./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS --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 d29c49d66a80c5cce6b00f5730e0d825d56678e7df63108e14ba577a66cb87d7 --- 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-8393723 [2022-11-19 07:48:05,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:48:05,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:48:05,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:48:05,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:48:05,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:48:05,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:48:05,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:48:05,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:48:05,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:48:05,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:48:05,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:48:05,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:48:05,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:48:05,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:48:05,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:48:05,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:48:05,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:48:05,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:48:05,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:48:05,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:48:05,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:48:05,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:48:05,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:48:05,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:48:05,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:48:05,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:48:05,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:48:05,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:48:05,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:48:05,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:48:05,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:48:05,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:48:05,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:48:05,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:48:05,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:48:05,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:48:05,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:48:05,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:48:05,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:48:05,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:48:05,959 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:48:05,992 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:48:05,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:48:05,993 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:48:05,993 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:48:05,994 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:48:05,994 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:48:05,994 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:48:05,995 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:48:05,995 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:48:05,995 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:48:05,995 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:48:05,996 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:48:05,996 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:48:05,996 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:48:05,996 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:48:05,997 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:48:05,997 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:48:05,997 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:48:05,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:48:05,998 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:48:05,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:48:05,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:48:05,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:48:06,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:48:06,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:48:06,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:48:06,000 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:48:06,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:48:06,001 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:48:06,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:48:06,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:48:06,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:48:06,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:48:06,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:48:06,002 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:48:06,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:48:06,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:48:06,003 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:48:06,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:48:06,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:48:06,004 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:48:06,004 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_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d29c49d66a80c5cce6b00f5730e0d825d56678e7df63108e14ba577a66cb87d7 [2022-11-19 07:48:06,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:48:06,376 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:48:06,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:48:06,385 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:48:06,386 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:48:06,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c [2022-11-19 07:48:06,484 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/data/7d4184f37/2a83196ad95b46d88d4fe7c67bc76f05/FLAGd877f3605 [2022-11-19 07:48:07,175 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:48:07,176 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c [2022-11-19 07:48:07,214 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/data/7d4184f37/2a83196ad95b46d88d4fe7c67bc76f05/FLAGd877f3605 [2022-11-19 07:48:07,377 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/data/7d4184f37/2a83196ad95b46d88d4fe7c67bc76f05 [2022-11-19 07:48:07,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:48:07,381 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:48:07,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:48:07,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:48:07,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:48:07,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:07" (1/1) ... [2022-11-19 07:48:07,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46986a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:07, skipping insertion in model container [2022-11-19 07:48:07,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:07" (1/1) ... [2022-11-19 07:48:07,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:48:07,513 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:48:07,741 WARN L234 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_1c312f38-4395-406f-a591-ab38f3eb5078/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c[4316,4329] [2022-11-19 07:48:08,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:48:08,167 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:48:08,200 WARN L234 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_1c312f38-4395-406f-a591-ab38f3eb5078/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c[4316,4329] [2022-11-19 07:48:08,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:48:08,325 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:48:08,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:08 WrapperNode [2022-11-19 07:48:08,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:48:08,327 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:48:08,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:48:08,327 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:48:08,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:08" (1/1) ... [2022-11-19 07:48:08,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:08" (1/1) ... [2022-11-19 07:48:08,460 INFO L138 Inliner]: procedures = 99, calls = 356, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 970 [2022-11-19 07:48:08,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:48:08,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:48:08,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:48:08,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:48:08,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:08" (1/1) ... [2022-11-19 