./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9 --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 b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 --- 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-6b4ec56 [2022-11-20 20:08:39,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:08:39,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:08:39,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:08:39,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:08:39,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:08:39,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:08:39,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:08:39,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:08:39,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:08:39,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:08:39,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:08:39,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:08:39,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:08:39,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:08:39,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:08:39,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:08:39,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:08:39,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:08:39,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:08:39,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:08:39,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:08:39,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:08:39,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:08:39,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:08:39,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:08:39,343 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:08:39,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:08:39,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:08:39,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:08:39,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:08:39,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:08:39,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:08:39,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:08:39,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:08:39,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:08:39,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:08:39,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:08:39,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:08:39,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:08:39,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:08:39,358 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:08:39,397 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:08:39,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:08:39,398 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:08:39,398 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:08:39,399 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:08:39,399 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:08:39,399 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:08:39,400 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:08:39,400 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:08:39,400 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:08:39,401 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:08:39,401 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:08:39,402 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:08:39,402 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:08:39,402 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:08:39,402 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:08:39,402 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:08:39,403 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:08:39,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:08:39,404 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:08:39,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:08:39,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:08:39,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:08:39,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:08:39,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:08:39,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:08:39,405 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:08:39,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:08:39,405 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:08:39,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:08:39,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:08:39,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:08:39,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:08:39,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:08:39,407 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:08:39,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:08:39,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:08:39,407 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:08:39,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:08:39,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:08:39,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:08:39,408 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_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 [2022-11-20 20:08:39,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:08:39,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:08:39,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:08:39,682 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:08:39,682 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:08:39,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2022-11-20 20:08:42,768 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:08:43,125 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:08:43,137 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2022-11-20 20:08:43,160 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/data/ef6863933/2111387bc0174b5693e30c44d4e7b839/FLAG6ec00b70a [2022-11-20 20:08:43,174 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/data/ef6863933/2111387bc0174b5693e30c44d4e7b839 [2022-11-20 20:08:43,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:08:43,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:08:43,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:08:43,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:08:43,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:08:43,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:08:43" (1/1) ... [2022-11-20 20:08:43,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc718e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:08:43, skipping insertion in model container [2022-11-20 20:08:43,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:08:43" (1/1) ... [2022-11-20 20:08:43,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:08:43,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:08:43,857 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_61a61eab-2774-4873-a2a6-71897c1beeed/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2022-11-20 20:08:43,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:08:43,880 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:08:44,039 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_61a61eab-2774-4873-a2a6-71897c1beeed/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2022-11-20 20:08:44,046 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:08:44,079 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:08:44,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:08:44 WrapperNode [2022-11-20 20:08:44,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:08:44,081 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:08:44,081 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:08:44,082 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:08:44,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:08:44" (1/1) ... [2022-11-20 20:08:44,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:08:44" (1/1) ... [2022-11-20 20:08:44,170 INFO L138 Inliner]: procedures = 92, calls = 340, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 850 [2022-11-20 20:08:44,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:08:44,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:08:44,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:08:44,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:08:44,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:08:44" (1/1) ... [2022-11-20 20:08:44,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:08:44" (1/1) ... [2022-11-20 20:08:44,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:08:44" (1/1) ... [2022-11-20 20:08:44,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:08:44" (1/1) ... [2022-11-20 20:08:44,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:08:44" (1/1) ... [2022-11-20 20:08:44,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:08:44" (1/1) ... [2022-11-20 20:08:44,223 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:08:44" (1/1) ... [2022-11-20 20:08:44,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:08:44" (1/1) ... [2022-11-20 20:08:44,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:08:44,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:08:44,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:08:44,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:08:44,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:08:44" (1/1) ... [2022-11-20 20:08:44,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:08:44,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:08:44,312 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:08:44,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:08:44,369 