./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242e407b-232d-42ad-9016-4d61b257f7ca/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242e407b-232d-42ad-9016-4d61b257f7ca/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242e407b-232d-42ad-9016-4d61b257f7ca/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242e407b-232d-42ad-9016-4d61b257f7ca/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242e407b-232d-42ad-9016-4d61b257f7ca/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242e407b-232d-42ad-9016-4d61b257f7ca/bin/utaipan-I9t0OCRTmS --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 237919602f057be6bafc5b901424d626990bfa1f459ab937d0f6252d6c0cf13c --- 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-8393723 [2022-11-19 07:47:49,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:47:49,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:47:49,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:47:49,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:47:49,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:47:49,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:47:49,582 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:47:49,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:47:49,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:47:49,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:47:49,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:47:49,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:47:49,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:47:49,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:47:49,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:47:49,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:47:49,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:47:49,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:47:49,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:47:49,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:47:49,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:47:49,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:47:49,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:47:49,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:47:49,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:47:49,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:47:49,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:47:49,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:47:49,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:47:49,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:47:49,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:47:49,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:47:49,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:47:49,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:47:49,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:47:49,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:47:49,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:47:49,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:47:49,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:47:49,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:47:49,646 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242e407b-232d-42ad-9016-4d61b257f7ca/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:47:49,680 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:47:49,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:47:49,681 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:47:49,681 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:47:49,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:47:49,682 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:47:49,682 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:47:49,682 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:47:49,683 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:47:49,683 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:47:49,684 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:47:49,684 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:47:49,684 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:47:49,685 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:47:49,685 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:47:49,685 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:47:49,685 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:47:49,685 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:47:49,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:47:49,686 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:47:49,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:47:49,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:47:49,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:47:49,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:47:49,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:47:49,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:47:49,689 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:47:49,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:47:49,689 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:47:49,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:47:49,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:47:49,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:47:49,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:47:49,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:47:49,690 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:47:49,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:47:49,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:47:49,691 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:47:49,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:47:49,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:47:49,692 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:47:49,692 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_242e407b-232d-42ad-9016-4d61b257f7ca/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242e407b-232d-42ad-9016-4d61b257f7ca/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 237919602f057be6bafc5b901424d626990bfa1f459ab937d0f6252d6c0cf13c [2022-11-19 07:47:49,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:47:50,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:47:50,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:47:50,019 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:47:50,020 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:47:50,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242e407b-232d-42ad-9016-4d61b257f7ca/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2022-11-19 07:47:50,097 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242e407b-232d-42ad-9016-4d61b257f7ca/bin/utaipan-I9t0OCRTmS/data/d0a3ac567/59f2669e359047a7adbe92b54c86a823/FLAGa105e65fd [2022-11-19 07:47:50,585 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:47:50,586 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242e407b-232d-42ad-9016-4d61b257f7ca/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2022-11-19 07:47:50,597 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242e407b-232d-42ad-9016-4d61b257f7ca/bin/utaipan-I9t0OCRTmS/data/d0a3ac567/59f2669e359047a7adbe92b54c86a823/FLAGa105e65fd [2022-11-19 07:47:50,902 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242e407b-232d-42ad-9016-4d61b257f7ca/bin/utaipan-I9t0OCRTmS/data/d0a3ac567/59f2669e359047a7adbe92b54c86a823 [2022-11-19 07:47:50,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:47:50,906 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:47:50,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:47:50,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:47:50,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:47:50,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:50" (1/1) ... [2022-11-19 07:47:50,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87897fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:50, skipping insertion in model container [2022-11-19 07:47:50,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:50" (1/1) ... [2022-11-19 07:47:50,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:47:50,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:47:51,308 WARN L234 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_242e407b-232d-42ad-9016-4d61b257f7ca/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8607,8620] [2022-11-19 07:47:51,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:47:51,382 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:47:51,431 WARN L234 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_242e407b-232d-42ad-9016-4d61b257f7ca/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8607,8620] [2022-11-19 07:47:51,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:47:51,530 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:47:51,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:51 WrapperNode [2022-11-19 07:47:51,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:47:51,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:47:51,532 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:47:51,532 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:47:51,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:51" (1/1) ... [2022-11-19 07:47:51,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:51" (1/1) ... [2022-11-19 07:47:51,594 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 803 [2022-11-19 07:47:51,603 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:47:51,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:47:51,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:47:51,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:47:51,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:51" (1/1) ... [2022-11-19 07:47:51,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:51" (1/1) ... [2022-11-19 07:47:51,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:51" (1/1) ... [2022-11-19 07:47:51,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:51" (1/1) ... [2022-11-19 07:47:51,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:51" (1/1) ... [2022-11-19 07:47:51,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:51" (1/1) ... [2022-11-19 07:47:51,638 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:51" (1/1) ... [2022-11-19 07:47:51,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:51" (1/1) ... [2022-11-19 07:47:51,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:47:51,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:47:51,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:47:51,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:47:51,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:51" (1/1) ... [2022-11-19 07:47:51,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:47:51,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242e407b-232d-42ad-9016-4d61b257f7ca/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:51,696 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242e407b-232d-42ad-9016-4d61b257f7ca/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:47:51,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_242e407b-232d-42ad-9016-4d61b257f7ca/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:47:51,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:47:51,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:47:51,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:47:51,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:47:51,876 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:47:51,878 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:47:52,743 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:47:53,002 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:47:53,002 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 07:47:53,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:53 BoogieIcfgContainer [2022-11-19 07:47:53,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:47:53,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:47:53,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:47:53,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:47:53,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:47:50" (1/3) ... [2022-11-19 07:47:53,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28431008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:53, skipping insertion in model container [2022-11-19 07:47:53,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:51" (2/3) ... [2022-11-19 07:47:53,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28431008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:53, skipping insertion in model container [2022-11-19 07:47:53,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:53" (3/3) ... [2022-11-19 07:47:53,019 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2022-11-19 07:47:53,038 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:47:53,039 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:47:53,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:47:53,102 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;@3248947a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:47:53,103 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:47:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 163 states have (on average 1.705521472392638) internal successors, (278), 164 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:53,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-19 07:47:53,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:53,118 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] [2022-11-19 07:47:53,118 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:53,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:53,124 INFO L85 PathProgramCache]: Analyzing trace with hash 441315863, now seen corresponding path program 1 times [2022-11-19 07:47:53,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:53,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498600402] [2022-11-19 07:47:53,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:53,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:53,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:53,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498600402] [2022-11-19 07:47:53,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498600402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:53,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:53,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:47:53,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463679075] [2022-11-19 07:47:53,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:53,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:47:53,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:53,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:47:53,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:47:53,970 INFO L87 Difference]: Start difference. First operand has 165 states, 163 states have (on average 1.705521472392638) internal successors, (278), 164 states have internal predecessors, (278), 0 states have call successors, (0), 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 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:54,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:54,512 INFO L93 Difference]: Finished difference Result 577 states and 924 transitions. [2022-11-19 07:47:54,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:47:54,514 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-19 07:47:54,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:54,527 INFO L225 Difference]: With dead ends: 577 [2022-11-19 07:47:54,528 INFO L226 Difference]: Without dead ends: 480 [2022-11-19 07:47:54,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:47:54,534 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 870 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:54,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 1146 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:47:54,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-11-19 07:47:54,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 472. [2022-11-19 07:47:54,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 1.40552016985138) internal successors, (662), 471 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:54,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 662 transitions. [2022-11-19 07:47:54,689 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 662 transitions. Word has length 68 [2022-11-19 07:47:54,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:54,690 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 662 transitions. [2022-11-19 07:47:54,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:54,690 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 662 transitions. [2022-11-19 07:47:54,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 07:47:54,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:54,693 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] [2022-11-19 07:47:54,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:47:54,693 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:54,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:54,694 INFO L85 PathProgramCache]: Analyzing trace with hash -323387448, now seen corresponding path program 1 times [2022-11-19 07:47:54,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:54,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4657534] [2022-11-19 07:47:54,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:54,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:54,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:54,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4657534] [2022-11-19 07:47:54,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4657534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:54,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:54,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:47:54,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580220384] [2022-11-19 07:47:54,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:54,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:47:54,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:54,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:47:54,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:47:54,958 INFO L87 Difference]: Start difference. First operand 472 states and 662 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:55,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:55,443 INFO L93 Difference]: Finished difference Result 1132 states and 1626 transitions. [2022-11-19 07:47:55,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:47:55,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-19 07:47:55,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:55,448 INFO L225 Difference]: With dead ends: 1132 [2022-11-19 07:47:55,448 INFO L226 Difference]: Without dead ends: 702 [2022-11-19 07:47:55,458 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 [2022-11-19 07:47:55,460 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 597 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:55,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 224 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:47:55,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-11-19 07:47:55,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 700. [2022-11-19 07:47:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 1.4291845493562232) internal successors, (999), 699 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 999 transitions. [2022-11-19 07:47:55,582 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 999 transitions. Word has length 69 [2022-11-19 07:47:55,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:55,582 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 999 transitions. [2022-11-19 07:47:55,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:55,582 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 999 transitions. [2022-11-19 07:47:55,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 07:47:55,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:55,585 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] [2022-11-19 07:47:55,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:47:55,585 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:55,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:55,586 INFO L85 PathProgramCache]: Analyzing trace with hash 297823703, now seen corresponding path program 1 times [2022-11-19 07:47:55,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:55,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113508636] [2022-11-19 07:47:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:55,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:55,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:55,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113508636] [2022-11-19 07:47:55,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113508636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:55,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:55,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:47:55,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793774709] [2022-11-19 