./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f63f8f7-1872-4344-b39c-9e4b0bf059e4/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f63f8f7-1872-4344-b39c-9e4b0bf059e4/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f63f8f7-1872-4344-b39c-9e4b0bf059e4/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f63f8f7-1872-4344-b39c-9e4b0bf059e4/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f63f8f7-1872-4344-b39c-9e4b0bf059e4/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f63f8f7-1872-4344-b39c-9e4b0bf059e4/bin/utaipan-vmNK8stdcF --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 f299e5c87ef8b927f907740b52cd3b6a05ddc6197a3b61da31c7c3837813d6c6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:21:18,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:21:18,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:21:18,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:21:18,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:21:18,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:21:18,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:21:18,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:21:18,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:21:18,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:21:18,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:21:18,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:21:18,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:21:18,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:21:18,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:21:18,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:21:18,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:21:18,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:21:18,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:21:18,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:21:18,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:21:18,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:21:18,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:21:18,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:21:18,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:21:18,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:21:18,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:21:18,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:21:18,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:21:18,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:21:18,469 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:21:18,470 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:21:18,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:21:18,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:21:18,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:21:18,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:21:18,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:21:18,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:21:18,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:21:18,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:21:18,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:21:18,479 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f63f8f7-1872-4344-b39c-9e4b0bf059e4/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:21:18,531 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:21:18,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:21:18,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:21:18,534 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:21:18,534 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:21:18,534 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:21:18,534 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:21:18,534 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:21:18,541 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:21:18,541 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:21:18,542 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:21:18,543 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:21:18,543 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:21:18,543 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:21:18,544 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:21:18,544 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:21:18,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:21:18,546 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:21:18,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:21:18,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:21:18,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:21:18,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:21:18,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:21:18,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:21:18,548 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:21:18,548 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:21:18,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:21:18,548 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:21:18,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:21:18,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:21:18,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:21:18,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:21:18,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:21:18,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:21:18,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:21:18,552 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:21:18,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:21:18,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:21:18,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:21:18,553 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:21:18,553 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f63f8f7-1872-4344-b39c-9e4b0bf059e4/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f63f8f7-1872-4344-b39c-9e4b0bf059e4/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f299e5c87ef8b927f907740b52cd3b6a05ddc6197a3b61da31c7c3837813d6c6 [2021-11-12 22:21:18,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:21:18,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:21:18,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:21:18,863 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:21:18,864 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:21:18,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f63f8f7-1872-4344-b39c-9e4b0bf059e4/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 22:21:18,960 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f63f8f7-1872-4344-b39c-9e4b0bf059e4/bin/utaipan-vmNK8stdcF/data/e4b567e73/a8cfe32d447d4e63b18206753ce0a386/FLAG6493198e0 [2021-11-12 22:21:19,474 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:21:19,475 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f63f8f7-1872-4344-b39c-9e4b0bf059e4/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 22:21:19,488 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f63f8f7-1872-4344-b39c-9e4b0bf059e4/bin/utaipan-vmNK8stdcF/data/e4b567e73/a8cfe32d447d4e63b18206753ce0a386/FLAG6493198e0 [2021-11-12 22:21:19,767 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f63f8f7-1872-4344-b39c-9e4b0bf059e4/bin/utaipan-vmNK8stdcF/data/e4b567e73/a8cfe32d447d4e63b18206753ce0a386 [2021-11-12 22:21:19,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:21:19,771 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:21:19,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:21:19,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:21:19,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:21:19,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:21:19" (1/1) ... [2021-11-12 22:21:19,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61ac6543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:19, skipping insertion in model container [2021-11-12 22:21:19,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:21:19" (1/1) ... [2021-11-12 22:21:19,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:21:19,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:21:20,237 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f63f8f7-1872-4344-b39c-9e4b0bf059e4/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9868,9881] [2021-11-12 22:21:20,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:21:20,393 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:21:20,469 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f63f8f7-1872-4344-b39c-9e4b0bf059e4/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9868,9881] [2021-11-12 22:21:20,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:21:20,555 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:21:20,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:20 WrapperNode [2021-11-12 22:21:20,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:21:20,557 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:21:20,557 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:21:20,557 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:21:20,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:20" (1/1) ... [2021-11-12 22:21:20,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:20" (1/1) ... [2021-11-12 22:21:20,636 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:21:20,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:21:20,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:21:20,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:21:20,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:20" (1/1) ... [2021-11-12 22:21:20,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:20" (1/1) ... [2021-11-12 22:21:20,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:20" (1/1) ... [2021-11-12 22:21:20,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:20" (1/1) ... [2021-11-12 22:21:20,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:20" (1/1) ... [2021-11-12 22:21:20,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:20" (1/1) ... [2021-11-12 22:21:20,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:20" (1/1) ... [2021-11-12 22:21:20,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:21:20,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:21:20,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:21:20,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:21:20,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:20" (1/1) ... [2021-11-12 22:21:20,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:21:20,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f63f8f7-1872-4344-b39c-9e4b0bf059e4/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:21:20,752 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f63f8f7-1872-4344-b39c-9e4b0bf059e4/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:21:20,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f63f8f7-1872-4344-b39c-9e4b0bf059e4/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:21:20,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:21:20,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:21:20,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:21:20,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:21:21,886 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:21:21,887 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 22:21:21,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:21:21 BoogieIcfgContainer [2021-11-12 