./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/bin/utaipan-Q6hlc19bkW --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 b5032f6ecc7a7304ce28757cb2a6aad82a2091f27bc978e38426a37817981d0c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:02:26,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:02:26,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:02:26,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:02:26,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:02:26,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:02:26,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:02:26,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:02:26,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:02:26,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:02:26,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:02:26,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:02:26,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:02:26,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:02:26,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:02:26,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:02:26,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:02:26,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:02:26,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:02:26,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:02:26,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:02:26,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:02:26,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:02:26,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:02:26,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:02:26,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:02:26,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:02:26,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:02:26,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:02:26,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:02:26,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:02:26,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:02:26,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:02:26,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:02:26,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:02:26,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:02:26,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:02:26,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:02:26,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:02:26,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:02:26,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:02:26,413 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:02:26,453 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:02:26,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:02:26,454 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:02:26,454 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:02:26,455 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:02:26,455 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:02:26,455 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:02:26,455 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:02:26,456 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:02:26,456 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:02:26,456 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:02:26,456 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:02:26,456 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:02:26,456 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:02:26,457 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:02:26,457 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:02:26,457 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:02:26,457 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:02:26,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:02:26,458 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:02:26,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:02:26,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:02:26,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:02:26,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:02:26,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:02:26,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:02:26,470 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:02:26,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:02:26,471 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:02:26,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:02:26,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:02:26,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:02:26,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:02:26,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:02:26,472 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:02:26,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:02:26,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:02:26,474 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:02:26,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:02:26,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:02:26,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:02:26,475 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5032f6ecc7a7304ce28757cb2a6aad82a2091f27bc978e38426a37817981d0c [2022-11-23 15:02:26,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:02:26,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:02:26,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:02:26,769 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:02:26,770 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:02:26,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c [2022-11-23 15:02:29,742 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:02:30,149 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:02:30,156 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c [2022-11-23 15:02:30,181 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/bin/utaipan-Q6hlc19bkW/data/0da39e57b/c02bf4d93e384be9a9bd0b997cfcf0b9/FLAG42480f337 [2022-11-23 15:02:30,204 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/bin/utaipan-Q6hlc19bkW/data/0da39e57b/c02bf4d93e384be9a9bd0b997cfcf0b9 [2022-11-23 15:02:30,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:02:30,212 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:02:30,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:02:30,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:02:30,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:02:30,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:02:30" (1/1) ... [2022-11-23 15:02:30,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@569ab9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:30, skipping insertion in model container [2022-11-23 15:02:30,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:02:30" (1/1) ... [2022-11-23 15:02:30,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:02:30,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:02:30,518 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c[1545,1558] [2022-11-23 15:02:30,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:02:30,997 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:02:31,010 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c[1545,1558] [2022-11-23 15:02:31,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:02:31,123 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:02:31,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:31 WrapperNode [2022-11-23 15:02:31,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:02:31,125 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:02:31,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:02:31,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:02:31,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:31" (1/1) ... [2022-11-23 15:02:31,173 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:31" (1/1) ... [2022-11-23 15:02:31,236 INFO L138 Inliner]: procedures = 95, calls = 348, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 909 [2022-11-23 15:02:31,237 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:02:31,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:02:31,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:02:31,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:02:31,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:31" (1/1) ... [2022-11-23 15:02:31,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:31" (1/1) ... [2022-11-23 15:02:31,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:31" (1/1) ... [2022-11-23 15:02:31,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:31" (1/1) ... [2022-11-23 15:02:31,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:31" (1/1) ... [2022-11-23 15:02:31,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:31" (1/1) ... [2022-11-23 15:02:31,359 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:31" (1/1) ... [2022-11-23 15:02:31,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:31" (1/1) ... [2022-11-23 15:02:31,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:02:31,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:02:31,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:02:31,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:02:31,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:31" (1/1) ... [2022-11-23 15:02:31,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:02:31,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:02:31,420 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:02:31,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:02:31,475 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-23 15:02:31,476 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-23 15:02:31,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:02:31,476 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-23 15:02:31,476 