265 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 3132 transitions. Word has length 133 [2022-12-14 06:03:03,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:03:03,266 INFO L495 AbstractCegarLoop]: Abstraction has 2477 states and 3132 transitions. [2022-12-14 06:03:03,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:03,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 3132 transitions. [2022-12-14 06:03:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 06:03:03,268 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:03:03,268 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:03:03,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 06:03:03,268 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:03:03,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:03:03,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1882608703, now seen corresponding path program 1 times [2022-12-14 06:03:03,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:03:03,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356757687] [2022-12-14 06:03:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:03,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:03:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:03:03,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:03:03,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356757687] [2022-12-14 06:03:03,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356757687] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:03:03,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:03:03,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:03:03,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230304452] [2022-12-14 06:03:03,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:03:03,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:03:03,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:03:03,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:03:03,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:03:03,473 INFO L87 Difference]: Start difference. First operand 2477 states and 3132 transitions. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:03:04,442 INFO L93 Difference]: Finished difference Result 5914 states and 7501 transitions. [2022-12-14 06:03:04,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:03:04,442 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2022-12-14 06:03:04,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:03:04,450 INFO L225 Difference]: With dead ends: 5914 [2022-12-14 06:03:04,451 INFO L226 Difference]: Without dead ends: 3568 [2022-12-14 06:03:04,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:03:04,455 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 1323 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1323 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:03:04,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1323 Valid, 797 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:03:04,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2022-12-14 06:03:04,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 3549. [2022-12-14 06:03:04,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3549 states, 3548 states have (on average 1.225479143179256) internal successors, (4348), 3548 states have internal predecessors, (4348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:04,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3549 states to 3549 states and 4348 transitions. [2022-12-14 06:03:04,973 INFO L78 Accepts]: Start accepts. Automaton has 3549 states and 4348 transitions. Word has length 133 [2022-12-14 06:03:04,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:03:04,973 INFO L495 AbstractCegarLoop]: Abstraction has 3549 states and 4348 transitions. [2022-12-14 06:03:04,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:04,974 INFO L276 IsEmpty]: Start isEmpty. Operand 3549 states and 4348 transitions. [2022-12-14 06:03:04,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 06:03:04,977 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:03:04,977 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:03:04,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 06:03:04,977 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:03:04,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:03:04,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1656568136, now seen corresponding path program 1 times [2022-12-14 06:03:04,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:03:04,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198093824] [2022-12-14 06:03:04,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:04,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:03:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:03:05,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:03:05,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198093824] [2022-12-14 06:03:05,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198093824] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:03:05,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:03:05,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:03:05,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445461822] [2022-12-14 06:03:05,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:03:05,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:03:05,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:03:05,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:03:05,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:03:05,366 INFO L87 Difference]: Start difference. First operand 3549 states and 4348 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:05,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:03:05,923 INFO L93 Difference]: Finished difference Result 3823 states and 4694 transitions. [2022-12-14 06:03:05,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:03:05,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2022-12-14 06:03:05,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:03:05,929 INFO L225 Difference]: With dead ends: 3823 [2022-12-14 06:03:05,929 INFO L226 Difference]: Without dead ends: 3187 [2022-12-14 06:03:05,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:03:05,930 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 539 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:03:05,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 584 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:03:05,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2022-12-14 06:03:06,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 3185. [2022-12-14 06:03:06,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3185 states, 3184 states have (on average 1.224246231155779) internal successors, (3898), 3184 states have internal predecessors, (3898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 3898 transitions. [2022-12-14 06:03:06,374 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 3898 transitions. Word has length 133 [2022-12-14 06:03:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:03:06,375 INFO L495 AbstractCegarLoop]: Abstraction has 3185 states and 3898 transitions. [2022-12-14 06:03:06,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:06,375 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 3898 transitions. [2022-12-14 06:03:06,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 06:03:06,376 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:03:06,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:03:06,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:03:06,377 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:03:06,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:03:06,377 INFO L85 PathProgramCache]: Analyzing trace with hash -690531960, now seen corresponding path program 1 times [2022-12-14 06:03:06,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:03:06,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540450534] [2022-12-14 06:03:06,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:06,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:03:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:03:06,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:03:06,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540450534] [2022-12-14 06:03:06,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540450534] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:03:06,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:03:06,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:03:06,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171490382] [2022-12-14 06:03:06,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:03:06,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:03:06,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:03:06,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:03:06,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:03:06,718 INFO L87 Difference]: Start difference. First operand 3185 states and 3898 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:07,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:03:07,237 INFO L93 Difference]: Finished difference Result 3923 states and 4844 transitions. [2022-12-14 06:03:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:03:07,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2022-12-14 06:03:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:03:07,242 INFO L225 Difference]: With dead ends: 3923 [2022-12-14 06:03:07,242 INFO L226 Difference]: Without dead ends: 3007 [2022-12-14 06:03:07,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:03:07,244 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 719 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:03:07,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 587 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:03:07,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3007 states. [2022-12-14 06:03:07,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3007 to 2676. [2022-12-14 06:03:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2675 states have (on average 1.2220560747663551) internal successors, (3269), 2675 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:07,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 3269 transitions. [2022-12-14 06:03:07,638 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 3269 transitions. Word has length 133 [2022-12-14 06:03:07,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:03:07,638 INFO L495 AbstractCegarLoop]: Abstraction has 2676 states and 3269 transitions. [2022-12-14 06:03:07,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:07,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 3269 transitions. [2022-12-14 06:03:07,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 06:03:07,640 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:03:07,640 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:03:07,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 06:03:07,641 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:03:07,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:03:07,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1353668892, now seen corresponding path program 1 times [2022-12-14 06:03:07,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:03:07,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870966214] [2022-12-14 06:03:07,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:07,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:03:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:03:20,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:03:20,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870966214] [2022-12-14 06:03:20,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870966214] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:03:20,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:03:20,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-12-14 06:03:20,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344356071] [2022-12-14 06:03:20,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:03:20,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 06:03:20,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:03:20,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 06:03:20,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1698, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 06:03:20,926 INFO L87 Difference]: Start difference. First operand 2676 states and 3269 transitions. Second operand has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:42,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:03:42,604 INFO L93 Difference]: Finished difference Result 4817 states and 5833 transitions. [2022-12-14 06:03:42,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 06:03:42,605 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2022-12-14 06:03:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:03:42,611 INFO L225 Difference]: With dead ends: 4817 [2022-12-14 06:03:42,611 INFO L226 Difference]: Without dead ends: 3780 [2022-12-14 06:03:42,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=975, Invalid=5345, Unknown=0, NotChecked=0, Total=6320 [2022-12-14 06:03:42,613 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 1773 mSDsluCounter, 6613 mSDsCounter, 0 mSdLazyCounter, 5419 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1773 SdHoareTripleChecker+Valid, 6957 SdHoareTripleChecker+Invalid, 5447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 5419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:03:42,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1773 Valid, 6957 Invalid, 5447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 5419 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2022-12-14 06:03:42,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2022-12-14 06:03:43,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 2792. [2022-12-14 06:03:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2791 states have (on average 1.2164098889286994) internal successors, (3395), 2791 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:43,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 3395 transitions. [2022-12-14 06:03:43,090 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 3395 transitions. Word has length 133 [2022-12-14 06:03:43,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:03:43,091 INFO L495 AbstractCegarLoop]: Abstraction has 2792 states and 3395 transitions. [2022-12-14 06:03:43,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:43,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 3395 transitions. [2022-12-14 06:03:43,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 06:03:43,093 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:03:43,093 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:03:43,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 06:03:43,093 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:03:43,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:03:43,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1043944870, now