22:21:21,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:21:21,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:21:21,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:21:21,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:21:21,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:21:19" (1/3) ... [2021-11-12 22:21:21,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736fb457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:21:21, skipping insertion in model container [2021-11-12 22:21:21,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:20" (2/3) ... [2021-11-12 22:21:21,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736fb457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:21:21, skipping insertion in model container [2021-11-12 22:21:21,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:21:21" (3/3) ... [2021-11-12 22:21:21,905 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 22:21:21,911 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:21:21,911 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:21:21,961 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:21:21,968 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:21:21,968 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:21:21,987 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 184 states have (on average 1.7119565217391304) internal successors, (315), 185 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:21,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-12 22:21:21,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:21,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:21,999 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:22,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:22,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1437980373, now seen corresponding path program 1 times [2021-11-12 22:21:22,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:21:22,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076633334] [2021-11-12 22:21:22,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:22,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:21:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:22,728 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:21:22,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076633334] [2021-11-12 22:21:22,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076633334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:22,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:22,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-12 22:21:22,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245505151] [2021-11-12 22:21:22,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:22,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:21:22,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:21:22,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:21:22,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:21:22,782 INFO L87 Difference]: Start difference. First operand has 186 states, 184 states have (on average 1.7119565217391304) internal successors, (315), 185 states have internal predecessors, (315), 0 states have call successors, (0), 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 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:23,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:23,314 INFO L93 Difference]: Finished difference Result 736 states and 1182 transitions. [2021-11-12 22:21:23,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:21:23,318 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-11-12 22:21:23,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:23,339 INFO L225 Difference]: With dead ends: 736 [2021-11-12 22:21:23,339 INFO L226 Difference]: Without dead ends: 630 [2021-11-12 22:21:23,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:21:23,345 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 1130 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 293.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.83ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 351.20ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:23,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1130 Valid, 1450 Invalid, 256 Unknown, 0 Unchecked, 21.83ms Time], IncrementalHoareTripleChecker [48 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 351.20ms Time] [2021-11-12 22:21:23,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-12 22:21:23,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 620. [2021-11-12 22:21:23,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 1.4168012924071083) internal successors, (877), 619 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 877 transitions. [2021-11-12 22:21:23,484 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 877 transitions. Word has length 80 [2021-11-12 22:21:23,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:23,485 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 877 transitions. [2021-11-12 22:21:23,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:23,486 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 877 transitions. [2021-11-12 22:21:23,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 22:21:23,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:23,499 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:23,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:21:23,500 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:23,501 INFO L85 PathProgramCache]: Analyzing trace with hash 481584325, now seen corresponding path program 1 times [2021-11-12 22:21:23,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:21:23,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127748064] [2021-11-12 22:21:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:23,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:21:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:23,673 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:21:23,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127748064] [2021-11-12 22:21:23,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127748064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:23,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:23,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:21:23,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598969707] [2021-11-12 22:21:23,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:23,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:21:23,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:21:23,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:21:23,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:21:23,677 INFO L87 Difference]: Start difference. First operand 620 states and 877 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:24,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:24,007 INFO L93 Difference]: Finished difference Result 1516 states and 2204 transitions. [2021-11-12 22:21:24,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:21:24,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-12 22:21:24,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:24,015 INFO L225 Difference]: With dead ends: 1516 [2021-11-12 22:21:24,015 INFO L226 Difference]: Without dead ends: 981 [2021-11-12 22:21:24,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:24,027 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 646 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 172.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.22ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 217.62ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:24,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 264 Invalid, 239 Unknown, 0 Unchecked, 4.22ms Time], IncrementalHoareTripleChecker [6 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 217.62ms Time] [2021-11-12 22:21:24,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-11-12 22:21:24,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 979. [2021-11-12 22:21:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 1.4488752556237219) internal successors, (1417), 978 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:24,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1417 transitions. [2021-11-12 22:21:24,139 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1417 transitions. Word has length 81 [2021-11-12 22:21:24,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:24,141 INFO L470 AbstractCegarLoop]: Abstraction has 979 states and 1417 transitions. [2021-11-12 22:21:24,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:24,143 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1417 transitions. [2021-11-12 22:21:24,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 22:21:24,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:24,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:24,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 22:21:24,148 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:24,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:24,150 INFO L85 PathProgramCache]: Analyzing trace with hash 498152103, now seen corresponding path program 1 times [2021-11-12 22:21:24,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:21:24,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451281170] [2021-11-12 22:21:24,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:24,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:21:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:24,383 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:21:24,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451281170] [2021-11-12 22:21:24,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451281170] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:24,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:24,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:21:24,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295510758] [2021-11-12 22:21:24,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:24,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:21:24,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:21:24,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:21:24,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:21:24,386 INFO L87 Difference]: Start difference. First operand 979 states and 1417 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:24,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:24,810 INFO L93 Difference]: Finished difference Result 2526 states and 3736 transitions. [2021-11-12 22:21:24,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:21:24,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-12 22:21:24,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:24,823 INFO L225 Difference]: With dead ends: 2526 [2021-11-12 22:21:24,823 INFO L226 Difference]: Without dead ends: 1699 [2021-11-12 22:21:24,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:24,832 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 618 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 176.