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-23 15:02:31,476 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-23 15:02:31,477 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-23 15:02:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-23 15:02:31,477 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-23 15:02:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-23 15:02:31,477 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-23 15:02:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-23 15:02:31,478 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-23 15:02:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-23 15:02:31,478 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-23 15:02:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 15:02:31,478 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 15:02:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 15:02:31,479 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 15:02:31,479 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-23 15:02:31,479 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-23 15:02:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-23 15:02:31,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-23 15:02:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-23 15:02:31,481 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-23 15:02:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-23 15:02:31,482 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-23 15:02:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-23 15:02:31,482 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-23 15:02:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-23 15:02:31,482 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-23 15:02:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-23 15:02:31,483 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-23 15:02:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-23 15:02:31,483 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-23 15:02:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-23 15:02:31,484 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-23 15:02:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-23 15:02:31,484 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-23 15:02:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-23 15:02:31,484 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-23 15:02:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:02:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-23 15:02:31,485 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-23 15:02:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-23 15:02:31,485 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-23 15:02:31,486 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-23 15:02:31,486 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-23 15:02:31,487 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-23 15:02:31,487 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-23 15:02:31,487 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-11-23 15:02:31,487 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-11-23 15:02:31,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:02:31,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:02:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-23 15:02:31,488 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-23 15:02:31,722 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:02:31,724 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:02:32,841 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:02:33,725 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:02:33,726 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:02:33,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:02:33 BoogieIcfgContainer [2022-11-23 15:02:33,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:02:33,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:02:33,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:02:33,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:02:33,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:02:30" (1/3) ... [2022-11-23 15:02:33,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec84153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:02:33, skipping insertion in model container [2022-11-23 15:02:33,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:31" (2/3) ... [2022-11-23 15:02:33,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec84153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:02:33, skipping insertion in model container [2022-11-23 15:02:33,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:02:33" (3/3) ... [2022-11-23 15:02:33,743 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product30.cil.c [2022-11-23 15:02:33,765 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:02:33,766 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:02:33,849 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:02:33,857 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@682794bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:02:33,858 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:02:33,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 261 states have (on average 1.5862068965517242) internal successors, (414), 284 states have internal predecessors, (414), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (101), 94 states have call predecessors, (101), 101 states have call successors, (101) [2022-11-23 15:02:33,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 15:02:33,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:33,879 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:02:33,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:02:33,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:33,884 INFO L85 PathProgramCache]: Analyzing trace with hash -928472709, now seen corresponding path program 1 times [2022-11-23 15:02:33,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:33,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777013594] [2022-11-23 15:02:33,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:33,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:02:34,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:34,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777013594] [2022-11-23 15:02:34,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777013594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:02:34,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:02:34,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:02:34,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120044462] [2022-11-23 15:02:34,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:02:34,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:02:34,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:34,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:02:34,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:02:35,001 INFO L87 Difference]: Start difference. First operand has 390 states, 261 states have (on average 1.5862068965517242) internal successors, (414), 284 states have internal predecessors, (414), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (101), 94 states have call predecessors, (101), 101 states have call successors, (101) Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-23 15:02:37,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:37,802 INFO L93 Difference]: Finished difference Result 1260 states and 2036 transitions. [2022-11-23 15:02:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:02:37,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2022-11-23 15:02:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:37,827 INFO L225 Difference]: With dead ends: 1260 [2022-11-23 15:02:37,827 INFO L226 Difference]: Without dead ends: 887 [2022-11-23 15:02:37,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:02:37,838 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1242 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1668 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1309 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 1668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:02:37,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1309 Valid, 1112 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 1668 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-23 15:02:37,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-11-23 15:02:37,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 800. [2022-11-23 15:02:37,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 561 states have (on average 1.6007130124777185) internal successors, (898), 591 states have internal predecessors, (898), 193 states have call successors, (193), 44 states have call predecessors, (193), 45 states have return successors, (195), 177 states have call predecessors, (195), 188 states have call successors, (195) [2022-11-23 15:02:37,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1286 transitions. [2022-11-23 15:02:37,985 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1286 transitions. Word has length 54 [2022-11-23 15:02:37,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:37,992 INFO L495 AbstractCegarLoop]: Abstraction has 800 states and 1286 transitions. [2022-11-23 15:02:37,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-23 15:02:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1286 transitions. [2022-11-23 15:02:38,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 15:02:38,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:38,009 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:02:38,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:02:38,010 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:02:38,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:38,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1757354683, now seen corresponding path program 1 times [2022-11-23 