./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7 --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 8e3e095c3e35754b69c5b770f69d2f55696576eebdd6e61f09ab7280f663a93f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:31:24,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:31:24,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:31:25,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:31:25,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:31:25,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:31:25,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:31:25,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:31:25,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:31:25,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:31:25,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:31:25,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:31:25,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:31:25,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:31:25,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:31:25,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:31:25,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:31:25,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:31:25,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:31:25,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:31:25,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:31:25,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:31:25,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:31:25,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:31:25,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:31:25,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:31:25,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:31:25,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:31:25,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:31:25,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:31:25,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:31:25,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:31:25,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:31:25,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:31:25,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:31:25,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:31:25,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:31:25,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:31:25,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:31:25,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:31:25,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:31:25,099 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:31:25,149 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:31:25,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:31:25,150 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:31:25,150 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:31:25,157 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:31:25,157 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:31:25,157 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:31:25,158 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:31:25,158 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:31:25,158 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:31:25,159 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:31:25,159 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:31:25,160 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:31:25,160 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:31:25,160 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:31:25,160 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:31:25,161 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:31:25,161 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:31:25,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:31:25,162 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:31:25,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:31:25,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:31:25,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:31:25,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:31:25,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:31:25,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:31:25,165 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:31:25,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:31:25,165 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:31:25,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:31:25,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:31:25,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:31:25,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:31:25,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:31:25,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:31:25,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:31:25,167 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:31:25,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:31:25,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:31:25,168 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:31:25,168 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:31:25,169 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e3e095c3e35754b69c5b770f69d2f55696576eebdd6e61f09ab7280f663a93f [2021-11-25 20:31:25,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:31:25,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:31:25,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:31:25,459 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:31:25,459 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:31:25,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c [2021-11-25 20:31:25,548 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/data/96fab0fdb/7b98e34a634d403095c34a432ab0aa9c/FLAG83a4deb1d [2021-11-25 20:31:26,223 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:31:26,224 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c [2021-11-25 20:31:26,257 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/data/96fab0fdb/7b98e34a634d403095c34a432ab0aa9c/FLAG83a4deb1d [2021-11-25 20:31:26,387 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/data/96fab0fdb/7b98e34a634d403095c34a432ab0aa9c [2021-11-25 20:31:26,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:31:26,393 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:31:26,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:31:26,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:31:26,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:31:26,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:31:26" (1/1) ... [2021-11-25 20:31:26,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4701bbcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:26, skipping insertion in model container [2021-11-25 20:31:26,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:31:26" (1/1) ... [2021-11-25 20:31:26,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:31:26,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:31:26,768 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_fd4158de-b682-4af2-a815-c1c86f8a27e5/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c[8585,8598] [2021-11-25 20:31:27,033 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:31:27,042 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:31:27,071 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_fd4158de-b682-4af2-a815-c1c86f8a27e5/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c[8585,8598] [2021-11-25 20:31:27,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:31:27,199 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:31:27,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:27 WrapperNode [2021-11-25 20:31:27,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:31:27,201 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:31:27,201 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:31:27,201 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:31:27,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:27" (1/1) ... [2021-11-25 20:31:27,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:27" (1/1) ... [2021-11-25 20:31:27,342 INFO L137 Inliner]: procedures = 93, calls = 340, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 854 [2021-11-25 20:31:27,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:31:27,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:31:27,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:31:27,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:31:27,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:27" (1/1) ... [2021-11-25 20:31:27,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:27" (1/1) ... [2021-11-25 20:31:27,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:27" (1/1) ... [2021-11-25 