./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b26bb19-d534-4a7a-bb9a-963255647ba2/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b26bb19-d534-4a7a-bb9a-963255647ba2/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b26bb19-d534-4a7a-bb9a-963255647ba2/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b26bb19-d534-4a7a-bb9a-963255647ba2/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b26bb19-d534-4a7a-bb9a-963255647ba2/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b26bb19-d534-4a7a-bb9a-963255647ba2/bin/utaipan-G1rejxKTta --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:37:41,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:37:41,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:37:41,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:37:41,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:37:41,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:37:41,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:37:41,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:37:41,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:37:41,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:37:41,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:37:41,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:37:41,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:37:41,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:37:41,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:37:41,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:37:41,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:37:41,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:37:41,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:37:41,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:37:41,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:37:41,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:37:41,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:37:41,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:37:41,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:37:41,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:37:41,122 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:37:41,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:37:41,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:37:41,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:37:41,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:37:41,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:37:41,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:37:41,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:37:41,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:37:41,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:37:41,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:37:41,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:37:41,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:37:41,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:37:41,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:37:41,139 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b26bb19-d534-4a7a-bb9a-963255647ba2/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:37:41,200 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:37:41,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:37:41,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:37:41,201 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:37:41,203 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:37:41,203 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:37:41,203 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:37:41,203 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:37:41,204 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:37:41,204 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:37:41,205 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:37:41,205 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:37:41,206 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:37:41,206 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:37:41,206 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:37:41,206 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:37:41,207 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:37:41,207 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:37:41,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:37:41,208 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:37:41,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:37:41,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:37:41,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:37:41,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:37:41,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:37:41,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:37:41,211 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:37:41,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:37:41,211 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:37:41,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:37:41,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:37:41,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:37:41,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:37:41,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:37:41,213 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:37:41,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:37:41,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:37:41,214 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:37:41,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:37:41,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:37:41,226 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:37:41,227 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_9b26bb19-d534-4a7a-bb9a-963255647ba2/bin/utaipan-G1rejxKTta/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b26bb19-d534-4a7a-bb9a-963255647ba2/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d [2022-10-17 17:37:41,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:37:41,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:37:41,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:37:41,563 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:37:41,564 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:37:41,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b26bb19-d534-4a7a-bb9a-963255647ba2/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2022-10-17 17:37:41,638 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b26bb19-d534-4a7a-bb9a-963255647ba2/bin/utaipan-G1rejxKTta/data/75fbd7114/e4cbdb4e4aba47489407a76628e5e873/FLAG6a39ce0bf [2022-10-17 17:37:42,333 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:37:42,333 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b26bb19-d534-4a7a-bb9a-963255647ba2/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2022-10-17 17:37:42,368 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b26bb19-d534-4a7a-bb9a-963255647ba2/bin/utaipan-G1rejxKTta/data/75fbd7114/e4cbdb4e4aba47489407a76628e5e873/FLAG6a39ce0bf [2022-10-17 17:37:42,524 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b26bb19-d534-4a7a-bb9a-963255647ba2/bin/utaipan-G1rejxKTta/data/75fbd7114/e4cbdb4e4aba47489407a76628e5e873 [2022-10-17 17:37:42,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:37:42,529 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:37:42,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:37:42,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:37:42,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:37:42,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:37:42" (1/1) ... [2022-10-17 17:37:42,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45ae7886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:42, skipping insertion in model container [2022-10-17 17:37:42,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:37:42" (1/1) ... [2022-10-17 17:37:42,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:37:42,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:37:43,309 