15:02:38,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:38,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385554189] [2022-11-23 15:02:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:38,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:02:38,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:38,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385554189] [2022-11-23 15:02:38,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385554189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:02:38,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:02:38,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:02:38,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836061335] [2022-11-23 15:02:38,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:02:38,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:02:38,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:38,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:02:38,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:02:38,623 INFO L87 Difference]: Start difference. First operand 800 states and 1286 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 15:02:38,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:38,977 INFO L93 Difference]: Finished difference Result 1767 states and 2881 transitions. [2022-11-23 15:02:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:02:38,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 87 [2022-11-23 15:02:38,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:38,986 INFO L225 Difference]: With dead ends: 1767 [2022-11-23 15:02:38,987 INFO L226 Difference]: Without dead ends: 991 [2022-11-23 15:02:38,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:02:38,993 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 177 mSDsluCounter, 1711 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2332 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:02:38,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2332 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:02:38,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-11-23 15:02:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 806. [2022-11-23 15:02:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 567 states have (on average 1.5943562610229276) internal successors, (904), 597 states have internal predecessors, (904), 193 states have call successors, (193), 44 states have call predecessors, (193), 45 states have return successors, (195), 177 states have call predecessors, (195), 188 states have call successors, (195) [2022-11-23 15:02:39,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1292 transitions. [2022-11-23 15:02:39,070 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1292 transitions. Word has length 87 [2022-11-23 15:02:39,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:39,070 INFO L495 AbstractCegarLoop]: Abstraction has 806 states and 1292 transitions. [2022-11-23 15:02:39,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 15:02:39,071 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1292 transitions. [2022-11-23 15:02:39,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-23 15:02:39,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:39,075 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:02:39,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:02:39,076 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:02:39,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:39,076 INFO L85 PathProgramCache]: Analyzing trace with hash -297931558, now seen corresponding path program 1 times [2022-11-23 15:02:39,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:39,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822342467] [2022-11-23 15:02:39,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:39,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:02:39,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:39,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822342467] [2022-11-23 15:02:39,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822342467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:02:39,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:02:39,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 15:02:39,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546749546] [2022-11-23 15:02:39,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:02:39,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:02:39,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:39,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:02:39,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:02:39,563 INFO L87 Difference]: Start difference. First operand 806 states and 1292 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-23 15:02:43,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:43,439 INFO L93 Difference]: Finished difference Result 2768 states and 4483 transitions. [2022-11-23 15:02:43,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 15:02:43,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 88 [2022-11-23 15:02:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:43,454 INFO L225 Difference]: With dead ends: 2768 [2022-11-23 15:02:43,454 INFO L226 Difference]: Without dead ends: 1985 [2022-11-23 15:02:43,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-23 15:02:43,461 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 1365 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 4478 mSolverCounterSat, 690 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1440 SdHoareTripleChecker+Valid, 2161 SdHoareTripleChecker+Invalid, 5168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 690 IncrementalHoareTripleChecker+Valid, 4478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:02:43,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1440 Valid, 2161 Invalid, 5168 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [690 Valid, 4478 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-23 15:02:43,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2022-11-23 15:02:43,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1798. [2022-11-23 15:02:43,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1232 states have (on average 1.5665584415584415) internal successors, (1930), 1304 states have internal predecessors, (1930), 474 states have call successors, (474), 79 states have call predecessors, (474), 91 states have return successors, (493), 447 states have call predecessors, (493), 469 states have call successors, (493) [2022-11-23 15:02:43,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2897 transitions. [2022-11-23 15:02:43,618 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2897 transitions. Word has length 88 [2022-11-23 15:02:43,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:43,618 INFO L495 AbstractCegarLoop]: Abstraction has 1798 states and 2897 transitions. [2022-11-23 15:02:43,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-23 15:02:43,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2897 transitions. [2022-11-23 15:02:43,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-23 15:02:43,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:43,622 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:02:43,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:02:43,622 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:02:43,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:43,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1078003022, now seen corresponding path program 1 times [2022-11-23 15:02:43,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:43,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958549248] [2022-11-23 15:02:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:43,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:02:44,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:44,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958549248] [2022-11-23 15:02:44,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958549248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:02:44,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:02:44,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-23 15:02:44,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074174601] [2022-11-23 15:02:44,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:02:44,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:02:44,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:44,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:02:44,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:02:44,182 INFO L87 Difference]: Start difference. First operand 1798 states and 2897 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 6 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-23 15:02:47,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:47,802 INFO L93 Difference]: Finished difference Result 5045 states and 8154 transitions. [2022-11-23 15:02:47,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 15:02:47,807 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 6 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 89 [2022-11-23 15:02:47,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:47,832 INFO L225 Difference]: With dead ends: 5045 [2022-11-23 15:02:47,832 INFO L226 Difference]: Without dead ends: 3272 [2022-11-23 15:02:47,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-11-23 15:02:47,852 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 1752 mSDsluCounter, 2200 mSDsCounter, 0 mSdLazyCounter, 4031 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1817 SdHoareTripleChecker+Valid, 2610 SdHoareTripleChecker+Invalid, 4635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 4031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:02:47,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1817 Valid, 2610 Invalid, 4635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 4031 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-23 