07:47:55,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:55,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:47:55,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:55,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:47:55,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:47:55,741 INFO L87 Difference]: Start difference. First operand 700 states and 999 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:56,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:56,262 INFO L93 Difference]: Finished difference Result 1847 states and 2690 transitions. [2022-11-19 07:47:56,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:47:56,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-19 07:47:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:56,270 INFO L225 Difference]: With dead ends: 1847 [2022-11-19 07:47:56,271 INFO L226 Difference]: Without dead ends: 1205 [2022-11-19 07:47:56,274 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 [2022-11-19 07:47:56,280 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 580 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:56,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 232 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:47:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2022-11-19 07:47:56,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1203. [2022-11-19 07:47:56,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.4467554076539102) internal successors, (1739), 1202 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1739 transitions. [2022-11-19 07:47:56,553 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1739 transitions. Word has length 69 [2022-11-19 07:47:56,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:56,554 INFO L495 AbstractCegarLoop]: Abstraction has 1203 states and 1739 transitions. [2022-11-19 07:47:56,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:56,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1739 transitions. [2022-11-19 07:47:56,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 07:47:56,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:56,560 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] [2022-11-19 07:47:56,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:47:56,561 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:56,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:56,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1325617626, now seen corresponding path program 1 times [2022-11-19 07:47:56,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:56,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025568731] [2022-11-19 07:47:56,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:56,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:56,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:56,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025568731] [2022-11-19 07:47:56,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025568731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:56,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:56,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:47:56,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122613641] [2022-11-19 07:47:56,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:56,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:47:56,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:56,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:47:56,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:47:56,836 INFO L87 Difference]: Start difference. First operand 1203 states and 1739 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:57,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:57,558 INFO L93 Difference]: Finished difference Result 3333 states and 4883 transitions. [2022-11-19 07:47:57,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:47:57,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-19 07:47:57,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:57,568 INFO L225 Difference]: With dead ends: 3333 [2022-11-19 07:47:57,568 INFO L226 Difference]: Without dead ends: 2211 [2022-11-19 07:47:57,571 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 [2022-11-19 07:47:57,578 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 563 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:57,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 240 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:47:57,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2022-11-19 07:47:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2209. [2022-11-19 07:47:58,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 1.453804347826087) internal successors, (3210), 2208 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:58,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 3210 transitions. [2022-11-19 07:47:58,053 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 3210 transitions. Word has length 69 [2022-11-19 07:47:58,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:58,055 INFO L495 AbstractCegarLoop]: Abstraction has 2209 states and 3210 transitions. [2022-11-19 07:47:58,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:58,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 3210 transitions. [2022-11-19 07:47:58,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 07:47:58,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:58,057 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] [2022-11-19 07:47:58,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:47:58,057 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:58,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:58,058 INFO L85 PathProgramCache]: Analyzing trace with hash -589774667, now seen corresponding path program 1 times [2022-11-19 07:47:58,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:58,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918694205] [2022-11-19 07:47:58,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:58,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:58,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:58,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918694205] [2022-11-19 07:47:58,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918694205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:58,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:58,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:47:58,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733753972] [2022-11-19 07:47:58,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:58,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:47:58,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:58,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:47:58,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:47:58,273 INFO L87 Difference]: Start difference. First operand 2209 states and 3210 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:47:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:59,312 INFO L93 Difference]: Finished difference Result 6321 states and 9261 transitions. [2022-11-19 07:47:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:47:59,313 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-19 07:47:59,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:59,329 INFO L225 Difference]: With dead ends: 6321 [2022-11-19 07:47:59,330 INFO L226 Difference]: Without dead ends: 4223 [2022-11-19 07:47:59,333 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 [2022-11-19 07:47:59,334 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 546 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:59,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 248 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:47:59,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2022-11-19 07:47:59,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 4221. [2022-11-19 07:47:59,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4221 states, 4220 states have (on average 1.454265402843602) internal successors, (6137), 4220 states have internal predecessors, (6137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:00,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4221 states to 4221 states and 6137 transitions. [2022-11-19 07:48:00,021 INFO L78 Accepts]: Start accepts. Automaton has 4221 states and 6137 transitions. Word has length 69 [2022-11-19 07:48:00,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:00,022 INFO L495 AbstractCegarLoop]: Abstraction has 4221 states and 6137 transitions. [2022-11-19 07:48:00,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:00,022 INFO L276 IsEmpty]: Start isEmpty. Operand 4221 states and 6137 transitions. [2022-11-19 07:48:00,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 07:48:00,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:00,024 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] [2022-11-19 07:48:00,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:48:00,024 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:00,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:00,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1683020412, now seen corresponding path program 1 times [2022-11-19 07:48:00,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:00,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392737912] [2022-11-19 07:48:00,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:00,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:48:00,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:00,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392737912] [2022-11-19 07:48:00,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392737912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:00,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:00,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:48:00,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193474166] [2022-11-19 07:48:00,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:00,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:48:00,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:00,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:48:00,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:48:00,188 INFO L87 Difference]: Start difference. First operand 4221 states and 6137 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:01,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:01,843 INFO L93 Difference]: Finished difference Result 12323 states and 18005 transitions. [2022-11-19 07:48:01,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:48:01,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-19 07:48:01,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:01,875 INFO L225 Difference]: With dead ends: 12323 [2022-11-19 07:48:01,875 INFO L226 Difference]: Without dead ends: 8247 [2022-11-19 07:48:01,881 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 [2022-11-19 07:48:01,882 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 564 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:01,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 249 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:48:01,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8247 states. [2022-11-19 07:48:03,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8247 to 8245. [2022-11-19 07:48:03,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8245 states, 8244 states have (on average 1.4517224648229015) internal successors, (11968), 8244 states have internal predecessors, (11968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:03,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8245 states to 8245 states and 11968 transitions. [2022-11-19 07:48:03,164 INFO L78 Accepts]: Start accepts. Automaton has 8245 states and 11968 transitions. Word has length 69 [2022-11-19 07:48:03,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:03,166 INFO L495 AbstractCegarLoop]: Abstraction has 8245 states and 11968 transitions. [2022-11-19 07:48:03,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:03,166 INFO L276 IsEmpty]: Start isEmpty. Operand 8245 states and 11968 transitions. [2022-11-19 07:48:03,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:48:03,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:03,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:03,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:48:03,173 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:03,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:03,174 INFO L85 PathProgramCache]: Analyzing trace with hash -399863285, now seen corresponding path program 1 times [2022-11-19 07:48:03,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:03,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278329703] [2022-11-19 07:48:03,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:03,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:48:05,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:05,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278329703] [2022-11-19 07:48:05,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278329703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:05,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:05,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-19 07:48:05,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112451818] [2022-11-19 07:48:05,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:05,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 07:48:05,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:05,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 07:48:05,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:48:05,430 INFO L87 Difference]: Start difference. First operand 8245 states and 11968 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:10,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:10,406 INFO L93 Difference]: Finished difference Result 21194 states and 30743 transitions. [2022-11-19 07:48:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:48:10,407 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-19 07:48:10,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:10,480 INFO L225 Difference]: With dead ends: 21194 [2022-11-19 07:48:10,480 INFO L226 Difference]: Without dead ends: 21192 [2022-11-19 07:48:10,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=250, Invalid=680, Unknown=0, NotChecked=0, Total=930 [2022-11-19 07:48:10,488 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 1022 mSDsluCounter, 1495 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:10,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1022 Valid, 1748 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 07:48:10,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21192 states. [2022-11-19 07:48:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21192 to 16316. [2022-11-19 07:48:12,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16316 states, 16315 states have (on average 1.446399019307386) internal successors, (23598), 16315 states have internal predecessors, (23598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:13,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16316 states to 16316 states and 23598 transitions. [2022-11-19 07:48:13,017 INFO L78 Accepts]: Start accepts. Automaton has 16316 states and 23598 transitions. Word has length 70 [2022-11-19 07:48:13,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:13,017 INFO L495 AbstractCegarLoop]: Abstraction has 16316 states and 23598 transitions. [2022-11-19 07:48:13,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand 16316 states and 23598 transitions. [2022-11-19 07:48:13,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:48:13,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:13,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:13,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:48:13,020 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:13,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:13,020 INFO L85 PathProgramCache]: Analyzing trace with hash -720478741, now seen corresponding path program 1 times [2022-11-19 07:48:13,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:13,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640042204] [2022-11-19 07:48:13,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:13,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:48:14,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:14,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640042204] [2022-11-19 07:48:14,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640042204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:14,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:14,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-19 07:48:14,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722464374] [2022-11-19 07:48:14,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:14,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:48:14,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:14,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:48:14,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:48:14,693 INFO L87 Difference]: Start difference. First operand 16316 states and 23598 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:20,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:20,041 INFO L93 Difference]: Finished difference Result 26707 states and 38608 transitions. [2022-11-19 07:48:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 07:48:20,042 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-19 07:48:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:20,119 INFO L225 Difference]: With dead ends: 26707 [2022-11-19 07:48:20,119 INFO L226 Difference]: Without dead ends: 26705 [2022-11-19 07:48:20,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=316, Invalid=874, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 07:48:20,131 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1198 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1198 SdHoareTripleChecker+Valid, 2045 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:20,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1198 Valid, 2045 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:48:20,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26705 states. [2022-11-19 07:48:22,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26705 to 16348. [2022-11-19 07:48:22,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16348 states, 16347 states have (on average 1.446014559246345) internal successors, (23638), 16347 states have internal predecessors, (23638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:22,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16348 states to 16348 states and 23638 transitions. [2022-11-19 07:48:22,529 INFO L78 Accepts]: Start accepts. Automaton has 16348 states and 23638 transitions. Word has length 70 [2022-11-19 07:48:22,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:22,530 INFO L495 AbstractCegarLoop]: Abstraction has 16348 states and 23638 transitions. [2022-11-19 07:48:22,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:22,531 INFO L276 IsEmpty]: Start isEmpty. Operand 16348 states and 23638 transitions. [2022-11-19 07:48:22,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:48:22,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:22,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:22,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:48:22,533 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:22,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:22,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1093759435, now seen corresponding path program 1 times [2022-11-19 07:48:22,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:22,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264284372] [2022-11-19 07:48:22,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:22,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:48:24,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:24,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264284372] [2022-11-19 07:48:24,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264284372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:24,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:24,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-19 07:48:24,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190938098] [2022-11-19 07:48:24,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:24,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 07:48:24,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:24,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 07:48:24,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:48:24,054 INFO L87 Difference]: Start difference. First operand 16348 states and 23638 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:28,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:28,847 INFO L93 Difference]: Finished difference Result 23993 states and 34652 transitions. [2022-11-19 07:48:28,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:48:28,848 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-19 07:48:28,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:28,911 INFO L225 Difference]: With dead ends: 23993 [2022-11-19 07:48:28,912 INFO L226 Difference]: Without dead ends: 