20:31:27,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:27" (1/1) ... [2021-11-25 20:31:27,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:27" (1/1) ... [2021-11-25 20:31:27,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:27" (1/1) ... [2021-11-25 20:31:27,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:27" (1/1) ... [2021-11-25 20:31:27,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:31:27,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:31:27,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:31:27,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:31:27,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:27" (1/1) ... [2021-11-25 20:31:27,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:31:27,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:27,499 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:31:27,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:31:27,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:31:27,550 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-25 20:31:27,551 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-25 20:31:27,551 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 20:31:27,551 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 20:31:27,551 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-25 20:31:27,551 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-25 20:31:27,552 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 20:31:27,552 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 20:31:27,552 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-25 20:31:27,552 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-25 20:31:27,552 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 20:31:27,553 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 20:31:27,553 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-25 20:31:27,553 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-25 20:31:27,553 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 20:31:27,554 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 20:31:27,554 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 20:31:27,554 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 20:31:27,554 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 20:31:27,554 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 20:31:27,555 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 20:31:27,555 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 20:31:27,555 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 20:31:27,555 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 20:31:27,555 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 20:31:27,556 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 20:31:27,556 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 20:31:27,556 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 20:31:27,557 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 20:31:27,557 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 20:31:27,559 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 20:31:27,559 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 20:31:27,559 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 20:31:27,559 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 20:31:27,559 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 20:31:27,560 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 20:31:27,560 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 20:31:27,560 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 20:31:27,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:31:27,560 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-25 20:31:27,561 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-25 20:31:27,562 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 20:31:27,562 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 20:31:27,562 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 20:31:27,563 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 20:31:27,563 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 20:31:27,564 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 20:31:27,565 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-25 20:31:27,565 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-25 20:31:27,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:31:27,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:31:27,566 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 20:31:27,566 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 20:31:27,708 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:31:27,710 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:31:28,884 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:31:29,485 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:31:29,485 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:31:29,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:31:29 BoogieIcfgContainer [2021-11-25 20:31:29,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:31:29,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:31:29,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:31:29,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:31:29,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:31:26" (1/3) ... [2021-11-25 20:31:29,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69902c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:31:29, skipping insertion in model container [2021-11-25 20:31:29,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:27" (2/3) ... [2021-11-25 20:31:29,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69902c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:31:29, skipping insertion in model container [2021-11-25 20:31:29,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:31:29" (3/3) ... [2021-11-25 20:31:29,497 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product23.cil.c [2021-11-25 20:31:29,502 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:31:29,502 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:31:29,574 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:31:29,582 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:31:29,583 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:31:29,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 376 states, 250 states have (on average 1.552) internal successors, (388), 266 states have internal predecessors, (388), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 97 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-25 20:31:29,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 20:31:29,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:29,699 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:29,700 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:29,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:29,710 INFO L85 PathProgramCache]: Analyzing trace with hash 748043871, now seen corresponding path program 1 times [2021-11-25 20:31:29,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:29,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458063989] [2021-11-25 20:31:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:29,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 20:31:30,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:30,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458063989] [2021-11-25 20:31:30,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458063989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:30,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:30,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:30,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095235352] [2021-11-25 20:31:30,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:30,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:30,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:30,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:30,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:30,346 INFO L87 Difference]: Start difference. First operand has 376 states, 250 states have (on average 1.552) internal successors, (388), 266 states have internal predecessors, (388), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 97 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-25 20:31:31,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:31,183 INFO L93 Difference]: Finished difference Result 1106 states and 1750 transitions. [2021-11-25 20:31:31,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:31:31,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2021-11-25 20:31:31,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:31,216 INFO L225 Difference]: With dead ends: 1106 [2021-11-25 20:31:31,217 INFO L226 Difference]: Without dead ends: 731 [2021-11-25 