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b26bb19-d534-4a7a-bb9a-963255647ba2/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2022-10-17 17:37:43,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:37:43,338 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:37:43,524 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b26bb19-d534-4a7a-bb9a-963255647ba2/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2022-10-17 17:37:43,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:37:43,576 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:37:43,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:43 WrapperNode [2022-10-17 17:37:43,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:37:43,578 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:37:43,578 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:37:43,578 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:37:43,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:43" (1/1) ... [2022-10-17 17:37:43,638 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:43" (1/1) ... [2022-10-17 17:37:43,707 INFO L138 Inliner]: procedures = 93, calls = 340, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 861 [2022-10-17 17:37:43,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:37:43,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:37:43,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:37:43,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:37:43,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:43" (1/1) ... [2022-10-17 17:37:43,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:43" (1/1) ... [2022-10-17 17:37:43,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:43" (1/1) ... [2022-10-17 17:37:43,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:43" (1/1) ... [2022-10-17 17:37:43,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:43" (1/1) ... [2022-10-17 17:37:43,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:43" (1/1) ... [2022-10-17 17:37:43,780 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:43" (1/1) ... [2022-10-17 17:37:43,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:43" (1/1) ... [2022-10-17 17:37:43,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:37:43,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:37:43,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:37:43,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:37:43,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:43" (1/1) ... [2022-10-17 17:37:43,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:37:43,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b26bb19-d534-4a7a-bb9a-963255647ba2/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:43,834 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b26bb19-d534-4a7a-bb9a-963255647ba2/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:37:43,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b26bb19-d534-4a7a-bb9a-963255647ba2/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:37:43,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:37:43,925 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-10-17 17:37:43,926 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-10-17 17:37:43,926 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-10-17 17:37:43,926 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-10-17 17:37:43,926 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-10-17 17:37:43,926 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-10-17 17:37:43,927 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-10-17 17:37:43,927 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-10-17 17:37:43,927 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-10-17 17:37:43,927 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-10-17 17:37:43,927 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-10-17 17:37:43,928 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-10-17 17:37:43,928 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-10-17 17:37:43,928 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-10-17 17:37:43,928 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-10-17 17:37:43,928 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-10-17 17:37:43,929 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-10-17 17:37:43,929 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-10-17 17:37:43,929 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-10-17 17:37:43,929 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-10-17 17:37:43,929 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-10-17 17:37:43,929 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-10-17 17:37:43,930 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-10-17 17:37:43,930 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-10-17 17:37:43,930 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-10-17 17:37:43,930 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-10-17 17:37:43,930 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-10-17 17:37:43,931 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-10-17 17:37:43,931 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2022-10-17 17:37:43,933 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2022-10-17 17:37:43,933 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-10-17 17:37:43,933 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-10-17 17:37:43,934 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-10-17 17:37:43,934 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-10-17 17:37:43,934 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-10-17 17:37:43,934 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-10-17 17:37:43,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:37:43,935 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-10-17 17:37:43,935 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-10-17 17:37:43,935 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-10-17 17:37:43,935 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-10-17 17:37:43,936 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-10-17 17:37:43,936 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-10-17 17:37:43,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:37:43,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:37:43,938 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-10-17 17:37:43,938 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-10-17 17:37:44,118 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:37:44,120 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:37:45,187 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:37:46,050 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:37:46,050 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 17:37:46,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:37:46 BoogieIcfgContainer [2022-10-17 17:37:46,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:37:46,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:37:46,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:37:46,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:37:46,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:37:42" (1/3) ... [2022-10-17 17:37:46,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bf543d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:37:46, skipping insertion in model container [2022-10-17 17:37:46,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:43" (2/3) ... [2022-10-17 17:37:46,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bf543d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:37:46, skipping insertion in model container [2022-10-17 17:37:46,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:37:46" (3/3) ... [2022-10-17 17:37:46,063 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product26.cil.c [2022-10-17 17:37:46,082 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:37:46,083 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:37:46,145 