23991 [2022-11-19 07:48:28,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2022-11-19 07:48:28,924 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1199 mSDsluCounter, 2099 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 2454 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:28,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 2454 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 07:48:28,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23991 states. [2022-11-19 07:48:31,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23991 to 16374. [2022-11-19 07:48:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16374 states, 16373 states have (on average 1.4457338300861173) internal successors, (23671), 16373 states have internal predecessors, (23671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:31,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16374 states to 16374 states and 23671 transitions. [2022-11-19 07:48:31,192 INFO L78 Accepts]: Start accepts. Automaton has 16374 states and 23671 transitions. Word has length 70 [2022-11-19 07:48:31,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:31,193 INFO L495 AbstractCegarLoop]: Abstraction has 16374 states and 23671 transitions. [2022-11-19 07:48:31,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:31,193 INFO L276 IsEmpty]: Start isEmpty. Operand 16374 states and 23671 transitions. [2022-11-19 07:48:31,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:48:31,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:31,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:31,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:48:31,195 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:31,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:31,196 INFO L85 PathProgramCache]: Analyzing trace with hash 207867307, now seen corresponding path program 1 times [2022-11-19 07:48:31,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:31,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280136942] [2022-11-19 07:48:31,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:31,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:32,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:48:32,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:32,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280136942] [2022-11-19 07:48:32,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280136942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:32,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:32,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-19 07:48:32,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945803497] [2022-11-19 07:48:32,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:32,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 07:48:32,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:32,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 07:48:32,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:48:32,570 INFO L87 Difference]: Start difference. First operand 16374 states and 23671 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:36,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:36,546 INFO L93 Difference]: Finished difference Result 21769 states and 31397 transitions. [2022-11-19 07:48:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:48:36,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-19 07:48:36,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:36,590 INFO L225 Difference]: With dead ends: 21769 [2022-11-19 07:48:36,591 INFO L226 Difference]: Without dead ends: 19719 [2022-11-19 07:48:36,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2022-11-19 07:48:36,603 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 889 mSDsluCounter, 1808 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 2154 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:36,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 2154 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 07:48:36,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19719 states. [2022-11-19 07:48:39,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19719 to 18250. [2022-11-19 07:48:39,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18250 states, 18249 states have (on average 1.4435311523919119) internal successors, (26343), 18249 states have internal predecessors, (26343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:39,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18250 states to 18250 states and 26343 transitions. [2022-11-19 07:48:39,090 INFO L78 Accepts]: Start accepts. Automaton has 18250 states and 26343 transitions. Word has length 70 [2022-11-19 07:48:39,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:39,091 INFO L495 AbstractCegarLoop]: Abstraction has 18250 states and 26343 transitions. [2022-11-19 07:48:39,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:39,091 INFO L276 IsEmpty]: Start isEmpty. Operand 18250 states and 26343 transitions. [2022-11-19 07:48:39,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:48:39,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:39,093 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] [2022-11-19 07:48:39,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:48:39,093 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:39,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:39,094 INFO L85 PathProgramCache]: Analyzing trace with hash -730500725, now seen corresponding path program 1 times [2022-11-19 07:48:39,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:39,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751640309] [2022-11-19 07:48:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:39,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:48:41,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:41,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751640309] [2022-11-19 07:48:41,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751640309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:41,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:41,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-11-19 07:48:41,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339570064] [2022-11-19 07:48:41,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:41,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 07:48:41,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:41,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 07:48:41,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:48:41,224 INFO L87 Difference]: Start difference. First operand 18250 states and 26343 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:47,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:47,505 INFO L93 Difference]: Finished difference Result 21488 states and 30946 transitions. [2022-11-19 07:48:47,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 07:48:47,505 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-19 07:48:47,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:47,538 INFO L225 Difference]: With dead ends: 21488 [2022-11-19 07:48:47,538 INFO L226 Difference]: Without dead ends: 21486 [2022-11-19 07:48:47,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 07:48:47,544 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 1305 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 2943 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1305 SdHoareTripleChecker+Valid, 2440 SdHoareTripleChecker+Invalid, 2959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:47,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1305 Valid, 2440 Invalid, 2959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2943 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-19 07:48:47,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21486 states. [2022-11-19 07:48:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21486 to 18268. [2022-11-19 07:48:50,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18268 states, 18267 states have (on average 1.4432035911753436) internal successors, (26363), 18267 states have internal predecessors, (26363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:50,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18268 states to 18268 states and 26363 transitions. [2022-11-19 07:48:50,074 INFO L78 Accepts]: Start accepts. Automaton has 18268 states and 26363 transitions. Word has length 70 [2022-11-19 07:48:50,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:50,074 INFO L495 AbstractCegarLoop]: Abstraction has 18268 states and 26363 transitions. [2022-11-19 07:48:50,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:50,074 INFO L276 IsEmpty]: Start isEmpty. Operand 18268 states and 26363 transitions. [2022-11-19 07:48:50,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 07:48:50,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:50,076 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] [2022-11-19 07:48:50,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:48:50,077 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:50,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:50,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1639788321, now seen corresponding path program 1 times [2022-11-19 07:48:50,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:50,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042153387] [2022-11-19 07:48:50,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:50,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:48:51,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:51,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042153387] [2022-11-19 07:48:51,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042153387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:51,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:51,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-19 07:48:51,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560515920] [2022-11-19 07:48:51,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:51,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:48:51,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:51,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:48:51,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:48:51,860 INFO L87 Difference]: Start difference. First operand 18268 states and 26363 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:48:59,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:59,905 INFO L93 Difference]: Finished difference Result 35129 states and 50679 transitions. [2022-11-19 07:48:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 07:48:59,906 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-19 07:48:59,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:59,962 INFO L225 Difference]: With dead ends: 35129 [2022-11-19 07:48:59,963 INFO L226 Difference]: Without dead ends: 35127 [2022-11-19 07:48:59,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=357, Invalid=975, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 07:48:59,970 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 907 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 2357 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:59,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 2357 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 07:49:00,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35127 states. [2022-11-19 07:49:03,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35127 to 18254. [2022-11-19 07:49:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18254 states, 18253 states have (on average 1.4433243850325974) internal successors, (26345), 18253 states have internal predecessors, (26345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:49:03,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18254 states to 18254 states and 26345 transitions. [2022-11-19 07:49:03,303 INFO L78 Accepts]: Start accepts. Automaton has 18254 states and 26345 transitions. Word has length 72 [2022-11-19 07:49:03,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:03,303 INFO L495 AbstractCegarLoop]: Abstraction has 18254 states and 26345 transitions. [2022-11-19 07:49:03,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:49:03,303 INFO L276 IsEmpty]: Start isEmpty. Operand 18254 states and 26345 transitions. [2022-11-19 07:49:03,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 07:49:03,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:03,305 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] [2022-11-19 07:49:03,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 07:49:03,306 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:03,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:03,306 INFO L85 PathProgramCache]: Analyzing trace with hash 174449855, now seen corresponding path program 1 times [2022-11-19 07:49:03,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:03,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991231605] [2022-11-19 07:49:03,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:03,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:03,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:49:05,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:05,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991231605] [2022-11-19 07:49:05,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991231605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:49:05,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:49:05,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-19 07:49:05,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26942028] [2022-11-19 07:49:05,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:49:05,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:49:05,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:49:05,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:49:05,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:49:05,018 INFO L87 Difference]: Start difference. First operand 18254 states and 26345 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:49:13,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:13,386 INFO L93 Difference]: Finished difference Result 37693 states and 54457 transitions. [2022-11-19 07:49:13,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:49:13,392 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-19 07:49:13,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:13,457 INFO L225 Difference]: With dead ends: 37693 [2022-11-19 07:49:13,457 INFO L226 Difference]: Without dead ends: 37691 [2022-11-19 07:49:13,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:49:13,466 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 1052 mSDsluCounter, 1711 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1052 SdHoareTripleChecker+Valid, 1964 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:13,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1052 Valid, 1964 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:49:13,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37691 states. [2022-11-19 07:49:17,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37691 to 18260. [2022-11-19 07:49:17,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18260 states, 18259 states have (on average 1.4432334739032806) internal successors, (26352), 18259 states have internal predecessors, (26352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:49:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18260 states to 18260 states and 26352 transitions. [2022-11-19 07:49:17,068 INFO L78 Accepts]: Start accepts. Automaton has 18260 states and 26352 transitions. Word has length 72 [2022-11-19 07:49:17,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:17,068 INFO L495 AbstractCegarLoop]: Abstraction has 18260 states and 26352 transitions. [2022-11-19 07:49:17,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:49:17,068 INFO L276 IsEmpty]: Start isEmpty. Operand 18260 states and 26352 transitions. [2022-11-19 07:49:17,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 07:49:17,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:17,070 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] [2022-11-19 07:49:17,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 07:49:17,071 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:17,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:17,071 INFO L85 PathProgramCache]: Analyzing trace with hash -711442273, now seen corresponding path program 1 times [2022-11-19 07:49:17,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:17,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810676842] [2022-11-19 07:49:17,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:17,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:49:18,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:18,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810676842] [2022-11-19 07:49:18,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810676842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:49:18,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:49:18,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-19 07:49:18,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015766057] [2022-11-19 07:49:18,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:49:18,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:49:18,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:49:18,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:49:18,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:49:18,709 INFO L87 Difference]: Start difference. First operand 18260 states and 26352 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:49:27,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:27,105 INFO L93 Difference]: Finished difference Result 40294 states and 58183 transitions. [2022-11-19 07:49:27,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:49:27,106 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-19 07:49:27,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:27,169 INFO L225 Difference]: With dead ends: 40294 [2022-11-19 07:49:27,169 INFO L226 Difference]: Without dead ends: 36196 [2022-11-19 07:49:27,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=234, Invalid=696, Unknown=0, NotChecked=0, Total=930 [2022-11-19 07:49:27,183 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 968 mSDsluCounter, 1725 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:27,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [968 Valid, 1972 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 07:49:27,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36196 states. [2022-11-19 07:49:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36196 to 23372. [2022-11-19 07:49:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23372 states, 23371 states have (on average 1.4399897308630354) internal successors, (33654), 23371 states have internal predecessors, (33654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:49:32,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23372 states to 23372 states and 33654 transitions. [2022-11-19 07:49:32,208 INFO L78 Accepts]: Start accepts. Automaton has 23372 states and 33654 transitions. Word has length 72 [2022-11-19 07:49:32,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:32,208 INFO L495 AbstractCegarLoop]: Abstraction has 23372 states and 33654 transitions. [2022-11-19 07:49:32,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:49:32,208 INFO L276 IsEmpty]: Start isEmpty. Operand 23372 states and 33654 transitions. [2022-11-19 07:49:32,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 07:49:32,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:32,210 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] [2022-11-19 07:49:32,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 07:49:32,210 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:32,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:32,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1649810305, now seen corresponding path program 1 times [2022-11-19 07:49:32,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:32,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841676400] [2022-11-19 07:49:32,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:32,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:49:33,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:33,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841676400] [2022-11-19 07:49:33,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841676400] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:49:33,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:49:33,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-19 07:49:33,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141388074] [2022-11-19 07:49:33,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:49:33,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:49:33,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:49:33,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:49:33,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:49:33,919 INFO L87 Difference]: Start difference. First operand 23372 states and 33654 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:49:44,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:44,997 