seen corresponding path program 1 times [2022-12-14 06:03:43,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:03:43,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095824242] [2022-12-14 06:03:43,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:43,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:03:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:03:43,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:03:43,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095824242] [2022-12-14 06:03:43,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095824242] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:03:43,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:03:43,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:03:43,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851172656] [2022-12-14 06:03:43,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:03:43,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:03:43,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:03:43,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:03:43,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:03:43,137 INFO L87 Difference]: Start difference. First operand 2792 states and 3395 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:43,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:03:43,992 INFO L93 Difference]: Finished difference Result 4744 states and 5805 transitions. [2022-12-14 06:03:43,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:03:43,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2022-12-14 06:03:43,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:03:43,998 INFO L225 Difference]: With dead ends: 4744 [2022-12-14 06:03:43,998 INFO L226 Difference]: Without dead ends: 2984 [2022-12-14 06:03:43,999 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 [2022-12-14 06:03:43,999 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 215 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:03:44,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 301 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:03:44,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2022-12-14 06:03:44,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 2762. [2022-12-14 06:03:44,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2762 states, 2761 states have (on average 1.207171314741036) internal successors, (3333), 2761 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:44,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2762 states to 2762 states and 3333 transitions. [2022-12-14 06:03:44,475 INFO L78 Accepts]: Start accepts. Automaton has 2762 states and 3333 transitions. Word has length 134 [2022-12-14 06:03:44,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:03:44,475 INFO L495 AbstractCegarLoop]: Abstraction has 2762 states and 3333 transitions. [2022-12-14 06:03:44,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:44,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2762 states and 3333 transitions. [2022-12-14 06:03:44,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 06:03:44,476 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:03:44,477 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:03:44,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 06:03:44,477 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:03:44,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:03:44,477 INFO L85 PathProgramCache]: Analyzing trace with hash 458674701, now seen corresponding path program 1 times [2022-12-14 06:03:44,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:03:44,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470801686] [2022-12-14 06:03:44,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:44,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:03:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:44,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:03:44,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:03:44,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470801686] [2022-12-14 06:03:44,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470801686] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:03:44,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:03:44,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:03:44,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642730934] [2022-12-14 06:03:44,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:03:44,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:03:44,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:03:44,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:03:44,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:03:44,524 INFO L87 Difference]: Start difference. First operand 2762 states and 3333 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:45,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:03:45,270 INFO L93 Difference]: Finished difference Result 4250 states and 5131 transitions. [2022-12-14 06:03:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:03:45,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2022-12-14 06:03:45,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:03:45,278 INFO L225 Difference]: With dead ends: 4250 [2022-12-14 06:03:45,278 INFO L226 Difference]: Without dead ends: 2762 [2022-12-14 06:03:45,279 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 [2022-12-14 06:03:45,280 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 194 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:03:45,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 228 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:03:45,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2022-12-14 06:03:45,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 2730. [2022-12-14 06:03:45,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2730 states, 2729 states have (on average 1.1971418101868816) internal successors, (3267), 2729 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:45,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2730 states to 2730 states and 3267 transitions. [2022-12-14 06:03:45,749 INFO L78 Accepts]: Start accepts. Automaton has 2730 states and 3267 transitions. Word has length 134 [2022-12-14 06:03:45,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:03:45,749 INFO L495 AbstractCegarLoop]: Abstraction has 2730 states and 3267 transitions. [2022-12-14 06:03:45,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:45,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2730 states and 3267 transitions. [2022-12-14 06:03:45,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 06:03:45,752 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:03:45,752 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:03:45,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 06:03:45,752 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:03:45,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:03:45,752 INFO L85 PathProgramCache]: Analyzing trace with hash 864306709, now seen corresponding path program 1 times [2022-12-14 06:03:45,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:03:45,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315427531] [2022-12-14 06:03:45,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:45,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:03:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:03:45,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:03:45,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315427531] [2022-12-14 06:03:45,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315427531] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:03:45,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:03:45,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:03:45,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732148946] [2022-12-14 06:03:45,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:03:45,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:03:45,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:03:45,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:03:45,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:03:45,794 INFO L87 Difference]: Start difference. First operand 2730 states and 3267 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:46,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:03:46,466 INFO L93 Difference]: Finished difference Result 4603 states and 5549 transitions. [2022-12-14 06:03:46,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:03:46,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2022-12-14 06:03:46,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:03:46,472 INFO L225 Difference]: With dead ends: 4603 [2022-12-14 06:03:46,472 INFO L226 Difference]: Without dead ends: 3037 [2022-12-14 06:03:46,474 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 [2022-12-14 06:03:46,474 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 202 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:03:46,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 330 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:03:46,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2022-12-14 06:03:46,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 2691. [2022-12-14 06:03:46,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2691 states, 2690 states have (on average 1.1888475836431227) internal successors, (3198), 2690 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:46,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2691 states to 2691 states and 3198 transitions. [2022-12-14 06:03:46,940 INFO L78 Accepts]: Start accepts. Automaton has 2691 states and 3198 transitions. Word has length 134 [2022-12-14 06:03:46,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:03:46,941 INFO L495 AbstractCegarLoop]: Abstraction has 2691 states and 3198 transitions. [2022-12-14 06:03:46,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:46,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2691 states and 3198 transitions. [2022-12-14 06:03:46,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 06:03:46,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:03:46,943 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:03:46,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 06:03:46,943 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:03:46,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:03:46,943 INFO L85 PathProgramCache]: Analyzing trace with hash 662490543, now seen corresponding path program 1 times [2022-12-14 06:03:46,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:03:46,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976821006] [2022-12-14 06:03:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:46,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:03:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:03:46,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:03:46,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976821006] [2022-12-14 06:03:46,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976821006] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:03:46,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:03:46,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:03:46,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938725145] [2022-12-14 06:03:46,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:03:46,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:03:46,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:03:46,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:03:46,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:03:46,982 INFO L87 Difference]: Start difference. First operand 2691 states and 3198 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:47,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:03:47,750 INFO L93 Difference]: Finished difference Result 5822 states and 6982 transitions. [2022-12-14 06:03:47,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:03:47,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2022-12-14 06:03:47,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:03:47,754 INFO L225 Difference]: With dead ends: 5822 [2022-12-14 06:03:47,754 INFO L226 Difference]: Without dead ends: 3389 [2022-12-14 06:03:47,755 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 [2022-12-14 06:03:47,756 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 205 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:03:47,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 304 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:03:47,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3389 states. [2022-12-14 06:03:48,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3389 to 2632. [2022-12-14 06:03:48,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2631 states have (on average 1.1759787153173697) internal successors, (3094), 2631 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:48,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 3094 transitions. [2022-12-14 06:03:48,305 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 3094 transitions. Word has length 134 [2022-12-14 06:03:48,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:03:48,305 INFO L495 AbstractCegarLoop]: Abstraction has 2632 states and 3094 transitions. [2022-12-14 06:03:48,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:48,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 3094 transitions. [2022-12-14 06:03:48,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 06:03:48,306 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:03:48,306 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:03:48,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 06:03:48,307 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:03:48,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:03:48,307 INFO L85 PathProgramCache]: Analyzing trace with hash -294984645, now seen corresponding path program 1 times [2022-12-14 06:03:48,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:03:48,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128578176] [2022-12-14 06:03:48,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:48,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:03:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:48,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:03:48,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:03:48,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128578176] [2022-12-14 06:03:48,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128578176] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:03:48,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:03:48,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:03:48,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230917589] [2022-12-14 