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.06ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 227.06ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:24,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 280 Invalid, 235 Unknown, 0 Unchecked, 4.06ms Time], IncrementalHoareTripleChecker [6 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 227.06ms Time] [2021-11-12 22:21:24,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-11-12 22:21:25,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1697. [2021-11-12 22:21:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 1.4705188679245282) internal successors, (2494), 1696 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:25,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 2494 transitions. [2021-11-12 22:21:25,025 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 2494 transitions. Word has length 81 [2021-11-12 22:21:25,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:25,025 INFO L470 AbstractCegarLoop]: Abstraction has 1697 states and 2494 transitions. [2021-11-12 22:21:25,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:25,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 2494 transitions. [2021-11-12 22:21:25,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 22:21:25,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:25,029 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:25,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 22:21:25,030 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:25,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:25,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2079631928, now seen corresponding path program 1 times [2021-11-12 22:21:25,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:21:25,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105012497] [2021-11-12 22:21:25,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:25,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:21:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:25,149 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:21:25,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105012497] [2021-11-12 22:21:25,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105012497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:25,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:25,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:21:25,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106677760] [2021-11-12 22:21:25,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:25,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:21:25,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:21:25,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:21:25,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:21:25,154 INFO L87 Difference]: Start difference. First operand 1697 states and 2494 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:25,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:25,701 INFO L93 Difference]: Finished difference Result 4639 states and 6922 transitions. [2021-11-12 22:21:25,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:21:25,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-12 22:21:25,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:25,723 INFO L225 Difference]: With dead ends: 4639 [2021-11-12 22:21:25,725 INFO L226 Difference]: Without dead ends: 3135 [2021-11-12 22:21:25,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:25,735 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 636 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 159.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.91ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 196.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:25,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 281 Invalid, 221 Unknown, 0 Unchecked, 3.91ms Time], IncrementalHoareTripleChecker [6 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 196.07ms Time] [2021-11-12 22:21:25,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2021-11-12 22:21:26,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 3133. [2021-11-12 22:21:26,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3133 states, 3132 states have (on average 1.4827586206896552) internal successors, (4644), 3132 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:26,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3133 states to 3133 states and 4644 transitions. [2021-11-12 22:21:26,049 INFO L78 Accepts]: Start accepts. Automaton has 3133 states and 4644 transitions. Word has length 81 [2021-11-12 22:21:26,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:26,049 INFO L470 AbstractCegarLoop]: Abstraction has 3133 states and 4644 transitions. [2021-11-12 22:21:26,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:26,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3133 states and 4644 transitions. [2021-11-12 22:21:26,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 22:21:26,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:26,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:26,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 22:21:26,052 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:26,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:26,053 INFO L85 PathProgramCache]: Analyzing trace with hash -786239274, now seen corresponding path program 1 times [2021-11-12 22:21:26,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:21:26,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773652466] [2021-11-12 22:21:26,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:26,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:21:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:26,199 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:21:26,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773652466] [2021-11-12 22:21:26,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773652466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:26,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:26,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:21:26,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089987782] [2021-11-12 22:21:26,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:26,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:21:26,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:21:26,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:21:26,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:21:26,202 INFO L87 Difference]: Start difference. First operand 3133 states and 4644 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:26,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:26,959 INFO L93 Difference]: Finished difference Result 9025 states and 13482 transitions. [2021-11-12 22:21:26,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:21:26,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-12 22:21:26,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:26,998 INFO L225 Difference]: With dead ends: 9025 [2021-11-12 22:21:26,998 INFO L226 Difference]: Without dead ends: 6007 [2021-11-12 22:21:27,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:27,006 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 617 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 155.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.81ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 191.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:27,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 272 Invalid, 232 Unknown, 0 Unchecked, 3.81ms Time], IncrementalHoareTripleChecker [6 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 191.12ms Time] [2021-11-12 22:21:27,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6007 states. [2021-11-12 22:21:27,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6007 to 6005. [2021-11-12 22:21:27,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6005 states, 6004 states have (on average 1.4841772151898733) internal successors, (8911), 6004 states have internal predecessors, (8911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:27,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6005 states to 6005 states and 8911 transitions. [2021-11-12 22:21:27,574 INFO L78 Accepts]: Start accepts. Automaton has 6005 states and 8911 transitions. Word has length 81 [2021-11-12 22:21:27,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:27,593 INFO L470 AbstractCegarLoop]: Abstraction has 6005 states and 8911 transitions. [2021-11-12 22:21:27,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:27,594 INFO L276 IsEmpty]: Start isEmpty. Operand 6005 states and 8911 transitions. [2021-11-12 22:21:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 22:21:27,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:27,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:27,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 22:21:27,596 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:27,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:27,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1625296500, now seen corresponding path program 1 times [2021-11-12 22:21:27,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:21:27,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960211878] [2021-11-12 22:21:27,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:27,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:21:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:27,663 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:21:27,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960211878] [2021-11-12 22:21:27,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960211878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:27,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:27,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:21:27,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214285842] [2021-11-12 22:21:27,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:27,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:21:27,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:21:27,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:21:27,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:21:27,665 INFO L87 Difference]: Start difference. First operand 6005 states and 8911 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:28,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:28,934 INFO L93 Difference]: Finished difference Result 17694 states and 26360 transitions. [2021-11-12 22:21:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:21:28,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-12 22:21:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:29,008 INFO L225 Difference]: With dead ends: 17694 [2021-11-12 22:21:29,009 INFO L226 Difference]: Without dead ends: 11751 [2021-11-12 22:21:29,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:29,020 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 633 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 179.