07:48:08,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:08" (1/1) ... [2022-11-19 07:48:08,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:08" (1/1) ... [2022-11-19 07:48:08,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:08" (1/1) ... [2022-11-19 07:48:08,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:08" (1/1) ... [2022-11-19 07:48:08,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:08" (1/1) ... [2022-11-19 07:48:08,516 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:08" (1/1) ... [2022-11-19 07:48:08,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:08" (1/1) ... [2022-11-19 07:48:08,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:48:08,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:48:08,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:48:08,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:48:08,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:08" (1/1) ... [2022-11-19 07:48:08,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:48:08,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:08,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:48:08,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:48:08,644 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-19 07:48:08,645 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-19 07:48:08,645 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-19 07:48:08,645 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-19 07:48:08,645 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-19 07:48:08,645 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-19 07:48:08,645 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-19 07:48:08,646 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-19 07:48:08,646 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-19 07:48:08,646 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-19 07:48:08,646 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-19 07:48:08,646 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-19 07:48:08,647 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-19 07:48:08,647 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-19 07:48:08,647 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-19 07:48:08,648 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-19 07:48:08,648 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-19 07:48:08,648 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-19 07:48:08,648 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-19 07:48:08,649 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-19 07:48:08,649 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-19 07:48:08,649 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-19 07:48:08,649 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-19 07:48:08,649 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-19 07:48:08,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:48:08,650 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-19 07:48:08,650 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-19 07:48:08,650 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-19 07:48:08,651 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-19 07:48:08,651 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-19 07:48:08,652 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-19 07:48:08,653 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-19 07:48:08,653 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-19 07:48:08,653 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-19 07:48:08,654 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-19 07:48:08,654 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-19 07:48:08,654 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-19 07:48:08,654 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-19 07:48:08,654 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-19 07:48:08,654 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-19 07:48:08,655 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-19 07:48:08,655 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-19 07:48:08,655 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-19 07:48:08,656 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-19 07:48:08,656 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-19 07:48:08,657 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-19 07:48:08,657 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-19 07:48:08,658 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-19 07:48:08,658 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-19 07:48:08,659 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-19 07:48:08,659 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-19 07:48:08,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:48:08,660 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-19 07:48:08,660 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-19 07:48:08,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:48:08,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:48:08,661 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-19 07:48:08,661 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-19 07:48:08,661 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-19 07:48:08,661 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-19 07:48:08,859 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:48:08,877 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:48:10,179 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:48:11,125 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:48:11,126 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:48:11,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:11 BoogieIcfgContainer [2022-11-19 07:48:11,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:48:11,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:48:11,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:48:11,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:48:11,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:48:07" (1/3) ... [2022-11-19 07:48:11,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba3c109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:11, skipping insertion in model container [2022-11-19 07:48:11,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:08" (2/3) ... [2022-11-19 07:48:11,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba3c109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:11, skipping insertion in model container [2022-11-19 07:48:11,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:11" (3/3) ... [2022-11-19 07:48:11,143 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product32.cil.c [2022-11-19 07:48:11,165 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:48:11,165 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:48:11,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:48:11,279 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;@62fe5775, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:48:11,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:48:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 413 states, 275 states have (on average 1.5672727272727274) internal successors, (431), 298 states have internal predecessors, (431), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-19 07:48:11,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 07:48:11,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:11,308 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:11,308 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:11,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:11,315 INFO L85 PathProgramCache]: Analyzing trace with hash 990529142, now seen corresponding path program 1 times [2022-11-19 07:48:11,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:11,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110577338] [2022-11-19 07:48:11,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:11,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:11,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:12,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:48:12,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:12,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110577338] [2022-11-19 07:48:12,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110577338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:12,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:12,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:48:12,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219785090] [2022-11-19 