./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0492800-3df5-49d0-bab2-4e04b3c71a4d/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0492800-3df5-49d0-bab2-4e04b3c71a4d/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0492800-3df5-49d0-bab2-4e04b3c71a4d/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0492800-3df5-49d0-bab2-4e04b3c71a4d/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0492800-3df5-49d0-bab2-4e04b3c71a4d/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0492800-3df5-49d0-bab2-4e04b3c71a4d/bin/utaipan-G1rejxKTta --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 d84130cab59568fb669543ac086f4847eedfc87145b3c30d32e19c1d0d03b42f --- 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-dbf71c6-m [2022-10-17 17:36:37,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:36:37,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:36:37,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:36:37,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:36:37,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:36:38,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:36:38,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:36:38,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:36:38,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:36:38,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:36:38,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:36:38,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:36:38,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:36:38,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:36:38,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:36:38,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:36:38,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:36:38,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:36:38,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:36:38,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:36:38,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:36:38,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:36:38,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:36:38,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:36:38,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:36:38,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:36:38,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:36:38,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:36:38,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:36:38,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:36:38,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:36:38,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:36:38,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:36:38,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:36:38,069 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:36:38,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:36:38,070 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:36:38,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:36:38,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:36:38,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:36:38,073 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0492800-3df5-49d0-bab2-4e04b3c71a4d/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:36:38,131 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:36:38,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:36:38,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:36:38,132 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:36:38,133 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:36:38,133 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:36:38,133 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:36:38,134 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:36:38,134 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:36:38,134 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:36:38,135 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:36:38,136 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:36:38,136 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:36:38,136 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:36:38,136 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:36:38,137 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:36:38,137 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:36:38,137 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:36:38,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:36:38,138 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:36:38,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:36:38,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:36:38,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:36:38,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:36:38,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:36:38,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:36:38,147 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:36:38,147 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:36:38,148 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:36:38,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:36:38,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:36:38,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:36:38,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:36:38,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:36:38,149 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:36:38,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:36:38,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:36:38,150 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:36:38,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:36:38,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:36:38,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:36:38,153 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_b0492800-3df5-49d0-bab2-4e04b3c71a4d/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0492800-3df5-49d0-bab2-4e04b3c71a4d/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d84130cab59568fb669543ac086f4847eedfc87145b3c30d32e19c1d0d03b42f [2022-10-17 17:36:38,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:36:38,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:36:38,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:36:38,453 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:36:38,454 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:36:38,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0492800-3df5-49d0-bab2-4e04b3c71a4d/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c [2022-10-17 17:36:38,534 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0492800-3df5-49d0-bab2-4e04b3c71a4d/bin/utaipan-G1rejxKTta/data/e88b22354/8e562c268baa441b9848c3df372ddda4/FLAG514c66a2e [2022-10-17 17:36:39,160 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:36:39,161 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0492800-3df5-49d0-bab2-4e04b3c71a4d/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c [2022-10-17 17:36:39,189 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0492800-3df5-49d0-bab2-4e04b3c71a4d/bin/utaipan-G1rejxKTta/data/e88b22354/8e562c268baa441b9848c3df372ddda4/FLAG514c66a2e [2022-10-17 17:36:39,360 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0492800-3df5-49d0-bab2-4e04b3c71a4d/bin/utaipan-G1rejxKTta/data/e88b22354/8e562c268baa441b9848c3df372ddda4 [2022-10-17 