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:37:46,152 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;@4349e4c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:37:46,153 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:37:46,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 356 states, 241 states have (on average 1.6182572614107884) internal successors, (390), 264 states have internal predecessors, (390), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) [2022-10-17 17:37:46,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-10-17 17:37:46,175 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:46,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:46,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:46,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:46,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1992612055, now seen corresponding path program 1 times [2022-10-17 17:37:46,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:46,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350552275] [2022-10-17 17:37:46,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:46,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:46,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:46,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350552275] [2022-10-17 17:37:46,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350552275] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:46,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:46,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:37:46,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323819758] [2022-10-17 17:37:46,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:46,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:37:46,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:46,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:37:46,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:37:46,729 INFO L87 Difference]: Start difference. First operand has 356 states, 241 states have (on average 1.6182572614107884) internal successors, (390), 264 states have internal predecessors, (390), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-10-17 17:37:46,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:46,997 INFO L93 Difference]: Finished difference Result 374 states and 599 transitions. [2022-10-17 17:37:46,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:37:46,999 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-10-17 17:37:47,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:47,030 INFO L225 Difference]: With dead ends: 374 [2022-10-17 17:37:47,031 INFO L226 Difference]: Without dead ends: 352 [2022-10-17 17:37:47,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:37:47,040 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:47,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 530 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:37:47,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-10-17 17:37:47,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2022-10-17 17:37:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 239 states have (on average 1.606694560669456) internal successors, (384), 260 states have internal predecessors, (384), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 83 states have call predecessors, (86), 86 states have call successors, (86) [2022-10-17 17:37:47,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 561 transitions. [2022-10-17 17:37:47,127 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 561 transitions. Word has length 39 [2022-10-17 17:37:47,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:47,128 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 561 transitions. [2022-10-17 17:37:47,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-10-17 17:37:47,129 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 561 transitions. [2022-10-17 17:37:47,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-17 17:37:47,134 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:47,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:47,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:37:47,135 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:47,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:47,136 INFO L85 PathProgramCache]: Analyzing trace with hash -707727992, now seen corresponding path program 1 times [2022-10-17 17:37:47,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:47,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604876892] [2022-10-17 17:37:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:47,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:47,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:47,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604876892] [2022-10-17 17:37:47,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604876892] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:47,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:47,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:37:47,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593175446] [2022-10-17 17:37:47,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:47,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:37:47,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:47,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:37:47,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:37:47,792 INFO L87 Difference]: Start difference. First operand 352 states and 561 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-10-17 17:37:49,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:49,947 INFO L93 Difference]: Finished difference Result 1156 states and 1884 transitions. [2022-10-17 17:37:49,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:37:49,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-10-17 17:37:49,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:49,956 INFO L225 Difference]: With dead ends: 1156 [2022-10-17 17:37:49,957 INFO L226 Difference]: Without dead ends: 820 [2022-10-17 17:37:49,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:37:49,964 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 1150 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:49,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1210 Valid, 1286 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-10-17 17:37:49,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-10-17 17:37:50,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 733. [2022-10-17 17:37:50,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 521 states have (on average 1.6314779270633397) internal successors, (850), 551 states have internal predecessors, (850), 174 states have call successors, (174), 36 states have call predecessors, (174), 37 states have return successors, (176), 158 states have call predecessors, (176), 169 states have call successors, (176) [2022-10-17 17:37:50,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1200 transitions. [2022-10-17 17:37:50,086 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1200 transitions. Word has length 40 [2022-10-17 17:37:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:50,088 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 1200 transitions. [2022-10-17 17:37:50,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-10-17 17:37:50,088 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1200 transitions. [2022-10-17 17:37:50,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-10-17 17:37:50,098 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:50,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:50,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:37:50,099 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:50,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:50,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1073773829, now seen corresponding path program 1 times [2022-10-17 17:37:50,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:50,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737244516] [2022-10-17 