20:31:31,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:31:31,234 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 561 mSDsluCounter, 1852 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 2428 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:31,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 2428 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:31:31,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-11-25 20:31:31,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 725. [2021-11-25 20:31:31,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 485 states have (on average 1.5422680412371135) internal successors, (748), 514 states have internal predecessors, (748), 192 states have call successors, (192), 49 states have call predecessors, (192), 47 states have return successors, (198), 186 states have call predecessors, (198), 190 states have call successors, (198) [2021-11-25 20:31:31,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1138 transitions. [2021-11-25 20:31:31,406 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1138 transitions. Word has length 73 [2021-11-25 20:31:31,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:31,407 INFO L470 AbstractCegarLoop]: Abstraction has 725 states and 1138 transitions. [2021-11-25 20:31:31,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-25 20:31:31,408 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1138 transitions. [2021-11-25 20:31:31,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 20:31:31,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:31,418 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:31:31,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:31:31,419 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:31,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:31,420 INFO L85 PathProgramCache]: Analyzing trace with hash 143298496, now seen corresponding path program 1 times [2021-11-25 20:31:31,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:31,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605300015] [2021-11-25 20:31:31,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:31,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 20:31:31,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:31,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605300015] [2021-11-25 20:31:31,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605300015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:31,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:31,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:31,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482920961] [2021-11-25 20:31:31,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:31,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:31,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:31,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:31,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:31,679 INFO L87 Difference]: Start difference. First operand 725 states and 1138 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 20:31:32,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:32,428 INFO L93 Difference]: Finished difference Result 834 states and 1301 transitions. [2021-11-25 20:31:32,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:31:32,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 77 [2021-11-25 20:31:32,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:32,446 INFO L225 Difference]: With dead ends: 834 [2021-11-25 20:31:32,446 INFO L226 Difference]: Without dead ends: 832 [2021-11-25 20:31:32,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:31:32,453 INFO L933 BasicCegarLoop]: 673 mSDtfsCounter, 684 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:32,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 1740 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:31:32,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-11-25 20:31:32,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 822. [2021-11-25 20:31:32,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 544 states have (on average 1.5091911764705883) internal successors, (821), 573 states have internal predecessors, (821), 217 states have call successors, (217), 63 states have call predecessors, (217), 60 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2021-11-25 20:31:32,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1267 transitions. [2021-11-25 20:31:32,561 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1267 transitions. Word has length 77 [2021-11-25 20:31:32,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:32,565 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 1267 transitions. [2021-11-25 20:31:32,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 20:31:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1267 transitions. [2021-11-25 20:31:32,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-25 20:31:32,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:32,576 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2021-11-25 20:31:32,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:31:32,577 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:32,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:32,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1765573228, now seen corresponding path program 1 times [2021-11-25 20:31:32,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:32,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092305895] [2021-11-25 20:31:32,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:32,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-25 20:31:32,760 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:32,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092305895] [2021-11-25 20:31:32,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092305895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:32,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:32,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:31:32,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701191370] [2021-11-25 20:31:32,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:32,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:31:32,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:32,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:31:32,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:31:32,763 INFO L87 Difference]: Start difference. First operand 822 states and 1267 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-25 20:31:32,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:32,941 INFO L93 Difference]: Finished difference Result 1670 states and 2603 transitions. [2021-11-25 20:31:32,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:31:32,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 108 [2021-11-25 20:31:32,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:32,949 INFO L225 Difference]: With dead ends: 1670 [2021-11-25 20:31:32,949 INFO L226 Difference]: Without dead ends: 860 [2021-11-25 20:31:32,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:32,958 INFO L933 BasicCegarLoop]: 554 mSDtfsCounter, 54 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:32,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1621 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:31:32,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-11-25 20:31:33,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 826. [2021-11-25 20:31:33,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 548 states have (on average 1.5054744525547445) internal successors, (825), 577 states have internal predecessors, (825), 217 states have call successors, (217), 63 states have call predecessors, (217), 60 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2021-11-25 20:31:33,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1271 transitions. [2021-11-25 20:31:33,021 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1271 transitions. Word has length 108 [2021-11-25 20:31:33,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:33,022 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1271 transitions. [2021-11-25 20:31:33,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-25 20:31:33,022 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1271 transitions. [2021-11-25 20:31:33,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-25 20:31:33,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:33,028 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 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] [2021-11-25 20:31:33,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:31:33,028 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:33,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:33,029 INFO L85 PathProgramCache]: Analyzing trace with hash -2003910482, now seen corresponding