17:36:39,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:36:39,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:36:39,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:36:39,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:36:39,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:36:39,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:36:39" (1/1) ... [2022-10-17 17:36:39,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d1d4fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:39, skipping insertion in model container [2022-10-17 17:36:39,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:36:39" (1/1) ... [2022-10-17 17:36:39,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:36:39,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:36:40,061 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0492800-3df5-49d0-bab2-4e04b3c71a4d/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c[61393,61406] [2022-10-17 17:36:40,125 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:36:40,142 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:36:40,284 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0492800-3df5-49d0-bab2-4e04b3c71a4d/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c[61393,61406] [2022-10-17 17:36:40,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:36:40,365 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:36:40,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:40 WrapperNode [2022-10-17 17:36:40,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:36:40,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:36:40,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:36:40,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:36:40,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:40" (1/1) ... [2022-10-17 17:36:40,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:40" (1/1) ... [2022-10-17 17:36:40,492 INFO L138 Inliner]: procedures = 93, calls = 346, calls flagged for inlining = 30, calls inlined = 26, statements flattened = 883 [2022-10-17 17:36:40,493 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:36:40,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:36:40,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:36:40,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:36:40,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:40" (1/1) ... [2022-10-17 17:36:40,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:40" (1/1) ... [2022-10-17 17:36:40,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:40" (1/1) ... [2022-10-17 17:36:40,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:40" (1/1) ... [2022-10-17 17:36:40,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:40" (1/1) ... [2022-10-17 17:36:40,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:40" (1/1) ... [2022-10-17 17:36:40,637 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:40" (1/1) ... [2022-10-17 17:36:40,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:40" (1/1) ... [2022-10-17 17:36:40,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:36:40,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:36:40,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:36:40,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:36:40,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:40" (1/1) ... [2022-10-17 17:36:40,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:36:40,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0492800-3df5-49d0-bab2-4e04b3c71a4d/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:40,731 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0492800-3df5-49d0-bab2-4e04b3c71a4d/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:36:40,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0492800-3df5-49d0-bab2-4e04b3c71a4d/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:36:40,787 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-10-17 17:36:40,787 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-10-17 17:36:40,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:36:40,788 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-10-17 17:36:40,788 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-10-17 17:36:40,788 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-10-17 17:36:40,788 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-10-17 17:36:40,788 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2022-10-17 17:36:40,789 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2022-10-17 17:36:40,789 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-10-17 17:36:40,789 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-10-17 17:36:40,789 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-10-17 17:36:40,789 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-10-17 17:36:40,790 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-10-17 17:36:40,790 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-10-17 17:36:40,790 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-10-17 17:36:40,790 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-10-17 17:36:40,790 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-10-17 17:36:40,790 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-10-17 17:36:40,791 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-10-17 17:36:40,791 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-10-17 17:36:40,791 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-10-17 17:36:40,791 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-10-17 17:36:40,791 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-10-17 17:36:40,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-10-17 17:36:40,792 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-10-17 17:36:40,792 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-10-17 17:36:40,792 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-10-17 17:36:40,793 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-10-17 17:36:40,793 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-10-17 17:36:40,794 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-10-17 17:36:40,795 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-10-17 17:36:40,795 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-10-17 17:36:40,795 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-10-17 17:36:40,795 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-10-17 17:36:40,795 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-10-17 17:36:40,795 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-10-17 17:36:40,796 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-10-17 17:36:40,796 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-10-17 17:36:40,796 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-10-17 17:36:40,796 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-10-17 17:36:40,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:36:40,797 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-10-17 17:36:40,797 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-10-17 17:36:40,797 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-10-17 17:36:40,798 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-10-17 17:36:40,799 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-10-17 17:36:40,799 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-10-17 17:36:40,800 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-10-17 17:36:40,801 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-10-17 17:36:40,801 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-10-17 17:36:40,801 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-10-17 