15:02:47,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2022-11-23 15:02:48,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 3110. [2022-11-23 15:02:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3110 states, 2206 states have (on average 1.5897552130553037) internal successors, (3507), 2297 states have internal predecessors, (3507), 732 states have call successors, (732), 141 states have call predecessors, (732), 171 states have return successors, (795), 715 states have call predecessors, (795), 727 states have call successors, (795) [2022-11-23 15:02:48,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3110 states to 3110 states and 5034 transitions. [2022-11-23 15:02:48,149 INFO L78 Accepts]: Start accepts. Automaton has 3110 states and 5034 transitions. Word has length 89 [2022-11-23 15:02:48,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:48,150 INFO L495 AbstractCegarLoop]: Abstraction has 3110 states and 5034 transitions. [2022-11-23 15:02:48,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 6 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-23 15:02:48,150 INFO L276 IsEmpty]: Start isEmpty. Operand 3110 states and 5034 transitions. [2022-11-23 15:02:48,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-23 15:02:48,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:48,154 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:02:48,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:02:48,154 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:02:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:48,155 INFO L85 PathProgramCache]: Analyzing trace with hash 161028296, now seen corresponding path program 1 times [2022-11-23 15:02:48,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:48,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098479452] [2022-11-23 15:02:48,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:48,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:02:48,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:48,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098479452] [2022-11-23 15:02:48,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098479452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:02:48,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:02:48,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:02:48,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144279780] [2022-11-23 15:02:48,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:02:48,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:02:48,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:48,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:02:48,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:02:48,537 INFO L87 Difference]: Start difference. First operand 3110 states and 5034 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 15:02:48,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:48,941 INFO L93 Difference]: Finished difference Result 5549 states and 9002 transitions. [2022-11-23 15:02:48,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:02:48,942 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 94 [2022-11-23 15:02:48,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:48,963 INFO L225 Difference]: With dead ends: 5549 [2022-11-23 15:02:48,963 INFO L226 Difference]: Without dead ends: 3222 [2022-11-23 15:02:48,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:02:48,978 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 7 mSDsluCounter, 2814 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3385 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:02:48,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3385 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:02:48,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2022-11-23 15:02:49,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 3180. [2022-11-23 15:02:49,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3180 states, 2256 states have (on average 1.5766843971631206) internal successors, (3557), 2347 states have internal predecessors, (3557), 732 states have call successors, (732), 141 states have call predecessors, (732), 191 states have return successors, (845), 735 states have call predecessors, (845), 727 states have call successors, (845) [2022-11-23 15:02:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3180 states to 3180 states and 5134 transitions. [2022-11-23 15:02:49,273 INFO L78 Accepts]: Start accepts. Automaton has 3180 states and 5134 transitions. Word has length 94 [2022-11-23 15:02:49,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:49,273 INFO L495 AbstractCegarLoop]: Abstraction has 3180 states and 5134 transitions. [2022-11-23 15:02:49,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 15:02:49,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3180 states and 5134 transitions. [2022-11-23 15:02:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-23 15:02:49,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:49,277 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:02:49,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:02:49,277 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:02:49,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:49,278 INFO L85 PathProgramCache]: Analyzing trace with hash 279441064, now seen corresponding path program 1 times [2022-11-23 15:02:49,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:49,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140641101] [2022-11-23 15:02:49,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:49,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:02:49,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:49,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140641101] [2022-11-23 15:02:49,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140641101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:02:49,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:02:49,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:02:49,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979265593] [2022-11-23 15:02:49,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:02:49,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:02:49,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:49,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:02:49,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:02:49,633 INFO L87 Difference]: Start difference. First operand 3180 states and 5134 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 15:02:50,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:50,068 INFO L93 Difference]: Finished difference Result 5655 states and 9142 transitions. [2022-11-23 15:02:50,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:02:50,070 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 94 [2022-11-23 15:02:50,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:50,091 INFO L225 Difference]: With dead ends: 5655 [2022-11-23 15:02:50,092 INFO L226 Difference]: Without dead ends: 3272 [2022-11-23 15:02:50,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:02:50,105 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 6 mSDsluCounter, 2829 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3404 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:02:50,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3404 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:02:50,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2022-11-23 15:02:50,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 3190. [2022-11-23 15:02:50,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3190 states, 2266 states have (on average 1.5741394527802295) internal successors, (3567), 2347 states have internal predecessors, (3567), 732 states have call successors, (732), 141 states have call predecessors, (732), 191 states have return successors, (845), 745 states have call predecessors, (845), 727 states have call successors, (845) [2022-11-23 15:02:50,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3190 states to 3190 states and 5144 transitions. [2022-11-23 15:02:50,338 INFO L78 Accepts]: Start accepts. Automaton has 3190 states and 5144 transitions. Word has length 94 [2022-11-23 15:02:50,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:50,339 INFO L495 AbstractCegarLoop]: Abstraction has 3190 states and 5144 transitions. [2022-11-23 15:02:50,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 15:02:50,339 INFO L276 IsEmpty]: Start isEmpty. Operand 3190 states and 5144 transitions. [2022-11-23 15:02:50,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-23 15:02:50,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:50,342 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:02:50,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:02:50,343 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:02:50,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:50,343 INFO L85 PathProgramCache]: Analyzing trace with hash -338251077, now seen corresponding path program 1 times [2022-11-23 15:02:50,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:50,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857694447] [2022-11-23 15:02:50,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:50,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:02:50,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:50,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857694447] [2022-11-23 15:02:50,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857694447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:02:50,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:02:50,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:02:50,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174176024] [2022-11-23 15:02:50,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:02:50,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:02:50,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:50,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:02:50,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:02:50,829 