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-20 20:08:44,369 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-20 20:08:44,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:08:44,369 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-20 20:08:44,369 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-20 20:08:44,370 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-20 20:08:44,370 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-20 20:08:44,370 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-20 20:08:44,370 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-20 20:08:44,370 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-20 20:08:44,370 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-20 20:08:44,370 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-20 20:08:44,370 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-20 20:08:44,371 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-20 20:08:44,371 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-20 20:08:44,371 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-20 20:08:44,371 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-20 20:08:44,371 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-20 20:08:44,371 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-20 20:08:44,371 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-20 20:08:44,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-20 20:08:44,372 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-20 20:08:44,372 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-20 20:08:44,373 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-20 20:08:44,373 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-20 20:08:44,373 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-20 20:08:44,374 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-20 20:08:44,374 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-20 20:08:44,374 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-20 20:08:44,374 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-20 20:08:44,376 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-20 20:08:44,376 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-20 20:08:44,376 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-20 20:08:44,376 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-20 20:08:44,376 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-20 20:08:44,376 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-20 20:08:44,377 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-20 20:08:44,377 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-20 20:08:44,377 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-20 20:08:44,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:08:44,377 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-20 20:08:44,377 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-20 20:08:44,377 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-20 20:08:44,378 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-20 20:08:44,378 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-20 20:08:44,378 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-20 20:08:44,378 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-20 20:08:44,379 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-20 20:08:44,379 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-11-20 20:08:44,380 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-11-20 20:08:44,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:08:44,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:08:44,380 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-20 20:08:44,380 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-20 20:08:44,577 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:08:44,579 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:08:45,772 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:08:46,627 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:08:46,627 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 20:08:46,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:08:46 BoogieIcfgContainer [2022-11-20 20:08:46,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:08:46,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:08:46,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:08:46,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:08:46,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:08:43" (1/3) ... [2022-11-20 20:08:46,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc9730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:08:46, skipping insertion in model container [2022-11-20 20:08:46,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:08:44" (2/3) ... [2022-11-20 20:08:46,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc9730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:08:46, skipping insertion in model container [2022-11-20 20:08:46,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:08:46" (3/3) ... [2022-11-20 20:08:46,654 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product21.cil.c [2022-11-20 20:08:46,675 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:08:46,675 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:08:46,759 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:08:46,767 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;@1703d496, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:08:46,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:08:46,777 INFO L276 IsEmpty]: Start isEmpty. Operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-20 20:08:46,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-20 20:08:46,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:08:46,815 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] [2022-11-20 20:08:46,817 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:08:46,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:08:46,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1790014537, now seen corresponding path program 1 times [2022-11-20 20:08:46,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:08:46,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840704443] [2022-11-20 20:08:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:08:46,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:08:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:08:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 20:08:47,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:08:47,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840704443] [2022-11-20 20:08:47,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840704443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:08:47,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:08:47,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:08:47,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62552924] [2022-11-20 20:08:47,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:08:47,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:08:47,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:08:47,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:08:47,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:08:47,902 INFO L87 Difference]: Start difference. First operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-20 20:08:48,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:08:48,375 INFO L93 Difference]: Finished difference Result 851 states and 1377 transitions. [2022-11-20 20:08:48,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:08:48,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 76 [2022-11-20 20:08:48,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:08:48,394 INFO L225 Difference]: With dead ends: 851 [2022-11-20 20:08:48,394 INFO L226 Difference]: Without dead ends: 490 [2022-11-20 20:08:48,401 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 [2022-11-20 20:08:48,404 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 282 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2344 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:08:48,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 2344 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:08:48,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-11-20 20:08:48,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 380. [2022-11-20 20:08:48,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 257 states have (on average 1.5719844357976653) internal successors, (404), 276 states have internal predecessors, (404), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2022-11-20 20:08:48,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 595 transitions. [2022-11-20 20:08:48,524 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 595 transitions. Word has length 76 [2022-11-20 20:08:48,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:08:48,525 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 595 transitions. [2022-11-20 20:08:48,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-20 20:08:48,531 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 595 transitions. [2022-11-20 20:08:48,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-20 20:08:48,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:08:48,539 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] [2022-11-20 20:08:48,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:08:48,540 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:08:48,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:08:48,541 INFO L85 PathProgramCache]: Analyzing trace with hash -798954435, now seen corresponding path program 1 times [2022-11-20 