07:48:12,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:12,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:48:12,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:12,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:48:12,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:48:12,530 INFO L87 Difference]: Start difference. First operand has 413 states, 275 states have (on average 1.5672727272727274) internal successors, (431), 298 states have internal predecessors, (431), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-19 07:48:15,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:15,474 INFO L93 Difference]: Finished difference Result 1329 states and 2129 transitions. [2022-11-19 07:48:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:48:15,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2022-11-19 07:48:15,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:15,512 INFO L225 Difference]: With dead ends: 1329 [2022-11-19 07:48:15,513 INFO L226 Difference]: Without dead ends: 933 [2022-11-19 07:48:15,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:48:15,525 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 1702 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1776 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:15,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1776 Valid, 996 Invalid, 2350 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [666 Valid, 1684 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-19 07:48:15,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2022-11-19 07:48:15,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 846. [2022-11-19 07:48:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 589 states have (on average 1.5823429541595926) internal successors, (932), 619 states have internal predecessors, (932), 207 states have call successors, (207), 48 states have call predecessors, (207), 49 states have return successors, (209), 191 states have call predecessors, (209), 202 states have call successors, (209) [2022-11-19 07:48:15,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1348 transitions. [2022-11-19 07:48:15,725 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1348 transitions. Word has length 54 [2022-11-19 07:48:15,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:15,726 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1348 transitions. [2022-11-19 07:48:15,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-19 07:48:15,726 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1348 transitions. [2022-11-19 07:48:15,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-19 07:48:15,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:15,742 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:15,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:48:15,743 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:15,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:15,744 INFO L85 PathProgramCache]: Analyzing trace with hash 90202237, now seen corresponding path program 1 times [2022-11-19 07:48:15,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:15,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638659279] [2022-11-19 07:48:15,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:15,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:48:16,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:16,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638659279] [2022-11-19 07:48:16,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638659279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:16,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:16,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:48:16,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923060329] [2022-11-19 07:48:16,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:16,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:48:16,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:16,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:48:16,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:48:16,414 INFO L87 Difference]: Start difference. First operand 846 states and 1348 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-19 07:48:19,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:19,275 INFO L93 Difference]: Finished difference Result 2624 states and 4232 transitions. [2022-11-19 07:48:19,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:48:19,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 99 [2022-11-19 07:48:19,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:19,294 INFO L225 Difference]: With dead ends: 2624 [2022-11-19 07:48:19,294 INFO L226 Difference]: Without dead ends: 1802 [2022-11-19 07:48:19,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:48:19,302 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 1229 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 2757 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 3228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 2757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:19,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1312 Valid, 1665 Invalid, 3228 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [471 Valid, 2757 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-19 07:48:19,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-11-19 07:48:19,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1715. [2022-11-19 07:48:19,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1206 states have (on average 1.5887230514096187) internal successors, (1916), 1262 states have internal predecessors, (1916), 409 states have call successors, (409), 92 states have call predecessors, (409), 99 states have return successors, (436), 384 states have call predecessors, (436), 404 states have call successors, (436) [2022-11-19 07:48:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 2761 transitions. [2022-11-19 07:48:19,445 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 2761 transitions. Word has length 99 [2022-11-19 07:48:19,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:19,446 INFO L495 AbstractCegarLoop]: Abstraction has 1715 states and 2761 transitions. [2022-11-19 07:48:19,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-19 07:48:19,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 2761 transitions. [2022-11-19 07:48:19,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 07:48:19,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:19,451 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:19,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:48:19,452 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:19,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:19,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1398610745, now seen corresponding path program 1 times [2022-11-19 07:48:19,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:19,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185053552] [2022-11-19 07:48:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:19,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:20,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:48:20,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:20,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185053552] [2022-11-19 07:48:20,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185053552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:20,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:20,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 07:48:20,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724033801] [2022-11-19 07:48:20,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:20,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:48:20,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:20,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:48:20,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:48:20,143 INFO L87 Difference]: Start difference. First operand 1715 states and 2761 transitions. Second operand has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-19 07:48:24,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:24,233 INFO L93 Difference]: Finished difference Result 4328 states and 6952 transitions. [2022-11-19 07:48:24,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:48:24,234 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) Word has length 102 [2022-11-19 07:48:24,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:24,251 INFO L225 Difference]: With dead ends: 4328 [2022-11-19 07:48:24,251 INFO L226 Difference]: Without dead ends: 2636 [2022-11-19 