INFO L87 Difference]: Start difference. First operand 3190 states and 5144 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 15:02:51,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:51,223 INFO L93 Difference]: Finished difference Result 5673 states and 9160 transitions. [2022-11-23 15:02:51,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:02:51,224 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 93 [2022-11-23 15:02:51,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:51,247 INFO L225 Difference]: With dead ends: 5673 [2022-11-23 15:02:51,247 INFO L226 Difference]: Without dead ends: 3282 [2022-11-23 15:02:51,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:02:51,261 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 7 mSDsluCounter, 2814 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3385 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:02:51,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3385 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:02:51,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2022-11-23 15:02:51,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 3200. [2022-11-23 15:02:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3200 states, 2276 states have (on average 1.5716168717047452) internal successors, (3577), 2347 states have internal predecessors, (3577), 732 states have call successors, (732), 141 states have call predecessors, (732), 191 states have return successors, (845), 755 states have call predecessors, (845), 727 states have call successors, (845) [2022-11-23 15:02:51,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5154 transitions. [2022-11-23 15:02:51,560 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5154 transitions. Word has length 93 [2022-11-23 15:02:51,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:51,561 INFO L495 AbstractCegarLoop]: Abstraction has 3200 states and 5154 transitions. [2022-11-23 15:02:51,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 15:02:51,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5154 transitions. [2022-11-23 15:02:51,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-23 15:02:51,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:51,566 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:02:51,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:02:51,567 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:02:51,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:51,567 INFO L85 PathProgramCache]: Analyzing trace with hash -68575904, now seen corresponding path program 1 times [2022-11-23 15:02:51,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:51,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438051995] [2022-11-23 15:02:51,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:51,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:02:52,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:52,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438051995] [2022-11-23 15:02:52,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438051995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:02:52,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:02:52,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 15:02:52,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577041915] [2022-11-23 15:02:52,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:02:52,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:02:52,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:52,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:02:52,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:02:52,040 INFO L87 Difference]: Start difference. First operand 3200 states and 5154 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 7 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2022-11-23 15:02:54,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:54,919 INFO L93 Difference]: Finished difference Result 7984 states and 12948 transitions. [2022-11-23 15:02:54,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:02:54,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 7 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) Word has length 98 [2022-11-23 15:02:54,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:54,957 INFO L225 Difference]: With dead ends: 7984 [2022-11-23 15:02:54,958 INFO L226 Difference]: Without dead ends: 5343 [2022-11-23 15:02:54,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:02:54,978 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 1747 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1912 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:02:54,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1912 Valid, 1394 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [719 Valid, 2371 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-23 15:02:55,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5343 states. [2022-11-23 15:02:55,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5343 to 5204. [2022-11-23 15:02:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5204 states, 3627 states have (on average 1.533498759305211) internal successors, (5562), 3768 states have internal predecessors, (5562), 1246 states have call successors, (1246), 250 states have call predecessors, (1246), 330 states have return successors, (1466), 1262 states have call predecessors, (1466), 1241 states have call successors, (1466) [2022-11-23 15:02:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5204 states to 5204 states and 8274 transitions. [2022-11-23 15:02:55,461 INFO L78 Accepts]: Start accepts. Automaton has 5204 states and 8274 transitions. Word has length 98 [2022-11-23 15:02:55,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:55,461 INFO L495 AbstractCegarLoop]: Abstraction has 5204 states and 8274 transitions. [2022-11-23 15:02:55,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 7 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2022-11-23 15:02:55,462 INFO L276 IsEmpty]: Start isEmpty. Operand 5204 states and 8274 transitions. [2022-11-23 15:02:55,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 15:02:55,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:55,466 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:02:55,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:02:55,467 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:02:55,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:55,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2134922000, now seen corresponding path program 1 times [2022-11-23 15:02:55,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:55,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361731295] [2022-11-23 15:02:55,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:55,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:02:55,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:55,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361731295] [2022-11-23 15:02:55,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361731295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:02:55,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:02:55,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:02:55,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711073284] [2022-11-23 15:02:55,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:02:55,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:02:55,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:55,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:02:55,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:02:55,898 INFO L87 Difference]: Start difference. First operand 5204 states and 8274 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-23 15:03:00,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:00,017 INFO L93 Difference]: Finished difference Result 17057 states and 27861 transitions. [2022-11-23 15:03:00,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:03:00,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 101 [2022-11-23 15:03:00,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:00,103 INFO L225 Difference]: With dead ends: 17057 [2022-11-23 15:03:00,104 INFO L226 Difference]: Without dead ends: 11878 [2022-11-23 15:03:00,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:03:00,138 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 2224 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 2971 mSolverCounterSat, 965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2337 SdHoareTripleChecker+Valid, 1783 SdHoareTripleChecker+Invalid, 3936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 965 IncrementalHoareTripleChecker+Valid, 2971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:00,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2337 Valid, 1783 Invalid, 3936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [965 Valid, 2971 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-23 15:03:00,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11878 states. [2022-11-23 15:03:01,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11878 to 10987. [2022-11-23 15:03:01,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10987 states, 7507 states have (on average 1.5255095244438523) internal successors, (11452), 7910 states have internal predecessors, (11452), 2806 states have call successors, (2806), 508 states have call predecessors, (2806), 673 states have return successors, (3468), 2799 states have call predecessors, (3468), 2801 states have call successors, (3468) [2022-11-23 15:03:01,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10987 states to 10987 states and 17726 transitions. [2022-11-23 15:03:01,190 INFO L78 Accepts]: Start accepts. Automaton has 10987 states and 17726 transitions. Word has length 101 [2022-11-23 15:03:01,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:01,191 