20:08:48,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:08:48,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091327880] [2022-11-20 20:08:48,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:08:48,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:08:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:08:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:08:49,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:08:49,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091327880] [2022-11-20 20:08:49,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091327880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:08:49,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:08:49,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 20:08:49,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983723315] [2022-11-20 20:08:49,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:08:49,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:08:49,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:08:49,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:08:49,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:08:49,061 INFO L87 Difference]: Start difference. First operand 380 states and 595 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-20 20:08:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:08:52,827 INFO L93 Difference]: Finished difference Result 1287 states and 2054 transitions. [2022-11-20 20:08:52,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 20:08:52,828 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 79 [2022-11-20 20:08:52,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:08:52,841 INFO L225 Difference]: With dead ends: 1287 [2022-11-20 20:08:52,841 INFO L226 Difference]: Without dead ends: 930 [2022-11-20 20:08:52,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:08:52,850 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 1740 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 3975 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1805 SdHoareTripleChecker+Valid, 2530 SdHoareTripleChecker+Invalid, 4570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 3975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:08:52,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1805 Valid, 2530 Invalid, 4570 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [595 Valid, 3975 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-20 20:08:52,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-11-20 20:08:52,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 874. [2022-11-20 20:08:52,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 614 states have (on average 1.5944625407166124) internal successors, (979), 645 states have internal predecessors, (979), 206 states have call successors, (206), 49 states have call predecessors, (206), 53 states have return successors, (213), 204 states have call predecessors, (213), 201 states have call successors, (213) [2022-11-20 20:08:52,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1398 transitions. [2022-11-20 20:08:52,933 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1398 transitions. Word has length 79 [2022-11-20 20:08:52,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:08:52,934 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1398 transitions. [2022-11-20 20:08:52,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-20 20:08:52,935 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1398 transitions. [2022-11-20 20:08:52,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-20 20:08:52,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:08:52,938 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:08:52,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 20:08:52,938 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:08:52,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:08:52,939 INFO L85 PathProgramCache]: Analyzing trace with hash -2051632693, now seen corresponding path program 1 times [2022-11-20 20:08:52,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:08:52,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530631052] [2022-11-20 20:08:52,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:08:52,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:08:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:08:53,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:08:53,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:08:53,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530631052] [2022-11-20 20:08:53,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530631052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:08:53,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:08:53,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:08:53,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666105070] [2022-11-20 20:08:53,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:08:53,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:08:53,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:08:53,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:08:53,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:08:53,314 INFO L87 Difference]: Start difference. First operand 874 states and 1398 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 20:08:53,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:08:53,552 INFO L93 Difference]: Finished difference Result 1477 states and 2374 transitions. [2022-11-20 20:08:53,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:08:53,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2022-11-20 20:08:53,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:08:53,564 INFO L225 Difference]: With dead ends: 1477 [2022-11-20 20:08:53,564 INFO L226 Difference]: Without dead ends: 963 [2022-11-20 20:08:53,569 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 [2022-11-20 20:08:53,574 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 42 mSDsluCounter, 2931 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3533 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:08:53,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 3533 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:08:53,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-11-20 20:08:53,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 895. [2022-11-20 20:08:53,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 629 states have (on average 1.5802861685214626) internal successors, (994), 660 states have internal predecessors, (994), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 210 states have call predecessors, (228), 201 states have call successors, (228) [2022-11-20 20:08:53,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1428 transitions. [2022-11-20 20:08:53,662 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1428 transitions. Word has length 83 [2022-11-20 20:08:53,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:08:53,663 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 1428 transitions. [2022-11-20 20:08:53,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 20:08:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1428 transitions. [2022-11-20 20:08:53,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-20 20:08:53,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:08:53,667 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] [2022-11-20 20:08:53,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 20:08:53,668 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:08:53,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:08:53,669 INFO L85 PathProgramCache]: Analyzing trace with hash 492286256, now seen corresponding path program 1 times [2022-11-20 20:08:53,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:08:53,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282256456] [2022-11-20 20:08:53,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:08:53,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:08:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:08:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:08:54,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:08:54,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282256456] [2022-11-20 20:08:54,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282256456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:08:54,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:08:54,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:08:54,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099059822] [2022-11-20 20:08:54,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:08:54,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:08:54,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:08:54,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:08:54,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:08:54,070 INFO L87 Difference]: Start difference. First operand 895 states and 1428 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 20:08:54,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:08:54,334 INFO L93 Difference]: Finished difference Result 1506 states and 2412 transitions. [2022-11-20 20:08:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:08:54,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 84 [2022-11-20 20:08:54,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:08:54,341 INFO L225 Difference]: With dead ends: 1506 [2022-11-20 20:08:54,341 INFO L226 Difference]: Without dead ends: 978 [2022-11-20 20:08:54,344 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 [2022-11-20 20:08:54,344 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 41 mSDsluCounter, 2946 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3552 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:08:54,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3552 