path program 1 times [2021-11-25 20:31:33,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:33,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793314128] [2021-11-25 20:31:33,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:33,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-25 20:31:33,241 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:33,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793314128] [2021-11-25 20:31:33,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793314128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:33,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50460785] [2021-11-25 20:31:33,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:33,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:33,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:33,245 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:33,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:31:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:33,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:31:33,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-25 20:31:33,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:33,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50460785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:33,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:31:33,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 14 [2021-11-25 20:31:33,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116084669] [2021-11-25 20:31:33,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:33,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:31:33,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:33,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:31:33,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:31:33,891 INFO L87 Difference]: Start difference. First operand 826 states and 1271 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:31:34,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:34,204 INFO L93 Difference]: Finished difference Result 1718 states and 2692 transitions. [2021-11-25 20:31:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:31:34,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 115 [2021-11-25 20:31:34,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:34,218 INFO L225 Difference]: With dead ends: 1718 [2021-11-25 20:31:34,218 INFO L226 Difference]: Without dead ends: 904 [2021-11-25 20:31:34,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:31:34,237 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 213 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:34,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1395 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:31:34,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-11-25 20:31:34,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 904. [2021-11-25 20:31:34,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 624 states have (on average 1.5560897435897436) internal successors, (971), 653 states have internal predecessors, (971), 217 states have call successors, (217), 65 states have call predecessors, (217), 62 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2021-11-25 20:31:34,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1417 transitions. [2021-11-25 20:31:34,302 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1417 transitions. Word has length 115 [2021-11-25 20:31:34,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:34,304 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 1417 transitions. [2021-11-25 20:31:34,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:31:34,305 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1417 transitions. [2021-11-25 20:31:34,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-25 20:31:34,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:34,310 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 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] [2021-11-25 20:31:34,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:34,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:34,526 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:34,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:34,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1165079662, now seen corresponding path program 1 times [2021-11-25 20:31:34,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:34,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474660623] [2021-11-25 20:31:34,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:34,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-25 20:31:34,632 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:34,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474660623] [2021-11-25 20:31:34,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474660623] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:34,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399162855] [2021-11-25 20:31:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:34,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:34,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:34,651 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:34,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:31:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:34,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1302 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:31:34,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 20:31:35,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:35,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399162855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:35,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:31:35,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 20:31:35,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114844054] [2021-11-25 20:31:35,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:35,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:31:35,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:35,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:31:35,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:31:35,199 INFO L87 Difference]: Start difference. First operand 904 states and 1417 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:31:35,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:35,505 INFO L93 Difference]: Finished difference Result 1874 states and 2982 transitions. [2021-11-25 20:31:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:31:35,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 120 [2021-11-25 20:31:35,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:35,515 INFO L225 Difference]: With dead ends: 1874 [2021-11-25 20:31:35,515 INFO L226 Difference]: Without dead ends: 982 [2021-11-25 20:31:35,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:31:35,524 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 211 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:35,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1395 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:31:35,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-11-25 20:31:35,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 982. [2021-11-25 20:31:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 700 states have (on average 1.5957142857142856) internal successors, (1117), 729 states have internal predecessors, (1117), 217 states have call successors, (217), 67 states have call predecessors, (217), 64 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2021-11-25 20:31:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1563 transitions. [2021-11-25 20:31:35,595 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1563 transitions. Word has length 120 [2021-11-25 20:31:35,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:35,596 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1563 transitions. [2021-11-25 20:31:35,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:31:35,596 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1563 transitions. [2021-11-25 20:31:35,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-25 20:31:35,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:35,603 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 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] [2021-11-25 20:31:35,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 20:31:35,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:35,818 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:35,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:35,818 INFO L85 PathProgramCache]: Analyzing trace with hash -2019963326, now seen corresponding path program 1 times [2021-11-25 20:31:35,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:35,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478284993] [2021-11-25 