./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/bin/utaipan-7li7fVZpFI --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 8ffc122c88e19fa60ea50d5017c7f06bb9f1769c7e82b2428d0bede2356237c3 --- 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-5e519f3 [2022-11-03 02:12:34,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:12:34,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:12:34,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:12:34,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:12:34,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:12:34,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:12:34,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:12:34,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:12:34,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:12:34,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:12:34,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:12:34,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:12:34,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:12:34,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:12:34,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:12:34,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:12:34,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:12:34,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:12:34,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:12:34,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:12:34,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:12:34,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:12:34,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:12:34,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:12:34,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:12:34,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:12:34,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:12:34,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:12:34,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:12:34,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:12:34,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:12:34,489 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:12:34,492 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:12:34,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:12:34,495 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:12:34,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:12:34,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:12:34,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:12:34,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:12:34,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:12:34,499 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:12:34,549 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:12:34,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:12:34,550 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:12:34,550 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:12:34,551 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:12:34,551 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:12:34,551 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:12:34,552 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:12:34,552 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:12:34,552 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:12:34,553 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:12:34,554 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:12:34,554 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:12:34,554 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:12:34,554 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:12:34,555 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:12:34,555 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:12:34,555 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:12:34,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:12:34,556 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:12:34,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:12:34,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:12:34,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:12:34,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:12:34,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:12:34,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:12:34,558 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:12:34,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:12:34,558 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:12:34,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:12:34,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:12:34,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:12:34,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:12:34,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:12:34,560 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:12:34,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:12:34,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:12:34,560 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:12:34,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:12:34,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:12:34,561 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:12:34,561 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_06710687-6fc4-41ab-903d-b6424ba96551/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ffc122c88e19fa60ea50d5017c7f06bb9f1769c7e82b2428d0bede2356237c3 [2022-11-03 02:12:34,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:12:34,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:12:34,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:12:34,986 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:12:34,987 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:12:34,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-03 02:12:35,062 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/bin/utaipan-7li7fVZpFI/data/dd4369f35/568aa66492364d029d4a6356239adc4d/FLAGc164b3514 [2022-11-03 02:12:35,723 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:12:35,723 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-03 02:12:35,736 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/bin/utaipan-7li7fVZpFI/data/dd4369f35/568aa66492364d029d4a6356239adc4d/FLAGc164b3514 [2022-11-03 02:12:36,002 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/bin/utaipan-7li7fVZpFI/data/dd4369f35/568aa66492364d029d4a6356239adc4d [2022-11-03 02:12:36,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:12:36,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:12:36,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:12:36,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:12:36,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:12:36,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:12:36" (1/1) ... [2022-11-03 02:12:36,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d413fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:36, skipping insertion in model container [2022-11-03 02:12:36,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:12:36" (1/1) ... [2022-11-03 02:12:36,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:12:36,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:12:36,471 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5807,5820] [2022-11-03 02:12:36,508 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:12:36,537 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:12:36,609 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5807,5820] [2022-11-03 02:12:36,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:12:36,661 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:12:36,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:36 WrapperNode [2022-11-03 02:12:36,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:12:36,664 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:12:36,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:12:36,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:12:36,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:36" (1/1) ... [2022-11-03 02:12:36,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:36" (1/1) ... [2022-11-03 02:12:36,754 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 414 [2022-11-03 02:12:36,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:12:36,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:12:36,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:12:36,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:12:36,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:36" (1/1) ... [2022-11-03 02:12:36,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:36" (1/1) ... [2022-11-03 02:12:36,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:36" (1/1) ... [2022-11-03 02:12:36,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:36" (1/1) ... [2022-11-03 02:12:36,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:36" (1/1) ... [2022-11-03 02:12:36,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:36" (1/1) ... [2022-11-03 02:12:36,816 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:36" (1/1) ... [2022-11-03 02:12:36,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:36" (1/1) ... [2022-11-03 02:12:36,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:12:36,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:12:36,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:12:36,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:12:36,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:36" (1/1) ... [2022-11-03 02:12:36,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:12:36,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:12:36,868 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:12:36,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:12:36,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:12:36,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:12:36,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:12:36,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:12:37,082 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:12:37,085 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:12:37,686 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:12:37,864 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:12:37,865 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:12:37,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:12:37 BoogieIcfgContainer [2022-11-03 