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:08:54,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-11-20 20:08:54,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 898. [2022-11-20 20:08:54,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 632 states have (on average 1.5775316455696202) internal successors, (997), 660 states have internal predecessors, (997), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 213 states have call predecessors, (228), 201 states have call successors, (228) [2022-11-20 20:08:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1431 transitions. [2022-11-20 20:08:54,397 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1431 transitions. Word has length 84 [2022-11-20 20:08:54,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:08:54,397 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 1431 transitions. [2022-11-20 20:08:54,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 20:08:54,398 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1431 transitions. [2022-11-20 20:08:54,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-20 20:08:54,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:08:54,400 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] [2022-11-20 20:08:54,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 20:08:54,401 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:08:54,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:08:54,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1679655152, now seen corresponding path program 1 times [2022-11-20 20:08:54,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:08:54,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125450994] [2022-11-20 20:08:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:08:54,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:08:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:08:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:08:54,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:08:54,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125450994] [2022-11-20 20:08:54,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125450994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:08:54,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:08:54,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:08:54,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278421697] [2022-11-20 20:08:54,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:08:54,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:08:54,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:08:54,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:08:54,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:08:54,725 INFO L87 Difference]: Start difference. First operand 898 states and 1431 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 20:08:54,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:08:54,996 INFO L93 Difference]: Finished difference Result 1511 states and 2417 transitions. [2022-11-20 20:08:54,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:08:54,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 84 [2022-11-20 20:08:55,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:08:55,009 INFO L225 Difference]: With dead ends: 1511 [2022-11-20 20:08:55,009 INFO L226 Difference]: Without dead ends: 981 [2022-11-20 20:08:55,013 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 [2022-11-20 20:08:55,016 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 41 mSDsluCounter, 2950 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:08:55,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 3557 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:08:55,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-11-20 20:08:55,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 901. [2022-11-20 20:08:55,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 635 states have (on average 1.5748031496062993) internal successors, (1000), 660 states have internal predecessors, (1000), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 216 states have call predecessors, (228), 201 states have call successors, (228) [2022-11-20 20:08:55,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1434 transitions. [2022-11-20 20:08:55,090 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1434 transitions. Word has length 84 [2022-11-20 20:08:55,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:08:55,091 INFO L495 AbstractCegarLoop]: Abstraction has 901 states and 1434 transitions. [2022-11-20 20:08:55,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 20:08:55,091 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1434 transitions. [2022-11-20 20:08:55,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 20:08:55,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:08:55,100 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] [2022-11-20 20:08:55,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 20:08:55,100 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:08:55,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:08:55,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1136269027, now seen corresponding path program 1 times [2022-11-20 20:08:55,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:08:55,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594888878] [2022-11-20 20:08:55,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:08:55,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:08:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:08:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:08:55,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:08:55,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594888878] [2022-11-20 20:08:55,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594888878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:08:55,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:08:55,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:08:55,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178431343] [2022-11-20 20:08:55,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:08:55,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:08:55,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:08:55,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:08:55,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:08:55,506 INFO L87 Difference]: Start difference. First operand 901 states and 1434 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-20 20:08:58,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:08:58,239 INFO L93 Difference]: Finished difference Result 2053 states and 3286 transitions. [2022-11-20 20:08:58,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:08:58,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 87 [2022-11-20 20:08:58,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:08:58,278 INFO L225 Difference]: With dead ends: 2053 [2022-11-20 20:08:58,278 INFO L226 Difference]: Without dead ends: 1400 [2022-11-20 20:08:58,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:08:58,283 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 2664 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 2686 mSolverCounterSat, 1156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2828 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 3842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1156 IncrementalHoareTripleChecker+Valid, 2686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:08:58,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2828 Valid, 1329 Invalid, 3842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1156 Valid, 2686 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-20 20:08:58,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-11-20 20:08:58,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1302. [2022-11-20 20:08:58,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 904 states have (on average 1.5342920353982301) internal successors, (1387), 944 states have internal predecessors, (1387), 306 states have call successors, (306), 77 states have call predecessors, (306), 91 states have return successors, (346), 317 states have call predecessors, (346), 301 states have call successors, (346) [2022-11-20 20:08:58,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2039 transitions. [2022-11-20 20:08:58,374 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 2039 transitions. Word has length 87 [2022-11-20 20:08:58,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:08:58,374 INFO L495 AbstractCegarLoop]: Abstraction has 1302 states and 2039 transitions. [2022-11-20 20:08:58,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-20 20:08:58,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 2039 transitions. [2022-11-20 20:08:58,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-20 20:08:58,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:08:58,377 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] [2022-11-20 20:08:58,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 20:08:58,378 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:08:58,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:08:58,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1430013021, now seen corresponding path program 1 times [2022-11-20 20:08:58,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:08:58,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078545692] [2022-11-20 20:08:58,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:08:58,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:08:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:08:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:08:58,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:08:58,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078545692] [2022-11-20 