17:36:40,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:36:40,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:36:40,802 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-10-17 17:36:40,802 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-10-17 17:36:41,048 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:36:41,054 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:36:42,389 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:36:43,273 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:36:43,273 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-17 17:36:43,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:36:43 BoogieIcfgContainer [2022-10-17 17:36:43,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:36:43,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:36:43,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:36:43,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:36:43,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:36:39" (1/3) ... [2022-10-17 17:36:43,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f27989b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:36:43, skipping insertion in model container [2022-10-17 17:36:43,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:40" (2/3) ... [2022-10-17 17:36:43,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f27989b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:36:43, skipping insertion in model container [2022-10-17 17:36:43,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:36:43" (3/3) ... [2022-10-17 17:36:43,287 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product30.cil.c [2022-10-17 17:36:43,306 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:36:43,306 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:36:43,369 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:36:43,376 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;@1857dc9e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:36:43,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:36:43,387 INFO L276 IsEmpty]: Start isEmpty. Operand has 416 states, 286 states have (on average 1.597902097902098) internal successors, (457), 306 states have internal predecessors, (457), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2022-10-17 17:36:43,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-10-17 17:36:43,423 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:43,424 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:43,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:43,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1644822208, now seen corresponding path program 1 times [2022-10-17 17:36:43,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:43,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708463403] [2022-10-17 17:36:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:43,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 17:36:44,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:44,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708463403] [2022-10-17 17:36:44,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708463403] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:44,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:44,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:36:44,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056060363] [2022-10-17 17:36:44,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:44,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:36:44,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:44,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:36:44,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:36:44,585 INFO L87 Difference]: Start difference. First operand has 416 states, 286 states have (on average 1.597902097902098) internal successors, (457), 306 states have internal predecessors, (457), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-10-17 17:36:48,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:48,279 INFO L93 Difference]: Finished difference Result 1726 states and 2836 transitions. [2022-10-17 17:36:48,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:36:48,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2022-10-17 17:36:48,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:48,326 INFO L225 Difference]: With dead ends: 1726 [2022-10-17 17:36:48,328 INFO L226 Difference]: Without dead ends: 1311 [2022-10-17 17:36:48,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:36:48,346 INFO L413 NwaCegarLoop]: 1219 mSDtfsCounter, 1501 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1646 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:48,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1646 Valid, 1910 Invalid, 2267 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [206 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-10-17 17:36:48,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2022-10-17 17:36:48,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1198. [2022-10-17 17:36:48,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 868 states have (on average 1.596774193548387) internal successors, (1386), 903 states have internal predecessors, (1386), 268 states have call successors, (268), 62 states have call predecessors, (268), 61 states have return successors, (286), 247 states have call predecessors, (286), 264 states have call successors, (286) [2022-10-17 17:36:48,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1940 transitions. [2022-10-17 17:36:48,634 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1940 transitions. Word has length 70 [2022-10-17 17:36:48,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:48,640 INFO L495 AbstractCegarLoop]: Abstraction has 1198 states and 1940 transitions. [2022-10-17 17:36:48,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-10-17 17:36:48,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1940 transitions. [2022-10-17 17:36:48,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-10-17 17:36:48,655 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:48,655 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:48,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:36:48,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:48,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:48,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1045130378, now seen corresponding path program 1 times [2022-10-17 17:36:48,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:48,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755723745] [2022-10-17 17:36:48,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:48,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:36:49,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:49,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755723745] [2022-10-17 17:36:49,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755723745] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:49,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:49,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 17:36:49,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017719133] [2022-10-17 17:36:49,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:49,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:36:49,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:49,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:36:49,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:36:49,390 INFO L87 Difference]: Start difference. First operand 1198 states and 1940 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-10-17 