02:12:37,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:12:37,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:12:37,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:12:37,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:12:37,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:12:36" (1/3) ... [2022-11-03 02:12:37,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1b8914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:12:37, skipping insertion in model container [2022-11-03 02:12:37,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:36" (2/3) ... [2022-11-03 02:12:37,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1b8914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:12:37, skipping insertion in model container [2022-11-03 02:12:37,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:12:37" (3/3) ... [2022-11-03 02:12:37,886 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-03 02:12:37,906 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:12:37,906 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:12:37,969 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:12:37,986 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;@21c586e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:12:37,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:12:37,991 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 72 states have (on average 1.7222222222222223) internal successors, (124), 73 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:37,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 02:12:38,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:38,000 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] [2022-11-03 02:12:38,001 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:38,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:38,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1248708535, now seen corresponding path program 1 times [2022-11-03 02:12:38,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:38,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752540823] [2022-11-03 02:12:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:38,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:38,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:38,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:38,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752540823] [2022-11-03 02:12:38,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752540823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:38,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:38,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:12:38,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114351477] [2022-11-03 02:12:38,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:38,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:12:38,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:38,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:12:38,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:12:38,532 INFO L87 Difference]: Start difference. First operand has 74 states, 72 states have (on average 1.7222222222222223) internal successors, (124), 73 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:38,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:38,703 INFO L93 Difference]: Finished difference Result 152 states and 236 transitions. [2022-11-03 02:12:38,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:12:38,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2022-11-03 02:12:38,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:38,724 INFO L225 Difference]: With dead ends: 152 [2022-11-03 02:12:38,724 INFO L226 Difference]: Without dead ends: 107 [2022-11-03 02:12:38,729 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 [2022-11-03 02:12:38,740 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 82 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:38,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 209 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:12:38,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-03 02:12:38,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2022-11-03 02:12:38,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.3365384615384615) internal successors, (139), 104 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:38,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 139 transitions. [2022-11-03 02:12:38,818 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 139 transitions. Word has length 48 [2022-11-03 02:12:38,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:38,821 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 139 transitions. [2022-11-03 02:12:38,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:38,824 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 139 transitions. [2022-11-03 02:12:38,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 02:12:38,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:38,830 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] [2022-11-03 02:12:38,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:12:38,830 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:38,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:38,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2036715381, now seen corresponding path program 1 times [2022-11-03 02:12:38,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:38,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132539331] [2022-11-03 02:12:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:38,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:39,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:39,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132539331] [2022-11-03 02:12:39,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132539331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:39,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:39,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:12:39,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478566781] [2022-11-03 02:12:39,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:39,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:12:39,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:39,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:12:39,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:12:39,101 INFO L87 Difference]: Start difference. First operand 105 states and 139 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:39,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:39,235 INFO L93 Difference]: Finished difference Result 241 states and 339 transitions. [2022-11-03 02:12:39,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:12:39,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-03 02:12:39,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:39,240 INFO L225 Difference]: With dead ends: 241 [2022-11-03 02:12:39,241 INFO L226 Difference]: Without dead ends: 169 [2022-11-03 02:12:39,241 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 [2022-11-03 02:12:39,245 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 49 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:39,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 169 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:12:39,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-03 02:12:39,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2022-11-03 02:12:39,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.3855421686746987) internal successors, (230), 166 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 230 transitions. [2022-11-03 02:12:39,305 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 230 transitions. Word has length 51 [2022-11-03 02:12:39,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:39,306 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 230 transitions. [2022-11-03 02:12:39,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 230 transitions. [2022-11-03 02:12:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:12:39,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:39,308 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] [2022-11-03 02:12:39,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:12:39,308 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:39,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:39,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1508454477, now seen corresponding path program 1 times [2022-11-03 02:12:39,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:39,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67118092] [2022-11-03 02:12:39,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:39,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:39,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:39,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67118092] [2022-11-03 02:12:39,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67118092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:39,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:39,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:12:39,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454399686] [2022-11-03 02:12:39,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:39,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:12:39,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:39,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:12:39,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:12:39,488 INFO L87 Difference]: Start difference. First operand 167 states and 230 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:39,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:39,587 INFO L93 Difference]: Finished difference Result 419 states and 600 transitions. [2022-11-03 02:12:39,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:12:39,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-03 02:12:39,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:39,596 INFO L225 Difference]: With dead ends: 419 [2022-11-03 02:12:39,596 INFO L226 Difference]: Without dead ends: 285 [2022-11-03 02:12:39,600 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 [2022-11-03 02:12:39,607 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 44 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:39,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 165 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:12:39,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-03 02:12:39,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 283. [2022-11-03 