20:08:58,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078545692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:08:58,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:08:58,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:08:58,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498376058] [2022-11-20 20:08:58,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:08:58,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:08:58,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:08:58,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:08:58,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:08:58,626 INFO L87 Difference]: Start difference. First operand 1302 states and 2039 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 20:08:59,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:08:59,039 INFO L93 Difference]: Finished difference Result 2584 states and 4121 transitions. [2022-11-20 20:08:59,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:08:59,040 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 90 [2022-11-20 20:08:59,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:08:59,050 INFO L225 Difference]: With dead ends: 2584 [2022-11-20 20:08:59,050 INFO L226 Difference]: Without dead ends: 1506 [2022-11-20 20:08:59,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:08:59,057 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 245 mSDsluCounter, 2078 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:08:59,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 2660 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:08:59,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-11-20 20:08:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-11-20 20:08:59,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1092 states have (on average 1.5393772893772895) internal successors, (1681), 1138 states have internal predecessors, (1681), 311 states have call successors, (311), 82 states have call predecessors, (311), 102 states have return successors, (351), 322 states have call predecessors, (351), 306 states have call successors, (351) [2022-11-20 20:08:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2343 transitions. [2022-11-20 20:08:59,161 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2343 transitions. Word has length 90 [2022-11-20 20:08:59,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:08:59,162 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2343 transitions. [2022-11-20 20:08:59,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 20:08:59,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2343 transitions. [2022-11-20 20:08:59,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-20 20:08:59,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:08:59,165 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] [2022-11-20 20:08:59,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 20:08:59,166 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:08:59,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:08:59,166 INFO L85 PathProgramCache]: Analyzing trace with hash 612290836, now seen corresponding path program 1 times [2022-11-20 20:08:59,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:08:59,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768209648] [2022-11-20 20:08:59,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:08:59,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:08:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:08:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:08:59,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:08:59,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768209648] [2022-11-20 20:08:59,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768209648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:08:59,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:08:59,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:08:59,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721152986] [2022-11-20 20:08:59,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:08:59,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:08:59,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:08:59,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:08:59,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:08:59,460 INFO L87 Difference]: Start difference. First operand 1506 states and 2343 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 20:09:02,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:02,647 INFO L93 Difference]: Finished difference Result 6203 states and 9924 transitions. [2022-11-20 20:09:02,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:09:02,648 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 91 [2022-11-20 20:09:02,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:02,685 INFO L225 Difference]: With dead ends: 6203 [2022-11-20 20:09:02,685 INFO L226 Difference]: Without dead ends: 4721 [2022-11-20 20:09:02,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:09:02,699 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 2111 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 2780 mSolverCounterSat, 895 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2189 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 3675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 895 IncrementalHoareTripleChecker+Valid, 2780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:02,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2189 Valid, 1475 Invalid, 3675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [895 Valid, 2780 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-20 20:09:02,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4721 states. [2022-11-20 20:09:03,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4721 to 4347. [2022-11-20 20:09:03,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4347 states, 3197 states have (on average 1.539255552080075) internal successors, (4921), 3329 states have internal predecessors, (4921), 859 states have call successors, (859), 226 states have call predecessors, (859), 290 states have return successors, (1081), 882 states have call predecessors, (1081), 854 states have call successors, (1081) [2022-11-20 20:09:03,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 6861 transitions. [2022-11-20 20:09:03,117 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 6861 transitions. Word has length 91 [2022-11-20 20:09:03,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:03,117 INFO L495 AbstractCegarLoop]: Abstraction has 4347 states and 6861 transitions. [2022-11-20 20:09:03,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 20:09:03,118 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 6861 transitions. [2022-11-20 20:09:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-20 20:09:03,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:03,121 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] [2022-11-20 20:09:03,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 20:09:03,122 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:09:03,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:03,122 INFO L85 PathProgramCache]: Analyzing trace with hash -133654052, now seen corresponding path program 1 times [2022-11-20 20:09:03,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:09:03,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921564086] [2022-11-20 20:09:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:09:03,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:09:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:09:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:09:03,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:09:03,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921564086] [2022-11-20 20:09:03,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921564086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:03,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:03,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:09:03,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415513778] [2022-11-20 20:09:03,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:03,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:09:03,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:09:03,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:09:03,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:09:03,520 INFO L87 Difference]: Start difference. First operand 4347 states and 6861 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2022-11-20 20:09:05,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:05,984 INFO L93 Difference]: Finished difference Result 8235 states and 13096 transitions. [2022-11-20 20:09:05,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:09:05,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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 92 [2022-11-20 20:09:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:06,023 INFO L225 Difference]: With dead ends: 8235 [2022-11-20 20:09:06,024 INFO L226 Difference]: Without dead ends: 4853 [2022-11-20 20:09:06,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:09:06,047 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 990 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 2543 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 2942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 2543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:06,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1066 Valid, 1624 Invalid, 2942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 