06:03:48,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:03:48,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:03:48,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:03:48,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:03:48,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:03:48,350 INFO L87 Difference]: Start difference. First operand 2632 states and 3094 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:48,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:03:48,891 INFO L93 Difference]: Finished difference Result 4426 states and 5235 transitions. [2022-12-14 06:03:48,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:03:48,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2022-12-14 06:03:48,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:03:48,894 INFO L225 Difference]: With dead ends: 4426 [2022-12-14 06:03:48,894 INFO L226 Difference]: Without dead ends: 2633 [2022-12-14 06:03:48,895 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 [2022-12-14 06:03:48,895 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 174 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:03:48,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 226 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:03:48,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2022-12-14 06:03:49,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 2593. [2022-12-14 06:03:49,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 2592 states have (on average 1.1628086419753085) internal successors, (3014), 2592 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:49,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 3014 transitions. [2022-12-14 06:03:49,340 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 3014 transitions. Word has length 134 [2022-12-14 06:03:49,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:03:49,341 INFO L495 AbstractCegarLoop]: Abstraction has 2593 states and 3014 transitions. [2022-12-14 06:03:49,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:49,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 3014 transitions. [2022-12-14 06:03:49,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 06:03:49,342 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:03:49,342 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:03:49,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 06:03:49,342 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:03:49,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:03:49,342 INFO L85 PathProgramCache]: Analyzing trace with hash 135595964, now seen corresponding path program 1 times [2022-12-14 06:03:49,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:03:49,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003875084] [2022-12-14 06:03:49,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:49,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:03:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:03:49,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:03:49,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003875084] [2022-12-14 06:03:49,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003875084] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:03:49,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:03:49,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:03:49,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228757599] [2022-12-14 06:03:49,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:03:49,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:03:49,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:03:49,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:03:49,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:03:49,386 INFO L87 Difference]: Start difference. First operand 2593 states and 3014 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:49,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:03:49,934 INFO L93 Difference]: Finished difference Result 4501 states and 5288 transitions. [2022-12-14 06:03:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:03:49,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2022-12-14 06:03:49,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:03:49,937 INFO L225 Difference]: With dead ends: 4501 [2022-12-14 06:03:49,937 INFO L226 Difference]: Without dead ends: 2684 [2022-12-14 06:03:49,938 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 [2022-12-14 06:03:49,939 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 178 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:03:49,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 248 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:03:49,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2022-12-14 06:03:50,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 2460. [2022-12-14 06:03:50,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2459 states have (on average 1.154127694184628) internal successors, (2838), 2459 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:50,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 2838 transitions. [2022-12-14 06:03:50,349 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 2838 transitions. Word has length 134 [2022-12-14 06:03:50,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:03:50,350 INFO L495 AbstractCegarLoop]: Abstraction has 2460 states and 2838 transitions. [2022-12-14 06:03:50,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:50,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 2838 transitions. [2022-12-14 06:03:50,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 06:03:50,351 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:03:50,351 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:03:50,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 06:03:50,351 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:03:50,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:03:50,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1546326565, now seen corresponding path program 1 times [2022-12-14 06:03:50,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:03:50,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126594467] [2022-12-14 06:03:50,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:50,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:03:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:03:50,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:03:50,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126594467] [2022-12-14 06:03:50,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126594467] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:03:50,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:03:50,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:03:50,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172072652] [2022-12-14 06:03:50,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:03:50,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:03:50,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:03:50,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:03:50,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:03:50,398 INFO L87 Difference]: Start difference. First operand 2460 states and 2838 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:51,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:03:51,114 INFO L93 Difference]: Finished difference Result 3904 states and 4529 transitions. [2022-12-14 06:03:51,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:03:51,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2022-12-14 06:03:51,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:03:51,118 INFO L225 Difference]: With dead ends: 3904 [2022-12-14 06:03:51,118 INFO L226 Difference]: Without dead ends: 3222 [2022-12-14 06:03:51,119 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 [2022-12-14 06:03:51,119 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 146 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:03:51,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 596 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:03:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2022-12-14 06:03:51,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 3220. [2022-12-14 06:03:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3220 states, 3219 states have (on average 1.145076110593352) internal successors, (3686), 3219 states have internal predecessors, (3686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:51,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3220 states to 3220 states and 3686 transitions. [2022-12-14 06:03:51,876 INFO L78 Accepts]: Start accepts. Automaton has 3220 states and 3686 transitions. Word has length 136 [2022-12-14 06:03:51,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:03:51,876 INFO L495 AbstractCegarLoop]: Abstraction has 3220 states and 3686 transitions. [2022-12-14 06:03:51,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:03:51,876 INFO L276 IsEmpty]: Start isEmpty. Operand 3220 states and 3686 transitions. [2022-12-14 06:03:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 06:03:51,880 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:03:51,880 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:03:51,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 06:03:51,880 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:03:51,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:03:51,881 INFO L85 PathProgramCache]: Analyzing trace with hash -582898774, now seen corresponding path program 1 times [2022-12-14 06:03:51,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:03:51,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880977533] [2022-12-14 06:03:51,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:51,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:03:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:04:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:04:08,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:04:08,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880977533] [2022-12-14 06:04:08,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880977533] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:04:08,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:04:08,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-12-14 06:04:08,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229001017] [2022-12-14 06:04:08,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:04:08,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 06:04:08,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:04:08,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 06:04:08,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1825, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 06:04:08,118 INFO L87 Difference]: Start difference. First operand 3220 states and 3686 transitions. Second operand has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:04:28,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:04:28,243 INFO L93 Difference]: Finished difference Result 3437 states and 3944 transitions. [2022-12-14 06:04:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 06:04:28,244 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2022-12-14 06:04:28,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:04:28,247 INFO L225 Difference]: With dead ends: 3437 [2022-12-14 06:04:28,247 INFO L226 Difference]: Without dead ends: 3221 [2022-12-14 06:04:28,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=1038, Invalid=4968, Unknown=0, NotChecked=0, Total=6006 [2022-12-14 06:04:28,249 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 1136 mSDsluCounter, 3214 mSDsCounter, 0 mSdLazyCounter, 3135 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1136 SdHoareTripleChecker+Valid, 3484 SdHoareTripleChecker+Invalid, 3145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:04:28,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1136 Valid, 3484 Invalid, 3145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3135 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-12-14 06:04:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3221 states. [2022-12-14 06:04:28,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3221 to 3219. [2022-12-14 06:04:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3219 states, 3218 states have (on average 1.1444996892479802) internal successors, (3683), 3218 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:04:28,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3219 states to 3219 states and 3683 transitions. [2022-12-14 06:04:28,834 INFO L78 Accepts]: Start accepts. Automaton has 3219 states and 3683 transitions. Word has length 139 [2022-12-14 06:04:28,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:04:28,834 INFO L495 AbstractCegarLoop]: Abstraction has 3219 states and 3683 transitions. [2022-12-14 06:04:28,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:04:28,834 INFO L276 IsEmpty]: Start isEmpty. Operand 3219 states and 3683 transitions. [2022-12-14 06:04:28,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 06:04:28,835 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:04:28,835 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:04:28,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 06:04:28,836 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:04:28,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:04:28,836 INFO L85 PathProgramCache]: Analyzing trace with hash 9922198, now seen corresponding path program 1 times [2022-12-14 06:04:28,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:04:28,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715746664] [2022-12-14 06:04:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:04:28,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:04:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:04:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:04:50,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:04:50,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715746664] [2022-12-14 06:04:50,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715746664] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:04:50,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:04:50,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-12-14 06:04:50,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507077707] [2022-12-14 06:04:50,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:04:50,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 06:04:50,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:04:50,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 06:04:50,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1938, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 06:04:50,708 INFO L87 Difference]: Start difference. First operand 3219 states and 3683 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:05:07,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:07,554 INFO L93 Difference]: Finished difference Result 3436 states and 3941 transitions. [2022-12-14 06:05:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 06:05:07,555 