INFO L495 AbstractCegarLoop]: Abstraction has 10987 states and 17726 transitions. [2022-11-23 15:03:01,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-23 15:03:01,192 INFO L276 IsEmpty]: Start isEmpty. Operand 10987 states and 17726 transitions. [2022-11-23 15:03:01,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 15:03:01,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:01,196 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:01,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:03:01,196 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:01,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:01,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1945682801, now seen corresponding path program 1 times [2022-11-23 15:03:01,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:01,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116242519] [2022-11-23 15:03:01,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:01,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:03:01,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:01,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116242519] [2022-11-23 15:03:01,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116242519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:01,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:03:01,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:03:01,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805173537] [2022-11-23 15:03:01,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:01,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:03:01,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:01,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:03:01,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:03:01,738 INFO L87 Difference]: Start difference. First operand 10987 states and 17726 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-23 15:03:04,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:04,957 INFO L93 Difference]: Finished difference Result 21680 states and 35142 transitions. [2022-11-23 15:03:04,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:03:04,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 102 [2022-11-23 15:03:04,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:05,024 INFO L225 Difference]: With dead ends: 21680 [2022-11-23 15:03:05,024 INFO L226 Difference]: Without dead ends: 12199 [2022-11-23 15:03:05,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:03:05,059 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 1010 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 2544 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 1677 SdHoareTripleChecker+Invalid, 2956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 2544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:05,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1086 Valid, 1677 Invalid, 2956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 2544 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-23 15:03:05,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12199 states. [2022-11-23 15:03:06,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12199 to 11221. [2022-11-23 15:03:06,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11221 states, 7669 states have (on average 1.5217107836745338) internal successors, (11670), 8100 states have internal predecessors, (11670), 2820 states have call successors, (2820), 540 states have call predecessors, (2820), 731 states have return successors, (3556), 2811 states have call predecessors, (3556), 2815 states have call successors, (3556) [2022-11-23 15:03:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11221 states to 11221 states and 18046 transitions. [2022-11-23 15:03:06,112 INFO L78 Accepts]: Start accepts. Automaton has 11221 states and 18046 transitions. Word has length 102 [2022-11-23 15:03:06,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:06,113 INFO L495 AbstractCegarLoop]: Abstraction has 11221 states and 18046 transitions. [2022-11-23 15:03:06,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-23 15:03:06,113 INFO L276 IsEmpty]: Start isEmpty. Operand 11221 states and 18046 transitions. [2022-11-23 15:03:06,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-23 15:03:06,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:06,117 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:06,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 15:03:06,117 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:06,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:06,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1759072557, now seen corresponding path program 1 times [2022-11-23 15:03:06,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:06,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387927524] [2022-11-23 15:03:06,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:06,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:03:06,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:06,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387927524] [2022-11-23 15:03:06,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387927524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:06,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:03:06,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:03:06,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174275464] [2022-11-23 15:03:06,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:06,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:03:06,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:06,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:03:06,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:03:06,302 INFO L87 Difference]: Start difference. First operand 11221 states and 18046 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-23 15:03:07,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:07,381 INFO L93 Difference]: Finished difference Result 22328 states and 36901 transitions. [2022-11-23 15:03:07,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:03:07,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 107 [2022-11-23 15:03:07,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:07,452 INFO L225 Difference]: With dead ends: 22328 [2022-11-23 15:03:07,452 INFO L226 Difference]: Without dead ends: 12301 [2022-11-23 15:03:07,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:03:07,500 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 216 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:07,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 1540 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:03:07,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12301 states. [2022-11-23 15:03:08,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12301 to 12301. [2022-11-23 15:03:08,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12301 states, 8705 states have (on average 1.5332567489948306) internal successors, (13347), 9180 states have internal predecessors, (13347), 2820 states have call successors, (2820), 540 states have call predecessors, (2820), 775 states have return successors, (3736), 2811 states have call predecessors, (3736), 2815 states have call successors, (3736) [2022-11-23 15:03:08,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12301 states to 12301 states and 19903 transitions. [2022-11-23 15:03:08,732 INFO L78 Accepts]: Start accepts. Automaton has 12301 states and 19903 transitions. Word has length 107 [2022-11-23 15:03:08,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:08,732 INFO L495 AbstractCegarLoop]: Abstraction has 12301 states and 19903 transitions. [2022-11-23 15:03:08,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-23 15:03:08,733 INFO L276 IsEmpty]: Start isEmpty. Operand 12301 states and 19903 transitions. [2022-11-23 15:03:08,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-23 15:03:08,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:08,737 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:08,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 15:03:08,738 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:08,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:08,738 INFO L85 PathProgramCache]: Analyzing trace with hash 132916053, now seen corresponding path program 1 times [2022-11-23 15:03:08,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:08,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745613378] [2022-11-23 15:03:08,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:08,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:03:09,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:09,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745613378] [2022-11-23 15:03:09,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745613378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:09,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:03:09,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:03:09,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76853029] [2022-11-23 15:03:09,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:09,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:03:09,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:09,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:03:09,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:03:09,085 INFO L87 Difference]: Start difference. First operand 12301 states and 19903 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 15:03:10,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:10,765 INFO L93 Difference]: Finished difference Result 12427 states and 20112 transitions. [2022-11-23 15:03:10,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:03:10,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 107 [2022-11-23 15:03:10,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:10,865 INFO L225 Difference]: With dead ends: 12427 [2022-11-23 15:03:10,865 