INFO L93 Difference]: Finished difference Result 44674 states and 64272 transitions. [2022-11-19 07:49:44,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 07:49:44,997 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-19 07:49:44,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:45,079 INFO L225 Difference]: With dead ends: 44674 [2022-11-19 07:49:45,080 INFO L226 Difference]: Without dead ends: 44672 [2022-11-19 07:49:45,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=300, Invalid=822, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:49:45,090 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1382 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1382 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:45,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1382 Valid, 1355 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:49:45,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44672 states. [2022-11-19 07:49:50,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44672 to 23368. [2022-11-19 07:49:50,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23368 states, 23367 states have (on average 1.4399366628150811) internal successors, (33647), 23367 states have internal predecessors, (33647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:49:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23368 states to 23368 states and 33647 transitions. [2022-11-19 07:49:50,247 INFO L78 Accepts]: Start accepts. Automaton has 23368 states and 33647 transitions. Word has length 72 [2022-11-19 07:49:50,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:50,247 INFO L495 AbstractCegarLoop]: Abstraction has 23368 states and 33647 transitions. [2022-11-19 07:49:50,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:49:50,248 INFO L276 IsEmpty]: Start isEmpty. Operand 23368 states and 33647 transitions. [2022-11-19 07:49:50,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 07:49:50,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:50,249 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] [2022-11-19 07:49:50,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 07:49:50,249 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:50,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:50,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1300641951, now seen corresponding path program 1 times [2022-11-19 07:49:50,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:50,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454947523] [2022-11-19 07:49:50,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:50,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:49:52,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:52,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454947523] [2022-11-19 07:49:52,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454947523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:49:52,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:49:52,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-19 07:49:52,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429289544] [2022-11-19 07:49:52,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:49:52,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:49:52,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:49:52,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:49:52,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:49:52,074 INFO L87 Difference]: Start difference. First operand 23368 states and 33647 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:50:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:50:02,307 INFO L93 Difference]: Finished difference Result 35907 states and 51657 transitions. [2022-11-19 07:50:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 07:50:02,308 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-19 07:50:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:50:02,381 INFO L225 Difference]: With dead ends: 35907 [2022-11-19 07:50:02,382 INFO L226 Difference]: Without dead ends: 35905 [2022-11-19 07:50:02,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=317, Invalid=873, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 07:50:02,392 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 1208 mSDsluCounter, 2035 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 2405 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:50:02,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1208 Valid, 2405 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 07:50:02,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35905 states. [2022-11-19 07:50:07,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35905 to 23384. [2022-11-19 07:50:07,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23384 states, 23383 states have (on average 1.43980669717316) internal successors, (33667), 23383 states have internal predecessors, (33667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:50:07,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23384 states to 23384 states and 33667 transitions. [2022-11-19 07:50:07,804 INFO L78 Accepts]: Start accepts. Automaton has 23384 states and 33667 transitions. Word has length 72 [2022-11-19 07:50:07,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:50:07,805 INFO L495 AbstractCegarLoop]: Abstraction has 23384 states and 33667 transitions. [2022-11-19 07:50:07,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:50:07,805 INFO L276 IsEmpty]: Start isEmpty. Operand 23384 states and 33667 transitions. [2022-11-19 07:50:07,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 07:50:07,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:50:07,808 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] [2022-11-19 07:50:07,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 07:50:07,808 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:50:07,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:50:07,809 INFO L85 PathProgramCache]: Analyzing trace with hash 414749823, now seen corresponding path program 1 times [2022-11-19 07:50:07,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:50:07,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530940539] [2022-11-19 07:50:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:50:07,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:50:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:50:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:50:09,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:50:09,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530940539] [2022-11-19 07:50:09,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530940539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:50:09,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:50:09,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-19 07:50:09,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042332826] [2022-11-19 07:50:09,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:50:09,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:50:09,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:50:09,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:50:09,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:50:09,449 INFO L87 Difference]: Start difference. First operand 23384 states and 33667 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:50:21,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:50:21,559 INFO L93 Difference]: Finished difference Result 43169 states and 62127 transitions. [2022-11-19 07:50:21,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:50:21,560 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-19 07:50:21,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:50:21,629 INFO L225 Difference]: With dead ends: 43169 [2022-11-19 07:50:21,629 INFO L226 Difference]: Without dead ends: 39071 [2022-11-19 07:50:21,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=234, Invalid=696, Unknown=0, NotChecked=0, Total=930 [2022-11-19 07:50:21,646 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 1208 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:50:21,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1208 Valid, 1767 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 07:50:21,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39071 states. [2022-11-19 07:50:28,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39071 to 23409. [2022-11-19 07:50:28,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23409 states, 23408 states have (on average 1.4396360218728639) internal successors, (33699), 23408 states have internal predecessors, (33699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:50:28,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23409 states to 23409 states and 33699 transitions. [2022-11-19 07:50:28,394 INFO L78 Accepts]: Start accepts. Automaton has 23409 states and 33699 transitions. Word has length 72 [2022-11-19 07:50:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:50:28,395 INFO L495 AbstractCegarLoop]: Abstraction has 23409 states and 33699 transitions. [2022-11-19 07:50:28,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:50:28,395 INFO L276 IsEmpty]: Start isEmpty. Operand 23409 states and 33699 transitions. [2022-11-19 07:50:28,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 07:50:28,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:50:28,397 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] [2022-11-19 07:50:28,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 07:50:28,398 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:50:28,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:50:28,398 INFO L85 PathProgramCache]: Analyzing trace with hash -523618209, now seen corresponding path program 1 times [2022-11-19 07:50:28,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:50:28,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469188502] [2022-11-19 07:50:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:50:28,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:50:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:50:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:50:29,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:50:29,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469188502] [2022-11-19 07:50:29,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469188502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:50:29,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:50:29,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-19 07:50:29,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025633182] [2022-11-19 07:50:29,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:50:29,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:50:29,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:50:29,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:50:29,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:50:29,944 INFO L87 Difference]: Start difference. First operand 23409 states and 33699 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:50:43,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:50:43,454 INFO L93 Difference]: Finished difference Result 45024 states and 64735 transitions. [2022-11-19 07:50:43,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 07:50:43,454 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-19 07:50:43,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:50:43,538 INFO L225 Difference]: With dead ends: 45024 [2022-11-19 07:50:43,538 INFO L226 Difference]: Without dead ends: 45022 [2022-11-19 07:50:43,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:50:43,550 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1187 mSDsluCounter, 3156 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 3511 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:50:43,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1187 Valid, 3511 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 07:50:43,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45022 states. [2022-11-19 07:50:51,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45022 to 23430. [2022-11-19 07:50:51,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23430 states, 23429 states have (on average 1.4394980579623544) internal successors, (33726), 23429 states have internal predecessors, (33726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:50:51,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23430 states to 23430 states and 33726 transitions. [2022-11-19 07:50:51,467 INFO L78 Accepts]: Start accepts. Automaton has 23430 states and 33726 transitions. Word has length 72 [2022-11-19 07:50:51,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:50:51,467 INFO L495 AbstractCegarLoop]: Abstraction has 23430 states and 33726 transitions. [2022-11-19 07:50:51,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:50:51,467 INFO L276 IsEmpty]: Start isEmpty. Operand 23430 states and 33726 transitions. [2022-11-19 07:50:51,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 07:50:51,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:50:51,469 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] [2022-11-19 07:50:51,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 07:50:51,470 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:50:51,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:50:51,470 INFO L85 PathProgramCache]: Analyzing trace with hash 140914783, now seen corresponding path program 1 times [2022-11-19 07:50:51,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:50:51,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822977693] [2022-11-19 07:50:51,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:50:51,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:50:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:50:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:50:53,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:50:53,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822977693] [2022-11-19 07:50:53,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822977693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:50:53,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:50:53,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-19 07:50:53,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112701504] [2022-11-19 07:50:53,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:50:53,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:50:53,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:50:53,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:50:53,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:50:53,071 INFO L87 Difference]: Start difference. First operand 23430 states and 33726 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:00,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:00,745 INFO L93 Difference]: Finished difference Result 30749 states and 44181 transitions. [2022-11-19 07:51:00,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:51:00,746 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-19 07:51:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:00,792 INFO L225 Difference]: With dead ends: 30749 [2022-11-19 07:51:00,792 INFO L226 Difference]: Without dead ends: 28699 [2022-11-19 07:51:00,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:51:00,802 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 833 mSDsluCounter, 2180 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 2537 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:00,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 2537 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:51:00,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28699 states. [2022-11-19 07:51:06,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28699 to 23443. [2022-11-19 07:51:06,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23443 states, 23442 states have (on average 1.439382305264056) internal successors, (33742), 23442 states have internal predecessors, (33742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:06,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23443 states to 23443 states and 33742 transitions. [2022-11-19 07:51:06,586 INFO L78 Accepts]: Start accepts. Automaton has 23443 states and 33742 transitions. Word has length 72 [2022-11-19 07:51:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:06,586 INFO L495 AbstractCegarLoop]: Abstraction has 23443 states and 33742 transitions. [2022-11-19 07:51:06,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 23443 states and 33742 transitions. [2022-11-19 07:51:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 07:51:06,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:06,588 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] [2022-11-19 07:51:06,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-19 07:51:06,589 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:06,590 INFO L85 PathProgramCache]: Analyzing trace with hash -797453249, now seen corresponding path program 1 times [2022-11-19 07:51:06,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:06,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103777628] [2022-11-19 07:51:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:06,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:51:07,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:07,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103777628] [2022-11-19 07:51:07,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103777628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:51:07,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:51:07,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-19 07:51:07,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52685405] [2022-11-19 07:51:07,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:51:07,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:51:07,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:07,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:51:07,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:51:07,932 INFO L87 Difference]: Start difference. First operand 23443 states and 33742 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:18,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:18,003 INFO L93 Difference]: Finished difference Result 35905 states and 51656 transitions. [2022-11-19 07:51:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:51:18,004 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-19 07:51:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:18,068 INFO L225 Difference]: With dead ends: 35905 [2022-11-19 07:51:18,069 INFO L226 Difference]: Without dead ends: 35903 [2022-11-19 07:51:18,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:51:18,079 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 1252 mSDsluCounter, 1642 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:18,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1252 Valid, 1991 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:51:18,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35903 states. [2022-11-19 07:51:24,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35903 to 23451. [2022-11-19 07:51:24,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23451 states, 23450 states have (on average 1.439360341151386) internal successors, (33753), 23450 states have internal predecessors, (33753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:24,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23451 states to 23451 states and 33753 transitions. [2022-11-19 07:51:24,947 INFO L78 Accepts]: Start accepts. Automaton has 23451 states and 33753 transitions. Word has length 72 [2022-11-19 07:51:24,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:24,948 INFO L495 AbstractCegarLoop]: Abstraction has 23451 states and 33753 transitions. [2022-11-19 07:51:24,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:24,948 INFO L276 IsEmpty]: Start isEmpty. Operand 23451 states and 33753 transitions. [2022-11-19 07:51:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 07:51:24,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:24,950 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] [2022-11-19 07:51:24,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-19 07:51:24,950 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:24,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:24,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1736263649, now seen corresponding path program 1 times [2022-11-19 07:51:24,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:24,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818649242] [2022-11-19 07:51:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:24,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:51:26,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:26,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818649242] [2022-11-19 07:51:26,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818649242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:51:26,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:51:26,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-19 07:51:26,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227544285] [2022-11-19 