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.90ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 219.83ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:29,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 256 Invalid, 232 Unknown, 0 Unchecked, 3.90ms Time], IncrementalHoareTripleChecker [6 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 219.83ms Time] [2021-11-12 22:21:29,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11751 states. [2021-11-12 22:21:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11751 to 11749. [2021-11-12 22:21:30,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11749 states, 11748 states have (on average 1.477357848144365) internal successors, (17356), 11748 states have internal predecessors, (17356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:30,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11749 states to 11749 states and 17356 transitions. [2021-11-12 22:21:30,142 INFO L78 Accepts]: Start accepts. Automaton has 11749 states and 17356 transitions. Word has length 81 [2021-11-12 22:21:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:30,142 INFO L470 AbstractCegarLoop]: Abstraction has 11749 states and 17356 transitions. [2021-11-12 22:21:30,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:30,143 INFO L276 IsEmpty]: Start isEmpty. Operand 11749 states and 17356 transitions. [2021-11-12 22:21:30,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-12 22:21:30,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:30,144 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:30,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 22:21:30,145 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:30,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:30,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1266366863, now seen corresponding path program 1 times [2021-11-12 22:21:30,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:21:30,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137414184] [2021-11-12 22:21:30,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:30,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:21:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:30,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:21:30,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137414184] [2021-11-12 22:21:30,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137414184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:30,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:30,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:21:30,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605771040] [2021-11-12 22:21:30,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:30,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:21:30,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:21:30,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:21:30,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:21:30,226 INFO L87 Difference]: Start difference. First operand 11749 states and 17356 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:31,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:31,512 INFO L93 Difference]: Finished difference Result 23420 states and 34624 transitions. [2021-11-12 22:21:31,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:21:31,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-12 22:21:31,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:31,550 INFO L225 Difference]: With dead ends: 23420 [2021-11-12 22:21:31,551 INFO L226 Difference]: Without dead ends: 11749 [2021-11-12 22:21:31,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:31,567 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 527 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.77ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 133.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:31,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 199 Invalid, 165 Unknown, 0 Unchecked, 2.77ms Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 133.58ms Time] [2021-11-12 22:21:31,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11749 states. [2021-11-12 22:21:32,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11749 to 11749. [2021-11-12 22:21:32,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11749 states, 11748 states have (on average 1.4772727272727273) internal successors, (17355), 11748 states have internal predecessors, (17355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11749 states to 11749 states and 17355 transitions. [2021-11-12 22:21:32,341 INFO L78 Accepts]: Start accepts. Automaton has 11749 states and 17355 transitions. Word has length 82 [2021-11-12 22:21:32,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:32,342 INFO L470 AbstractCegarLoop]: Abstraction has 11749 states and 17355 transitions. [2021-11-12 22:21:32,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 11749 states and 17355 transitions. [2021-11-12 22:21:32,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-12 22:21:32,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:32,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:32,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 22:21:32,344 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:32,345 INFO L85 PathProgramCache]: Analyzing trace with hash -147514495, now seen corresponding path program 1 times [2021-11-12 22:21:32,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:21:32,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285991028] [2021-11-12 22:21:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:32,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:21:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:33,416 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:21:33,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285991028] [2021-11-12 22:21:33,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285991028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:33,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:33,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-12 22:21:33,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775485375] [2021-11-12 22:21:33,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:33,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:21:33,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:21:33,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:21:33,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:21:33,418 INFO L87 Difference]: Start difference. First operand 11749 states and 17355 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:37,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:37,068 INFO L93 Difference]: Finished difference Result 25246 states and 37108 transitions. [2021-11-12 22:21:37,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:21:37,069 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-12 22:21:37,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:37,136 INFO L225 Difference]: With dead ends: 25246 [2021-11-12 22:21:37,136 INFO L226 Difference]: Without dead ends: 25244 [2021-11-12 22:21:37,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:21:37,144 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 1214 mSDsluCounter, 2632 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1011.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 2905 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.76ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1171.84ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:37,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1214 Valid, 2905 Invalid, 1247 Unknown, 0 Unchecked, 22.76ms Time], IncrementalHoareTripleChecker [28 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 1171.84ms Time] [2021-11-12 22:21:37,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25244 states. [2021-11-12 22:21:38,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25244 to 18931. [2021-11-12 22:21:38,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18931 states, 18930 states have (on average 1.4703116745905969) internal successors, (27833), 18930 states have internal predecessors, (27833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:38,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18931 states to 18931 states and 27833 transitions. [2021-11-12 22:21:38,688 INFO L78 Accepts]: Start accepts. Automaton has 18931 states and 27833 transitions. Word has length 82 [2021-11-12 22:21:38,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:38,688 INFO L470 AbstractCegarLoop]: Abstraction has 18931 states and 27833 transitions. [2021-11-12 22:21:38,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:38,689 INFO L276 IsEmpty]: Start isEmpty. Operand 18931 states and 27833 transitions. [2021-11-12 22:21:38,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-12 22:21:38,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:38,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:38,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 22:21:38,692 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:38,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:38,692 INFO L85 PathProgramCache]: Analyzing trace with hash -874101823, now seen corresponding path program 1 times [2021-11-12 22:21:38,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:21:38,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964094930] [2021-11-12 22:21:38,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:38,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:21:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:40,069 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:21:40,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964094930] [2021-11-12 22:21:40,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964094930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:40,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:40,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-12 22:21:40,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195466654] [2021-11-12 22:21:40,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:40,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-12 22:21:40,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:21:40,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-12 22:21:40,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:21:40,071 INFO L87 Difference]: Start difference. First operand 18931 states and 27833 transitions. Second operand has 25 states, 25 states have (on average 3.28) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:44,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:44,729 INFO L93 Difference]: Finished difference Result 27317 states and 40021 transitions. [2021-11-12 22:21:44,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 22:21:44,729 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-12 22:21:44,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:44,803 INFO L225 Difference]: With dead ends: 27317 [2021-11-12 22:21:44,803 INFO L226 Difference]: Without dead ends: 25107 [2021-11-12 22:21:44,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=324, Invalid=1398, Unknown=0, NotChecked=0, Total=1722 [2021-11-12 22:21:44,818 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 1633 mSDsluCounter, 2443 mSDsCounter, 0 mSdLazyCounter, 3201 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1737.