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2022-12-14 06:05:07,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:07,558 INFO L225 Difference]: With dead ends: 3436 [2022-12-14 06:05:07,558 INFO L226 Difference]: Without dead ends: 3220 [2022-12-14 06:05:07,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=1089, Invalid=5231, Unknown=0, NotChecked=0, Total=6320 [2022-12-14 06:05:07,560 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 1309 mSDsluCounter, 2900 mSDsCounter, 0 mSdLazyCounter, 3064 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1309 SdHoareTripleChecker+Valid, 3142 SdHoareTripleChecker+Invalid, 3071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 3064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:07,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1309 Valid, 3142 Invalid, 3071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 3064 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-12-14 06:05:07,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2022-12-14 06:05:08,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 3218. [2022-12-14 06:05:08,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3218 states, 3217 states have (on average 1.1439229095430525) internal successors, (3680), 3217 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:05:08,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3218 states to 3218 states and 3680 transitions. [2022-12-14 06:05:08,319 INFO L78 Accepts]: Start accepts. Automaton has 3218 states and 3680 transitions. Word has length 139 [2022-12-14 06:05:08,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:08,319 INFO L495 AbstractCegarLoop]: Abstraction has 3218 states and 3680 transitions. [2022-12-14 06:05:08,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:05:08,319 INFO L276 IsEmpty]: Start isEmpty. Operand 3218 states and 3680 transitions. [2022-12-14 06:05:08,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 06:05:08,323 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:08,323 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:08,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 06:05:08,323 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:05:08,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:08,324 INFO L85 PathProgramCache]: Analyzing trace with hash 536329863, now seen corresponding path program 1 times [2022-12-14 06:05:08,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:05:08,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856059053] [2022-12-14 06:05:08,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:08,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:05:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:05:17,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:05:17,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856059053] [2022-12-14 06:05:17,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856059053] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:05:17,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:05:17,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-12-14 06:05:17,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092724121] [2022-12-14 06:05:17,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:05:17,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 06:05:17,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:05:17,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 06:05:17,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1471, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 06:05:17,647 INFO L87 Difference]: Start difference. First operand 3218 states and 3680 transitions. Second operand has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 41 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:05:28,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:28,035 INFO L93 Difference]: Finished difference Result 5839 states and 7020 transitions. [2022-12-14 06:05:28,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 06:05:28,036 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 41 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2022-12-14 06:05:28,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:28,043 INFO L225 Difference]: With dead ends: 5839 [2022-12-14 06:05:28,043 INFO L226 Difference]: Without dead ends: 4448 [2022-12-14 06:05:28,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=706, Invalid=3716, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 06:05:28,047 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 646 mSDsluCounter, 3463 mSDsCounter, 0 mSdLazyCounter, 3267 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 3723 SdHoareTripleChecker+Invalid, 3282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:28,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 3723 Invalid, 3282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3267 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-12-14 06:05:28,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4448 states. [2022-12-14 06:05:29,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4448 to 4424. [2022-12-14 06:05:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4424 states, 4423 states have (on average 1.1770291657246212) internal successors, (5206), 4423 states have internal predecessors, (5206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:05:29,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 5206 transitions. [2022-12-14 06:05:29,373 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 5206 transitions. Word has length 139 [2022-12-14 06:05:29,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:29,373 INFO L495 AbstractCegarLoop]: Abstraction has 4424 states and 5206 transitions. [2022-12-14 06:05:29,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 41 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:05:29,373 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 5206 transitions. [2022-12-14 06:05:29,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 06:05:29,375 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:29,375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:29,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 06:05:29,375 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:05:29,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:29,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1855623758, now seen corresponding path program 1 times [2022-12-14 06:05:29,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:05:29,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116810044] [2022-12-14 06:05:29,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:29,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:05:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:05:46,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:05:46,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116810044] [2022-12-14 06:05:46,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116810044] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:05:46,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:05:46,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-12-14 06:05:46,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108731171] [2022-12-14 06:05:46,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:05:46,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 06:05:46,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:05:46,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 06:05:46,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2013, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 06:05:46,375 INFO L87 Difference]: Start difference. First operand 4424 states and 5206 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:06:08,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:08,437 INFO L93 Difference]: Finished difference Result 5218 states and 6158 transitions. [2022-12-14 06:06:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-14 06:06:08,438 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2022-12-14 06:06:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:08,443 INFO L225 Difference]: With dead ends: 5218 [2022-12-14 06:06:08,444 INFO L226 Difference]: Without dead ends: 4469 [2022-12-14 06:06:08,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=1111, Invalid=6029, Unknown=0, NotChecked=0, Total=7140 [2022-12-14 06:06:08,446 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 1154 mSDsluCounter, 5486 mSDsCounter, 0 mSdLazyCounter, 6057 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 5796 SdHoareTripleChecker+Invalid, 6069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 6057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:08,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1154 Valid, 5796 Invalid, 6069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 6057 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-12-14 06:06:08,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2022-12-14 06:06:09,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 4423. [2022-12-14 06:06:09,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 4422 states have (on average 1.1763907734056989) internal successors, (5202), 4422 states have internal predecessors, (5202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:06:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 5202 transitions. [2022-12-14 06:06:09,309 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 5202 transitions. Word has length 139 [2022-12-14 06:06:09,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:09,309 INFO L495 AbstractCegarLoop]: Abstraction has 4423 states and 5202 transitions. [2022-12-14 06:06:09,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:06:09,310 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 5202 transitions. [2022-12-14 06:06:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 06:06:09,311 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:09,311 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:06:09,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 06:06:09,311 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:06:09,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:09,312 INFO L85 PathProgramCache]: Analyzing trace with hash -65386454, now seen corresponding path program 1 times [2022-12-14 06:06:09,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:06:09,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804611905] [2022-12-14 06:06:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:09,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:06:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:06:24,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:06:24,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804611905] [2022-12-14 06:06:24,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804611905] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:06:24,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:06:24,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-12-14 06:06:24,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134098379] [2022-12-14 06:06:24,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:06:24,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 06:06:24,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:06:24,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 06:06:24,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 06:06:24,700 INFO L87 Difference]: Start difference. First operand 4423 states and 5202 transitions. Second operand has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:06:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:46,686 INFO L93 Difference]: Finished difference Result 5253 states and 6191 transitions. [2022-12-14 06:06:46,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 06:06:46,687 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2022-12-14 06:06:46,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:46,690 INFO L225 Difference]: With dead ends: 5253 [2022-12-14 06:06:46,690 INFO L226 Difference]: Without dead ends: 4538 [2022-12-14 06:06:46,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=1017, Invalid=4989, Unknown=0, NotChecked=0, Total=6006 [2022-12-14 06:06:46,692 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 1093 mSDsluCounter, 4825 mSDsCounter, 0 mSdLazyCounter, 4755 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 5148 SdHoareTripleChecker+Invalid, 4764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 4755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:46,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1093 Valid, 5148 Invalid, 4764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 4755 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-12-14 06:06:46,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4538 states. [2022-12-14 06:06:47,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4538 to 4422. [2022-12-14 06:06:47,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4422 states, 4421 states have (on average 1.175752092286813) internal successors, (5198), 4421 states have internal predecessors, (5198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:06:47,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 5198 transitions. [2022-12-14 06:06:47,577 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 5198 transitions. Word has length 139 [2022-12-14 06:06:47,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:47,577 INFO L495 AbstractCegarLoop]: Abstraction has 4422 states and 5198 transitions. [2022-12-14 06:06:47,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:06:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 5198 transitions. [2022-12-14 06:06:47,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 06:06:47,578 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:47,578 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:06:47,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 06:06:47,579 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:06:47,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:47,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1466065522, now seen corresponding path program 1 times [2022-12-14 06:06:47,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:06:47,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232365911] [2022-12-14 06:06:47,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:47,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:06:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:07:16,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:07:16,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:07:16,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232365911] [2022-12-14 06:07:16,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232365911] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:07:16,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:07:16,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-12-14 06:07:16,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492874552] [2022-12-14 