07:51:26,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:51:26,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:51:26,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:26,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:51:26,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:51:26,355 INFO L87 Difference]: Start difference. First operand 23451 states and 33753 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:35,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:35,464 INFO L93 Difference]: Finished difference Result 28751 states and 41271 transitions. [2022-11-19 07:51:35,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:51:35,465 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-19 07:51:35,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:35,512 INFO L225 Difference]: With dead ends: 28751 [2022-11-19 07:51:35,512 INFO L226 Difference]: Without dead ends: 28749 [2022-11-19 07:51:35,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:51:35,520 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 981 mSDsluCounter, 2798 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 3218 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:35,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [981 Valid, 3218 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 07:51:35,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28749 states. [2022-11-19 07:51:42,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28749 to 24487. [2022-11-19 07:51:42,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24487 states, 24486 states have (on average 1.437882871845136) internal successors, (35208), 24486 states have internal predecessors, (35208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24487 states to 24487 states and 35208 transitions. [2022-11-19 07:51:42,542 INFO L78 Accepts]: Start accepts. Automaton has 24487 states and 35208 transitions. Word has length 72 [2022-11-19 07:51:42,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:42,543 INFO L495 AbstractCegarLoop]: Abstraction has 24487 states and 35208 transitions. [2022-11-19 07:51:42,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:42,543 INFO L276 IsEmpty]: Start isEmpty. Operand 24487 states and 35208 transitions. [2022-11-19 07:51:42,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:51:42,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:42,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:42,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-19 07:51:42,546 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:42,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:42,547 INFO L85 PathProgramCache]: Analyzing trace with hash 436842948, now seen corresponding path program 1 times [2022-11-19 07:51:42,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:42,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536025317] [2022-11-19 07:51:42,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:42,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:51:42,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:42,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536025317] [2022-11-19 07:51:42,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536025317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:51:42,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:51:42,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:51:42,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451048408] [2022-11-19 07:51:42,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:51:42,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:51:42,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:42,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:51:42,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:51:42,596 INFO L87 Difference]: Start difference. First operand 24487 states and 35208 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:49,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:51:49,481 INFO L93 Difference]: Finished difference Result 43335 states and 62446 transitions. [2022-11-19 07:51:49,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:51:49,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-19 07:51:49,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:51:49,519 INFO L225 Difference]: With dead ends: 43335 [2022-11-19 07:51:49,519 INFO L226 Difference]: Without dead ends: 23783 [2022-11-19 07:51:49,537 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 [2022-11-19 07:51:49,538 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 148 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:51:49,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 371 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:51:49,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23783 states. [2022-11-19 07:51:56,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23783 to 23781. [2022-11-19 07:51:56,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23781 states, 23780 states have (on average 1.4362489486963834) internal successors, (34154), 23780 states have internal predecessors, (34154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23781 states to 23781 states and 34154 transitions. [2022-11-19 07:51:56,514 INFO L78 Accepts]: Start accepts. Automaton has 23781 states and 34154 transitions. Word has length 73 [2022-11-19 07:51:56,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:51:56,515 INFO L495 AbstractCegarLoop]: Abstraction has 23781 states and 34154 transitions. [2022-11-19 07:51:56,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:51:56,515 INFO L276 IsEmpty]: Start isEmpty. Operand 23781 states and 34154 transitions. [2022-11-19 07:51:56,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:51:56,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:56,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:56,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-19 07:51:56,517 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:56,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:56,518 INFO L85 PathProgramCache]: Analyzing trace with hash 395705214, now seen corresponding path program 1 times [2022-11-19 07:51:56,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:56,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003049551] [2022-11-19 07:51:56,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:56,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:51:56,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:56,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003049551] [2022-11-19 07:51:56,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003049551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:51:56,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:51:56,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:51:56,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827187689] [2022-11-19 07:51:56,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:51:56,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:51:56,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:56,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:51:56,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:51:56,573 INFO L87 Difference]: Start difference. First operand 23781 states and 34154 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:03,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:03,381 INFO L93 Difference]: Finished difference Result 43153 states and 62114 transitions. [2022-11-19 07:52:03,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:52:03,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-19 07:52:03,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:03,420 INFO L225 Difference]: With dead ends: 43153 [2022-11-19 07:52:03,420 INFO L226 Difference]: Without dead ends: 23074 [2022-11-19 07:52:03,441 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 [2022-11-19 07:52:03,442 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 138 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:03,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 375 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:52:03,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23074 states. [2022-11-19 07:52:09,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23074 to 23072. [2022-11-19 07:52:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23072 states, 23071 states have (on average 1.4342681288197303) internal successors, (33090), 23071 states have internal predecessors, (33090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23072 states to 23072 states and 33090 transitions. [2022-11-19 07:52:09,955 INFO L78 Accepts]: Start accepts. Automaton has 23072 states and 33090 transitions. Word has length 73 [2022-11-19 07:52:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:09,955 INFO L495 AbstractCegarLoop]: Abstraction has 23072 states and 33090 transitions. [2022-11-19 07:52:09,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:09,956 INFO L276 IsEmpty]: Start isEmpty. Operand 23072 states and 33090 transitions. [2022-11-19 07:52:09,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:52:09,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:09,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:09,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-19 07:52:09,957 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:09,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:09,958 INFO L85 PathProgramCache]: Analyzing trace with hash 59046075, now seen corresponding path program 1 times [2022-11-19 07:52:09,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:09,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915602199] [2022-11-19 07:52:09,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:09,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:52:10,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:10,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915602199] [2022-11-19 07:52:10,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915602199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:10,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:10,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:52:10,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159085288] [2022-11-19 07:52:10,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:10,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:52:10,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:10,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:52:10,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:52:10,008 INFO L87 Difference]: Start difference. First operand 23072 states and 33090 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:17,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:17,018 INFO L93 Difference]: Finished difference Result 44327 states and 63786 transitions. [2022-11-19 07:52:17,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:52:17,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-19 07:52:17,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:17,053 INFO L225 Difference]: With dead ends: 44327 [2022-11-19 07:52:17,053 INFO L226 Difference]: Without dead ends: 22475 [2022-11-19 07:52:17,068 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 [2022-11-19 07:52:17,068 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 132 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:17,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 365 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:52:17,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22475 states. [2022-11-19 07:52:24,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22475 to 22359. [2022-11-19 07:52:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22359 states, 22358 states have (on average 1.4326415600679847) internal successors, (32031), 22358 states have internal predecessors, (32031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:24,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22359 states to 22359 states and 32031 transitions. [2022-11-19 07:52:24,270 INFO L78 Accepts]: Start accepts. Automaton has 22359 states and 32031 transitions. Word has length 73 [2022-11-19 07:52:24,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:24,270 INFO L495 AbstractCegarLoop]: Abstraction has 22359 states and 32031 transitions. [2022-11-19 07:52:24,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:24,270 INFO L276 IsEmpty]: Start isEmpty. Operand 22359 states and 32031 transitions. [2022-11-19 07:52:24,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:52:24,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:24,271 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] [2022-11-19 07:52:24,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-19 07:52:24,272 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:24,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:24,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1687568749, now seen corresponding path program 1 times [2022-11-19 07:52:24,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:24,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664979823] [2022-11-19 07:52:24,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:24,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:52:27,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:27,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664979823] [2022-11-19 07:52:27,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664979823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:27,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:27,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-19 07:52:27,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657995517] [2022-11-19 07:52:27,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:27,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 07:52:27,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:27,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 07:52:27,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:52:27,817 INFO L87 Difference]: Start difference. First operand 22359 states and 32031 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:43,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:43,687 INFO L93 Difference]: Finished difference Result 33817 states and 48450 transitions. [2022-11-19 07:52:43,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-19 07:52:43,687 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2022-11-19 07:52:43,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:43,745 INFO L225 Difference]: With dead ends: 33817 [2022-11-19 07:52:43,745 INFO L226 Difference]: Without dead ends: 33815 [2022-11-19 07:52:43,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=565, Invalid=1885, Unknown=0, NotChecked=0, Total=2450 [2022-11-19 07:52:43,754 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 1096 mSDsluCounter, 2016 mSDsCounter, 0 mSdLazyCounter, 3009 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 2237 SdHoareTripleChecker+Invalid, 3028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:43,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 2237 Invalid, 3028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 3009 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-19 07:52:43,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33815 states. [2022-11-19 07:52:50,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33815 to 22339. [2022-11-19 07:52:50,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22339 states, 22338 states have (on average 1.4329393857999821) internal successors, (32009), 22338 states have internal predecessors, (32009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:50,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22339 states to 22339 states and 32009 transitions. [2022-11-19 07:52:50,059 INFO L78 Accepts]: Start accepts. Automaton has 22339 states and 32009 transitions. Word has length 74 [2022-11-19 07:52:50,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:50,060 INFO L495 AbstractCegarLoop]: Abstraction has 22339 states and 32009 transitions. [2022-11-19 07:52:50,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:52:50,060 INFO L276 IsEmpty]: Start isEmpty. Operand 22339 states and 32009 transitions. [2022-11-19 07:52:50,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:52:50,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:50,062 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] [2022-11-19 07:52:50,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-19 07:52:50,062 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:50,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:50,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1721506419, now seen corresponding path program 1 times [2022-11-19 07:52:50,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:50,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192049270] [2022-11-19 07:52:50,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:50,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:52:52,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:52,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192049270] [2022-11-19 07:52:52,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192049270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:52,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:52,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-11-19 07:52:52,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558972568] [2022-11-19 07:52:52,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:52,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 07:52:52,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:52,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 07:52:52,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:52:52,146 INFO L87 Difference]: Start difference. First operand 22339 states and 32009 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:04,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:04,132 INFO L93 Difference]: Finished difference Result 29157 states and 41712 transitions. [2022-11-19 07:53:04,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 07:53:04,133 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2022-11-19 07:53:04,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:04,186 INFO L225 Difference]: With dead ends: 29157 [2022-11-19 07:53:04,186 INFO L226 Difference]: Without dead ends: 27235 [2022-11-19 07:53:04,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=380, Invalid=1342, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 07:53:04,195 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 884 mSDsluCounter, 1959 mSDsCounter, 0 mSdLazyCounter, 2576 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 2183 SdHoareTripleChecker+Invalid, 2595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:04,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 2183 Invalid, 2595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2576 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-19 07:53:04,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27235 states. [2022-11-19 07:53:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27235 to 22342. [2022-11-19 07:53:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22342 states, 22341 states have (on average 1.4329260104740165) internal successors, (32013), 22341 states have internal predecessors, (32013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22342 states to 22342 states and 32013 transitions. [2022-11-19 07:53:11,210 INFO L78 Accepts]: Start accepts. Automaton has 22342 states and 32013 transitions. Word has length 74 [2022-11-19 07:53:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:11,210 INFO L495 AbstractCegarLoop]: Abstraction has 22342 states and 32013 transitions. [2022-11-19 07:53:11,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:11,210 INFO L276 IsEmpty]: Start isEmpty. Operand 22342 states and 32013 transitions. [2022-11-19 07:53:11,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:53:11,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:11,212 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] [2022-11-19 07:53:11,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-19 07:53:11,212 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:11,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:11,213 INFO L85 PathProgramCache]: Analyzing trace with hash 783138387, now seen corresponding path program 1 times [2022-11-19 07:53:11,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:11,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233139363] [2022-11-19 07:53:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:11,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:53:14,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:14,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233139363] [2022-11-19 07:53:14,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233139363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:53:14,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:53:14,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-11-19 07:53:14,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673375090] [2022-11-19 07:53:14,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:53:14,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 