2543 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-20 20:09:06,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4853 states. [2022-11-20 20:09:06,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4853 to 4457. [2022-11-20 20:09:06,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4457 states, 3273 states have (on average 1.5346776657500765) internal successors, (5023), 3417 states have internal predecessors, (5023), 868 states have call successors, (868), 241 states have call predecessors, (868), 315 states have return successors, (1121), 888 states have call predecessors, (1121), 863 states have call successors, (1121) [2022-11-20 20:09:06,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4457 states to 4457 states and 7012 transitions. [2022-11-20 20:09:06,421 INFO L78 Accepts]: Start accepts. Automaton has 4457 states and 7012 transitions. Word has length 92 [2022-11-20 20:09:06,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:06,422 INFO L495 AbstractCegarLoop]: Abstraction has 4457 states and 7012 transitions. [2022-11-20 20:09:06,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2022-11-20 20:09:06,423 INFO L276 IsEmpty]: Start isEmpty. Operand 4457 states and 7012 transitions. [2022-11-20 20:09:06,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 20:09:06,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:06,429 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] [2022-11-20 20:09:06,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 20:09:06,429 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:09:06,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:06,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1977267992, now seen corresponding path program 1 times [2022-11-20 20:09:06,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:09:06,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004881708] [2022-11-20 20:09:06,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:09:06,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:09:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:09:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 20:09:06,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:09:06,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004881708] [2022-11-20 20:09:06,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004881708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:06,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:06,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:09:06,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515299628] [2022-11-20 20:09:06,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:06,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:09:06,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:09:06,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:09:06,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:09:06,890 INFO L87 Difference]: Start difference. First operand 4457 states and 7012 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-20 20:09:07,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:07,743 INFO L93 Difference]: Finished difference Result 4551 states and 7164 transitions. [2022-11-20 20:09:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:09:07,744 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 96 [2022-11-20 20:09:07,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:07,775 INFO L225 Difference]: With dead ends: 4551 [2022-11-20 20:09:07,776 INFO L226 Difference]: Without dead ends: 4536 [2022-11-20 20:09:07,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:09:07,783 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 685 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:07,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 1832 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:09:07,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2022-11-20 20:09:08,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 4463. [2022-11-20 20:09:08,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 3279 states have (on average 1.5336992985666362) internal successors, (5029), 3423 states have internal predecessors, (5029), 868 states have call successors, (868), 241 states have call predecessors, (868), 315 states have return successors, (1121), 888 states have call predecessors, (1121), 863 states have call successors, (1121) [2022-11-20 20:09:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 7018 transitions. [2022-11-20 20:09:08,187 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 7018 transitions. Word has length 96 [2022-11-20 20:09:08,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:08,187 INFO L495 AbstractCegarLoop]: Abstraction has 4463 states and 7018 transitions. [2022-11-20 20:09:08,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-20 20:09:08,189 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 7018 transitions. [2022-11-20 20:09:08,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-20 20:09:08,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:08,191 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] [2022-11-20 20:09:08,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 20:09:08,192 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:09:08,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:08,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1976842914, now seen corresponding path program 1 times [2022-11-20 20:09:08,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:09:08,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154050897] [2022-11-20 20:09:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:09:08,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:09:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:09:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 20:09:08,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:09:08,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154050897] [2022-11-20 20:09:08,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154050897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:08,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:08,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 20:09:08,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744785026] [2022-11-20 20:09:08,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:08,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:09:08,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:09:08,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:09:08,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:09:08,612 INFO L87 Difference]: Start difference. First operand 4463 states and 7018 transitions. Second operand has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-20 20:09:09,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:09,291 INFO L93 Difference]: Finished difference Result 4916 states and 7709 transitions. [2022-11-20 20:09:09,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 20:09:09,292 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) Word has length 102 [2022-11-20 20:09:09,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:09,330 INFO L225 Difference]: With dead ends: 4916 [2022-11-20 20:09:09,330 INFO L226 Difference]: Without dead ends: 4469 [2022-11-20 20:09:09,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:09:09,336 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 319 mSDsluCounter, 3682 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 4252 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:09,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 4252 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:09:09,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2022-11-20 20:09:09,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 4463. [2022-11-20 20:09:09,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 3279 states have (on average 1.5019823116803903) internal successors, (4925), 3423 states have internal predecessors, (4925), 868 states have call successors, (868), 241 states have call predecessors, (868), 315 states have return successors, (1121), 888 states have call predecessors, (1121), 863 states have call successors, (1121) [2022-11-20 20:09:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 6914 transitions. [2022-11-20 20:09:09,886 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 6914 transitions. Word has length 102 [2022-11-20 20:09:09,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:09,887 INFO L495 AbstractCegarLoop]: Abstraction has 4463 states and 6914 transitions. [2022-11-20 20:09:09,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-20 20:09:09,887 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 6914 transitions. [2022-11-20 20:09:09,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-20 20:09:09,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:09,890 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] [2022-11-20 20:09:09,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 20:09:09,891 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:09:09,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:09,891 INFO L85 PathProgramCache]: Analyzing trace with hash 826552684, now seen corresponding path program 1 times [2022-11-20 20:09:09,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:09:09,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119962156] [2022-11-20 20:09:09,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:09:09,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:09:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:09:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 20:09:10,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:09:10,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119962156] [2022-11-20 