20:31:35,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:35,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-25 20:31:35,923 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:35,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478284993] [2021-11-25 20:31:35,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478284993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:35,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713462597] [2021-11-25 20:31:35,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:35,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:35,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:35,929 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:35,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:31:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:36,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:31:36,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-25 20:31:36,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:36,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713462597] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:36,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:31:36,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 20:31:36,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185009228] [2021-11-25 20:31:36,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:36,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:31:36,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:36,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:31:36,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:31:36,415 INFO L87 Difference]: Start difference. First operand 982 states and 1563 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:31:36,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:36,723 INFO L93 Difference]: Finished difference Result 2030 states and 3272 transitions. [2021-11-25 20:31:36,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:31:36,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 124 [2021-11-25 20:31:36,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:36,742 INFO L225 Difference]: With dead ends: 2030 [2021-11-25 20:31:36,746 INFO L226 Difference]: Without dead ends: 1060 [2021-11-25 20:31:36,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:31:36,757 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 209 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:36,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1395 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:31:36,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-11-25 20:31:36,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1060. [2021-11-25 20:31:36,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 776 states have (on average 1.6275773195876289) internal successors, (1263), 805 states have internal predecessors, (1263), 217 states have call successors, (217), 69 states have call predecessors, (217), 66 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2021-11-25 20:31:36,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1709 transitions. [2021-11-25 20:31:36,841 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1709 transitions. Word has length 124 [2021-11-25 20:31:36,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:36,844 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 1709 transitions. [2021-11-25 20:31:36,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:31:36,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1709 transitions. [2021-11-25 20:31:36,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-25 20:31:36,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:36,850 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 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] [2021-11-25 20:31:36,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:37,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:37,064 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:37,064 INFO L85 PathProgramCache]: Analyzing trace with hash -629577970, now seen corresponding path program 1 times [2021-11-25 20:31:37,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:37,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372522246] [2021-11-25 20:31:37,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:37,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-25 20:31:37,191 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:37,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372522246] [2021-11-25 20:31:37,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372522246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:37,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544156797] [2021-11-25 20:31:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:37,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:37,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:37,193 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:37,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:31:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:37,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 1309 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:31:37,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 20:31:37,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:37,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544156797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:37,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:31:37,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 20:31:37,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205175966] [2021-11-25 20:31:37,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:37,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:31:37,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:37,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:31:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:31:37,698 INFO L87 Difference]: Start difference. First operand 1060 states and 1709 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:31:37,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:37,995 INFO L93 Difference]: Finished difference Result 2186 states and 3562 transitions. [2021-11-25 20:31:37,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:31:37,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 127 [2021-11-25 20:31:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:38,006 INFO L225 Difference]: With dead ends: 2186 [2021-11-25 20:31:38,006 INFO L226 Difference]: Without dead ends: 1138 [2021-11-25 20:31:38,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:31:38,015 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 207 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:38,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1395 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:31:38,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-11-25 20:31:38,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1138. [2021-11-25 20:31:38,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 852 states have (on average 1.653755868544601) internal successors, (1409), 881 states have internal predecessors, (1409), 217 states have call successors, (217), 71 states have call predecessors, (217), 68 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2021-11-25 20:31:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1855 transitions. [2021-11-25 20:31:38,083 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1855 transitions. Word has length 127 [2021-11-25 20:31:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:38,084 INFO L470 AbstractCegarLoop]: Abstraction has 1138 states and 1855 transitions. [2021-11-25 20:31:38,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:31:38,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1855 transitions. [2021-11-25 20:31:38,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-25 20:31:38,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:38,091 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 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] [2021-11-25 20:31:38,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:38,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:38,307 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:38,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:38,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1322774814, now seen corresponding path program 1 times [2021-11-25 20:31:38,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:38,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912381860] [2021-11-25 20:31:38,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:38,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-25 20:31:39,221 