INFO L226 Difference]: Without dead ends: 12412 [2022-11-23 15:03:10,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:03:10,878 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 669 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:10,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 1872 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:03:10,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12412 states. [2022-11-23 15:03:11,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12412 to 12309. [2022-11-23 15:03:11,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12309 states, 8713 states have (on average 1.5327671295764949) internal successors, (13355), 9188 states have internal predecessors, (13355), 2820 states have call successors, (2820), 540 states have call predecessors, (2820), 775 states have return successors, (3736), 2811 states have call predecessors, (3736), 2815 states have call successors, (3736) [2022-11-23 15:03:12,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12309 states to 12309 states and 19911 transitions. [2022-11-23 15:03:12,024 INFO L78 Accepts]: Start accepts. Automaton has 12309 states and 19911 transitions. Word has length 107 [2022-11-23 15:03:12,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:12,024 INFO L495 AbstractCegarLoop]: Abstraction has 12309 states and 19911 transitions. [2022-11-23 15:03:12,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 15:03:12,025 INFO L276 IsEmpty]: Start isEmpty. Operand 12309 states and 19911 transitions. [2022-11-23 15:03:12,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-23 15:03:12,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:12,029 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:12,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 15:03:12,029 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:12,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:12,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1723177279, now seen corresponding path program 1 times [2022-11-23 15:03:12,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:12,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546847510] [2022-11-23 15:03:12,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:12,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:03:12,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:12,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546847510] [2022-11-23 15:03:12,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546847510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:12,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:03:12,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-23 15:03:12,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339948968] [2022-11-23 15:03:12,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:12,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 15:03:12,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:12,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 15:03:12,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:03:12,645 INFO L87 Difference]: Start difference. First operand 12309 states and 19911 transitions. Second operand has 13 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-23 15:03:18,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:18,954 INFO L93 Difference]: Finished difference Result 13497 states and 21721 transitions. [2022-11-23 15:03:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-23 15:03:18,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) Word has length 111 [2022-11-23 15:03:18,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:19,159 INFO L225 Difference]: With dead ends: 13497 [2022-11-23 15:03:19,160 INFO L226 Difference]: Without dead ends: 13480 [2022-11-23 15:03:19,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-11-23 15:03:19,171 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 2747 mSDsluCounter, 3399 mSDsCounter, 0 mSdLazyCounter, 7937 mSolverCounterSat, 1555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2773 SdHoareTripleChecker+Valid, 3955 SdHoareTripleChecker+Invalid, 9492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1555 IncrementalHoareTripleChecker+Valid, 7937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:19,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2773 Valid, 3955 Invalid, 9492 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1555 Valid, 7937 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-23 15:03:19,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13480 states. [2022-11-23 15:03:20,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13480 to 12949. [2022-11-23 15:03:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12949 states, 9208 states have (on average 1.538010425716768) internal successors, (14162), 9679 states have internal predecessors, (14162), 2861 states have call successors, (2861), 645 states have call predecessors, (2861), 879 states have return successors, (3788), 2855 states have call predecessors, (3788), 2856 states have call successors, (3788) [2022-11-23 15:03:20,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12949 states to 12949 states and 20811 transitions. [2022-11-23 15:03:20,521 INFO L78 Accepts]: Start accepts. Automaton has 12949 states and 20811 transitions. Word has length 111 [2022-11-23 15:03:20,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:20,521 INFO L495 AbstractCegarLoop]: Abstraction has 12949 states and 20811 transitions. [2022-11-23 15:03:20,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-23 15:03:20,522 INFO L276 IsEmpty]: Start isEmpty. Operand 12949 states and 20811 transitions. [2022-11-23 15:03:20,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-23 15:03:20,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:20,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:20,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 15:03:20,527 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:20,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:20,528 INFO L85 PathProgramCache]: Analyzing trace with hash -751901275, now seen corresponding path program 1 times [2022-11-23 15:03:20,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:20,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525644454] [2022-11-23 15:03:20,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:20,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:03:21,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:21,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525644454] [2022-11-23 15:03:21,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525644454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:21,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:03:21,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-23 15:03:21,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493925356] [2022-11-23 15:03:21,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:21,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:03:21,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:21,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:03:21,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:03:21,367 INFO L87 Difference]: Start difference. First operand 12949 states and 20811 transitions. Second operand has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 7 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-11-23 15:03:26,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:26,841 INFO L93 Difference]: Finished difference Result 36610 states and 59528 transitions. [2022-11-23 15:03:26,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:03:26,843 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 7 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 118 [2022-11-23 15:03:26,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:26,961 INFO L225 Difference]: With dead ends: 36610 [2022-11-23 15:03:26,962 INFO L226 Difference]: Without dead ends: 23688 [2022-11-23 15:03:27,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:03:27,014 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 2607 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 3218 mSolverCounterSat, 1055 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2677 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 4273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1055 IncrementalHoareTripleChecker+Valid, 3218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:27,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2677 Valid, 1934 Invalid, 4273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1055 Valid, 3218 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-23 15:03:27,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23688 states. [2022-11-23 15:03:28,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23688 to 21017. [2022-11-23 15:03:28,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21017 states, 14812 states have (on average 1.5465163381042397) internal successors, (22907), 15721 states have internal predecessors, (22907), 4804 states have call successors, (4804), 1006 states have call predecessors, (4804), 1400 states have return successors, (6406), 4632 states have call predecessors, (6406), 4799 states have call successors, (6406) [2022-11-23 15:03:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21017 states to 21017 states and 34117 transitions. [2022-11-23 15:03:28,966 INFO L78 Accepts]: Start accepts. Automaton has 21017 states and 34117 transitions. Word has length 118 [2022-11-23 15:03:28,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:28,966 INFO L495 AbstractCegarLoop]: Abstraction has 21017 states and 34117 transitions. [2022-11-23 15:03:28,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 7 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-11-23 15:03:28,966 INFO L276 IsEmpty]: Start isEmpty. Operand 21017 states and 34117 transitions. [2022-11-23 15:03:28,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-23 