17:37:50,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:50,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:50,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:50,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737244516] [2022-10-17 17:37:50,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737244516] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:50,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:50,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:37:50,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505850751] [2022-10-17 17:37:50,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:50,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:37:50,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:50,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:37:50,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:37:50,560 INFO L87 Difference]: Start difference. First operand 733 states and 1200 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-10-17 17:37:52,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:52,870 INFO L93 Difference]: Finished difference Result 2499 states and 4138 transitions. [2022-10-17 17:37:52,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 17:37:52,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2022-10-17 17:37:52,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:52,919 INFO L225 Difference]: With dead ends: 2499 [2022-10-17 17:37:52,919 INFO L226 Difference]: Without dead ends: 1783 [2022-10-17 17:37:52,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-10-17 17:37:52,930 INFO L413 NwaCegarLoop]: 744 mSDtfsCounter, 1635 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 2164 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1698 SdHoareTripleChecker+Valid, 2073 SdHoareTripleChecker+Invalid, 2685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 2164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:52,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1698 Valid, 2073 Invalid, 2685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 2164 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-10-17 17:37:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2022-10-17 17:37:53,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1696. [2022-10-17 17:37:53,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1233 states have (on average 1.64882400648824) internal successors, (2033), 1293 states have internal predecessors, (2033), 376 states have call successors, (376), 75 states have call predecessors, (376), 86 states have return successors, (403), 351 states have call predecessors, (403), 371 states have call successors, (403) [2022-10-17 17:37:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2812 transitions. [2022-10-17 17:37:53,155 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2812 transitions. Word has length 62 [2022-10-17 17:37:53,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:53,156 INFO L495 AbstractCegarLoop]: Abstraction has 1696 states and 2812 transitions. [2022-10-17 17:37:53,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-10-17 17:37:53,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2812 transitions. [2022-10-17 17:37:53,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-10-17 17:37:53,161 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:53,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:53,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:37:53,163 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:53,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:53,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1978141964, now seen corresponding path program 1 times [2022-10-17 17:37:53,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:53,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152958951] [2022-10-17 17:37:53,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:53,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:53,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:53,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152958951] [2022-10-17 17:37:53,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152958951] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:53,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:53,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:37:53,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830203282] [2022-10-17 17:37:53,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:53,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:37:53,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:53,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:37:53,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:53,436 INFO L87 Difference]: Start difference. First operand 1696 states and 2812 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-10-17 17:37:53,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:53,713 INFO L93 Difference]: Finished difference Result 2734 states and 4540 transitions. [2022-10-17 17:37:53,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:37:53,713 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2022-10-17 17:37:53,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:53,728 INFO L225 Difference]: With dead ends: 2734 [2022-10-17 17:37:53,728 INFO L226 Difference]: Without dead ends: 1736 [2022-10-17 17:37:53,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:53,736 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 7 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2081 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:53,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2081 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:37:53,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2022-10-17 17:37:53,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1720. [2022-10-17 17:37:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1251 states have (on average 1.6394884092725819) internal successors, (2051), 1311 states have internal predecessors, (2051), 376 states have call successors, (376), 75 states have call predecessors, (376), 92 states have return successors, (415), 357 states have call predecessors, (415), 371 states have call successors, (415) [2022-10-17 17:37:53,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 2842 transitions. [2022-10-17 17:37:53,895 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 2842 transitions. Word has length 66 [2022-10-17 17:37:53,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:53,896 INFO L495 AbstractCegarLoop]: Abstraction has 1720 states and 2842 transitions. [2022-10-17 17:37:53,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-10-17 17:37:53,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 2842 transitions. [2022-10-17 17:37:53,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-10-17 17:37:53,900 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:53,900 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:53,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:37:53,901 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:53,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:53,901 INFO L85 PathProgramCache]: Analyzing trace with hash 448744988, now seen corresponding path program 1 times [2022-10-17 17:37:53,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:53,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007828539] [2022-10-17 17:37:53,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:53,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:54,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:54,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007828539] [2022-10-17 17:37:54,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007828539] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:54,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:54,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 17:37:54,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46633903] [2022-10-17 