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:39,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912381860] [2021-11-25 20:31:39,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912381860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:39,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103656734] [2021-11-25 20:31:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:39,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:39,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:39,223 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:39,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:31:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:39,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:31:39,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-25 20:31:39,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:39,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103656734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:39,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:31:39,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [34] total 36 [2021-11-25 20:31:39,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805597315] [2021-11-25 20:31:39,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:39,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:31:39,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:39,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:31:39,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 20:31:39,741 INFO L87 Difference]: Start difference. First operand 1138 states and 1855 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:31:40,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:40,044 INFO L93 Difference]: Finished difference Result 2342 states and 3852 transitions. [2021-11-25 20:31:40,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:31:40,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 129 [2021-11-25 20:31:40,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:40,054 INFO L225 Difference]: With dead ends: 2342 [2021-11-25 20:31:40,055 INFO L226 Difference]: Without dead ends: 1216 [2021-11-25 20:31:40,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 20:31:40,063 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 205 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:40,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 1395 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:31:40,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-11-25 20:31:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1216. [2021-11-25 20:31:40,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 928 states have (on average 1.675646551724138) internal successors, (1555), 957 states have internal predecessors, (1555), 217 states have call successors, (217), 73 states have call predecessors, (217), 70 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2021-11-25 20:31:40,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 2001 transitions. [2021-11-25 20:31:40,122 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 2001 transitions. Word has length 129 [2021-11-25 20:31:40,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:40,123 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 2001 transitions. [2021-11-25 20:31:40,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:31:40,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 2001 transitions. [2021-11-25 20:31:40,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-25 20:31:40,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:40,129 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 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] [2021-11-25 20:31:40,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-25 20:31:40,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:40,346 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:40,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:40,346 INFO L85 PathProgramCache]: Analyzing trace with hash -199881651, now seen corresponding path program 1 times [2021-11-25 20:31:40,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:40,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033094935] [2021-11-25 20:31:40,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:40,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-25 20:31:40,440 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:40,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033094935] [2021-11-25 20:31:40,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033094935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:40,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:40,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:31:40,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912973571] [2021-11-25 20:31:40,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:40,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:31:40,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:40,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:31:40,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:31:40,443 INFO L87 Difference]: Start difference. First operand 1216 states and 2001 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 20:31:41,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:41,002 INFO L93 Difference]: Finished difference Result 2504 states and 4108 transitions. [2021-11-25 20:31:41,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:31:41,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 129 [2021-11-25 20:31:41,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:41,012 INFO L225 Difference]: With dead ends: 2504 [2021-11-25 20:31:41,013 INFO L226 Difference]: Without dead ends: 1113 [2021-11-25 20:31:41,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:31:41,021 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 700 mSDsluCounter, 2326 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 2798 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:41,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 2798 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:31:41,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-11-25 20:31:41,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1090. [2021-11-25 20:31:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 782 states have (on average 1.5549872122762147) internal successors, (1216), 813 states have internal predecessors, (1216), 229 states have call successors, (229), 82 states have call predecessors, (229), 78 states have return successors, (249), 218 states have call predecessors, (249), 226 states have call successors, (249) [2021-11-25 20:31:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1694 transitions. [2021-11-25 20:31:41,078 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1694 transitions. Word has length 129 [2021-11-25 20:31:41,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:41,079 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1694 transitions. [2021-11-25 20:31:41,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 20:31:41,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1694 transitions. [2021-11-25 20:31:41,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-25 20:31:41,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:41,084 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2021-11-25 20:31:41,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:31:41,085 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:41,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:41,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1071984850, now seen corresponding path program 1 times [2021-11-25 20:31:41,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:41,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169555483] [2021-11-25 20:31:41,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:41,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-25 20:31:41,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:41,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169555483] [2021-11-25 20:31:41,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169555483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:41,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142001912] [2021-11-25 20:31:41,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:41,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:41,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:41,913 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:41,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:31:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:42,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 20:31:42,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-25 20:31:44,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:32:28,031 WARN L227 SmtUtils]: Spent 