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1633 SdHoareTripleChecker+Valid, 2686 SdHoareTripleChecker+Invalid, 3227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.97ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2165.38ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:44,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1633 Valid, 2686 Invalid, 3227 Unknown, 0 Unchecked, 15.97ms Time], IncrementalHoareTripleChecker [26 Valid, 3201 Invalid, 0 Unknown, 0 Unchecked, 2165.38ms Time] [2021-11-12 22:21:44,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25107 states. [2021-11-12 22:21:46,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25107 to 18959. [2021-11-12 22:21:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18959 states, 18958 states have (on average 1.4699862854731511) internal successors, (27868), 18958 states have internal predecessors, (27868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18959 states to 18959 states and 27868 transitions. [2021-11-12 22:21:46,519 INFO L78 Accepts]: Start accepts. Automaton has 18959 states and 27868 transitions. Word has length 82 [2021-11-12 22:21:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:46,519 INFO L470 AbstractCegarLoop]: Abstraction has 18959 states and 27868 transitions. [2021-11-12 22:21:46,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:46,520 INFO L276 IsEmpty]: Start isEmpty. Operand 18959 states and 27868 transitions. [2021-11-12 22:21:46,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-12 22:21:46,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:46,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:46,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 22:21:46,522 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:46,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:46,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1337027553, now seen corresponding path program 1 times [2021-11-12 22:21:46,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:21:46,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554556848] [2021-11-12 22:21:46,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:46,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:21:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:47,529 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:21:47,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554556848] [2021-11-12 22:21:47,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554556848] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:47,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:47,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-12 22:21:47,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533319775] [2021-11-12 22:21:47,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:47,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:21:47,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:21:47,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:21:47,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:21:47,531 INFO L87 Difference]: Start difference. First operand 18959 states and 27868 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:50,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:50,102 INFO L93 Difference]: Finished difference Result 23163 states and 33930 transitions. [2021-11-12 22:21:50,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:21:50,103 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-12 22:21:50,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:50,161 INFO L225 Difference]: With dead ends: 23163 [2021-11-12 22:21:50,161 INFO L226 Difference]: Without dead ends: 23161 [2021-11-12 22:21:50,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:21:50,173 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 1289 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 601.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1289 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.30ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 708.45ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:50,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1289 Valid, 1626 Invalid, 767 Unknown, 0 Unchecked, 9.30ms Time], IncrementalHoareTripleChecker [33 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 708.45ms Time] [2021-11-12 22:21:50,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23161 states. [2021-11-12 22:21:51,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23161 to 18978. [2021-11-12 22:21:51,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18978 states, 18977 states have (on average 1.4696211203035254) internal successors, (27889), 18977 states have internal predecessors, (27889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18978 states to 18978 states and 27889 transitions. [2021-11-12 22:21:51,777 INFO L78 Accepts]: Start accepts. Automaton has 18978 states and 27889 transitions. Word has length 82 [2021-11-12 22:21:51,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:51,777 INFO L470 AbstractCegarLoop]: Abstraction has 18978 states and 27889 transitions. [2021-11-12 22:21:51,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:51,778 INFO L276 IsEmpty]: Start isEmpty. Operand 18978 states and 27889 transitions. [2021-11-12 22:21:51,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-12 22:21:51,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:51,780 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:51,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 22:21:51,780 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:51,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:51,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1815293023, now seen corresponding path program 1 times [2021-11-12 22:21:51,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:21:51,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402911946] [2021-11-12 22:21:51,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:51,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:21:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:52,623 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:21:52,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402911946] [2021-11-12 22:21:52,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402911946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:52,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:52,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-12 22:21:52,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896363608] [2021-11-12 22:21:52,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:52,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:21:52,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:21:52,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:21:52,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:21:52,625 INFO L87 Difference]: Start difference. First operand 18978 states and 27889 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:56,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:56,141 INFO L93 Difference]: Finished difference Result 28937 states and 42418 transitions. [2021-11-12 22:21:56,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:21:56,142 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-12 22:21:56,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:56,189 INFO L225 Difference]: With dead ends: 28937 [2021-11-12 22:21:56,189 INFO L226 Difference]: Without dead ends: 28935 [2021-11-12 22:21:56,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:21:56,197 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 1177 mSDsluCounter, 2133 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 746.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 2508 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.13ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 876.75ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:56,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 2508 Invalid, 989 Unknown, 0 Unchecked, 11.13ms Time], IncrementalHoareTripleChecker [26 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 876.75ms Time] [2021-11-12 22:21:56,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28935 states. [2021-11-12 22:21:57,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28935 to 19001. [2021-11-12 22:21:57,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19001 states, 19000 states have (on average 1.4693157894736841) internal successors, (27917), 19000 states have internal predecessors, (27917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:57,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19001 states to 19001 states and 27917 transitions. [2021-11-12 22:21:57,791 INFO L78 Accepts]: Start accepts. Automaton has 19001 states and 27917 transitions. Word has length 82 [2021-11-12 22:21:57,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:57,791 INFO L470 AbstractCegarLoop]: Abstraction has 19001 states and 27917 transitions. [2021-11-12 22:21:57,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:21:57,792 INFO L276 IsEmpty]: Start isEmpty. Operand 19001 states and 27917 transitions. [2021-11-12 22:21:57,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-12 22:21:57,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:57,794 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:57,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 22:21:57,794 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:57,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:57,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1206852449, now seen corresponding path program 1 times [2021-11-12 22:21:57,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:21:57,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783066097] [2021-11-12 22:21:57,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:57,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:21:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:58,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:58,545 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:21:58,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783066097] [2021-11-12 22:21:58,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783066097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:58,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:58,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-12 22:21:58,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091796347] [2021-11-12 22:21:58,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:58,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:21:58,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:21:58,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:21:58,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:21:58,547 INFO L87 Difference]: Start difference. First operand 19001 states and 27917 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:01,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:01,814 INFO L93 Difference]: Finished difference Result 35762 states and 52518 transitions. [2021-11-12 22:22:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:22:01,815 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-12 22:22:01,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:01,874 INFO L225 Difference]: With dead ends: 35762 [2021-11-12 22:22:01,874 INFO L226 Difference]: Without dead ends: 35760 [2021-11-12 22:22:01,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:22:01,885 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 1211 mSDsluCounter, 3259 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 485.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 3602 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.40ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 596.