02:12:39,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.4113475177304964) internal successors, (398), 282 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:39,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 398 transitions. [2022-11-03 02:12:39,678 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 398 transitions. Word has length 54 [2022-11-03 02:12:39,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:39,680 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 398 transitions. [2022-11-03 02:12:39,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:39,681 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 398 transitions. [2022-11-03 02:12:39,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:12:39,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:39,688 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] [2022-11-03 02:12:39,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:12:39,689 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:39,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:39,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1561870265, now seen corresponding path program 1 times [2022-11-03 02:12:39,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:39,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518461626] [2022-11-03 02:12:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:39,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:39,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:39,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518461626] [2022-11-03 02:12:39,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518461626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:39,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:39,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:12:39,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919847063] [2022-11-03 02:12:39,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:39,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:12:39,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:39,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:12:39,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:12:39,832 INFO L87 Difference]: Start difference. First operand 283 states and 398 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:39,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:39,973 INFO L93 Difference]: Finished difference Result 751 states and 1080 transitions. [2022-11-03 02:12:39,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:12:39,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-03 02:12:39,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:39,977 INFO L225 Difference]: With dead ends: 751 [2022-11-03 02:12:39,977 INFO L226 Difference]: Without dead ends: 501 [2022-11-03 02:12:39,981 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 [2022-11-03 02:12:39,989 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 39 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:39,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 161 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:12:39,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-11-03 02:12:40,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 499. [2022-11-03 02:12:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 1.4176706827309238) internal successors, (706), 498 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 706 transitions. [2022-11-03 02:12:40,130 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 706 transitions. Word has length 57 [2022-11-03 02:12:40,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:40,131 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 706 transitions. [2022-11-03 02:12:40,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:40,131 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 706 transitions. [2022-11-03 02:12:40,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 02:12:40,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:40,134 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] [2022-11-03 02:12:40,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:12:40,134 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:40,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:40,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1448811497, now seen corresponding path program 1 times [2022-11-03 02:12:40,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:40,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253588569] [2022-11-03 02:12:40,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:40,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:40,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:40,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253588569] [2022-11-03 02:12:40,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253588569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:40,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:40,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:12:40,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879347126] [2022-11-03 02:12:40,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:40,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:12:40,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:40,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:12:40,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:12:40,275 INFO L87 Difference]: Start difference. First operand 499 states and 706 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:40,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:40,509 INFO L93 Difference]: Finished difference Result 1367 states and 1956 transitions. [2022-11-03 02:12:40,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:12:40,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2022-11-03 02:12:40,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:40,520 INFO L225 Difference]: With dead ends: 1367 [2022-11-03 02:12:40,520 INFO L226 Difference]: Without dead ends: 901 [2022-11-03 02:12:40,521 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 [2022-11-03 02:12:40,522 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 34 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:40,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 157 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:12:40,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-11-03 02:12:40,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 899. [2022-11-03 02:12:40,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 1.4097995545657016) internal successors, (1266), 898 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:40,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1266 transitions. [2022-11-03 02:12:40,719 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1266 transitions. Word has length 60 [2022-11-03 02:12:40,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:40,720 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 1266 transitions. [2022-11-03 02:12:40,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:40,720 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1266 transitions. [2022-11-03 02:12:40,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:12:40,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:40,729 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] [2022-11-03 02:12:40,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:12:40,730 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:40,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:40,730 INFO L85 PathProgramCache]: Analyzing trace with hash -2021688885, now seen corresponding path program 1 times [2022-11-03 02:12:40,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:40,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938373552] [2022-11-03 02:12:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:40,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:40,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:40,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:40,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938373552] [2022-11-03 02:12:40,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938373552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:40,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:40,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:12:40,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432333063] [2022-11-03 02:12:40,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:40,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:12:40,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:40,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:12:40,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:12:40,925 INFO L87 Difference]: Start difference. First operand 899 states and 1266 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:41,879 INFO L93 Difference]: Finished difference Result 3691 states and 5249 transitions. [2022-11-03 02:12:41,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:12:41,880 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:12:41,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:41,893 INFO L225 Difference]: With dead ends: 3691 [2022-11-03 02:12:41,893 INFO L226 Difference]: Without dead ends: 2825 [2022-11-03 02:12:41,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:12:41,897 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 551 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:41,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 1295 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:12:41,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2825 states. [2022-11-03 02:12:42,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2825 to 1247. [2022-11-03 02:12:42,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 1.397271268057785) internal successors, (1741), 1246 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:42,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1741 transitions. [2022-11-03 02:12:42,238 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1741 transitions. Word has length 63 [2022-11-03 02:12:42,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:42,240 INFO L495 AbstractCegarLoop]: Abstraction has 1247 states and 1741 transitions. [2022-11-03 02:12:42,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:42,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1741 transitions. [2022-11-03 02:12:42,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 02:12:42,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:42,241 