17:36:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:53,439 INFO L93 Difference]: Finished difference Result 4347 states and 7097 transitions. [2022-10-17 17:36:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-17 17:36:53,440 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 88 [2022-10-17 17:36:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:53,478 INFO L225 Difference]: With dead ends: 4347 [2022-10-17 17:36:53,479 INFO L226 Difference]: Without dead ends: 3165 [2022-10-17 17:36:53,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-10-17 17:36:53,498 INFO L413 NwaCegarLoop]: 943 mSDtfsCounter, 1850 mSDsluCounter, 2492 mSDsCounter, 0 mSdLazyCounter, 4555 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1934 SdHoareTripleChecker+Valid, 3261 SdHoareTripleChecker+Invalid, 5179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 4555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:53,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1934 Valid, 3261 Invalid, 5179 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [624 Valid, 4555 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-10-17 17:36:53,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2022-10-17 17:36:53,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 2849. [2022-10-17 17:36:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2090 states have (on average 1.6004784688995215) internal successors, (3345), 2152 states have internal predecessors, (3345), 602 states have call successors, (602), 137 states have call predecessors, (602), 156 states have return successors, (699), 585 states have call predecessors, (699), 596 states have call successors, (699) [2022-10-17 17:36:53,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 4646 transitions. [2022-10-17 17:36:53,843 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 4646 transitions. Word has length 88 [2022-10-17 17:36:53,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:53,844 INFO L495 AbstractCegarLoop]: Abstraction has 2849 states and 4646 transitions. [2022-10-17 17:36:53,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-10-17 17:36:53,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 4646 transitions. [2022-10-17 17:36:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-10-17 17:36:53,851 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:53,851 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:53,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:36:53,852 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:53,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:53,852 INFO L85 PathProgramCache]: Analyzing trace with hash -413151591, now seen corresponding path program 1 times [2022-10-17 17:36:53,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:53,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449901587] [2022-10-17 17:36:53,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:53,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:36:54,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:54,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449901587] [2022-10-17 17:36:54,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449901587] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:54,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:54,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:36:54,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473165371] [2022-10-17 17:36:54,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:54,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:36:54,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:54,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:36:54,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:36:54,296 INFO L87 Difference]: Start difference. First operand 2849 states and 4646 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-10-17 17:36:54,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:54,810 INFO L93 Difference]: Finished difference Result 6336 states and 10351 transitions. [2022-10-17 17:36:54,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:36:54,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 91 [2022-10-17 17:36:54,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:54,847 INFO L225 Difference]: With dead ends: 6336 [2022-10-17 17:36:54,847 INFO L226 Difference]: Without dead ends: 3502 [2022-10-17 17:36:54,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:36:54,881 INFO L413 NwaCegarLoop]: 784 mSDtfsCounter, 494 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 1940 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:54,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 1940 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:36:54,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2022-10-17 17:36:55,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 3389. [2022-10-17 17:36:55,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3389 states, 2491 states have (on average 1.583701324769169) internal successors, (3945), 2548 states have internal predecessors, (3945), 708 states have call successors, (708), 166 states have call predecessors, (708), 189 states have return successors, (838), 698 states have call predecessors, (838), 700 states have call successors, (838) [2022-10-17 17:36:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3389 states to 3389 states and 5491 transitions. [2022-10-17 17:36:55,258 INFO L78 Accepts]: Start accepts. Automaton has 3389 states and 5491 transitions. Word has length 91 [2022-10-17 17:36:55,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:55,259 INFO L495 AbstractCegarLoop]: Abstraction has 3389 states and 5491 transitions. [2022-10-17 17:36:55,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-10-17 17:36:55,260 INFO L276 IsEmpty]: Start isEmpty. Operand 3389 states and 5491 transitions. [2022-10-17 17:36:55,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-10-17 17:36:55,265 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:55,265 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:55,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:36:55,266 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:55,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:55,266 INFO L85 PathProgramCache]: Analyzing trace with hash -2116550772, now seen corresponding path program 1 times [2022-10-17 17:36:55,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:55,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451930257] [2022-10-17 17:36:55,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:55,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:55,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:36:55,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:55,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451930257] [2022-10-17 17:36:55,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451930257] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:55,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:55,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:36:55,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402086391] [2022-10-17 17:36:55,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:55,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:36:55,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:55,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:36:55,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:36:55,663 INFO L87 Difference]: Start difference. First operand 3389 states and 5491 