17:37:54,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:54,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:37:54,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:54,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:37:54,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:37:54,302 INFO L87 Difference]: Start difference. First operand 1720 states and 2842 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-10-17 17:37:56,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:56,705 INFO L93 Difference]: Finished difference Result 3888 states and 6426 transitions. [2022-10-17 17:37:56,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:37:56,706 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 70 [2022-10-17 17:37:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:56,736 INFO L225 Difference]: With dead ends: 3888 [2022-10-17 17:37:56,736 INFO L226 Difference]: Without dead ends: 2674 [2022-10-17 17:37:56,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:37:56,749 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 1316 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 2359 mSolverCounterSat, 513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 1829 SdHoareTripleChecker+Invalid, 2872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 2359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:56,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1464 Valid, 1829 Invalid, 2872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [513 Valid, 2359 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-10-17 17:37:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2022-10-17 17:37:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2508. [2022-10-17 17:37:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 1796 states have (on average 1.596325167037862) internal successors, (2867), 1887 states have internal predecessors, (2867), 560 states have call successors, (560), 122 states have call predecessors, (560), 151 states have return successors, (635), 533 states have call predecessors, (635), 555 states have call successors, (635) [2022-10-17 17:37:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 4062 transitions. [2022-10-17 17:37:57,041 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 4062 transitions. Word has length 70 [2022-10-17 17:37:57,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:57,042 INFO L495 AbstractCegarLoop]: Abstraction has 2508 states and 4062 transitions. [2022-10-17 17:37:57,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-10-17 17:37:57,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 4062 transitions. [2022-10-17 17:37:57,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-10-17 17:37:57,045 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:57,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:57,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:37:57,046 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:57,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:57,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1943928479, now seen corresponding path program 1 times [2022-10-17 17:37:57,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:57,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185027376] [2022-10-17 17:37:57,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:57,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:57,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:57,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185027376] [2022-10-17 17:37:57,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185027376] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:57,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:57,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-10-17 17:37:57,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251758994] [2022-10-17 17:37:57,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:57,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 17:37:57,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:57,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 17:37:57,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:37:57,547 INFO L87 Difference]: Start difference. First operand 2508 states and 4062 transitions. Second operand has 11 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 6 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-10-17 17:38:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:01,709 INFO L93 Difference]: Finished difference Result 7909 states and 13086 transitions. [2022-10-17 17:38:01,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-10-17 17:38:01,710 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 6 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 73 [2022-10-17 17:38:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:01,755 INFO L225 Difference]: With dead ends: 7909 [2022-10-17 17:38:01,755 INFO L226 Difference]: Without dead ends: 4877 [2022-10-17 17:38:01,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2022-10-17 17:38:01,782 INFO L413 NwaCegarLoop]: 817 mSDtfsCounter, 2033 mSDsluCounter, 2940 mSDsCounter, 0 mSdLazyCounter, 5248 mSolverCounterSat, 1164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2051 SdHoareTripleChecker+Valid, 3577 SdHoareTripleChecker+Invalid, 6412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1164 IncrementalHoareTripleChecker+Valid, 5248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:01,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2051 Valid, 3577 Invalid, 6412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1164 Valid, 5248 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-10-17 17:38:01,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4877 states. [2022-10-17 17:38:02,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4877 to 4619. [2022-10-17 17:38:02,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4619 states, 3236 states have (on average 1.5454264524103831) internal successors, (5001), 3417 states have internal predecessors, (5001), 1118 states have call successors, (1118), 204 states have call predecessors, (1118), 264 states have return successors, (1254), 1074 states have call predecessors, (1254), 1113 states have call successors, (1254) [2022-10-17 17:38:02,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4619 states to 4619 states and 7373 transitions. [2022-10-17 17:38:02,357 INFO L78 Accepts]: Start accepts. Automaton has 4619 states and 7373 transitions. Word has length 73 [2022-10-17 17:38:02,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:02,358 INFO L495 AbstractCegarLoop]: Abstraction has 4619 states and 7373 transitions. [2022-10-17 17:38:02,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 6 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-10-17 17:38:02,359 INFO L276 IsEmpty]: Start isEmpty. Operand 4619 states and 7373 transitions. [2022-10-17 17:38:02,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-10-17 17:38:02,362 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:02,362 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 17:38:02,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:38:02,363 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:02,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:02,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1566716254, now seen corresponding path program 1 times [2022-10-17 17:38:02,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:02,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664190476] [2022-10-17 17:38:02,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:02,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:38:02,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:02,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664190476] [2022-10-17 17:38:02,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664190476] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:02,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:02,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:38:02,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032825583] [2022-10-17 