15:03:28,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:28,971 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:28,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 15:03:28,971 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:28,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:28,972 INFO L85 PathProgramCache]: Analyzing trace with hash 670698030, now seen corresponding path program 1 times [2022-11-23 15:03:28,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:28,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557209602] [2022-11-23 15:03:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:28,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:03:31,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:31,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557209602] [2022-11-23 15:03:31,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557209602] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:03:31,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620656761] [2022-11-23 15:03:31,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:31,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:03:31,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:03:31,678 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:03:31,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5f3ce7c-c2b2-489d-bf29-cdfaad1cc789/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:03:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:32,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 2114 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 15:03:32,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:03:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:03:35,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:03:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:03:38,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620656761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:03:38,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [587525127] [2022-11-23 15:03:38,900 INFO L159 IcfgInterpreter]: Started Sifa with 112 locations of interest [2022-11-23 15:03:38,900 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:03:38,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:03:38,910 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:03:38,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:03:46,508 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 592 for LOIs [2022-11-23 15:04:57,987 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 592 for LOIs [2022-11-23 15:05:35,662 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 443 for LOIs [2022-11-23 15:05:35,733 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__twothirdsfull with input of size 577 for LOIs [2022-11-23 15:05:41,315 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 107 for LOIs [2022-11-23 15:05:41,390 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 76 for LOIs [2022-11-23 15:05:41,407 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 68 for LOIs [2022-11-23 15:05:41,422 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 468 for LOIs [2022-11-23 15:05:41,757 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 597 for LOIs [2022-11-23 15:05:45,480 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 476 for LOIs [2022-11-23 15:05:45,763 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 106 for LOIs [2022-11-23 15:05:46,124 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 101 for LOIs [2022-11-23 15:05:46,135 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 560 for LOIs [2022-11-23 15:05:48,930 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 837 for LOIs [2022-11-23 15:09:41,465 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 664 for LOIs [2022-11-23 15:09:42,054 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:10:02,273 WARN L233 SmtUtils]: Spent 11.22s on a formula simplification. DAG size of input: 664 DAG size of output: 525 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:10:14,670 WARN L233 SmtUtils]: Spent 11.80s on a formula simplification. DAG size of input: 704 DAG size of output: 539 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:10:23,677 WARN L233 SmtUtils]: Spent 8.51s on a formula simplification. DAG size of input: 679 DAG size of output: 617 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:10:32,480 WARN L233 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 679 DAG size of output: 617 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:10:54,727 WARN L233 SmtUtils]: Spent 21.47s on a formula simplification. DAG size of input: 837 DAG size of output: 688 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:11:32,795 WARN L233 SmtUtils]: Spent 30.52s on a formula simplification. DAG size of input: 1178 DAG size of output: 686 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:12:12,046 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 634 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:12:18,764 WARN L233 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 634 DAG size of output: 605 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:12:30,382 WARN L233 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 590 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:13:03,344 WARN L233 SmtUtils]: Spent 12.16s on a formula simplification. DAG size of input: 561 DAG size of output: 500 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:13:13,567 WARN L233 SmtUtils]: Spent 8.57s on a formula simplification. DAG size of input: 468 DAG size of output: 448 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:13:22,905 WARN L233 SmtUtils]: Spent 8.59s on a formula simplification. DAG size of input: 472 DAG size of output: 452 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:13:36,321 WARN L233 SmtUtils]: Spent 12.51s on a formula simplification. DAG size of input: 563 DAG size of output: 511 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:13:48,923 WARN L233 SmtUtils]: Spent 11.70s on a formula simplification. DAG size of input: 568 DAG size of output: 512 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:14:01,569 WARN L233 SmtUtils]: Spent 11.71s on a formula simplification. DAG size of input: 570 DAG size of output: 514 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:14:14,559 WARN L233 SmtUtils]: Spent 12.02s on a formula simplification. DAG size of input: 572 DAG size of output: 516 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:14:27,497 WARN L233 SmtUtils]: Spent 11.93s on a formula simplification. DAG size of input: 574 DAG size of output: 518 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:14:35,070 WARN L233 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 576 DAG size of output: 513 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:14:42,707 WARN L233 SmtUtils]: Spent 6.57s on a formula simplification. DAG size of input: 578 DAG size of output: 515 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:14:49,740 WARN L233 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 552 DAG size of output: 489 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:14:56,405 WARN L233 SmtUtils]: Spent 5.80s on a formula simplification. DAG size of input: 554 DAG size of output: 491 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:15:03,247 WARN L233 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 557 DAG size of output: 494 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:15:10,083 WARN L233 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 476 DAG size of output: 454 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:15:15,953 WARN L233 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 480 DAG size of output: 458 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:15:24,435 WARN L233 SmtUtils]: Spent 7.47s on a formula simplification. DAG size of input: 566 DAG size of output: 512 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:15:31,927 WARN L233 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 566 DAG size of output: 498 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:15:39,837 WARN L233 SmtUtils]: Spent 6.91s on a formula simplification. DAG size of input: 569 DAG size of output: 500 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:15:46,747 WARN L233 SmtUtils]: Spent 5.85s on a formula simplification. DAG size of input: 572 DAG size of output: 502 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:15:53,644 WARN L233 SmtUtils]: Spent 5.85s on a formula simplification. DAG size of input: 578 DAG size of output: 508 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:16:00,601 WARN L233 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 594 DAG size of output: 518 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:16:00,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [587525127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:16:00,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:16:00,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [22, 12, 12] total 106 [2022-11-23 15:16:00,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791229567] [2022-11-23 15:16:00,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:16:00,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-23 15:16:00,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:16:00,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-23 15:16:00,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=10387, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 15:16:00,616 INFO L87 Difference]: Start difference. First operand 21017 states and 34117 transitions. Second operand has 69 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 44 states have internal predecessors, (73), 18 states have call successors, (22), 15 states have call predecessors, (22), 14 states have return successors, (21), 18 states have call predecessors, (21), 18 states have call successors, (21)