07:48:24,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:48:24,262 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 1065 mSDsluCounter, 2239 mSDsCounter, 0 mSdLazyCounter, 5385 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 2833 SdHoareTripleChecker+Invalid, 5819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 5385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:24,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1139 Valid, 2833 Invalid, 5819 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [434 Valid, 5385 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-19 07:48:24,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2022-11-19 07:48:24,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2553. [2022-11-19 07:48:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 1780 states have (on average 1.5719101123595505) internal successors, (2798), 1858 states have internal predecessors, (2798), 615 states have call successors, (615), 138 states have call predecessors, (615), 157 states have return successors, (660), 589 states have call predecessors, (660), 610 states have call successors, (660) [2022-11-19 07:48:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 4073 transitions. [2022-11-19 07:48:24,455 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 4073 transitions. Word has length 102 [2022-11-19 07:48:24,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:24,456 INFO L495 AbstractCegarLoop]: Abstraction has 2553 states and 4073 transitions. [2022-11-19 07:48:24,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-19 07:48:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 4073 transitions. [2022-11-19 07:48:24,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-19 07:48:24,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:24,464 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:24,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:48:24,465 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:24,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:24,466 INFO L85 PathProgramCache]: Analyzing trace with hash 521894974, now seen corresponding path program 1 times [2022-11-19 07:48:24,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:24,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192641154] [2022-11-19 07:48:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:24,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:48:24,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:24,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192641154] [2022-11-19 07:48:24,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192641154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:24,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:24,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:48:24,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90372005] [2022-11-19 07:48:24,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:24,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:48:24,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:24,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:48:24,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:48:24,871 INFO L87 Difference]: Start difference. First operand 2553 states and 4073 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-19 07:48:25,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:25,808 INFO L93 Difference]: Finished difference Result 2654 states and 4241 transitions. [2022-11-19 07:48:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:48:25,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 103 [2022-11-19 07:48:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:25,829 INFO L225 Difference]: With dead ends: 2654 [2022-11-19 07:48:25,829 INFO L226 Difference]: Without dead ends: 2639 [2022-11-19 07:48:25,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:48:25,833 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 729 mSDsluCounter, 1366 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1964 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:25,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 1964 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:48:25,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2022-11-19 07:48:26,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2559. [2022-11-19 07:48:26,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 1786 states have (on average 1.5699888017917134) internal successors, (2804), 1864 states have internal predecessors, (2804), 615 states have call successors, (615), 138 states have call predecessors, (615), 157 states have return successors, (660), 589 states have call predecessors, (660), 610 states have call successors, (660) [2022-11-19 07:48:26,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 4079 transitions. [2022-11-19 07:48:26,066 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 4079 transitions. Word has length 103 [2022-11-19 07:48:26,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:26,069 INFO L495 AbstractCegarLoop]: Abstraction has 2559 states and 4079 transitions. [2022-11-19 07:48:26,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-19 07:48:26,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 4079 transitions. [2022-11-19 07:48:26,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-19 07:48:26,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:26,075 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:26,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:48:26,077 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:26,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:26,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1761517624, now seen corresponding path program 1 times [2022-11-19 07:48:26,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:26,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089729859] [2022-11-19 07:48:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:26,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:48:26,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:26,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089729859] [2022-11-19 07:48:26,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089729859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:26,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:48:26,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:48:26,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556315307] [2022-11-19 07:48:26,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:26,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:48:26,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:26,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:48:26,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:48:26,533 INFO L87 Difference]: Start difference. First operand 2559 states and 4079 transitions. Second operand has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-19 07:48:27,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:27,300 INFO L93 Difference]: Finished difference Result 2704 states and 4284 transitions. [2022-11-19 07:48:27,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:48:27,301 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) Word has length 108 [2022-11-19 07:48:27,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:27,322 INFO L225 Difference]: With dead ends: 2704 [2022-11-19 07:48:27,322 INFO L226 Difference]: Without dead ends: 2689 [2022-11-19 07:48:27,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:48:27,330 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 662 mSDsluCounter, 2317 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 2926 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:27,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 2926 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:48:27,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2689 states. [2022-11-19 07:48:27,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2689 to 2635. [2022-11-19 07:48:27,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 1838 states have (on average 1.5625680087051144) internal successors, (2872), 1916 states have internal predecessors, (2872), 631 states have call successors, (631), 146 states have call predecessors, (631), 165 states have return successors, (686), 605 states have call predecessors, (686), 626 states have call successors, (686) [2022-11-19 07:48:27,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 4189 transitions. [2022-11-19 07:48:27,602 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 4189 transitions. Word has length 108 [2022-11-19 