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:36:56,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:56,112 INFO L93 Difference]: Finished difference Result 5701 states and 9283 transitions. [2022-10-17 17:36:56,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:36:56,113 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 92 [2022-10-17 17:36:56,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:56,156 INFO L225 Difference]: With dead ends: 5701 [2022-10-17 17:36:56,156 INFO L226 Difference]: Without dead ends: 3494 [2022-10-17 17:36:56,180 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 [2022-10-17 17:36:56,185 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 7 mSDsluCounter, 3188 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3620 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:56,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3620 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:36:56,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3494 states. [2022-10-17 17:36:56,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3494 to 3452. [2022-10-17 17:36:56,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 2536 states have (on average 1.5733438485804416) internal successors, (3990), 2593 states have internal predecessors, (3990), 708 states have call successors, (708), 166 states have call predecessors, (708), 207 states have return successors, (883), 716 states have call predecessors, (883), 700 states have call successors, (883) [2022-10-17 17:36:56,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 5581 transitions. [2022-10-17 17:36:56,531 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 5581 transitions. Word has length 92 [2022-10-17 17:36:56,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:56,531 INFO L495 AbstractCegarLoop]: Abstraction has 3452 states and 5581 transitions. [2022-10-17 17:36:56,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:36:56,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 5581 transitions. [2022-10-17 17:36:56,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-10-17 17:36:56,542 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:56,542 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:56,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:36:56,543 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:56,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:56,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1612639557, now seen corresponding path program 1 times [2022-10-17 17:36:56,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:56,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318439396] [2022-10-17 17:36:56,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:56,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:36:56,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:56,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318439396] [2022-10-17 17:36:56,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318439396] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:56,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:56,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:36:56,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139039056] [2022-10-17 17:36:56,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:56,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:36:56,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:56,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:36:56,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:36:56,941 INFO L87 Difference]: Start difference. First operand 3452 states and 5581 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:36:57,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:57,457 INFO L93 Difference]: Finished difference Result 5788 states and 9397 transitions. [2022-10-17 17:36:57,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:36:57,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 93 [2022-10-17 17:36:57,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:57,498 INFO L225 Difference]: With dead ends: 5788 [2022-10-17 17:36:57,498 INFO L226 Difference]: Without dead ends: 3539 [2022-10-17 17:36:57,522 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 [2022-10-17 17:36:57,525 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 6 mSDsluCounter, 3207 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3644 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:57,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3644 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:36:57,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3539 states. [2022-10-17 17:36:57,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3539 to 3461. [2022-10-17 17:36:57,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3461 states, 2545 states have (on average 1.5713163064833007) internal successors, (3999), 2593 states have internal predecessors, (3999), 708 states have call successors, (708), 166 states have call predecessors, (708), 207 states have return successors, (883), 725 states have call predecessors, (883), 700 states have call successors, (883) [2022-10-17 17:36:57,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3461 states to 3461 states and 5590 transitions. [2022-10-17 17:36:57,828 INFO L78 Accepts]: Start accepts. Automaton has 3461 states and 5590 transitions. Word has length 93 [2022-10-17 17:36:57,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:57,830 INFO L495 AbstractCegarLoop]: Abstraction has 3461 states and 5590 transitions. [2022-10-17 17:36:57,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:36:57,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3461 states and 5590 transitions. [2022-10-17 17:36:57,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-10-17 17:36:57,835 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:57,835 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:57,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:36:57,836 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:57,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:57,836 INFO L85 PathProgramCache]: Analyzing trace with hash 749583205, now seen corresponding path program 1 times [2022-10-17 17:36:57,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:57,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930532244] [2022-10-17 17:36:57,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:57,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:36:58,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:58,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930532244] [2022-10-17 17:36:58,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930532244] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:58,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:58,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:36:58,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583513776] [2022-10-17 17:36:58,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:58,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:36:58,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:58,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:36:58,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:36:58,216 INFO L87 Difference]: Start difference. First operand 3461 states and 5590 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:36:58,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:58,623 INFO L93 Difference]: Finished difference Result 5803 states and 9412 transitions. [2022-10-17 