20:09:10,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119962156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:10,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:10,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:09:10,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937483725] [2022-11-20 20:09:10,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:10,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:09:10,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:09:10,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:09:10,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:09:10,566 INFO L87 Difference]: Start difference. First operand 4463 states and 6914 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 7 states have internal predecessors, (64), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-20 20:09:15,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:15,098 INFO L93 Difference]: Finished difference Result 16307 states and 25654 transitions. [2022-11-20 20:09:15,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:09:15,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 7 states have internal predecessors, (64), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 108 [2022-11-20 20:09:15,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:15,164 INFO L225 Difference]: With dead ends: 16307 [2022-11-20 20:09:15,164 INFO L226 Difference]: Without dead ends: 11867 [2022-11-20 20:09:15,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:09:15,187 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 2600 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 3069 mSolverCounterSat, 1035 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2664 SdHoareTripleChecker+Valid, 1650 SdHoareTripleChecker+Invalid, 4104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1035 IncrementalHoareTripleChecker+Valid, 3069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:15,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2664 Valid, 1650 Invalid, 4104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1035 Valid, 3069 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-20 20:09:15,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11867 states. [2022-11-20 20:09:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11867 to 10582. [2022-11-20 20:09:16,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10582 states, 7735 states have (on average 1.5148028442146089) internal successors, (11717), 8102 states have internal predecessors, (11717), 2158 states have call successors, (2158), 522 states have call predecessors, (2158), 688 states have return successors, (2706), 2092 states have call predecessors, (2706), 2153 states have call successors, (2706) [2022-11-20 20:09:16,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10582 states to 10582 states and 16581 transitions. [2022-11-20 20:09:16,613 INFO L78 Accepts]: Start accepts. Automaton has 10582 states and 16581 transitions. Word has length 108 [2022-11-20 20:09:16,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:16,613 INFO L495 AbstractCegarLoop]: Abstraction has 10582 states and 16581 transitions. [2022-11-20 20:09:16,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 7 states have internal predecessors, (64), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-20 20:09:16,614 INFO L276 IsEmpty]: Start isEmpty. Operand 10582 states and 16581 transitions. [2022-11-20 20:09:16,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-20 20:09:16,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:16,618 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] [2022-11-20 20:09:16,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 20:09:16,618 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:09:16,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:16,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1131127679, now seen corresponding path program 1 times [2022-11-20 20:09:16,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:09:16,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221435995] [2022-11-20 20:09:16,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:09:16,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:09:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:09:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 20:09:18,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:09:18,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221435995] [2022-11-20 20:09:18,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221435995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:09:18,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931078972] [2022-11-20 20:09:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:09:18,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:09:18,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:09:18,958 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:09:18,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:09:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:09:19,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 20:09:19,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 20:09:22,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:09:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:09:25,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931078972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:09:25,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1888657452] [2022-11-20 20:09:25,427 INFO L159 IcfgInterpreter]: Started Sifa with 102 locations of interest [2022-11-20 20:09:25,427 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:09:25,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:09:25,436 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:09:25,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:09:34,056 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 584 for LOIs [2022-11-20 20:10:48,204 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 584 for LOIs [2022-11-20 20:10:56,975 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 102 for LOIs [2022-11-20 20:10:57,068 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 66 for LOIs [2022-11-20 20:10:57,085 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 75 for LOIs [2022-11-20 20:10:57,102 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 108 for LOIs [2022-11-20 20:10:57,115 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 591 for LOIs [2022-11-20 20:11:01,093 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 471 for LOIs [2022-11-20 20:11:01,399 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 104 for LOIs [2022-11-20 20:11:01,750 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 99 for LOIs [2022-11-20 20:11:01,765 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 554 for LOIs [2022-11-20 20:11:04,680 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 829 for LOIs [2022-11-20 20:11:16,044 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 656 for LOIs [2022-11-20 20:11:16,594 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:11:32,861 WARN L233 SmtUtils]: Spent 7.38s on a formula simplification. DAG size of input: 656 DAG size of output: 587 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:11:41,116 WARN L233 SmtUtils]: Spent 7.65s on a formula simplification. DAG size of input: 696 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:11:49,352 WARN L233 SmtUtils]: Spent 7.79s on a formula simplification. DAG size of input: 673 DAG size of output: 611 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:11:57,597 WARN L233 SmtUtils]: Spent 7.80s on a formula simplification. DAG size of input: 673 DAG size of output: 611 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:12:18,796 WARN L233 SmtUtils]: Spent 20.50s on a formula simplification. DAG size of input: 829 DAG size of output: 681 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:12:38,724 WARN L233 SmtUtils]: Spent 18.90s on a formula simplification. DAG size of input: 902 DAG size of output: 807 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:13:52,632 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 543 DAG size of output: 481 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:14:00,028 WARN L233 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 545 DAG size of output: 507 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:14:07,501 WARN L233 SmtUtils]: Spent 6.65s on a formula simplification. DAG size of input: 548 DAG size of output: 510 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:14:25,917 WARN L233 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 557 DAG size of output: 487 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:14:32,793 WARN L233 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 557 DAG size of output: 488 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:14:40,301 WARN L233 SmtUtils]: Spent 6.58s on a formula simplification. DAG size of input: 560 DAG size of output: 496 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:14:47,103 WARN L233 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 563 DAG size of output: 492 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:14:53,960 WARN L233 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 569 DAG size of output: 498 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:15:00,997 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 585 DAG size of output: 508 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:15:01,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1888657452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:01,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:15:01,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [20, 