./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 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/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_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 08:39:34,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:39:34,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:39:34,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:39:34,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:39:34,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:39:34,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:39:34,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:39:34,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:39:34,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:39:34,158 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:39:34,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:39:34,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:39:34,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:39:34,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:39:34,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:39:34,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:39:34,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:39:34,166 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:39:34,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:39:34,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:39:34,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:39:34,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:39:34,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:39:34,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:39:34,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:39:34,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:39:34,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:39:34,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:39:34,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:39:34,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:39:34,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:39:34,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:39:34,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:39:34,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:39:34,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:39:34,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:39:34,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:39:34,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:39:34,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:39:34,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:39:34,183 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:39:34,197 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:39:34,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:39:34,198 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:39:34,198 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:39:34,198 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:39:34,199 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:39:34,199 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:39:34,199 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:39:34,199 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:39:34,199 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:39:34,199 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:39:34,200 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:39:34,200 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:39:34,200 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:39:34,200 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:39:34,200 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:39:34,200 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:39:34,200 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:39:34,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:39:34,201 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:39:34,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:39:34,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:39:34,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:39:34,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:39:34,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:39:34,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:39:34,203 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:39:34,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:39:34,203 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:39:34,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:39:34,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:39:34,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:39:34,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:39:34,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:39:34,204 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:39:34,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:39:34,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:39:34,204 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:39:34,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:39:34,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:39:34,205 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:39:34,205 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e3e095c3e35754b69c5b770f69d2f55696576eebdd6e61f09ab7280f663a93f [2022-12-14 08:39:34,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:39:34,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:39:34,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:39:34,402 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:39:34,403 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:39:34,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c [2022-12-14 08:39:37,064 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:39:37,349 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:39:37,350 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c [2022-12-14 08:39:37,364 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/data/a54af23f0/e3d819c2b2d041baa43b341d61fbbc3b/FLAG09a16ab3e [2022-12-14 08:39:37,375 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/data/a54af23f0/e3d819c2b2d041baa43b341d61fbbc3b [2022-12-14 08:39:37,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:39:37,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:39:37,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:39:37,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:39:37,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:39:37,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:39:37" (1/1) ... [2022-12-14 08:39:37,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19fb3c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:37, skipping insertion in model container [2022-12-14 08:39:37,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:39:37" (1/1) ... [2022-12-14 08:39:37,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:39:37,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:39:37,647 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c[8585,8598] [2022-12-14 08:39:37,819 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:39:37,829 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:39:37,851 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c[8585,8598] [2022-12-14 08:39:37,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:39:37,949 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:39:37,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:37 WrapperNode [2022-12-14 08:39:37,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:39:37,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:39:37,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:39:37,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:39:37,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:37" (1/1) ... [2022-12-14 08:39:37,972 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:37" (1/1) ... [2022-12-14 08:39:38,003 INFO L138 Inliner]: procedures = 93, calls = 340, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 854 [2022-12-14 08:39:38,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:39:38,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:39:38,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:39:38,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:39:38,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:37" (1/1) ... [2022-12-14 08:39:38,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:37" (1/1) ... [2022-12-14 08:39:38,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:37" (1/1) ... [2022-12-14 08:39:38,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:37" (1/1) ... [2022-12-14 08:39:38,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:37" (1/1) ... [2022-12-14 08:39:38,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:37" (1/1) ... [2022-12-14 08:39:38,037 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:37" (1/1) ... [2022-12-14 08:39:38,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:37" (1/1) ... [2022-12-14 08:39:38,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:39:38,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:39:38,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:39:38,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:39:38,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:37" (1/1) ... [2022-12-14 08:39:38,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:39:38,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:39:38,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:39:38,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:39:38,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:39:38,105 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-12-14 08:39:38,105 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-12-14 08:39:38,105 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 08:39:38,105 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 08:39:38,105 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 08:39:38,105 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 08:39:38,106 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 08:39:38,106 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 08:39:38,106 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 08:39:38,106 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 08:39:38,106 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 08:39:38,106 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 08:39:38,106 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 08:39:38,107 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 