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] [2022-11-03 02:12:42,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:12:42,241 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:42,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:42,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1862495607, now seen corresponding path program 1 times [2022-11-03 02:12:42,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:42,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810391760] [2022-11-03 02:12:42,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:42,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:42,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:42,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810391760] [2022-11-03 02:12:42,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810391760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:42,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:42,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:12:42,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083951762] [2022-11-03 02:12:42,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:42,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:12:42,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:42,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:12:42,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:12:42,443 INFO L87 Difference]: Start difference. First operand 1247 states and 1741 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:43,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:43,012 INFO L93 Difference]: Finished difference Result 3181 states and 4487 transitions. [2022-11-03 02:12:43,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:12:43,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-03 02:12:43,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:43,020 INFO L225 Difference]: With dead ends: 3181 [2022-11-03 02:12:43,021 INFO L226 Difference]: Without dead ends: 1967 [2022-11-03 02:12:43,023 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 [2022-11-03 02:12:43,024 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 28 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:43,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 132 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:12:43,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2022-11-03 02:12:43,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1965. [2022-11-03 02:12:43,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 1.4058044806517311) internal successors, (2761), 1964 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:43,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2761 transitions. [2022-11-03 02:12:43,442 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2761 transitions. Word has length 65 [2022-11-03 02:12:43,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:43,442 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 2761 transitions. [2022-11-03 02:12:43,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:43,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2761 transitions. [2022-11-03 02:12:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 02:12:43,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:43,444 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] [2022-11-03 02:12:43,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:12:43,444 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:43,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:43,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1876348422, now seen corresponding path program 1 times [2022-11-03 02:12:43,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:43,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607698531] [2022-11-03 02:12:43,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:43,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:43,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:43,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607698531] [2022-11-03 02:12:43,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607698531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:43,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:43,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:12:43,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795907473] [2022-11-03 02:12:43,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:43,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:12:43,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:43,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:12:43,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:12:43,846 INFO L87 Difference]: Start difference. First operand 1965 states and 2761 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:44,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:44,546 INFO L93 Difference]: Finished difference Result 3897 states and 5488 transitions. [2022-11-03 02:12:44,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:12:44,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-03 02:12:44,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:44,557 INFO L225 Difference]: With dead ends: 3897 [2022-11-03 02:12:44,557 INFO L226 Difference]: Without dead ends: 1967 [2022-11-03 02:12:44,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:12:44,561 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 302 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:44,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 295 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:12:44,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2022-11-03 02:12:44,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1965. [2022-11-03 02:12:44,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 1.404786150712831) internal successors, (2759), 1964 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2759 transitions. [2022-11-03 02:12:44,956 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2759 transitions. Word has length 65 [2022-11-03 02:12:44,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:44,957 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 2759 transitions. [2022-11-03 02:12:44,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:44,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2759 transitions. [2022-11-03 02:12:44,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 02:12:44,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:44,958 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] [2022-11-03 02:12:44,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:12:44,958 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:44,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:44,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1957500574, now seen corresponding path program 1 times [2022-11-03 02:12:44,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:44,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630435951] [2022-11-03 02:12:44,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:44,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:45,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:45,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630435951] [2022-11-03 02:12:45,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630435951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:45,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:45,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:12:45,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56203308] [2022-11-03 02:12:45,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:45,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:12:45,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:45,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:12:45,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:12:45,062 INFO L87 Difference]: Start difference. First operand 1965 states and 2759 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:45,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:45,576 INFO L93 Difference]: Finished difference Result 3895 states and 5483 transitions. [2022-11-03 02:12:45,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:12:45,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-03 02:12:45,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:45,584 INFO L225 Difference]: With dead ends: 3895 [2022-11-03 02:12:45,584 INFO L226 Difference]: Without dead ends: 1965 [2022-11-03 02:12:45,587 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 [2022-11-03 02:12:45,590 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 197 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:45,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 71 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:12:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2022-11-03 02:12:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1965. [2022-11-03 02:12:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 1.3884928716904277) internal successors, (2727), 1964 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:46,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2727 transitions. [2022-11-03 02:12:46,126 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2727 transitions. Word has length 66 [2022-11-03 02:12:46,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:46,127 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 2727 transitions. [2022-11-03 02:12:46,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:46,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2727 transitions. [2022-11-03 02:12:46,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 02:12:46,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:46,128 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] [2022-11-03 02:12:46,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:12:46,129 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:46,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:46,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1829415267, now seen corresponding path program 1 times [2022-11-03 02:12:46,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:46,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23225022] [2022-11-03 02:12:46,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:46,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:46,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:46,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23225022] [2022-11-03 