12, 12] total 98 [2022-11-20 20:15:01,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632862065] [2022-11-20 20:15:01,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:01,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-20 20:15:01,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:01,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-20 20:15:01,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=669, Invalid=8837, Unknown=0, NotChecked=0, Total=9506 [2022-11-20 20:15:01,007 INFO L87 Difference]: Start difference. First operand 10582 states and 16581 transitions. Second operand has 63 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 41 states have internal predecessors, (67), 17 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (19), 16 states have call predecessors, (19), 17 states have call successors, (19) [2022-11-20 20:15:08,306 WARN L233 SmtUtils]: Spent 6.45s on a formula simplification. DAG size of input: 727 DAG size of output: 649 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:15:15,365 WARN L233 SmtUtils]: Spent 6.58s on a formula simplification. DAG size of input: 739 DAG size of output: 656 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:15:22,329 WARN L233 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 744 DAG size of output: 660 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:15:45,140 WARN L233 SmtUtils]: Spent 5.25s on a formula simplification. DAG size of input: 606 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:15:50,907 WARN L233 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 612 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:15:57,487 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 644 DAG size of output: 614 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:16:04,087 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 640 DAG size of output: 610 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:16:10,301 WARN L233 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 623 DAG size of output: 596 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:16:16,612 WARN L233 SmtUtils]: Spent 5.86s on a formula simplification. DAG size of input: 629 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:16:24,133 WARN L233 SmtUtils]: Spent 6.91s on a formula simplification. DAG size of input: 681 DAG size of output: 616 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:16:31,696 WARN L233 SmtUtils]: Spent 6.96s on a formula simplification. DAG size of input: 684 DAG size of output: 619 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:16:39,372 WARN L233 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 688 DAG size of output: 623 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:16:47,106 WARN L233 SmtUtils]: Spent 7.10s on a formula simplification. DAG size of input: 690 DAG size of output: 625 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:17:34,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:17:34,570 INFO L93 Difference]: Finished difference Result 21258 states and 33329 transitions. [2022-11-20 20:17:34,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 20:17:34,571 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 41 states have internal predecessors, (67), 17 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (19), 16 states have call predecessors, (19), 17 states have call successors, (19) Word has length 111 [2022-11-20 20:17:34,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:17:34,630 INFO L225 Difference]: With dead ends: 21258 [2022-11-20 20:17:34,630 INFO L226 Difference]: Without dead ends: 10696 [2022-11-20 20:17:34,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 257 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4374 ImplicationChecksByTransitivity, 326.7s TimeCoverageRelationStatistics Valid=942, Invalid=11940, Unknown=0, NotChecked=0, Total=12882 [2022-11-20 20:17:34,671 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 193 mSDsluCounter, 8056 mSDsCounter, 0 mSdLazyCounter, 12140 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 8558 SdHoareTripleChecker+Invalid, 12191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 12140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:17:34,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 8558 Invalid, 12191 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [51 Valid, 12140 Invalid, 0 Unknown, 0 Unchecked, 51.1s Time] [2022-11-20 20:17:34,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10696 states. [2022-11-20 20:17:35,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10696 to 10614. [2022-11-20 20:17:35,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10614 states, 7758 states have (on average 1.5134055168857954) internal successors, (11741), 8126 states have internal predecessors, (11741), 2162 states have call successors, (2162), 527 states have call predecessors, (2162), 693 states have return successors, (2711), 2095 states have call predecessors, (2711), 2157 states have call successors, (2711) [2022-11-20 20:17:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10614 states to 10614 states and 16614 transitions. [2022-11-20 20:17:35,819 INFO L78 Accepts]: Start accepts. Automaton has 10614 states and 16614 transitions. Word has length 111 [2022-11-20 20:17:35,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:17:35,820 INFO L495 AbstractCegarLoop]: Abstraction has 10614 states and 16614 transitions. [2022-11-20 20:17:35,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 41 states have internal predecessors, (67), 17 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (19), 16 states have call predecessors, (19), 17 states have call successors, (19) [2022-11-20 20:17:35,820 INFO L276 IsEmpty]: Start isEmpty. Operand 10614 states and 16614 transitions. [2022-11-20 20:17:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-20 20:17:35,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:17:35,824 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] [2022-11-20 20:17:35,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 20:17:36,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 20:17:36,033 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:17:36,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:17:36,034 INFO L85 PathProgramCache]: Analyzing trace with hash 98529616, now seen corresponding path program 1 times [2022-11-20 20:17:36,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:17:36,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322843509] [2022-11-20 20:17:36,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:17:36,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:17:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:17:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 20:17:38,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:17:38,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322843509] [2022-11-20 20:17:38,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322843509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:17:38,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134269600] [2022-11-20 20:17:38,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:17:38,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:17:38,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:17:38,070 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:17:38,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a61eab-2774-4873-a2a6-71897c1beeed/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:17:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:17:38,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1878 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 20:17:38,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:17:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 20:17:40,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:17:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:17:43,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134269600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:17:43,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1831806388] [2022-11-20 20:17:43,151 INFO L159 IcfgInterpreter]: Started Sifa with 101 locations of interest [2022-11-20 20:17:43,151 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:17:43,152 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:17:43,152 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:17:43,152 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:17:48,731 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 584 for LOIs [2022-11-20 20:18:57,626 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 584 for LOIs [2022-11-20 20:19:05,654 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 102 for LOIs [2022-11-20 20:19:06,199 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__weight with input of size 116 for LOIs [2022-11-20 20:19:06,761 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 31 for LOIs [2022-11-20 20:19:06,771 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 75 for LOIs [2022-11-20 20:19:06,789 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 93 for LOIs [2022-11-20 20:19:06,801 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 591 for LOIs [2022-11-20 20:19:10,669 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 453 for LOIs [2022-11-20 20:19:10,956 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 101 for LOIs [2022-11-20 20:19:11,279 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 75 for LOIs [2022-11-20 20:19:11,285 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 554 for LOIs [2022-11-20 20:19:14,149 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 829 for LOIs