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:01,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1211 Valid, 3602 Invalid, 881 Unknown, 0 Unchecked, 10.40ms Time], IncrementalHoareTripleChecker [24 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 596.14ms Time] [2021-11-12 22:22:01,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35760 states. [2021-11-12 22:22:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35760 to 20792. [2021-11-12 22:22:03,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20792 states, 20791 states have (on average 1.469722476071377) internal successors, (30557), 20791 states have internal predecessors, (30557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:03,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20792 states to 20792 states and 30557 transitions. [2021-11-12 22:22:03,648 INFO L78 Accepts]: Start accepts. Automaton has 20792 states and 30557 transitions. Word has length 82 [2021-11-12 22:22:03,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:03,648 INFO L470 AbstractCegarLoop]: Abstraction has 20792 states and 30557 transitions. [2021-11-12 22:22:03,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:03,649 INFO L276 IsEmpty]: Start isEmpty. Operand 20792 states and 30557 transitions. [2021-11-12 22:22:03,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 22:22:03,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:03,651 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:03,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-12 22:22:03,651 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:03,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:03,651 INFO L85 PathProgramCache]: Analyzing trace with hash -670987149, now seen corresponding path program 1 times [2021-11-12 22:22:03,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:22:03,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653403372] [2021-11-12 22:22:03,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:03,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:22:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:22:04,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:22:04,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653403372] [2021-11-12 22:22:04,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653403372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:04,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:04,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-12 22:22:04,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510902728] [2021-11-12 22:22:04,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:04,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:22:04,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:22:04,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:22:04,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:22:04,502 INFO L87 Difference]: Start difference. First operand 20792 states and 30557 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:08,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:08,287 INFO L93 Difference]: Finished difference Result 42310 states and 62263 transitions. [2021-11-12 22:22:08,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:22:08,287 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-12 22:22:08,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:08,364 INFO L225 Difference]: With dead ends: 42310 [2021-11-12 22:22:08,364 INFO L226 Difference]: Without dead ends: 42308 [2021-11-12 22:22:08,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:22:08,380 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 1159 mSDsluCounter, 2177 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 351.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 2541 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.95ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 436.71ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:08,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1159 Valid, 2541 Invalid, 676 Unknown, 0 Unchecked, 6.95ms Time], IncrementalHoareTripleChecker [32 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 436.71ms Time] [2021-11-12 22:22:08,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42308 states. [2021-11-12 22:22:10,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42308 to 23396. [2021-11-12 22:22:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23396 states, 23395 states have (on average 1.4711690532164992) internal successors, (34418), 23395 states have internal predecessors, (34418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23396 states to 23396 states and 34418 transitions. [2021-11-12 22:22:10,528 INFO L78 Accepts]: Start accepts. Automaton has 23396 states and 34418 transitions. Word has length 83 [2021-11-12 22:22:10,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:10,529 INFO L470 AbstractCegarLoop]: Abstraction has 23396 states and 34418 transitions. [2021-11-12 22:22:10,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 23396 states and 34418 transitions. [2021-11-12 22:22:10,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 22:22:10,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:10,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:10,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-12 22:22:10,532 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:10,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:10,533 INFO L85 PathProgramCache]: Analyzing trace with hash 178720109, now seen corresponding path program 1 times [2021-11-12 22:22:10,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:22:10,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283257542] [2021-11-12 22:22:10,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:10,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:22:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:22:11,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:22:11,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283257542] [2021-11-12 22:22:11,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283257542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:11,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:11,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-12 22:22:11,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368855384] [2021-11-12 22:22:11,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:11,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-12 22:22:11,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:22:11,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-12 22:22:11,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-11-12 22:22:11,975 INFO L87 Difference]: Start difference. First operand 23396 states and 34418 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:17,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:17,823 INFO L93 Difference]: Finished difference Result 44795 states and 65669 transitions. [2021-11-12 22:22:17,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-12 22:22:17,824 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-12 22:22:17,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:17,898 INFO L225 Difference]: With dead ends: 44795 [2021-11-12 22:22:17,898 INFO L226 Difference]: Without dead ends: 40313 [2021-11-12 22:22:17,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=354, Invalid=1538, Unknown=0, NotChecked=0, Total=1892 [2021-11-12 22:22:17,925 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 1756 mSDsluCounter, 2270 mSDsCounter, 0 mSdLazyCounter, 2769 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1375.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 2467 SdHoareTripleChecker+Invalid, 2821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.59ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1616.50ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:17,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1756 Valid, 2467 Invalid, 2821 Unknown, 0 Unchecked, 15.59ms Time], IncrementalHoareTripleChecker [52 Valid, 2769 Invalid, 0 Unknown, 0 Unchecked, 1616.50ms Time] [2021-11-12 22:22:17,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40313 states. [2021-11-12 22:22:20,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40313 to 29366. [2021-11-12 22:22:20,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29366 states, 29365 states have (on average 1.4666780180486974) internal successors, (43069), 29365 states have internal predecessors, (43069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29366 states to 29366 states and 43069 transitions. [2021-11-12 22:22:20,775 INFO L78 Accepts]: Start accepts. Automaton has 29366 states and 43069 transitions. Word has length 84 [2021-11-12 22:22:20,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:20,775 INFO L470 AbstractCegarLoop]: Abstraction has 29366 states and 43069 transitions. [2021-11-12 22:22:20,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:20,776 INFO L276 IsEmpty]: Start isEmpty. Operand 29366 states and 43069 transitions. [2021-11-12 22:22:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 22:22:20,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:20,778 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:20,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-12 22:22:20,779 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:20,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:20,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1905117811, now seen corresponding path program 1 times [2021-11-12 22:22:20,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:22:20,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305871279] [2021-11-12 22:22:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:20,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:22:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:22:21,701 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:22:21,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305871279] [2021-11-12 22:22:21,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305871279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:21,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:21,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-12 22:22:21,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795918412] [2021-11-12 22:22:21,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:21,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-12 22:22:21,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:22:21,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-12 22:22:21,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:22:21,703 INFO L87 Difference]: Start difference. First operand 29366 states and 43069 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:27,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:27,490 INFO L93 Difference]: Finished difference Result 50221 states and 73427 transitions. [2021-11-12 22:22:27,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:22:27,491 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-12 22:22:27,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:27,583 INFO L225 Difference]: With dead ends: 50221 [2021-11-12 22:22:27,583 INFO L226 Difference]: Without dead ends: 50219 [2021-11-12 22:22:27,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:22:27,595 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 1241 mSDsluCounter, 3016 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 767.