07:48:27,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:27,602 INFO L495 AbstractCegarLoop]: Abstraction has 2635 states and 4189 transitions. [2022-11-19 07:48:27,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-19 07:48:27,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 4189 transitions. [2022-11-19 07:48:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 07:48:27,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:27,606 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:27,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:48:27,607 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:27,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:27,607 INFO L85 PathProgramCache]: Analyzing trace with hash 675354164, now seen corresponding path program 1 times [2022-11-19 07:48:27,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:27,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619550445] [2022-11-19 07:48:27,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:27,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:48:32,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:32,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619550445] [2022-11-19 07:48:32,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619550445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:48:32,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24210173] [2022-11-19 07:48:32,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:32,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:32,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:32,390 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:32,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:48:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:32,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 2087 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:48:32,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:48:33,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:48:33,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24210173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:48:33,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:48:33,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [23] total 25 [2022-11-19 07:48:33,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489590153] [2022-11-19 07:48:33,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:48:33,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:48:33,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:33,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:48:33,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2022-11-19 07:48:33,101 INFO L87 Difference]: Start difference. First operand 2635 states and 4189 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-19 07:48:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:33,548 INFO L93 Difference]: Finished difference Result 2795 states and 4460 transitions. [2022-11-19 07:48:33,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:48:33,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 115 [2022-11-19 07:48:33,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:33,567 INFO L225 Difference]: With dead ends: 2795 [2022-11-19 07:48:33,568 INFO L226 Difference]: Without dead ends: 2780 [2022-11-19 07:48:33,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:48:33,574 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 47 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1853 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:33,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1853 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:48:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2022-11-19 07:48:33,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 2651. [2022-11-19 07:48:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2651 states, 1854 states have (on average 1.557713052858684) internal successors, (2888), 1932 states have internal predecessors, (2888), 631 states have call successors, (631), 146 states have call predecessors, (631), 165 states have return successors, (686), 605 states have call predecessors, (686), 626 states have call successors, (686) [2022-11-19 07:48:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 4205 transitions. [2022-11-19 07:48:33,885 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 4205 transitions. Word has length 115 [2022-11-19 07:48:33,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:33,886 INFO L495 AbstractCegarLoop]: Abstraction has 2651 states and 4205 transitions. [2022-11-19 07:48:33,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-19 07:48:33,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 4205 transitions. [2022-11-19 07:48:33,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-19 07:48:33,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:33,894 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:33,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:34,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:34,106 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:48:34,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:34,109 INFO L85 PathProgramCache]: Analyzing trace with hash 110156208, now seen corresponding path program 1 times [2022-11-19 07:48:34,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:34,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83111103] [2022-11-19 07:48:34,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:34,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-19 07:48:35,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:35,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83111103] [2022-11-19 07:48:35,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83111103] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:48:35,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381673541] [2022-11-19 07:48:35,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:35,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:35,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:35,928 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:35,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c312f38-4395-406f-a591-ab38f3eb5078/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:48:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:36,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-19 07:48:36,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:48:37,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:49:30,097 WARN L233 SmtUtils]: Spent 50.50s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-19 07:50:19,882 WARN L233 SmtUtils]: Spent 49.17s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-19 07:50:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-19 07:50:20,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381673541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:50:20,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [445717007] [2022-11-19 07:50:20,637 INFO L159 IcfgInterpreter]: Started Sifa with 115 locations of interest [2022-11-19 07:50:20,637 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:50:20,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:50:20,647 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:50:20,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:50:28,548 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 451 for LOIs [2022-11-19 07:50:28,628 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 594 for LOIs [2022-11-19 07:50:37,056 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 594 for LOIs [2022-11-19 07:50:41,440 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 578 for LOIs [2022-11-19 07:50:50,937 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 453 for LOIs [2022-11-19 07:50:53,039 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 509 for LOIs [2022-11-19 07:50:55,148 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 59 for LOIs [2022-11-19 07:50:55,162 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 445 for LOIs [2022-11-19 07:50:55,230 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 81 for LOIs [2022-11-19 07:50:55,240 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 599 for LOIs [2022-11-19 07:50:58,879 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 428 for LOIs [2022-11-19 07:50:58,948 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 459 for LOIs [2022-11-19 07:50:59,853 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 455 for LOIs [2022-11-19 07:50:59,926 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 562 for LOIs [2022-11-19 07:51:02,527 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 841 for LOIs