06:07:16,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:07:16,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 06:07:16,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:07:16,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 06:07:16,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2008, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 06:07:16,650 INFO L87 Difference]: Start difference. First operand 4422 states and 5198 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:07:50,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:07:50,947 INFO L93 Difference]: Finished difference Result 5176 states and 6103 transitions. [2022-12-14 06:07:50,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-14 06:07:50,948 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2022-12-14 06:07:50,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:07:50,951 INFO L225 Difference]: With dead ends: 5176 [2022-12-14 06:07:50,951 INFO L226 Difference]: Without dead ends: 4423 [2022-12-14 06:07:50,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=1109, Invalid=5533, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 06:07:50,953 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 1363 mSDsluCounter, 4248 mSDsCounter, 0 mSdLazyCounter, 4656 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1363 SdHoareTripleChecker+Valid, 4547 SdHoareTripleChecker+Invalid, 4666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 4656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:07:50,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1363 Valid, 4547 Invalid, 4666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 4656 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-12-14 06:07:50,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4423 states. [2022-12-14 06:07:51,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4423 to 4421. [2022-12-14 06:07:51,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4421 states, 4420 states have (on average 1.1748868778280543) internal successors, (5193), 4420 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:07:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4421 states to 4421 states and 5193 transitions. [2022-12-14 06:07:51,866 INFO L78 Accepts]: Start accepts. Automaton has 4421 states and 5193 transitions. Word has length 139 [2022-12-14 06:07:51,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:07:51,866 INFO L495 AbstractCegarLoop]: Abstraction has 4421 states and 5193 transitions. [2022-12-14 06:07:51,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:07:51,867 INFO L276 IsEmpty]: Start isEmpty. Operand 4421 states and 5193 transitions. [2022-12-14 06:07:51,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 06:07:51,868 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:07:51,868 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:07:51,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 06:07:51,868 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:07:51,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:07:51,869 INFO L85 PathProgramCache]: Analyzing trace with hash -237450297, now seen corresponding path program 1 times [2022-12-14 06:07:51,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:07:51,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033309835] [2022-12-14 06:07:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:07:51,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:07:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:01,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:01,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033309835] [2022-12-14 06:08:01,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033309835] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:01,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:08:01,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-12-14 06:08:01,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820518850] [2022-12-14 06:08:01,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:01,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 06:08:01,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:01,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 06:08:01,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 06:08:01,152 INFO L87 Difference]: Start difference. First operand 4421 states and 5193 transitions. Second operand has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 41 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:12,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:12,201 INFO L93 Difference]: Finished difference Result 6340 states and 7647 transitions. [2022-12-14 06:08:12,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 06:08:12,202 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 41 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2022-12-14 06:08:12,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:12,206 INFO L225 Difference]: With dead ends: 6340 [2022-12-14 06:08:12,206 INFO L226 Difference]: Without dead ends: 5213 [2022-12-14 06:08:12,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=747, Invalid=4365, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 06:08:12,208 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 920 mSDsluCounter, 3475 mSDsCounter, 0 mSdLazyCounter, 3274 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 3839 SdHoareTripleChecker+Invalid, 3294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 3274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:12,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [920 Valid, 3839 Invalid, 3294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 3274 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-12-14 06:08:12,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5213 states. [2022-12-14 06:08:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5213 to 4760. [2022-12-14 06:08:13,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4760 states, 4759 states have (on average 1.1815507459550325) internal successors, (5623), 4759 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:13,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4760 states to 4760 states and 5623 transitions. [2022-12-14 06:08:13,213 INFO L78 Accepts]: Start accepts. Automaton has 4760 states and 5623 transitions. Word has length 139 [2022-12-14 06:08:13,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:13,213 INFO L495 AbstractCegarLoop]: Abstraction has 4760 states and 5623 transitions. [2022-12-14 06:08:13,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 41 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:08:13,213 INFO L276 IsEmpty]: Start isEmpty. Operand 4760 states and 5623 transitions. [2022-12-14 06:08:13,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 06:08:13,215 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:13,215 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:08:13,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 06:08:13,215 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:08:13,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:13,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1556176790, now seen corresponding path program 1 times [2022-12-14 06:08:13,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:08:13,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112743910] [2022-12-14 06:08:13,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:13,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:08:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:08:35,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:08:35,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112743910] [2022-12-14 06:08:35,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112743910] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:08:35,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:08:35,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-12-14 06:08:35,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382713377] [2022-12-14 06:08:35,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:08:35,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 06:08:35,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:08:35,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 06:08:35,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2004, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 06:08:35,598 INFO L87 Difference]: Start difference. First operand 4760 states and 5623 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:09:06,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:06,790 INFO L93 Difference]: Finished difference Result 5398 states and 6412 transitions. [2022-12-14 06:09:06,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-14 06:09:06,791 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2022-12-14 06:09:06,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:06,794 INFO L225 Difference]: With dead ends: 5398 [2022-12-14 06:09:06,794 INFO L226 Difference]: Without dead ends: 4761 [2022-12-14 06:09:06,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=1111, Invalid=5369, Unknown=0, NotChecked=0, Total=6480 [2022-12-14 06:09:06,796 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 1226 mSDsluCounter, 4269 mSDsCounter, 0 mSdLazyCounter, 4754 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1226 SdHoareTripleChecker+Valid, 4582 SdHoareTripleChecker+Invalid, 4761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 4754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:06,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1226 Valid, 4582 Invalid, 4761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 4754 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-12-14 06:09:06,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4761 states. [2022-12-14 06:09:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4761 to 4759. [2022-12-14 06:09:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4759 states, 4758 states have (on average 1.1811685582177385) internal successors, (5620), 4758 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:09:07,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4759 states to 4759 states and 5620 transitions. [2022-12-14 06:09:07,808 INFO L78 Accepts]: Start accepts. Automaton has 4759 states and 5620 transitions. Word has length 139 [2022-12-14 06:09:07,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:07,808 INFO L495 AbstractCegarLoop]: Abstraction has 4759 states and 5620 transitions. [2022-12-14 06:09:07,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:09:07,808 INFO L276 IsEmpty]: Start isEmpty. Operand 4759 states and 5620 transitions. [2022-12-14 06:09:07,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 06:09:07,810 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:07,810 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:09:07,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 06:09:07,810 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:09:07,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:07,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2066620954, now seen corresponding path program 1 times [2022-12-14 06:09:07,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:09:07,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463092863] [2022-12-14 06:09:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:07,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:09:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:09:20,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:09:20,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463092863] [2022-12-14 06:09:20,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463092863] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:09:20,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:09:20,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-12-14 06:09:20,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954901126] [2022-12-14 06:09:20,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:09:20,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 06:09:20,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:09:20,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 06:09:20,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1826, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 06:09:20,930 INFO L87 Difference]: Start difference. First operand 4759 states and 5620 transitions. Second operand has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:09:40,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:40,618 INFO L93 Difference]: Finished difference Result 5076 states and 6010 transitions. [2022-12-14 06:09:40,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 06:09:40,619 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2022-12-14 06:09:40,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:40,623 INFO L225 Difference]: With dead ends: 5076 [2022-12-14 06:09:40,623 INFO L226 Difference]: Without dead ends: 4760 [2022-12-14 06:09:40,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=992, Invalid=4558, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 06:09:40,624 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 1168 mSDsluCounter, 3900 mSDsCounter, 0 mSdLazyCounter, 4299 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1168 SdHoareTripleChecker+Valid, 4201 SdHoareTripleChecker+Invalid, 4306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 4299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:40,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1168 Valid, 4201 Invalid, 4306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 4299 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-12-14 06:09:40,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-12-14 06:09:41,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 4758. [2022-12-14 06:09:41,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4758 states, 4757 states have (on average 1.18078620979609) internal successors, (5617), 4757 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:09:41,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4758 states to 4758 states and 5617 transitions. [2022-12-14 06:09:41,675 INFO L78 Accepts]: Start accepts. Automaton has 4758 states and 5617 transitions. Word has length 139 [2022-12-14 06:09:41,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:41,675 INFO L495 AbstractCegarLoop]: Abstraction has 4758 states and 5617 transitions. [2022-12-14 06:09:41,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:09:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4758 states and 5617 transitions. [2022-12-14 06:09:41,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 06:09:41,676 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:41,676 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:09:41,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 06:09:41,677 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:09:41,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:41,677 