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 3284 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.21ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 931.42ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:27,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1241 Valid, 3284 Invalid, 1270 Unknown, 0 Unchecked, 14.21ms Time], IncrementalHoareTripleChecker [28 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 931.42ms Time] [2021-11-12 22:22:27,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50219 states. [2021-11-12 22:22:30,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50219 to 29395. [2021-11-12 22:22:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29395 states, 29394 states have (on average 1.4664217187181057) internal successors, (43104), 29394 states have internal predecessors, (43104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:30,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29395 states to 29395 states and 43104 transitions. [2021-11-12 22:22:30,389 INFO L78 Accepts]: Start accepts. Automaton has 29395 states and 43104 transitions. Word has length 84 [2021-11-12 22:22:30,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:30,390 INFO L470 AbstractCegarLoop]: Abstraction has 29395 states and 43104 transitions. [2021-11-12 22:22:30,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:30,390 INFO L276 IsEmpty]: Start isEmpty. Operand 29395 states and 43104 transitions. [2021-11-12 22:22:30,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 22:22:30,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:30,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:30,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-12 22:22:30,394 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:30,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:30,394 INFO L85 PathProgramCache]: Analyzing trace with hash -762471091, now seen corresponding path program 1 times [2021-11-12 22:22:30,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:22:30,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067554869] [2021-11-12 22:22:30,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:30,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:22:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:22:31,322 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:22:31,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067554869] [2021-11-12 22:22:31,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067554869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:31,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:31,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-12 22:22:31,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477352036] [2021-11-12 22:22:31,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:31,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-12 22:22:31,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:22:31,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-12 22:22:31,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:22:31,324 INFO L87 Difference]: Start difference. First operand 29395 states and 43104 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:37,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:37,121 INFO L93 Difference]: Finished difference Result 44652 states and 65339 transitions. [2021-11-12 22:22:37,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:22:37,121 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-12 22:22:37,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:37,195 INFO L225 Difference]: With dead ends: 44652 [2021-11-12 22:22:37,196 INFO L226 Difference]: Without dead ends: 44650 [2021-11-12 22:22:37,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:22:37,205 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 1243 mSDsluCounter, 3745 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1086.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 4100 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.60ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1275.73ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:37,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1243 Valid, 4100 Invalid, 1525 Unknown, 0 Unchecked, 15.60ms Time], IncrementalHoareTripleChecker [31 Valid, 1494 Invalid, 0 Unknown, 0 Unchecked, 1275.73ms Time] [2021-11-12 22:22:37,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44650 states. [2021-11-12 22:22:40,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44650 to 29395. [2021-11-12 22:22:40,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29395 states, 29394 states have (on average 1.4664217187181057) internal successors, (43104), 29394 states have internal predecessors, (43104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29395 states to 29395 states and 43104 transitions. [2021-11-12 22:22:40,095 INFO L78 Accepts]: Start accepts. Automaton has 29395 states and 43104 transitions. Word has length 84 [2021-11-12 22:22:40,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:40,096 INFO L470 AbstractCegarLoop]: Abstraction has 29395 states and 43104 transitions. [2021-11-12 22:22:40,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:40,096 INFO L276 IsEmpty]: Start isEmpty. Operand 29395 states and 43104 transitions. [2021-11-12 22:22:40,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 22:22:40,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:40,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:40,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-12 22:22:40,099 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:40,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:40,100 INFO L85 PathProgramCache]: Analyzing trace with hash -75870771, now seen corresponding path program 1 times [2021-11-12 22:22:40,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:22:40,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783993220] [2021-11-12 22:22:40,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:40,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:22:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:22:41,248 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:22:41,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783993220] [2021-11-12 22:22:41,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783993220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:41,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:41,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-12 22:22:41,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956229413] [2021-11-12 22:22:41,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:41,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-12 22:22:41,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:22:41,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-12 22:22:41,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:22:41,250 INFO L87 Difference]: Start difference. First operand 29395 states and 43104 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:46,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:46,713 INFO L93 Difference]: Finished difference Result 35836 states and 52381 transitions. [2021-11-12 22:22:46,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 22:22:46,713 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-12 22:22:46,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:46,781 INFO L225 Difference]: With dead ends: 35836 [2021-11-12 22:22:46,782 INFO L226 Difference]: Without dead ends: 35834 [2021-11-12 22:22:46,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-11-12 22:22:46,797 INFO L933 BasicCegarLoop]: 472 mSDtfsCounter, 1188 mSDsluCounter, 3943 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1409.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 4359 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.63ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1639.47ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:46,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1188 Valid, 4359 Invalid, 1924 Unknown, 0 Unchecked, 16.63ms Time], IncrementalHoareTripleChecker [23 Valid, 1901 Invalid, 0 Unknown, 0 Unchecked, 1639.47ms Time] [2021-11-12 22:22:46,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35834 states. [2021-11-12 22:22:49,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35834 to 30519. [2021-11-12 22:22:49,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30519 states, 30518 states have (on average 1.4650042597811128) internal successors, (44709), 30518 states have internal predecessors, (44709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:49,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30519 states to 30519 states and 44709 transitions. [2021-11-12 22:22:49,998 INFO L78 Accepts]: Start accepts. Automaton has 30519 states and 44709 transitions. Word has length 84 [2021-11-12 22:22:49,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:49,998 INFO L470 AbstractCegarLoop]: Abstraction has 30519 states and 44709 transitions. [2021-11-12 22:22:49,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:49,998 INFO L276 IsEmpty]: Start isEmpty. Operand 30519 states and 44709 transitions. [2021-11-12 22:22:50,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 22:22:50,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:50,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:50,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-12 22:22:50,002 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:50,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:50,002 INFO L85 PathProgramCache]: Analyzing trace with hash -533643891, now seen corresponding path program 1 times [2021-11-12 22:22:50,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:22:50,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144580018] [2021-11-12 22:22:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:50,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:22:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:22:51,010 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:22:51,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144580018] [2021-11-12 22:22:51,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144580018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:51,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:51,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-12 22:22:51,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332069725] [2021-11-12 22:22:51,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:51,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-12 22:22:51,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:22:51,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-12 22:22:51,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:22:51,012 INFO L87 Difference]: Start difference. First operand 30519 states and 44709 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:55,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:55,797 INFO L93 Difference]: Finished difference Result 40525 states and 59218 transitions. [2021-11-12 22:22:55,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:22:55,798 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-12 22:22:55,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:55,867 INFO L225 Difference]: With dead ends: 40525 [2021-11-12 22:22:55,867 INFO L226 Difference]: Without dead ends: 36043 [2021-11-12 22:22:55,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:22:55,886 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 1111 mSDsluCounter, 3117 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 710.