17:38:02,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:02,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:38:02,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:02,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:38:02,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:38:02,739 INFO L87 Difference]: Start difference. First operand 4619 states and 7373 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-10-17 17:38:04,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:04,976 INFO L93 Difference]: Finished difference Result 9164 states and 14665 transitions. [2022-10-17 17:38:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 17:38:04,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2022-10-17 17:38:04,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:05,028 INFO L225 Difference]: With dead ends: 9164 [2022-10-17 17:38:05,029 INFO L226 Difference]: Without dead ends: 5167 [2022-10-17 17:38:05,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:38:05,058 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 910 mSDsluCounter, 1306 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 2497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:05,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 1797 Invalid, 2497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 2110 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-10-17 17:38:05,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5167 states. [2022-10-17 17:38:05,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5167 to 4709. [2022-10-17 17:38:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4709 states, 3296 states have (on average 1.539745145631068) internal successors, (5075), 3491 states have internal predecessors, (5075), 1120 states have call successors, (1120), 220 states have call predecessors, (1120), 292 states have return successors, (1292), 1074 states have call predecessors, (1292), 1115 states have call successors, (1292) [2022-10-17 17:38:05,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4709 states to 4709 states and 7487 transitions. [2022-10-17 17:38:05,580 INFO L78 Accepts]: Start accepts. Automaton has 4709 states and 7487 transitions. Word has length 75 [2022-10-17 17:38:05,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:05,580 INFO L495 AbstractCegarLoop]: Abstraction has 4709 states and 7487 transitions. [2022-10-17 17:38:05,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-10-17 17:38:05,581 INFO L276 IsEmpty]: Start isEmpty. Operand 4709 states and 7487 transitions. [2022-10-17 17:38:05,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-10-17 17:38:05,584 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:05,584 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:05,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:38:05,585 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:05,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:05,586 INFO L85 PathProgramCache]: Analyzing trace with hash 600401345, now seen corresponding path program 1 times [2022-10-17 17:38:05,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:05,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323257693] [2022-10-17 17:38:05,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:05,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:38:05,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:05,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323257693] [2022-10-17 17:38:05,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323257693] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:05,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:05,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:38:05,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435835128] [2022-10-17 17:38:05,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:05,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:38:05,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:05,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:38:05,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:38:05,949 INFO L87 Difference]: Start difference. First operand 4709 states and 7487 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-10-17 17:38:06,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:06,860 INFO L93 Difference]: Finished difference Result 4811 states and 7653 transitions. [2022-10-17 17:38:06,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:38:06,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 79 [2022-10-17 17:38:06,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:06,901 INFO L225 Difference]: With dead ends: 4811 [2022-10-17 17:38:06,902 INFO L226 Difference]: Without dead ends: 4796 [2022-10-17 17:38:06,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:38:06,907 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 615 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:06,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 1704 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:38:06,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4796 states. [2022-10-17 17:38:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4796 to 4715. [2022-10-17 17:38:07,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4715 states, 3302 states have (on average 1.5387643852210782) internal successors, (5081), 3497 states have internal predecessors, (5081), 1120 states have call successors, (1120), 220 states have call predecessors, (1120), 292 states have return successors, (1292), 1074 states have call predecessors, (1292), 1115 states have call successors, (1292) [2022-10-17 17:38:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4715 states to 4715 states and 7493 transitions. [2022-10-17 17:38:07,468 INFO L78 Accepts]: Start accepts. Automaton has 4715 states and 7493 transitions. Word has length 79 [2022-10-17 17:38:07,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:07,469 INFO L495 AbstractCegarLoop]: Abstraction has 4715 states and 7493 transitions. [2022-10-17 17:38:07,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-10-17 17:38:07,469 INFO L276 IsEmpty]: Start isEmpty. Operand 4715 states and 7493 transitions. [2022-10-17 17:38:07,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-10-17 17:38:07,472 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:07,472 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:07,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 17:38:07,473 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:07,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:07,474 INFO L85 PathProgramCache]: Analyzing trace with hash 731164389, now seen corresponding path program 1 times [2022-10-17 17:38:07,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:07,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947941702] [2022-10-17 17:38:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:07,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:38:07,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:07,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947941702] [2022-10-17 17:38:07,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947941702] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:07,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:07,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-10-17 17:38:07,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825693044] [2022-10-17 17:38:07,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:07,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-17 17:38:07,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:07,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-17 17:38:07,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-10-17 17:38:07,993 INFO L87 Difference]: Start difference. First operand 4715 states and 7493 transitions. Second operand has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14)