INFO L85 PathProgramCache]: Analyzing trace with hash 827667274, now seen corresponding path program 1 times [2022-12-14 06:09:41,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:09:41,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007161145] [2022-12-14 06:09:41,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:41,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:09:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:10:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:10:03,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:10:03,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007161145] [2022-12-14 06:10:03,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007161145] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:10:03,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:10:03,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-12-14 06:10:03,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186631438] [2022-12-14 06:10:03,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:10:03,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 06:10:03,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:10:03,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 06:10:03,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1785, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 06:10:03,934 INFO L87 Difference]: Start difference. First operand 4758 states and 5617 transitions. Second operand has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:10:30,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:10:30,217 INFO L93 Difference]: Finished difference Result 4894 states and 5785 transitions. [2022-12-14 06:10:30,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 06:10:30,218 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2022-12-14 06:10:30,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:10:30,221 INFO L225 Difference]: With dead ends: 4894 [2022-12-14 06:10:30,221 INFO L226 Difference]: Without dead ends: 4759 [2022-12-14 06:10:30,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=1170, Invalid=5472, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 06:10:30,223 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 1289 mSDsluCounter, 4235 mSDsCounter, 0 mSdLazyCounter, 4670 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1289 SdHoareTripleChecker+Valid, 4584 SdHoareTripleChecker+Invalid, 4684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 4670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:10:30,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1289 Valid, 4584 Invalid, 4684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 4670 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-12-14 06:10:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4759 states. [2022-12-14 06:10:31,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4759 to 4757. [2022-12-14 06:10:31,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4757 states, 4756 states have (on average 1.180613961312027) internal successors, (5615), 4756 states have internal predecessors, (5615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:10:31,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4757 states to 4757 states and 5615 transitions. [2022-12-14 06:10:31,281 INFO L78 Accepts]: Start accepts. Automaton has 4757 states and 5615 transitions. Word has length 139 [2022-12-14 06:10:31,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:10:31,281 INFO L495 AbstractCegarLoop]: Abstraction has 4757 states and 5615 transitions. [2022-12-14 06:10:31,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:10:31,281 INFO L276 IsEmpty]: Start isEmpty. Operand 4757 states and 5615 transitions. [2022-12-14 06:10:31,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 06:10:31,283 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:10:31,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:10:31,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 06:10:31,283 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:10:31,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:10:31,283 INFO L85 PathProgramCache]: Analyzing trace with hash -263549878, now seen corresponding path program 1 times [2022-12-14 06:10:31,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:10:31,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654459078] [2022-12-14 06:10:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:10:31,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:10:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:11:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:11:01,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:11:01,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654459078] [2022-12-14 06:11:01,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654459078] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:11:01,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:11:01,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-12-14 06:11:01,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849775559] [2022-12-14 06:11:01,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:11:01,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 06:11:01,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:11:01,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 06:11:01,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1947, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 06:11:01,397 INFO L87 Difference]: Start difference. First operand 4757 states and 5615 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:11:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:11:29,025 INFO L93 Difference]: Finished difference Result 5504 states and 6522 transitions. [2022-12-14 06:11:29,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-14 06:11:29,026 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2022-12-14 06:11:29,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:11:29,031 INFO L225 Difference]: With dead ends: 5504 [2022-12-14 06:11:29,031 INFO L226 Difference]: Without dead ends: 4802 [2022-12-14 06:11:29,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=1231, Invalid=5909, Unknown=0, NotChecked=0, Total=7140 [2022-12-14 06:11:29,034 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 1071 mSDsluCounter, 4188 mSDsCounter, 0 mSdLazyCounter, 4996 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 4489 SdHoareTripleChecker+Invalid, 5009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 4996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:11:29,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1071 Valid, 4489 Invalid, 5009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 4996 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-12-14 06:11:29,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4802 states. [2022-12-14 06:11:30,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4802 to 4756. [2022-12-14 06:11:30,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4756 states, 4755 states have (on average 1.1800210304942167) internal successors, (5611), 4755 states have internal predecessors, (5611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:11:30,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4756 states to 4756 states and 5611 transitions. [2022-12-14 06:11:30,149 INFO L78 Accepts]: Start accepts. Automaton has 4756 states and 5611 transitions. Word has length 139 [2022-12-14 06:11:30,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:11:30,149 INFO L495 AbstractCegarLoop]: Abstraction has 4756 states and 5611 transitions. [2022-12-14 06:11:30,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:11:30,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4756 states and 5611 transitions. [2022-12-14 06:11:30,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 06:11:30,151 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:11:30,151 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:11:30,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 06:11:30,151 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:11:30,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:11:30,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1515124528, now seen corresponding path program 1 times [2022-12-14 06:11:30,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:11:30,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814690724] [2022-12-14 06:11:30,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:11:30,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:11:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:11:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:11:30,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:11:30,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814690724] [2022-12-14 06:11:30,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814690724] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:11:30,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:11:30,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:11:30,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183256924] [2022-12-14 06:11:30,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:11:30,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:11:30,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:11:30,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:11:30,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:11:30,205 INFO L87 Difference]: Start difference. First operand 4756 states and 5611 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:11:31,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:11:31,218 INFO L93 Difference]: Finished difference Result 6616 states and 8030 transitions. [2022-12-14 06:11:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:11:31,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-12-14 06:11:31,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:11:31,221 INFO L225 Difference]: With dead ends: 6616 [2022-12-14 06:11:31,221 INFO L226 Difference]: Without dead ends: 3281 [2022-12-14 06:11:31,224 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 [2022-12-14 06:11:31,224 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 52 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:11:31,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 329 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:11:31,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2022-12-14 06:11:31,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 1813. [2022-12-14 06:11:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 1.07560706401766) internal successors, (1949), 1812 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:11:31,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 1949 transitions. [2022-12-14 06:11:31,810 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 1949 transitions. Word has length 141 [2022-12-14 06:11:31,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:11:31,810 INFO L495 AbstractCegarLoop]: Abstraction has 1813 states and 1949 transitions. [2022-12-14 06:11:31,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:11:31,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 1949 transitions. [2022-12-14 06:11:31,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 06:11:31,812 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:11:31,812 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:11:31,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-14 06:11:31,812 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:11:31,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:11:31,812 INFO L85 PathProgramCache]: Analyzing trace with hash 843303688, now seen corresponding path program 1 times [2022-12-14 06:11:31,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:11:31,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346436101] [2022-12-14 06:11:31,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:11:31,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:11:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:12:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:12:01,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:12:01,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346436101] [2022-12-14 06:12:01,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346436101] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:12:01,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:12:01,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-12-14 06:12:01,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131031011] [2022-12-14 06:12:01,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:12:01,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 06:12:01,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:12:01,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 06:12:01,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2036, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 06:12:01,033 INFO L87 Difference]: Start difference. First operand 1813 states and 1949 transitions. Second operand has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:12:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:12:27,327 INFO L93 Difference]: Finished difference Result 2053 states and 2202 transitions. [2022-12-14 06:12:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-14 06:12:27,327 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2022-12-14 06:12:27,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:12:27,329 INFO L225 Difference]: With dead ends: 2053 [2022-12-14 06:12:27,329 INFO L226 Difference]: Without dead ends: 1931 [2022-12-14 06:12:27,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=1279, Invalid=5363, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 06:12:27,330 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 1491 mSDsluCounter, 2446 mSDsCounter, 0 mSdLazyCounter, 2832 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 2679 SdHoareTripleChecker+Invalid, 2841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:12:27,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1491 Valid, 2679 Invalid, 2841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2832 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-14 06:12:27,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-12-14 06:12:27,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1861. [2022-12-14 06:12:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1860 states have (on average 1.0731182795698924) internal successors, (1996), 1860 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:12:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 1996 transitions. [2022-12-14 06:12:27,920 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 1996 transitions. Word has length 145 [2022-12-14 06:12:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:12:27,920 INFO L495 AbstractCegarLoop]: Abstraction has 1861 states and 1996 transitions. [2022-12-14 06:12:27,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:12:27,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 