07:53:14,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:53:14,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 07:53:14,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-11-19 07:53:14,235 INFO L87 Difference]: Start difference. First operand 22342 states and 32013 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:27,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:27,765 INFO L93 Difference]: Finished difference Result 25472 states and 36408 transitions. [2022-11-19 07:53:27,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 07:53:27,766 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2022-11-19 07:53:27,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:27,802 INFO L225 Difference]: With dead ends: 25472 [2022-11-19 07:53:27,802 INFO L226 Difference]: Without dead ends: 25470 [2022-11-19 07:53:27,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=625, Invalid=1925, Unknown=0, NotChecked=0, Total=2550 [2022-11-19 07:53:27,809 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 1308 mSDsluCounter, 2157 mSDsCounter, 0 mSdLazyCounter, 3003 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1308 SdHoareTripleChecker+Valid, 2383 SdHoareTripleChecker+Invalid, 3032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:27,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1308 Valid, 2383 Invalid, 3032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3003 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-19 07:53:27,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25470 states. [2022-11-19 07:53:33,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25470 to 22352. [2022-11-19 07:53:33,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22352 states, 22351 states have (on average 1.4328665384099146) internal successors, (32026), 22351 states have internal predecessors, (32026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:33,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22352 states to 22352 states and 32026 transitions. [2022-11-19 07:53:33,942 INFO L78 Accepts]: Start accepts. Automaton has 22352 states and 32026 transitions. Word has length 74 [2022-11-19 07:53:33,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:33,942 INFO L495 AbstractCegarLoop]: Abstraction has 22352 states and 32026 transitions. [2022-11-19 07:53:33,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:33,942 INFO L276 IsEmpty]: Start isEmpty. Operand 22352 states and 32026 transitions. [2022-11-19 07:53:33,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:53:33,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:33,943 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] [2022-11-19 07:53:33,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-19 07:53:33,943 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:33,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:33,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1447671379, now seen corresponding path program 1 times [2022-11-19 07:53:33,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:33,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965502776] [2022-11-19 07:53:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:33,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:53:35,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:35,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965502776] [2022-11-19 07:53:35,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965502776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:53:35,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:53:35,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-19 07:53:35,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022303747] [2022-11-19 07:53:35,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:53:35,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:53:35,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:53:35,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:53:35,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:53:35,350 INFO L87 Difference]: Start difference. First operand 22352 states and 32026 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:44,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:44,922 INFO L93 Difference]: Finished difference Result 29152 states and 41709 transitions. [2022-11-19 07:53:44,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 07:53:44,922 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2022-11-19 07:53:44,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:44,971 INFO L225 Difference]: With dead ends: 29152 [2022-11-19 07:53:44,971 INFO L226 Difference]: Without dead ends: 27230 [2022-11-19 07:53:44,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:53:44,979 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 851 mSDsluCounter, 2705 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 3041 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:44,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 3041 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 07:53:45,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27230 states. [2022-11-19 07:53:51,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27230 to 22358. [2022-11-19 07:53:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22358 states, 22357 states have (on average 1.4327950977322539) internal successors, (32033), 22357 states have internal predecessors, (32033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:51,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22358 states to 22358 states and 32033 transitions. [2022-11-19 07:53:51,589 INFO L78 Accepts]: Start accepts. Automaton has 22358 states and 32033 transitions. Word has length 74 [2022-11-19 07:53:51,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:51,589 INFO L495 AbstractCegarLoop]: Abstraction has 22358 states and 32033 transitions. [2022-11-19 07:53:51,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:53:51,590 INFO L276 IsEmpty]: Start isEmpty. Operand 22358 states and 32033 transitions. [2022-11-19 07:53:51,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:53:51,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:51,591 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] [2022-11-19 07:53:51,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-19 07:53:51,592 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:51,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:51,592 INFO L85 PathProgramCache]: Analyzing trace with hash 509303347, now seen corresponding path program 1 times [2022-11-19 07:53:51,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:51,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465415849] [2022-11-19 07:53:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:51,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:53:53,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:53,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465415849] [2022-11-19 07:53:53,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465415849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:53:53,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:53:53,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-19 07:53:53,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260482368] [2022-11-19 07:53:53,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:53:53,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:53:53,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:53:53,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:53:53,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:53:53,065 INFO L87 Difference]: Start difference. First operand 22358 states and 32033 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:07,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:07,424 INFO L93 Difference]: Finished difference Result 40261 states and 57530 transitions. [2022-11-19 07:54:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 07:54:07,425 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2022-11-19 07:54:07,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:07,493 INFO L225 Difference]: With dead ends: 40261 [2022-11-19 07:54:07,493 INFO L226 Difference]: Without dead ends: 40259 [2022-11-19 07:54:07,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:54:07,503 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 1013 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1013 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:07,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1013 Valid, 1596 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 07:54:07,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40259 states. [2022-11-19 07:54:13,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40259 to 22358. [2022-11-19 07:54:13,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22358 states, 22357 states have (on average 1.4327950977322539) internal successors, (32033), 22357 states have internal predecessors, (32033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22358 states to 22358 states and 32033 transitions. [2022-11-19 07:54:13,567 INFO L78 Accepts]: Start accepts. Automaton has 22358 states and 32033 transitions. Word has length 74 [2022-11-19 07:54:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:13,568 INFO L495 AbstractCegarLoop]: Abstraction has 22358 states and 32033 transitions. [2022-11-19 07:54:13,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:13,568 INFO L276 IsEmpty]: Start isEmpty. Operand 22358 states and 32033 transitions. [2022-11-19 07:54:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:54:13,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:13,569 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] [2022-11-19 07:54:13,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-19 07:54:13,570 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:13,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:13,570 INFO L85 PathProgramCache]: Analyzing trace with hash -429507053, now seen corresponding path program 1 times [2022-11-19 07:54:13,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:13,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601830038] [2022-11-19 07:54:13,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:13,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:54:16,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:16,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601830038] [2022-11-19 07:54:16,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601830038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:54:16,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:54:16,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-19 07:54:16,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671857634] [2022-11-19 07:54:16,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:54:16,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 07:54:16,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:16,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 07:54:16,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:54:16,278 INFO L87 Difference]: Start difference. First operand 22358 states and 32033 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:27,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:27,498 INFO L93 Difference]: Finished difference Result 25430 states and 36364 transitions. [2022-11-19 07:54:27,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-19 07:54:27,499 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2022-11-19 07:54:27,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:27,533 INFO L225 Difference]: With dead ends: 25430 [2022-11-19 07:54:27,534 INFO L226 Difference]: Without dead ends: 25428 [2022-11-19 07:54:27,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=567, Invalid=1883, Unknown=0, NotChecked=0, Total=2450 [2022-11-19 07:54:27,540 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1304 mSDsluCounter, 3052 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1304 SdHoareTripleChecker+Valid, 3377 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:27,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1304 Valid, 3377 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-19 07:54:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25428 states. [2022-11-19 07:54:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25428 to 22364. [2022-11-19 07:54:33,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22364 states, 22363 states have (on average 1.4327236953897062) internal successors, (32040), 22363 states have internal predecessors, (32040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:33,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22364 states to 22364 states and 32040 transitions. [2022-11-19 07:54:33,294 INFO L78 Accepts]: Start accepts. Automaton has 22364 states and 32040 transitions. Word has length 74 [2022-11-19 07:54:33,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:33,294 INFO L495 AbstractCegarLoop]: Abstraction has 22364 states and 32040 transitions. [2022-11-19 07:54:33,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:33,295 INFO L276 IsEmpty]: Start isEmpty. Operand 22364 states and 32040 transitions. [2022-11-19 07:54:33,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:54:33,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:33,296 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] [2022-11-19 07:54:33,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-19 07:54:33,296 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:33,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:33,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1386517043, now seen corresponding path program 1 times [2022-11-19 07:54:33,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:33,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112338180] [2022-11-19 07:54:33,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:33,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:54:36,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:36,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112338180] [2022-11-19 07:54:36,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112338180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:54:36,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:54:36,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-11-19 07:54:36,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464703786] [2022-11-19 07:54:36,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:54:36,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 07:54:36,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:36,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 07:54:36,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:54:36,443 INFO L87 Difference]: Start difference. First operand 22364 states and 32040 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:48,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:48,373 INFO L93 Difference]: Finished difference Result 40716 states and 58412 transitions. [2022-11-19 07:54:48,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-19 07:54:48,374 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2022-11-19 07:54:48,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:48,406 INFO L225 Difference]: With dead ends: 40716 [2022-11-19 07:54:48,406 INFO L226 Difference]: Without dead ends: 24070 [2022-11-19 07:54:48,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2022-11-19 07:54:48,421 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 755 mSDsluCounter, 3358 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 3707 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:48,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [755 Valid, 3707 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1865 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-19 07:54:48,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24070 states. [2022-11-19 07:54:53,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24070 to 20909. [2022-11-19 07:54:53,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20909 states, 20908 states have (on average 1.4320355844652763) internal successors, (29941), 20908 states have internal predecessors, (29941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:53,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20909 states to 20909 states and 29941 transitions. [2022-11-19 07:54:53,931 INFO L78 Accepts]: Start accepts. Automaton has 20909 states and 29941 transitions. Word has length 74 [2022-11-19 07:54:53,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:53,931 INFO L495 AbstractCegarLoop]: Abstraction has 20909 states and 29941 transitions. [2022-11-19 07:54:53,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:53,931 INFO L276 IsEmpty]: Start isEmpty. Operand 20909 states and 29941 transitions. [2022-11-19 07:54:53,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:54:53,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:53,932 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] [2022-11-19 07:54:53,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-19 07:54:53,933 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:53,933 INFO L85 PathProgramCache]: Analyzing trace with hash 448149011, now seen corresponding path program 1 times [2022-11-19 07:54:53,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:53,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429122752] [2022-11-19 07:54:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:53,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:54:55,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:55,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429122752] [2022-11-19 07:54:55,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429122752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:54:55,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:54:55,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-19 07:54:55,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709977568] [2022-11-19 07:54:55,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:54:55,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:54:55,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:55,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:54:55,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:54:55,095 INFO L87 Difference]: Start difference. First operand 20909 states and 29941 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:04,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:04,502 INFO L93 Difference]: Finished difference Result 29866 states and 42693 transitions. [2022-11-19 07:55:04,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 07:55:04,502 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2022-11-19 07:55:04,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:04,538 INFO L225 Difference]: With dead ends: 29866 [2022-11-19 07:55:04,538 INFO L226 Difference]: Without dead ends: 29864 [2022-11-19 07:55:04,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=877, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 07:55:04,543 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 856 mSDsluCounter, 2367 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 2714 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:04,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 2714 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:55:04,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29864 states. [2022-11-19 07:55:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29864 to 20909. [2022-11-19 07:55:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20909 states, 20908 states have (on average 1.4320355844652763) internal successors, (29941), 20908 states have internal predecessors, (29941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:09,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20909 states to 20909 states and 29941 transitions. [2022-11-19 07:55:09,888 INFO L78 Accepts]: Start accepts. Automaton has 20909 states and 29941 transitions. Word has length 74 [2022-11-19 07:55:09,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:09,888 INFO L495 AbstractCegarLoop]: Abstraction has 20909 states and 29941 transitions. [2022-11-19 07:55:09,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:09,889 INFO L276 IsEmpty]: Start isEmpty. Operand 20909 states and 29941 transitions. [2022-11-19 07:55:09,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:55:09,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:09,890 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] [2022-11-19 07:55:09,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-19 07:55:09,890 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:55:09,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:09,890 INFO L85 PathProgramCache]: Analyzing trace with hash -490661389, now seen corresponding path program 1 times [2022-11-19 07:55:09,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:55:09,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262383728] [2022-11-19 07:55:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:09,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:55:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:10,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:55:10,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262383728] [2022-11-19 