08:39:38,107 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 08:39:38,107 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 08:39:38,107 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 08:39:38,107 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 08:39:38,107 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 08:39:38,107 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 08:39:38,107 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 08:39:38,108 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 08:39:38,108 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 08:39:38,108 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 08:39:38,108 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 08:39:38,108 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 08:39:38,108 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 08:39:38,108 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 08:39:38,109 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 08:39:38,109 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 08:39:38,109 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 08:39:38,109 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 08:39:38,109 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 08:39:38,109 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 08:39:38,109 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 08:39:38,110 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 08:39:38,110 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 08:39:38,110 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 08:39:38,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:39:38,110 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 08:39:38,110 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 08:39:38,110 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 08:39:38,110 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 08:39:38,111 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 08:39:38,111 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 08:39:38,111 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 08:39:38,111 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 08:39:38,111 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-12-14 08:39:38,111 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-12-14 08:39:38,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:39:38,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:39:38,112 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 08:39:38,112 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 08:39:38,221 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:39:38,223 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:39:39,021 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:39:39,447 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:39:39,447 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 08:39:39,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:39:39 BoogieIcfgContainer [2022-12-14 08:39:39,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:39:39,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:39:39,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:39:39,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:39:39,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:39:37" (1/3) ... [2022-12-14 08:39:39,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ce6fdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:39:39, skipping insertion in model container [2022-12-14 08:39:39,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:37" (2/3) ... [2022-12-14 08:39:39,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ce6fdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:39:39, skipping insertion in model container [2022-12-14 08:39:39,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:39:39" (3/3) ... [2022-12-14 08:39:39,456 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product23.cil.c [2022-12-14 08:39:39,471 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:39:39,471 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:39:39,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:39:39,515 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4040e837, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:39:39,515 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:39:39,520 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) [2022-12-14 08:39:39,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 08:39:39,533 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:39:39,533 INFO L195 NwaCegarLoop]: 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] [2022-12-14 08:39:39,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:39:39,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:39:39,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1545701800, now seen corresponding path program 1 times [2022-12-14 08:39:39,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:39:39,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092408732] [2022-12-14 08:39:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:39,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:39:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 08:39:40,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:39:40,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092408732] [2022-12-14 08:39:40,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092408732] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:39:40,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:39:40,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:39:40,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815594052] [2022-12-14 08:39:40,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:39:40,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:39:40,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:39:40,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:39:40,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:39:40,109 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) [2022-12-14 08:39:40,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:39:40,734 INFO L93 Difference]: Finished difference Result 1106 states and 1750 transitions. [2022-12-14 08:39:40,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:39:40,737 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 [2022-12-14 08:39:40,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:39:40,753 INFO L225 Difference]: With dead ends: 1106 [2022-12-14 08:39:40,753 INFO L226 Difference]: Without dead ends: 731 [2022-12-14 08:39:40,760 INFO L412 NwaCegarLoop]: 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 [2022-12-14 08:39:40,763 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 561 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:39:40,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 2428 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:39:40,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-12-14 08:39:40,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 725. [2022-12-14 08:39:40,866 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) [2022-12-14 08:39:40,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1138 transitions. [2022-12-14 08:39:40,875 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1138 transitions. Word has length 73 [2022-12-14 08:39:40,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:39:40,876 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 1138 transitions. [2022-12-14 08:39:40,876 INFO L496 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) [2022-12-14 08:39:40,877 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1138 transitions. [2022-12-14 08:39:40,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 08:39:40,883 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:39:40,883 INFO L195 NwaCegarLoop]: 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] [2022-12-14 08:39:40,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:39:40,884 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:39:40,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:39:40,884 INFO L85 PathProgramCache]: Analyzing trace with hash 959440123, now seen corresponding path program 1 times [2022-12-14 08:39:40,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:39:40,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600994008] [2022-12-14 08:39:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:40,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:39:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 08:39:41,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:39:41,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600994008] [2022-12-14 08:39:41,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600994008] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:39:41,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:39:41,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:39:41,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491103008] [2022-12-14 08:39:41,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:39:41,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:39:41,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:39:41,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:39:41,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:39:41,170 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) [2022-12-14 08:39:41,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:39:41,776 INFO L93 Difference]: Finished difference Result 834 states and 1301 transitions. [2022-12-14 08:39:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:39:41,777 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 [2022-12-14 08:39:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:39:41,783 INFO L225 Difference]: With dead ends: 834 [2022-12-14 08:39:41,784 INFO L226 Difference]: Without dead ends: 832 [2022-12-14 08:39:41,785 INFO L412 NwaCegarLoop]: 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 [2022-12-14 08:39:41,786 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 684 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:39:41,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 1740 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:39:41,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-12-14 08:39:41,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 822. [2022-12-14 08:39:41,828 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) [2022-12-14 08:39:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1267 transitions. [2022-12-14 08:39:41,834 