1996 transitions. [2022-12-14 06:12:27,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 06:12:27,922 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:12:27,922 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:12:27,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-14 06:12:27,922 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:12:27,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:12:27,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1603959765, now seen corresponding path program 1 times [2022-12-14 06:12:27,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:12:27,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412050846] [2022-12-14 06:12:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:12:27,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:12:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:12:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:12:41,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:12:41,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412050846] [2022-12-14 06:12:41,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412050846] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:12:41,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:12:41,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-12-14 06:12:41,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629882465] [2022-12-14 06:12:41,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:12:41,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 06:12:41,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:12:41,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 06:12:41,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1986, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 06:12:41,877 INFO L87 Difference]: Start difference. First operand 1861 states and 1996 transitions. Second operand has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:12:57,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:12:57,964 INFO L93 Difference]: Finished difference Result 2350 states and 2593 transitions. [2022-12-14 06:12:57,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-14 06:12:57,965 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2022-12-14 06:12:57,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:12:57,967 INFO L225 Difference]: With dead ends: 2350 [2022-12-14 06:12:57,967 INFO L226 Difference]: Without dead ends: 2202 [2022-12-14 06:12:57,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1101, Invalid=6209, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 06:12:57,968 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 1184 mSDsluCounter, 3741 mSDsCounter, 0 mSdLazyCounter, 4034 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 3967 SdHoareTripleChecker+Invalid, 4044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 4034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:12:57,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1184 Valid, 3967 Invalid, 4044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 4034 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-12-14 06:12:57,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2022-12-14 06:12:58,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1818. [2022-12-14 06:12:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 1.0742982938910293) internal successors, (1952), 1817 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:12:58,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 1952 transitions. [2022-12-14 06:12:58,585 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 1952 transitions. Word has length 145 [2022-12-14 06:12:58,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:12:58,585 INFO L495 AbstractCegarLoop]: Abstraction has 1818 states and 1952 transitions. [2022-12-14 06:12:58,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:12:58,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 1952 transitions. [2022-12-14 06:12:58,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 06:12:58,586 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:12:58,586 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:12:58,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-14 06:12:58,586 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:12:58,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:12:58,587 INFO L85 PathProgramCache]: Analyzing trace with hash -92580415, now seen corresponding path program 1 times [2022-12-14 06:12:58,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:12:58,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859089867] [2022-12-14 06:12:58,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:12:58,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:12:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:13:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:13:09,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:13:09,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859089867] [2022-12-14 06:13:09,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859089867] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:13:09,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:13:09,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-12-14 06:13:09,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794735554] [2022-12-14 06:13:09,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:13:09,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 06:13:09,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:13:09,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 06:13:09,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1917, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 06:13:09,862 INFO L87 Difference]: Start difference. First operand 1818 states and 1952 transitions. Second operand has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 46 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:13:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:13:19,441 INFO L93 Difference]: Finished difference Result 2266 states and 2508 transitions. [2022-12-14 06:13:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 06:13:19,442 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 46 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2022-12-14 06:13:19,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:13:19,443 INFO L225 Difference]: With dead ends: 2266 [2022-12-14 06:13:19,443 INFO L226 Difference]: Without dead ends: 2111 [2022-12-14 06:13:19,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=708, Invalid=4548, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 06:13:19,444 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 617 mSDsluCounter, 3054 mSDsCounter, 0 mSdLazyCounter, 3350 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 3264 SdHoareTripleChecker+Invalid, 3358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:13:19,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 3264 Invalid, 3358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3350 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-12-14 06:13:19,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2022-12-14 06:13:20,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1727. [2022-12-14 06:13:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 1.0776361529548089) internal successors, (1860), 1726 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:13:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 1860 transitions. [2022-12-14 06:13:20,027 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 1860 transitions. Word has length 145 [2022-12-14 06:13:20,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:13:20,027 INFO L495 AbstractCegarLoop]: Abstraction has 1727 states and 1860 transitions. [2022-12-14 06:13:20,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 46 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:13:20,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 1860 transitions. [2022-12-14 06:13:20,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 06:13:20,028 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:13:20,028 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:13:20,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-14 06:13:20,028 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:13:20,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:13:20,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1301714909, now seen corresponding path program 1 times [2022-12-14 06:13:20,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:13:20,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76994982] [2022-12-14 06:13:20,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:13:20,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:13:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:13:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:13:35,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:13:35,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76994982] [2022-12-14 06:13:35,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76994982] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:13:35,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:13:35,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-12-14 06:13:35,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258557482] [2022-12-14 06:13:35,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:13:35,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 06:13:35,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:13:35,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 06:13:35,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 06:13:35,936 INFO L87 Difference]: Start difference. First operand 1727 states and 1860 transitions. Second operand has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:13:50,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:13:50,781 INFO L93 Difference]: Finished difference Result 1893 states and 2053 transitions. [2022-12-14 06:13:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 06:13:50,781 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2022-12-14 06:13:50,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:13:50,782 INFO L225 Difference]: With dead ends: 1893 [2022-12-14 06:13:50,783 INFO L226 Difference]: Without dead ends: 1673 [2022-12-14 06:13:50,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=772, Invalid=4778, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 06:13:50,783 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 608 mSDsluCounter, 2184 mSDsCounter, 0 mSdLazyCounter, 2653 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 2317 SdHoareTripleChecker+Invalid, 2655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:13:50,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 2317 Invalid, 2655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2653 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-12-14 06:13:50,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2022-12-14 06:13:51,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1673. [2022-12-14 06:13:51,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 1.0795454545454546) internal successors, (1805), 1672 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:13:51,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 1805 transitions. [2022-12-14 06:13:51,344 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 1805 transitions. Word has length 145 [2022-12-14 06:13:51,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:13:51,344 INFO L495 AbstractCegarLoop]: Abstraction has 1673 states and 1805 transitions. [2022-12-14 06:13:51,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:13:51,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 1805 transitions. [2022-12-14 06:13:51,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 06:13:51,345 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:13:51,345 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:13:51,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-14 06:13:51,346 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:13:51,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:13:51,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1146374059, now seen corresponding path program 1 times [2022-12-14 06:13:51,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:13:51,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479759124] [2022-12-14 06:13:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:13:51,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:13:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:04,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:14:04,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:04,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479759124] [2022-12-14 06:14:04,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479759124] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:14:04,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:14:04,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-12-14 06:14:04,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814742512] [2022-12-14 06:14:04,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:14:04,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 06:14:04,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:04,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 06:14:04,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1894, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 06:14:04,958 INFO L87 Difference]: Start difference. First operand 1673 states and 1805 transitions. Second operand has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 46 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:20,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:20,866 INFO L93 Difference]: Finished difference Result 2182 states and 2437 transitions. [2022-12-14 06:14:20,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 06:14:20,867 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 46 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2022-12-14 06:14:20,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:20,869 INFO L225 Difference]: With dead ends: 2182 [2022-12-14 06:14:20,869 INFO L226 Difference]: Without dead ends: 1977 [2022-12-14 06:14:20,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=906, Invalid=5256, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 06:14:20,870 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 1125 mSDsluCounter, 3065 mSDsCounter, 0 mSdLazyCounter, 3381 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 3291 SdHoareTripleChecker+Invalid, 3396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:20,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1125 Valid, 3291 Invalid, 3396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3381 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-12-14 06:14:20,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2022-12-14 06:14:21,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1593. [2022-12-14 