17:36:58,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:36:58,624 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 93 [2022-10-17 17:36:58,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:58,661 INFO L225 Difference]: With dead ends: 5803 [2022-10-17 17:36:58,661 INFO L226 Difference]: Without dead ends: 3548 [2022-10-17 17:36:58,684 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 [2022-10-17 17:36:58,686 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 6 mSDsluCounter, 3207 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3644 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:58,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3644 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:36:58,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2022-10-17 17:36:58,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 3470. [2022-10-17 17:36:59,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3470 states, 2554 states have (on average 1.5693030540328896) internal successors, (4008), 2593 states have internal predecessors, (4008), 708 states have call successors, (708), 166 states have call predecessors, (708), 207 states have return successors, (883), 734 states have call predecessors, (883), 700 states have call successors, (883) [2022-10-17 17:36:59,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 5599 transitions. [2022-10-17 17:36:59,046 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 5599 transitions. Word has length 93 [2022-10-17 17:36:59,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:59,047 INFO L495 AbstractCegarLoop]: Abstraction has 3470 states and 5599 transitions. [2022-10-17 17:36:59,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:36:59,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 5599 transitions. [2022-10-17 17:36:59,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-10-17 17:36:59,053 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:59,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:59,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:36:59,054 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:59,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:59,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1675750509, now seen corresponding path program 1 times [2022-10-17 17:36:59,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:59,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619725651] [2022-10-17 17:36:59,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:59,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:36:59,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:59,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619725651] [2022-10-17 17:36:59,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619725651] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:59,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:59,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:36:59,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792536347] [2022-10-17 17:36:59,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:59,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:36:59,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:59,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:36:59,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:36:59,436 INFO L87 Difference]: Start difference. First operand 3470 states and 5599 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-10-17 17:37:02,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:02,624 INFO L93 Difference]: Finished difference Result 8813 states and 14450 transitions. [2022-10-17 17:37:02,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:37:02,626 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) Word has length 97 [2022-10-17 17:37:02,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:02,711 INFO L225 Difference]: With dead ends: 8813 [2022-10-17 17:37:02,712 INFO L226 Difference]: Without dead ends: 6189 [2022-10-17 17:37:02,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:37:02,743 INFO L413 NwaCegarLoop]: 1186 mSDtfsCounter, 2887 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 2150 mSolverCounterSat, 966 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3078 SdHoareTripleChecker+Valid, 2214 SdHoareTripleChecker+Invalid, 3116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 966 IncrementalHoareTripleChecker+Valid, 2150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:02,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3078 Valid, 2214 Invalid, 3116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [966 Valid, 2150 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-10-17 17:37:02,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6189 states. [2022-10-17 17:37:03,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6189 to 5363. [2022-10-17 17:37:03,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5363 states, 3898 states have (on average 1.5330938943047716) internal successors, (5976), 3968 states have internal predecessors, (5976), 1123 states have call successors, (1123), 279 states have call predecessors, (1123), 341 states have return successors, (1432), 1151 states have call predecessors, (1432), 1111 states have call successors, (1432) [2022-10-17 17:37:03,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5363 states to 5363 states and 8531 transitions. [2022-10-17 17:37:03,310 INFO L78 Accepts]: Start accepts. Automaton has 5363 states and 8531 transitions. Word has length 97 [2022-10-17 17:37:03,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:03,310 INFO L495 AbstractCegarLoop]: Abstraction has 5363 states and 8531 transitions. [2022-10-17 17:37:03,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-10-17 17:37:03,311 INFO L276 IsEmpty]: Start isEmpty. Operand 5363 states and 8531 transitions. [2022-10-17 17:37:03,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-10-17 17:37:03,315 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:03,315 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:03,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:37:03,316 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:03,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:03,316 INFO L85 PathProgramCache]: Analyzing trace with hash 81834200, now seen corresponding path program 1 times [2022-10-17 17:37:03,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:03,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300269934] [2022-10-17 17:37:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:03,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:03,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:37:03,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:03,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300269934] [2022-10-17 17:37:03,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300269934] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:03,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:03,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:37:03,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565130532] [2022-10-17 17:37:03,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:03,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:37:03,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:03,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:37:03,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:37:03,644 INFO L87 Difference]: Start difference. First operand 5363 states and 8531 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15)