40.90s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 20:32:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-25 20:32:30,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142001912] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:32:30,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [505771854] [2021-11-25 20:32:30,982 INFO L159 IcfgInterpreter]: Started Sifa with 88 locations of interest [2021-11-25 20:32:30,982 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:32:30,987 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:32:30,992 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:32:30,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:32:33,750 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2021-11-25 20:32:37,221 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2021-11-25 20:32:37,889 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 570 for LOIs [2021-11-25 20:32:55,230 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 68 for LOIs [2021-11-25 20:32:55,238 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 500 for LOIs [2021-11-25 20:32:56,984 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 506 for LOIs [2021-11-25 20:32:59,448 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2021-11-25 20:32:59,584 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 455 for LOIs [2021-11-25 20:32:59,688 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull with input of size 437 for LOIs [2021-11-25 20:33:00,736 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 57 for LOIs [2021-11-25 20:33:00,749 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:33:19,079 WARN L227 SmtUtils]: Spent 5.25s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:33:24,892 WARN L227 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:36:32,547 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37132#(and (<= 0 |timeShift_processWaitingOnFloor_#in~floorID#1|) (= |old(~floorButtons_2~0)| 0) (<= ~floorButtons_3~0 0) (= ~executiveFloor~0 4) (= |old(~persons_1~0)| 0) (<= ~currentFloorID~0 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~1#1| 2147483647) (<= ~currentHeading~0 1) (= |old(~persons_5~0)| 0) (= |old(~doorState~0)| 1) (= |old(~persons_2~0)| 0) (= |timeShift_processWaitingOnFloor_~tmp___6~1#1| 0) (= ~persons_5~0 0) (= |old(~persons_4~0)| 0) (= |timeShift_processWaitingOnFloor_~tmp___0~11#1| 0) (<= ~personOnFloor_5_1~0 1) (= |old(~floorButtons_0~0)| 0) (<= ~weight~0 0) (<= ~floorButtons_0~0 0) (<= 0 ~floorButtons_1~0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 ~floorButtons_2~0) (<= 0 ~personOnFloor_0_0~0) (<= |timeShift_resetFloorButton_#in~floorID#1| 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~4#1| 0) (= ~calls_0~0 0) (= ~head~0.offset 0) (<= 0 ~currentFloorID~0) (= |timeShift_isExecutiveFloor_~retValue_acc~26#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 1 |timeShift_~tmp___9~2#1|) (= |old(~weight~0)| 0) (<= 0 |timeShift_resetFloorButton_#in~floorID#1|) (= ~persons_4~0 0) (<= |timeShift_processWaitingOnFloor_#in~floorID#1| 0) (<= 0 ~floorButtons_3~0) (<= 0 |old(~personOnFloor_0_0~0)|) (= |timeShift_areDoorsOpen_~retValue_acc~10#1| |timeShift_areDoorsOpen_#res#1|) (<= 0 |timeShift_resetFloorButton_~floorID#1|) (<= 0 |timeShift___utac_acc__Specification14_spec__1_~tmp~11#1|) (<= ~personOnFloor_0_0~0 0) (<= ~floorButtons_2~0 0) (= ~persons_3~0 0) (= |old(~floorButtons_4~0)| 0) (= |old(~persons_0~0)| 0) (<= 0 ~floorButtons_0~0) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~11#1|) (= ~doorState~0 1) (= |timeShift_processWaitingOnFloor_~tmp___10~0#1| 0) (<= |old(~personOnFloor_0_0~0)| 0) (<= 1 ~currentHeading~0) (= |old(~persons_3~0)| 0) (= ~persons_1~0 0) (= ~persons_0~0 0) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~4#1|) (= |old(~floorButtons_3~0)| 0) (= ~head~0.base 0) (<= 1 ~personOnFloor_5_1~0) (= |timeShift_areDoorsOpen_~retValue_acc~10#1| ~doorState~0) (= |timeShift_processWaitingOnFloor_~floorID#1| 0) (= |#NULL.offset| 0) (<= ~floorButtons_4~0 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~11#1| 0) (= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~22#1| 1) (<= |timeShift_~tmp___9~2#1| 1) (<= 1 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |old(~currentHeading~0)| 1) (= |timeShift_processWaitingOnFloor_~tmp___8~1#1| 0) (<= |timeShift_resetFloorButton_~floorID#1| 0) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~3#1|) (= |timeShift_stopRequestedAtCurrentFloor_~tmp~25#1| 0) (= |old(~personOnFloor_5_1~0)| 1) (= 1 |old(~calls_1~0)|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 ~floorButtons_4~0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~1#1| 0)) (= |old(~floorButtons_1~0)| 0) (= |old(~currentFloorID~0)| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~1#1|)) (<= 0 ~weight~0) (<= ~floorButtons_1~0 0) (= |timeShift_processWaitingOnFloor_~tmp___2~4#1| 0) (= ~cleanupTimeShifts~0 12) (= |timeShift_processWaitingOnFloor_~tmp___4~1#1| 0) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2021-11-25 20:36:32,547 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:36:32,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:36:32,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 19, 16] total 64 [2021-11-25 20:36:32,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839645693] [2021-11-25 20:36:32,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:36:32,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-25 20:36:32,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:36:32,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-25 20:36:32,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1216, Invalid=14534, Unknown=0, NotChecked=0, Total=15750 [2021-11-25 20:36:32,555 INFO L87 Difference]: Start difference. First operand 1090 states and 1694 transitions. Second operand has 64 states, 47 states have (on average 4.0638297872340425) internal successors, (191), 49 states have internal predecessors, (191), 16 states have call successors, (49), 9 states have call predecessors, (49), 24 states have return successors, (49), 24 states have call predecessors, (49), 16 states have call successors, (49) [2021-11-25 20:42:21,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:42:21,105 INFO L93 Difference]: Finished difference Result 40710 states and 66466 transitions. [2021-11-25 20:42:21,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1729 states. [2021-11-25 20:42:21,106 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 47 states have (on average 4.0638297872340425) internal successors, (191), 49 states have internal predecessors, (191), 16 states have call successors, (49), 9 states have call predecessors, (49), 24 states have return successors, (49), 24 states have call predecessors, (49), 16 states have call successors, (49) Word has length 130 [2021-11-25 20:42:21,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:42:21,441 INFO L225 Difference]: With dead ends: 40710 [2021-11-25 20:42:21,441 INFO L226 Difference]: Without dead ends: 32812 [2021-11-25 20:42:22,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2468 GetRequests, 603 SyntacticMatches, 17 SemanticMatches, 1848 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663019 ImplicationChecksByTransitivity, 356.6s TimeCoverageRelationStatistics Valid=173044, Invalid=3247606, Unknown=0, NotChecked=0, Total=3420650 [2021-11-25 20:42:22,134 INFO L933 BasicCegarLoop]: 2800 mSDtfsCounter, 41983 mSDsluCounter, 43850 mSDsCounter, 0 mSdLazyCounter, 328799 mSolverCounterSat, 65775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 161.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42010 SdHoareTripleChecker+Valid, 43581 SdHoareTripleChecker+Invalid, 394574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.1s SdHoareTripleChecker+Time, 65775 IncrementalHoareTripleChecker+Valid, 328799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 188.