07:55:10,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262383728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:10,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:10,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-19 07:55:10,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624425480] [2022-11-19 07:55:10,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:10,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:55:10,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:55:10,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:55:10,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:55:10,998 INFO L87 Difference]: Start difference. First operand 20909 states and 29941 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:19,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:19,346 INFO L93 Difference]: Finished difference Result 25854 states and 36931 transitions. [2022-11-19 07:55:19,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 07:55:19,347 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2022-11-19 07:55:19,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:19,380 INFO L225 Difference]: With dead ends: 25854 [2022-11-19 07:55:19,380 INFO L226 Difference]: Without dead ends: 25852 [2022-11-19 07:55:19,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:55:19,385 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 794 mSDsluCounter, 2764 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 3172 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:19,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 3172 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 07:55:19,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25852 states. [2022-11-19 07:55:24,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25852 to 20909. [2022-11-19 07:55:24,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20909 states, 20908 states have (on average 1.4320355844652763) internal successors, (29941), 20908 states have internal predecessors, (29941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:24,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20909 states to 20909 states and 29941 transitions. [2022-11-19 07:55:24,849 INFO L78 Accepts]: Start accepts. Automaton has 20909 states and 29941 transitions. Word has length 74 [2022-11-19 07:55:24,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:24,850 INFO L495 AbstractCegarLoop]: Abstraction has 20909 states and 29941 transitions. [2022-11-19 07:55:24,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:24,850 INFO L276 IsEmpty]: Start isEmpty. Operand 20909 states and 29941 transitions. [2022-11-19 07:55:24,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:55:24,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:24,851 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] [2022-11-19 07:55:24,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-19 07:55:24,851 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:55:24,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:24,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1653129773, now seen corresponding path program 1 times [2022-11-19 07:55:24,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:55:24,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276609355] [2022-11-19 07:55:24,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:24,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:55:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:27,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:55:27,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276609355] [2022-11-19 07:55:27,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276609355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:27,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:27,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-19 07:55:27,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080178393] [2022-11-19 07:55:27,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:27,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 07:55:27,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:55:27,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 07:55:27,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:55:27,349 INFO L87 Difference]: Start difference. First operand 20909 states and 29941 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:38,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:38,251 INFO L93 Difference]: Finished difference Result 25902 states and 36980 transitions. [2022-11-19 07:55:38,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-19 07:55:38,252 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2022-11-19 07:55:38,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:38,288 INFO L225 Difference]: With dead ends: 25902 [2022-11-19 07:55:38,288 INFO L226 Difference]: Without dead ends: 25900 [2022-11-19 07:55:38,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=495, Invalid=1667, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 07:55:38,294 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 951 mSDsluCounter, 2253 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 2572 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:38,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 2572 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1479 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-19 07:55:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2022-11-19 07:55:43,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 20915. [2022-11-19 07:55:43,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20915 states, 20914 states have (on average 1.4319594529979918) internal successors, (29948), 20914 states have internal predecessors, (29948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:44,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20915 states to 20915 states and 29948 transitions. [2022-11-19 07:55:44,003 INFO L78 Accepts]: Start accepts. Automaton has 20915 states and 29948 transitions. Word has length 74 [2022-11-19 07:55:44,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:44,004 INFO L495 AbstractCegarLoop]: Abstraction has 20915 states and 29948 transitions. [2022-11-19 07:55:44,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:44,004 INFO L276 IsEmpty]: Start isEmpty. Operand 20915 states and 29948 transitions. [2022-11-19 07:55:44,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-19 07:55:44,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:44,005 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] [2022-11-19 07:55:44,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-19 07:55:44,005 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:55:44,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:44,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1902531037, now seen corresponding path program 1 times [2022-11-19 07:55:44,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:55:44,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081527696] [2022-11-19 07:55:44,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:44,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:55:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:44,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:55:44,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081527696] [2022-11-19 07:55:44,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081527696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:44,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:44,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:55:44,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996344377] [2022-11-19 07:55:44,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:44,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:55:44,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:55:44,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:55:44,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:44,044 INFO L87 Difference]: Start difference. First operand 20915 states and 29948 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:49,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:49,624 INFO L93 Difference]: Finished difference Result 37139 states and 53317 transitions. [2022-11-19 07:55:49,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:55:49,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2022-11-19 07:55:49,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:49,648 INFO L225 Difference]: With dead ends: 37139 [2022-11-19 07:55:49,648 INFO L226 Difference]: Without dead ends: 20143 [2022-11-19 07:55:49,663 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 [2022-11-19 07:55:49,663 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 137 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:49,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 351 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:55:49,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20143 states. [2022-11-19 07:55:55,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20143 to 20141. [2022-11-19 07:55:55,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20141 states, 20140 states have (on average 1.4298907646474677) internal successors, (28798), 20140 states have internal predecessors, (28798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20141 states to 20141 states and 28798 transitions. [2022-11-19 07:55:55,178 INFO L78 Accepts]: Start accepts. Automaton has 20141 states and 28798 transitions. Word has length 75 [2022-11-19 07:55:55,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:55,178 INFO L495 AbstractCegarLoop]: Abstraction has 20141 states and 28798 transitions. [2022-11-19 07:55:55,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:55,178 INFO L276 IsEmpty]: Start isEmpty. Operand 20141 states and 28798 transitions. [2022-11-19 07:55:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 07:55:55,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:55,179 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] [2022-11-19 07:55:55,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-19 07:55:55,180 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:55:55,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:55,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1245811929, now seen corresponding path program 1 times [2022-11-19 07:55:55,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:55:55,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872707559] [2022-11-19 07:55:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:55,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:55:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:00,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:00,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872707559] [2022-11-19 07:56:00,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872707559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:00,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:00,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-11-19 07:56:00,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361504357] [2022-11-19 07:56:00,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:00,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 07:56:00,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:00,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 07:56:00,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 07:56:00,360 INFO L87 Difference]: Start difference. First operand 20141 states and 28798 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:16,924 INFO L93 Difference]: Finished difference Result 25081 states and 35829 transitions. [2022-11-19 07:56:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-19 07:56:16,925 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-19 07:56:16,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:16,954 INFO L225 Difference]: With dead ends: 25081 [2022-11-19 07:56:16,954 INFO L226 Difference]: Without dead ends: 23223 [2022-11-19 07:56:16,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1063, Invalid=3359, Unknown=0, NotChecked=0, Total=4422 [2022-11-19 07:56:16,961 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 1228 mSDsluCounter, 3690 mSDsCounter, 0 mSdLazyCounter, 2624 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 4035 SdHoareTripleChecker+Invalid, 2643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:16,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1228 Valid, 4035 Invalid, 2643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2624 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-19 07:56:16,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23223 states. [2022-11-19 07:56:22,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23223 to 20125. [2022-11-19 07:56:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20125 states, 20124 states have (on average 1.4301828662293778) internal successors, (28781), 20124 states have internal predecessors, (28781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:22,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20125 states to 20125 states and 28781 transitions. [2022-11-19 07:56:22,549 INFO L78 Accepts]: Start accepts. Automaton has 20125 states and 28781 transitions. Word has length 76 [2022-11-19 07:56:22,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:22,549 INFO L495 AbstractCegarLoop]: Abstraction has 20125 states and 28781 transitions. [2022-11-19 07:56:22,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:22,549 INFO L276 IsEmpty]: Start isEmpty. Operand 20125 states and 28781 transitions. [2022-11-19 07:56:22,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 07:56:22,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:22,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:22,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-19 07:56:22,551 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:22,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:22,551 INFO L85 PathProgramCache]: Analyzing trace with hash 2110787335, now seen corresponding path program 1 times [2022-11-19 07:56:22,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:22,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456643923] [2022-11-19 07:56:22,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:22,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:29,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:29,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456643923] [2022-11-19 07:56:29,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456643923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:29,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:29,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-11-19 07:56:29,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050639845] [2022-11-19 07:56:29,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:29,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 07:56:29,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:29,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 07:56:29,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:56:29,203 INFO L87 Difference]: Start difference. First operand 20125 states and 28781 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:48,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:48,793 INFO L93 Difference]: Finished difference Result 23137 states and 33019 transitions. [2022-11-19 07:56:48,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-19 07:56:48,793 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-19 07:56:48,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:48,825 INFO L225 Difference]: With dead ends: 23137 [2022-11-19 07:56:48,825 INFO L226 Difference]: Without dead ends: 23135 [2022-11-19 07:56:48,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1114, Invalid=3176, Unknown=0, NotChecked=0, Total=4290 [2022-11-19 07:56:48,832 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 1513 mSDsluCounter, 2507 mSDsCounter, 0 mSdLazyCounter, 3441 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 2846 SdHoareTripleChecker+Invalid, 3465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:48,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1513 Valid, 2846 Invalid, 3465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3441 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-19 07:56:48,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23135 states. [2022-11-19 07:56:54,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23135 to 20115. [2022-11-19 07:56:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20115 states, 20114 states have (on average 1.4302973053594512) internal successors, (28769), 20114 states have internal predecessors, (28769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20115 states to 20115 states and 28769 transitions. [2022-11-19 07:56:54,956 INFO L78 Accepts]: Start accepts. Automaton has 20115 states and 28769 transitions. Word has length 76 [2022-11-19 07:56:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:54,956 INFO L495 AbstractCegarLoop]: Abstraction has 20115 states and 28769 transitions. [2022-11-19 07:56:54,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:54,956 INFO L276 IsEmpty]: Start isEmpty. Operand 20115 states and 28769 transitions. [2022-11-19 07:56:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 07:56:54,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:54,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:54,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-19 07:56:54,958 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:54,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:54,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1171976935, now seen corresponding path program 1 times [2022-11-19 07:56:54,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:54,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484997272] [2022-11-19 07:56:54,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:54,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:57:01,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:01,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484997272] [2022-11-19 07:57:01,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484997272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:01,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:01,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-11-19 07:57:01,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832492544] [2022-11-19 07:57:01,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:01,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 07:57:01,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:01,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 07:57:01,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:57:01,744 INFO L87 Difference]: Start difference. First operand 20115 states and 28769 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:18,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:18,514 INFO L93 Difference]: Finished difference Result 23101 states and 32981 transitions. [2022-11-19 07:57:18,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-19 07:57:18,515 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-19 07:57:18,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:18,542 INFO L225 Difference]: With dead ends: 23101 [2022-11-19 07:57:18,542 INFO L226 Difference]: Without dead ends: 23099 [2022-11-19 07:57:18,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=879, Invalid=2781, Unknown=0, NotChecked=0, Total=3660 [2022-11-19 07:57:18,547 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 1257 mSDsluCounter, 2799 mSDsCounter, 0 mSdLazyCounter, 3825 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1257 SdHoareTripleChecker+Valid, 3131 SdHoareTripleChecker+Invalid, 3844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:18,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1257 Valid, 3131 Invalid, 3844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 3825 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-19 07:57:18,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23099 states. [2022-11-19 07:57:24,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23099 to 21957. [2022-11-19 07:57:24,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21957 states, 21956 states have (on average 1.4284933503370376) internal successors, (31364), 21956 states have internal predecessors, (31364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:24,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21957 states to 21957 states and 31364 transitions. [2022-11-19 07:57:24,632 INFO L78 Accepts]: Start accepts. Automaton has 21957 states and 31364 transitions. Word has length 76 [2022-11-19 07:57:24,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:24,633 INFO L495 AbstractCegarLoop]: Abstraction has 21957 states and 31364 transitions. [2022-11-19 07:57:24,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:24,633 INFO L276 IsEmpty]: Start isEmpty. Operand 21957 states and 31364 transitions. [2022-11-19 07:57:24,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 