02:12:46,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23225022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:46,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:46,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:12:46,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980217574] [2022-11-03 02:12:46,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:46,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:12:46,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:46,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:12:46,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:12:46,229 INFO L87 Difference]: Start difference. First operand 1965 states and 2727 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:46,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:46,604 INFO L93 Difference]: Finished difference Result 3895 states and 5419 transitions. [2022-11-03 02:12:46,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:12:46,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-03 02:12:46,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:46,612 INFO L225 Difference]: With dead ends: 3895 [2022-11-03 02:12:46,612 INFO L226 Difference]: Without dead ends: 1965 [2022-11-03 02:12:46,615 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 [2022-11-03 02:12:46,616 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 168 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:46,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 87 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:12:46,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2022-11-03 02:12:46,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1965. [2022-11-03 02:12:46,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 1.375254582484725) internal successors, (2701), 1964 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:46,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2701 transitions. [2022-11-03 02:12:46,944 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2701 transitions. Word has length 66 [2022-11-03 02:12:46,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:46,944 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 2701 transitions. [2022-11-03 02:12:46,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2701 transitions. [2022-11-03 02:12:46,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 02:12:46,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:46,946 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] [2022-11-03 02:12:46,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:12:46,946 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:46,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:46,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1936261528, now seen corresponding path program 1 times [2022-11-03 02:12:46,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:46,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115487065] [2022-11-03 02:12:46,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:46,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:47,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:47,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115487065] [2022-11-03 02:12:47,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115487065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:47,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:47,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:12:47,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457007723] [2022-11-03 02:12:47,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:47,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:12:47,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:47,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:12:47,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:12:47,064 INFO L87 Difference]: Start difference. First operand 1965 states and 2701 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:47,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:47,514 INFO L93 Difference]: Finished difference Result 3895 states and 5367 transitions. [2022-11-03 02:12:47,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:12:47,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-03 02:12:47,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:47,521 INFO L225 Difference]: With dead ends: 3895 [2022-11-03 02:12:47,522 INFO L226 Difference]: Without dead ends: 1965 [2022-11-03 02:12:47,524 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 [2022-11-03 02:12:47,525 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 204 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:47,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 63 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:12:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2022-11-03 02:12:48,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1965. [2022-11-03 02:12:48,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 1.354887983706721) internal successors, (2661), 1964 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:48,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2661 transitions. [2022-11-03 02:12:48,025 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2661 transitions. Word has length 66 [2022-11-03 02:12:48,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:48,025 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 2661 transitions. [2022-11-03 02:12:48,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:48,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2661 transitions. [2022-11-03 02:12:48,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 02:12:48,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:48,026 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] [2022-11-03 02:12:48,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:12:48,027 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:48,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:48,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1173397821, now seen corresponding path program 1 times [2022-11-03 02:12:48,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:48,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844114528] [2022-11-03 02:12:48,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:48,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:48,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:48,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844114528] [2022-11-03 02:12:48,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844114528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:48,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:48,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:12:48,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267432446] [2022-11-03 02:12:48,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:48,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:12:48,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:48,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:12:48,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:12:48,309 INFO L87 Difference]: Start difference. First operand 1965 states and 2661 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:49,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:49,071 INFO L93 Difference]: Finished difference Result 2628 states and 3519 transitions. [2022-11-03 02:12:49,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:12:49,072 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-03 02:12:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:49,080 INFO L225 Difference]: With dead ends: 2628 [2022-11-03 02:12:49,080 INFO L226 Difference]: Without dead ends: 2626 [2022-11-03 02:12:49,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:12:49,083 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 126 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:49,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 512 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:12:49,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2022-11-03 02:12:49,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1965. [2022-11-03 02:12:49,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 1.3467413441955194) internal successors, (2645), 1964 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:49,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2645 transitions. [2022-11-03 02:12:49,593 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2645 transitions. Word has length 66 [2022-11-03 02:12:49,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:49,594 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 2645 transitions. [2022-11-03 02:12:49,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:49,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2645 transitions. [2022-11-03 02:12:49,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 02:12:49,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:49,596 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:12:49,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:12:49,596 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:49,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:49,597 INFO L85 PathProgramCache]: Analyzing trace with hash -97171403, now seen corresponding path program 1 times [2022-11-03 02:12:49,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:49,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154906017] [2022-11-03 02:12:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:49,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:59,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:59,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154906017] [2022-11-03 02:12:59,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154906017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:12:59,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923925009] [2022-11-03 02:12:59,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:59,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:12:59,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:12:59,402 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:12:59,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06710687-6fc4-41ab-903d-b6424ba96551/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:12:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:59,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 02:12:59,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:15,448 INFO L328 TraceCheckSpWp]: Computing backward predicates...