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 3471 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.27ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 844.18ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:55,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1111 Valid, 3471 Invalid, 997 Unknown, 0 Unchecked, 12.27ms Time], IncrementalHoareTripleChecker [20 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 844.18ms Time] [2021-11-12 22:22:55,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36043 states. [2021-11-12 22:22:59,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36043 to 30517. [2021-11-12 22:22:59,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30517 states, 30516 states have (on average 1.4650347358762617) internal successors, (44707), 30516 states have internal predecessors, (44707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30517 states to 30517 states and 44707 transitions. [2021-11-12 22:22:59,243 INFO L78 Accepts]: Start accepts. Automaton has 30517 states and 44707 transitions. Word has length 84 [2021-11-12 22:22:59,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:59,243 INFO L470 AbstractCegarLoop]: Abstraction has 30517 states and 44707 transitions. [2021-11-12 22:22:59,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:22:59,244 INFO L276 IsEmpty]: Start isEmpty. Operand 30517 states and 44707 transitions. [2021-11-12 22:22:59,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 22:22:59,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:59,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:59,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-12 22:22:59,247 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:59,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:59,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1677485485, now seen corresponding path program 1 times [2021-11-12 22:22:59,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:22:59,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167901725] [2021-11-12 22:22:59,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:59,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:22:59,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:00,228 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:23:00,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167901725] [2021-11-12 22:23:00,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167901725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:00,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:00,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-12 22:23:00,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519753760] [2021-11-12 22:23:00,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:00,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-12 22:23:00,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:23:00,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-12 22:23:00,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:23:00,230 INFO L87 Difference]: Start difference. First operand 30517 states and 44707 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:23:06,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:06,739 INFO L93 Difference]: Finished difference Result 46909 states and 68555 transitions. [2021-11-12 22:23:06,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:23:06,739 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-12 22:23:06,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:06,824 INFO L225 Difference]: With dead ends: 46909 [2021-11-12 22:23:06,824 INFO L226 Difference]: Without dead ends: 46907 [2021-11-12 22:23:06,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:23:06,842 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 1141 mSDsluCounter, 3984 mSDsCounter, 0 mSdLazyCounter, 1793 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1095.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 4321 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.88ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1287.33ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:06,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1141 Valid, 4321 Invalid, 1813 Unknown, 0 Unchecked, 16.88ms Time], IncrementalHoareTripleChecker [20 Valid, 1793 Invalid, 0 Unknown, 0 Unchecked, 1287.33ms Time] [2021-11-12 22:23:06,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46907 states. [2021-11-12 22:23:10,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46907 to 30525. [2021-11-12 22:23:10,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30525 states, 30524 states have (on average 1.4650111387760452) internal successors, (44718), 30524 states have internal predecessors, (44718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:23:10,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30525 states to 30525 states and 44718 transitions. [2021-11-12 22:23:10,956 INFO L78 Accepts]: Start accepts. Automaton has 30525 states and 44718 transitions. Word has length 84 [2021-11-12 22:23:10,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:10,957 INFO L470 AbstractCegarLoop]: Abstraction has 30525 states and 44718 transitions. [2021-11-12 22:23:10,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:23:10,957 INFO L276 IsEmpty]: Start isEmpty. Operand 30525 states and 44718 transitions. [2021-11-12 22:23:10,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 22:23:10,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:10,959 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:23:10,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-12 22:23:10,960 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:23:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:10,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1076849933, now seen corresponding path program 1 times [2021-11-12 22:23:10,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:23:10,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020424883] [2021-11-12 22:23:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:10,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:23:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:12,014 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:23:12,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020424883] [2021-11-12 22:23:12,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020424883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:12,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:12,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-12 22:23:12,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825665105] [2021-11-12 22:23:12,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:12,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-12 22:23:12,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:23:12,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-12 22:23:12,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:23:12,016 INFO L87 Difference]: Start difference. First operand 30525 states and 44718 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:23:18,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:18,796 INFO L93 Difference]: Finished difference Result 49210 states and 71937 transitions. [2021-11-12 22:23:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:23:18,796 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-12 22:23:18,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:18,875 INFO L225 Difference]: With dead ends: 49210 [2021-11-12 22:23:18,875 INFO L226 Difference]: Without dead ends: 49208 [2021-11-12 22:23:18,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:23:18,886 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 1119 mSDsluCounter, 2673 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 710.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 2964 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.55ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 892.33ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:18,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1119 Valid, 2964 Invalid, 1047 Unknown, 0 Unchecked, 11.55ms Time], IncrementalHoareTripleChecker [28 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 892.33ms Time] [2021-11-12 22:23:18,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49208 states. [2021-11-12 22:23:22,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49208 to 30540. [2021-11-12 22:23:22,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30540 states, 30539 states have (on average 1.464979206915747) internal successors, (44739), 30539 states have internal predecessors, (44739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:23:23,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30540 states to 30540 states and 44739 transitions. [2021-11-12 22:23:23,004 INFO L78 Accepts]: Start accepts. Automaton has 30540 states and 44739 transitions. Word has length 84 [2021-11-12 22:23:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:23,005 INFO L470 AbstractCegarLoop]: Abstraction has 30540 states and 44739 transitions. [2021-11-12 22:23:23,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:23:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 30540 states and 44739 transitions. [2021-11-12 22:23:23,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 22:23:23,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:23,007 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:23:23,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-12 22:23:23,008 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:23:23,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:23,008 INFO L85 PathProgramCache]: Analyzing trace with hash 350262605, now seen corresponding path program 1 times [2021-11-12 22:23:23,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:23:23,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984048064] [2021-11-12 22:23:23,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:23,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:23:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:24,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:23:24,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984048064] [2021-11-12 22:23:24,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984048064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:24,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:24,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-12 22:23:24,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171105103] [2021-11-12 22:23:24,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:24,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-12 22:23:24,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:23:24,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-12 22:23:24,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-11-12 22:23:24,445 INFO L87 Difference]: Start difference. First operand 30540 states and 44739 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:23:34,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:34,159 INFO L93 Difference]: Finished difference Result 56968 states and 83444 transitions. [2021-11-12 22:23:34,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-12 22:23:34,160 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-12 22:23:34,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:34,257 INFO L225 Difference]: With dead ends: 56968 [2021-11-12 22:23:34,257 INFO L226 Difference]: Without dead ends: 52486 [2021-11-12 22:23:34,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=334, Invalid=1472, Unknown=0, NotChecked=0, Total=1806 [2021-11-12 22:23:34,272 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 1514 mSDsluCounter, 3082 mSDsCounter, 0 mSdLazyCounter, 3955 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2067.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1514 SdHoareTripleChecker+Valid, 3346 SdHoareTripleChecker+Invalid, 3984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.14ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2564.78ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:34,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1514 Valid, 3346 Invalid, 3984 Unknown, 0 Unchecked, 21.14ms Time], IncrementalHoareTripleChecker [29 Valid, 3955 Invalid, 0 Unknown, 0 Unchecked, 2564.78ms Time] [2021-11-12 22:23:34,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52486 states.