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:42:22,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42010 Valid, 43581 Invalid, 394574 Unknown, 0 Unchecked, 1.1s Time], IncrementalHoareTripleChecker [65775 Valid, 328799 Invalid, 0 Unknown, 0 Unchecked, 188.7s Time] [2021-11-25 20:42:22,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32812 states. [2021-11-25 20:42:24,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32812 to 19851. [2021-11-25 20:42:24,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19851 states, 14660 states have (on average 1.522919508867667) internal successors, (22326), 15149 states have internal predecessors, (22326), 3583 states have call successors, (3583), 1570 states have call predecessors, (3583), 1607 states have return successors, (4855), 3445 states have call predecessors, (4855), 3553 states have call successors, (4855) [2021-11-25 20:42:24,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19851 states to 19851 states and 30764 transitions. [2021-11-25 20:42:24,492 INFO L78 Accepts]: Start accepts. Automaton has 19851 states and 30764 transitions. Word has length 130 [2021-11-25 20:42:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:42:24,493 INFO L470 AbstractCegarLoop]: Abstraction has 19851 states and 30764 transitions. [2021-11-25 20:42:24,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 47 states have (on average 4.0638297872340425) internal successors, (191), 49 states have internal predecessors, (191), 16 states have call successors, (49), 9 states have call predecessors, (49), 24 states have return successors, (49), 24 states have call predecessors, (49), 16 states have call successors, (49) [2021-11-25 20:42:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 19851 states and 30764 transitions. [2021-11-25 20:42:24,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-25 20:42:24,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:42:24,525 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 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] [2021-11-25 20:42:24,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:42:24,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 20:42:24,753 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:42:24,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:42:24,754 INFO L85 PathProgramCache]: Analyzing trace with hash 224786128, now seen corresponding path program 1 times [2021-11-25 20:42:24,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:42:24,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084450968] [2021-11-25 20:42:24,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:42:24,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:42:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:42:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-25 20:42:24,842 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:42:24,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084450968] [2021-11-25 20:42:24,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084450968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:42:24,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776181025] [2021-11-25 20:42:24,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:42:24,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:42:24,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:42:24,844 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:42:24,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:42:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:42:25,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 1332 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:42:25,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:42:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-25 20:42:25,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:42:25,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776181025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:42:25,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:42:25,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-25 20:42:25,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925724342] [2021-11-25 20:42:25,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:42:25,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:42:25,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:42:25,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:42:25,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:42:25,427 INFO L87 Difference]: Start difference. First operand 19851 states and 30764 transitions. Second operand has 6 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 20:42:27,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:42:27,187 INFO L93 Difference]: Finished difference Result 35556 states and 54908 transitions. [2021-11-25 20:42:27,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:42:27,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 137 [2021-11-25 20:42:27,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:42:27,280 INFO L225 Difference]: With dead ends: 35556 [2021-11-25 20:42:27,281 INFO L226 Difference]: Without dead ends: 15726 [2021-11-25 20:42:27,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:42:27,382 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 370 mSDsluCounter, 1603 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 2106 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:42:27,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 2106 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:42:27,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15726 states. [2021-11-25 20:42:28,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15726 to 15642. [2021-11-25 20:42:28,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15642 states, 11649 states have (on average 1.5390162245686325) internal successors, (17928), 11978 states have internal predecessors, (17928), 2730 states have call successors, (2730), 1247 states have call predecessors, (2730), 1262 states have return successors, (3361), 2605 states have call predecessors, (3361), 2700 states have call successors, (3361) [2021-11-25 20:42:28,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15642 states to 15642 states and 24019 transitions. [2021-11-25 20:42:28,841 INFO L78 Accepts]: Start accepts. Automaton has 15642 states and 24019 transitions. Word has length 137 [2021-11-25 20:42:28,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:42:28,842 INFO L470 AbstractCegarLoop]: Abstraction has 15642 states and 24019 transitions. [2021-11-25 20:42:28,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 20:42:28,842 INFO L276 IsEmpty]: Start isEmpty. Operand 15642 states and 24019 transitions. [2021-11-25 20:42:28,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-25 20:42:28,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:42:28,892 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:42:28,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:42:29,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:42:29,105 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:42:29,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:42:29,106 INFO L85 PathProgramCache]: Analyzing trace with hash -759224858, now seen corresponding path program 1 times [2021-11-25 20:42:29,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:42:29,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284241182] [2021-11-25 20:42:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:42:29,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:42:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:42:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 20 proven. 52 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-25 20:42:29,393 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:42:29,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284241182] [2021-11-25 20:42:29,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284241182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:42:29,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354926469] [2021-11-25 20:42:29,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:42:29,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:42:29,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:42:29,397 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:42:29,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd4158de-b682-4af2-a815-c1c86f8a27e5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:42:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:42:29,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 2079 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:42:29,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:42:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 94 proven. 18 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-25 20:42:30,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:42:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-25 20:42:30,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354926469] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:42:30,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [569367880] [2021-11-25 20:42:30,881 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2021-11-25 20:42:30,882 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:42:30,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:42:30,883 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:42:30,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:42:36,934 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2021-11-25 20:42:42,865 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 40 for LOIs [2021-11-25 20:42:42,975 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 73 for LOIs