06:14:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 1.0829145728643217) internal successors, (1724), 1592 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:21,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 1724 transitions. [2022-12-14 06:14:21,425 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 1724 transitions. Word has length 145 [2022-12-14 06:14:21,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:21,426 INFO L495 AbstractCegarLoop]: Abstraction has 1593 states and 1724 transitions. [2022-12-14 06:14:21,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 46 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:21,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 1724 transitions. [2022-12-14 06:14:21,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 06:14:21,427 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:21,427 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:21,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-12-14 06:14:21,428 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:21,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:21,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1346632392, now seen corresponding path program 1 times [2022-12-14 06:14:21,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:21,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494520693] [2022-12-14 06:14:21,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:21,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:14:48,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:48,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494520693] [2022-12-14 06:14:48,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494520693] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:14:48,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:14:48,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-12-14 06:14:48,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497205554] [2022-12-14 06:14:48,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:14:48,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-14 06:14:48,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:48,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-14 06:14:48,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2111, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 06:14:48,460 INFO L87 Difference]: Start difference. First operand 1593 states and 1724 transitions. Second operand has 52 states, 52 states have (on average 2.7884615384615383) internal successors, (145), 51 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:15:08,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:15:08,619 INFO L93 Difference]: Finished difference Result 1703 states and 1846 transitions. [2022-12-14 06:15:08,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-14 06:15:08,620 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.7884615384615383) internal successors, (145), 51 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2022-12-14 06:15:08,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:15:08,621 INFO L225 Difference]: With dead ends: 1703 [2022-12-14 06:15:08,622 INFO L226 Difference]: Without dead ends: 1639 [2022-12-14 06:15:08,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=1439, Invalid=5701, Unknown=0, NotChecked=0, Total=7140 [2022-12-14 06:15:08,622 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 1296 mSDsluCounter, 2505 mSDsCounter, 0 mSdLazyCounter, 2979 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 2732 SdHoareTripleChecker+Invalid, 2994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:15:08,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1296 Valid, 2732 Invalid, 2994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2979 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-12-14 06:15:08,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2022-12-14 06:15:09,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1593. [2022-12-14 06:15:09,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 1.0829145728643217) internal successors, (1724), 1592 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:15:09,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 1724 transitions. [2022-12-14 06:15:09,178 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 1724 transitions. Word has length 145 [2022-12-14 06:15:09,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:15:09,178 INFO L495 AbstractCegarLoop]: Abstraction has 1593 states and 1724 transitions. [2022-12-14 06:15:09,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.7884615384615383) internal successors, (145), 51 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:15:09,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 1724 transitions. [2022-12-14 06:15:09,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 06:15:09,179 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:15:09,179 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:15:09,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-12-14 06:15:09,180 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:15:09,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:15:09,180 INFO L85 PathProgramCache]: Analyzing trace with hash -712346951, now seen corresponding path program 1 times [2022-12-14 06:15:09,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:15:09,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277916111] [2022-12-14 06:15:09,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:15:09,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:15:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:15:19,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:15:19,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277916111] [2022-12-14 06:15:19,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277916111] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:15:19,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:15:19,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-12-14 06:15:19,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275461486] [2022-12-14 06:15:19,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:15:19,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 06:15:19,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:15:19,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 06:15:19,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=1680, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 06:15:19,853 INFO L87 Difference]: Start difference. First operand 1593 states and 1724 transitions. Second operand has 46 states, 46 states have (on average 3.152173913043478) internal successors, (145), 45 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:15:29,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:15:29,316 INFO L93 Difference]: Finished difference Result 2041 states and 2280 transitions. [2022-12-14 06:15:29,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-14 06:15:29,317 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.152173913043478) internal successors, (145), 45 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2022-12-14 06:15:29,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:15:29,318 INFO L225 Difference]: With dead ends: 2041 [2022-12-14 06:15:29,319 INFO L226 Difference]: Without dead ends: 1893 [2022-12-14 06:15:29,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1045, Invalid=5117, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 06:15:29,319 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 556 mSDsluCounter, 2916 mSDsCounter, 0 mSdLazyCounter, 2994 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 3145 SdHoareTripleChecker+Invalid, 3004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:15:29,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 3145 Invalid, 3004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2994 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 06:15:29,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2022-12-14 06:15:29,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1509. [2022-12-14 06:15:29,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1508 states have (on average 1.086870026525199) internal successors, (1639), 1508 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:15:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 1639 transitions. [2022-12-14 06:15:29,842 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 1639 transitions. Word has length 145 [2022-12-14 06:15:29,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:15:29,842 INFO L495 AbstractCegarLoop]: Abstraction has 1509 states and 1639 transitions. [2022-12-14 06:15:29,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.152173913043478) internal successors, (145), 45 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:15:29,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 1639 transitions. [2022-12-14 06:15:29,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 06:15:29,843 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:15:29,843 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:15:29,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-12-14 06:15:29,843 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:15:29,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:15:29,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1014591807, now seen corresponding path program 1 times [2022-12-14 06:15:29,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:15:29,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655591914] [2022-12-14 06:15:29,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:15:29,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:15:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:49,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:15:49,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:15:49,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655591914] [2022-12-14 06:15:49,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655591914] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:15:49,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:15:49,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-12-14 06:15:49,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839754155] [2022-12-14 06:15:49,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:15:49,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 06:15:49,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:15:49,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 06:15:49,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1923, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 06:15:49,713 INFO L87 Difference]: Start difference. First operand 1509 states and 1639 transitions. Second operand has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 46 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:16:09,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:16:09,864 INFO L93 Difference]: Finished difference Result 2018 states and 2271 transitions. [2022-12-14 06:16:09,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-14 06:16:09,864 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 46 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2022-12-14 06:16:09,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:16:09,866 INFO L225 Difference]: With dead ends: 2018 [2022-12-14 06:16:09,866 INFO L226 Difference]: Without dead ends: 1798 [2022-12-14 06:16:09,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1548 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=919, Invalid=5401, Unknown=0, NotChecked=0, Total=6320 [2022-12-14 06:16:09,867 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 738 mSDsluCounter, 3120 mSDsCounter, 0 mSdLazyCounter, 3431 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 3326 SdHoareTripleChecker+Invalid, 3442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:16:09,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 3326 Invalid, 3442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3431 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-12-14 06:16:09,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2022-12-14 06:16:10,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1414. [2022-12-14 06:16:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1413 states have (on average 1.092002830856334) internal successors, (1543), 1413 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:16:10,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1543 transitions. [2022-12-14 06:16:10,347 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1543 transitions. Word has length 145 [2022-12-14 06:16:10,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:16:10,347 INFO L495 AbstractCegarLoop]: Abstraction has 1414 states and 1543 transitions. [2022-12-14 06:16:10,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 46 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:16:10,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1543 transitions. [2022-12-14 06:16:10,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 06:16:10,348 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:16:10,348 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:16:10,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-12-14 06:16:10,349 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:16:10,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:16:10,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1443240072, now seen corresponding path program 1 times [2022-12-14 06:16:10,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:16:10,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611784597] [2022-12-14 06:16:10,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:16:10,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:16:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:16:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:16:27,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:16:27,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611784597] [2022-12-14 06:16:27,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611784597] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:16:27,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:16:27,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-12-14 06:16:27,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813988821] [2022-12-14 06:16:27,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:16:27,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-14 06:16:27,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:16:27,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-14 06:16:27,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=2356, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 06:16:27,158 INFO L87 Difference]: Start difference. First operand 1414 states and 1543 transitions. Second operand has 52 states, 52 states have (on average 2.7884615384615383) internal successors, (145), 51 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)