07:57:24,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:24,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:24,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-19 07:57:24,634 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:24,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:24,635 INFO L85 PathProgramCache]: Analyzing trace with hash 9508551, now seen corresponding path program 1 times [2022-11-19 07:57:24,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:24,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942659287] [2022-11-19 07:57:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:24,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:57:31,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:31,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942659287] [2022-11-19 07:57:31,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942659287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:31,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:31,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-11-19 07:57:31,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62388304] [2022-11-19 07:57:31,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:31,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-19 07:57:31,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:31,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-19 07:57:31,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 07:57:31,669 INFO L87 Difference]: Start difference. First operand 21957 states and 31364 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:52,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:52,241 INFO L93 Difference]: Finished difference Result 25005 states and 35642 transitions. [2022-11-19 07:57:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-19 07:57:52,241 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-19 07:57:52,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:52,275 INFO L225 Difference]: With dead ends: 25005 [2022-11-19 07:57:52,275 INFO L226 Difference]: Without dead ends: 25003 [2022-11-19 07:57:52,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1057, Invalid=3365, Unknown=0, NotChecked=0, Total=4422 [2022-11-19 07:57:52,281 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 1528 mSDsluCounter, 3686 mSDsCounter, 0 mSdLazyCounter, 5567 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1528 SdHoareTripleChecker+Valid, 4018 SdHoareTripleChecker+Invalid, 5592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 5567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:52,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1528 Valid, 4018 Invalid, 5592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 5567 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-11-19 07:57:52,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25003 states. [2022-11-19 07:57:58,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25003 to 21957. [2022-11-19 07:57:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21957 states, 21956 states have (on average 1.4284933503370376) internal successors, (31364), 21956 states have internal predecessors, (31364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21957 states to 21957 states and 31364 transitions. [2022-11-19 07:57:58,431 INFO L78 Accepts]: Start accepts. Automaton has 21957 states and 31364 transitions. Word has length 76 [2022-11-19 07:57:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:58,431 INFO L495 AbstractCegarLoop]: Abstraction has 21957 states and 31364 transitions. [2022-11-19 07:57:58,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:58,431 INFO L276 IsEmpty]: Start isEmpty. Operand 21957 states and 31364 transitions. [2022-11-19 07:57:58,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 07:57:58,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:58,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:58,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-19 07:57:58,432 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:58,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:58,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1369733799, now seen corresponding path program 1 times [2022-11-19 07:57:58,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:58,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600748775] [2022-11-19 07:57:58,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:58,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:58:04,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:04,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600748775] [2022-11-19 07:58:04,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600748775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:58:04,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:58:04,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-11-19 07:58:04,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519219185] [2022-11-19 07:58:04,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:58:04,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 07:58:04,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:04,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 07:58:04,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:58:04,235 INFO L87 Difference]: Start difference. First operand 21957 states and 31364 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:58:23,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:23,550 INFO L93 Difference]: Finished difference Result 25000 states and 35638 transitions. [2022-11-19 07:58:23,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-19 07:58:23,551 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-19 07:58:23,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:23,586 INFO L225 Difference]: With dead ends: 25000 [2022-11-19 07:58:23,586 INFO L226 Difference]: Without dead ends: 24998 [2022-11-19 07:58:23,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=771, Invalid=3011, Unknown=0, NotChecked=0, Total=3782 [2022-11-19 07:58:23,592 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 1323 mSDsluCounter, 2710 mSDsCounter, 0 mSdLazyCounter, 3958 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1323 SdHoareTripleChecker+Valid, 3031 SdHoareTripleChecker+Invalid, 3977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:23,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1323 Valid, 3031 Invalid, 3977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 3958 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-19 07:58:23,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24998 states. [2022-11-19 07:58:29,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24998 to 21957. [2022-11-19 07:58:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21957 states, 21956 states have (on average 1.4284933503370376) internal successors, (31364), 21956 states have internal predecessors, (31364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:58:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21957 states to 21957 states and 31364 transitions. [2022-11-19 07:58:29,859 INFO L78 Accepts]: Start accepts. Automaton has 21957 states and 31364 transitions. Word has length 76 [2022-11-19 07:58:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:29,859 INFO L495 AbstractCegarLoop]: Abstraction has 21957 states and 31364 transitions. [2022-11-19 07:58:29,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:58:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 21957 states and 31364 transitions. [2022-11-19 07:58:29,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-19 07:58:29,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:29,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:58:29,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-19 07:58:29,862 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:58:29,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:29,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1437329051, now seen corresponding path program 1 times [2022-11-19 07:58:29,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:29,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048942437] [2022-11-19 07:58:29,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:29,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:58:42,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:42,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048942437] [2022-11-19 07:58:42,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048942437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:58:42,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:58:42,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-11-19 07:58:42,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784245422] [2022-11-19 07:58:42,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:58:42,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-19 07:58:42,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:42,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-19 07:58:42,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1571, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 07:58:42,614 INFO L87 Difference]: Start difference. First operand 21957 states and 31364 transitions. Second operand has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:59:12,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:59:12,682 INFO L93 Difference]: Finished difference Result 24947 states and 35582 transitions. [2022-11-19 07:59:12,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-19 07:59:12,683 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-11-19 07:59:12,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:59:12,715 INFO L225 Difference]: With dead ends: 24947 [2022-11-19 07:59:12,716 INFO L226 Difference]: Without dead ends: 24945 [2022-11-19 07:59:12,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=1202, Invalid=4498, Unknown=0, NotChecked=0, Total=5700 [2022-11-19 07:59:12,721 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 1363 mSDsluCounter, 3253 mSDsCounter, 0 mSdLazyCounter, 6075 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1363 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 6089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 6075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:59:12,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1363 Valid, 3584 Invalid, 6089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 6075 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2022-11-19 07:59:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24945 states. [2022-11-19 07:59:18,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24945 to 21933. [2022-11-19 07:59:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21933 states, 21932 states have (on average 1.4288710559912456) internal successors, (31338), 21932 states have internal predecessors, (31338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:59:18,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21933 states to 21933 states and 31338 transitions. [2022-11-19 07:59:18,966 INFO L78 Accepts]: Start accepts. Automaton has 21933 states and 31338 transitions. Word has length 78 [2022-11-19 07:59:18,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:59:18,966 INFO L495 AbstractCegarLoop]: Abstraction has 21933 states and 31338 transitions. [2022-11-19 07:59:18,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:59:18,966 INFO L276 IsEmpty]: Start isEmpty. Operand 21933 states and 31338 transitions. [2022-11-19 07:59:18,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-19 07:59:18,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:59:18,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:59:18,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-19 07:59:18,969 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:59:18,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:59:18,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1503727214, now seen corresponding path program 1 times [2022-11-19 07:59:18,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:59:18,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233033371] [2022-11-19 07:59:18,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:18,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:59:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:59:19,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:59:19,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233033371] [2022-11-19 07:59:19,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233033371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:59:19,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:59:19,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:59:19,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326524179] [2022-11-19 07:59:19,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:59:19,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:59:19,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:59:19,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:59:19,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:59:19,049 INFO L87 Difference]: Start difference. First operand 21933 states and 31338 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:59:26,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:59:26,032 INFO L93 Difference]: Finished difference Result 33408 states and 48056 transitions. [2022-11-19 07:59:26,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:59:26,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2022-11-19 07:59:26,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:59:26,068 INFO L225 Difference]: With dead ends: 33408 [2022-11-19 07:59:26,068 INFO L226 Difference]: Without dead ends: 26286 [2022-11-19 07:59:26,074 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 [2022-11-19 07:59:26,075 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 98 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:59:26,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 416 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:59:26,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26286 states. [2022-11-19 07:59:32,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26286 to 25252. [2022-11-19 07:59:32,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25252 states, 25251 states have (on average 1.4280226525682151) internal successors, (36059), 25251 states have internal predecessors, (36059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:59:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25252 states to 25252 states and 36059 transitions. [2022-11-19 07:59:33,019 INFO L78 Accepts]: Start accepts. Automaton has 25252 states and 36059 transitions. Word has length 83 [2022-11-19 07:59:33,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:59:33,020 INFO L495 AbstractCegarLoop]: Abstraction has 25252 states and 36059 transitions. [2022-11-19 07:59:33,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:59:33,020 INFO L276 IsEmpty]: Start isEmpty. Operand 25252 states and 36059 transitions. [2022-11-19 07:59:33,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-19 07:59:33,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:59:33,022 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:59:33,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-19 07:59:33,022 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:59:33,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:59:33,023 INFO L85 PathProgramCache]: Analyzing trace with hash -2108725483, now seen corresponding path program 1 times [2022-11-19 07:59:33,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:59:33,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124801974] [2022-11-19 07:59:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:33,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:59:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:59:33,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:59:33,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124801974] [2022-11-19 07:59:33,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124801974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:59:33,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:59:33,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:59:33,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394843480] [2022-11-19 07:59:33,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:59:33,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:59:33,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:59:33,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:59:33,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:59:33,068 INFO L87 Difference]: Start difference. First operand 25252 states and 36059 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:59:44,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:59:44,903 INFO L93 Difference]: Finished difference Result 61794 states and 88311 transitions. [2022-11-19 07:59:44,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:59:44,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2022-11-19 07:59:44,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:59:44,955 INFO L225 Difference]: With dead ends: 61794 [2022-11-19 07:59:44,955 INFO L226 Difference]: Without dead ends: 38736 [2022-11-19 07:59:44,968 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 [2022-11-19 07:59:44,968 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 106 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:59:44,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 444 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:59:44,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38736 states. [2022-11-19 07:59:57,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38736 to 38734. [2022-11-19 07:59:57,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38734 states, 38733 states have (on average 1.4188676322515685) internal successors, (54957), 38733 states have internal predecessors, (54957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:59:57,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38734 states to 38734 states and 54957 transitions. [2022-11-19 07:59:57,416 INFO L78 Accepts]: Start accepts. Automaton has 38734 states and 54957 transitions. Word has length 86 [2022-11-19 07:59:57,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:59:57,417 INFO L495 AbstractCegarLoop]: Abstraction has 38734 states and 54957 transitions. [2022-11-19 07:59:57,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:59:57,417 INFO L276 IsEmpty]: Start isEmpty. Operand 38734 states and 54957 transitions. [2022-11-19 07:59:57,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-19 07:59:57,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:59:57,420 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:59:57,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-19 07:59:57,420 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:59:57,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:59:57,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1864404235, now seen corresponding path program 1 times [2022-11-19 07:59:57,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:59:57,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008214740] [2022-11-19 07:59:57,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:57,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:59:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:59:57,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:59:57,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008214740] [2022-11-19 07:59:57,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008214740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:59:57,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:59:57,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:59:57,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746720240] [2022-11-19 07:59:57,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:59:57,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:59:57,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:59:57,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:59:57,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:59:57,493 INFO L87 Difference]: Start difference. First operand 38734 states and 54957 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:14,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:14,563 INFO L93 Difference]: Finished difference Result 66385 states and 94877 transitions. [2022-11-19 08:00:14,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:00:14,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2022-11-19 08:00:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:14,655 INFO L225 Difference]: With dead ends: 66385 [2022-11-19 08:00:14,655 INFO L226 Difference]: Without dead ends: 49103 [2022-11-19 08:00:14,674 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 [2022-11-19 08:00:14,675 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 93 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:14,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 397 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:00:14,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49103 states.