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1267 transitions. Word has length 77 [2022-12-14 08:39:41,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:39:41,835 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 1267 transitions. [2022-12-14 08:39:41,835 INFO L496 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) [2022-12-14 08:39:41,835 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1267 transitions. [2022-12-14 08:39:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 08:39:41,838 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:39:41,839 INFO L195 NwaCegarLoop]: 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] [2022-12-14 08:39:41,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:39:41,839 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:39:41,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:39:41,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1029422718, now seen corresponding path program 1 times [2022-12-14 08:39:41,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:39:41,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489882224] [2022-12-14 08:39:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:41,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:39:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 08:39:41,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:39:41,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489882224] [2022-12-14 08:39:41,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489882224] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:39:41,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:39:41,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:39:41,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075091808] [2022-12-14 08:39:41,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:39:41,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:39:41,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:39:41,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:39:41,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:39:41,977 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) [2022-12-14 08:39:42,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:39:42,136 INFO L93 Difference]: Finished difference Result 1670 states and 2603 transitions. [2022-12-14 08:39:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:39:42,137 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 [2022-12-14 08:39:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:39:42,141 INFO L225 Difference]: With dead ends: 1670 [2022-12-14 08:39:42,141 INFO L226 Difference]: Without dead ends: 860 [2022-12-14 08:39:42,145 INFO L412 NwaCegarLoop]: 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 [2022-12-14 08:39:42,146 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 54 mSDsluCounter, 1067 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 [2022-12-14 08:39:42,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1621 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:39:42,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-12-14 08:39:42,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 826. [2022-12-14 08:39:42,174 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) [2022-12-14 08:39:42,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1271 transitions. [2022-12-14 08:39:42,180 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1271 transitions. Word has length 108 [2022-12-14 08:39:42,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:39:42,180 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 1271 transitions. [2022-12-14 08:39:42,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2022-12-14 08:39:42,181 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1271 transitions. [2022-12-14 08:39:42,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 08:39:42,183 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:39:42,183 INFO L195 NwaCegarLoop]: 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] [2022-12-14 08:39:42,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 08:39:42,184 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:39:42,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:39:42,184 INFO L85 PathProgramCache]: Analyzing trace with hash -2136478042, now seen corresponding path program 1 times [2022-12-14 08:39:42,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:39:42,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636773960] [2022-12-14 08:39:42,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:42,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:39:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 08:39:42,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:39:42,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636773960] [2022-12-14 08:39:42,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636773960] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:39:42,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365178225] [2022-12-14 08:39:42,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:42,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:39:42,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:39:42,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:39:42,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:39:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:43,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:39:43,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:39:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 08:39:43,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:39:43,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365178225] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:39:43,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:39:43,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 14 [2022-12-14 08:39:43,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660451026] [2022-12-14 08:39:43,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:39:43,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:39:43,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:39:43,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:39:43,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-12-14 08:39:43,107 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) [2022-12-14 08:39:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:39:43,351 INFO L93 Difference]: Finished difference Result 1718 states and 2692 transitions. [2022-12-14 08:39:43,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:39:43,352 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 [2022-12-14 08:39:43,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:39:43,358 INFO L225 Difference]: With dead ends: 1718 [2022-12-14 08:39:43,358 INFO L226 Difference]: Without dead ends: 904 [2022-12-14 08:39:43,364 INFO L412 NwaCegarLoop]: 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 [2022-12-14 08:39:43,365 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 213 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-12-14 08:39:43,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1395 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:39:43,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-12-14 08:39:43,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 904. [2022-12-14 08:39:43,413 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) [2022-12-14 08:39:43,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1417 transitions. [2022-12-14 08:39:43,421 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1417 transitions. Word has length 115 [2022-12-14 08:39:43,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:39:43,421 INFO L495 AbstractCegarLoop]: Abstraction has 904 states and 1417 transitions. [2022-12-14 08:39:43,422 INFO L496 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) [2022-12-14 08:39:43,422 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1417 transitions. [2022-12-14 08:39:43,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 08:39:43,426 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:39:43,426 INFO L195 NwaCegarLoop]: 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] [2022-12-14 08:39:43,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:39:43,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-14 08:39:43,627 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:39:43,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:39:43,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1150963044, now seen corresponding path program 1 times [2022-12-14 08:39:43,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:39:43,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199805351] [2022-12-14 08:39:43,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:43,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:39:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 08:39:43,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:39:43,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199805351] [2022-12-14 08:39:43,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199805351] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:39:43,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672413992] [2022-12-14 08:39:43,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:43,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:39:43,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:39:43,775 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:39:43,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:39:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:44,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1302 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:39:44,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:39:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 08:39:44,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:39:44,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672413992] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:39:44,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:39:44,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 08:39:44,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555933095] [2022-12-14 08:39:44,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:39:44,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:39:44,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:39:44,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:39:44,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:39:44,041 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) [2022-12-14 08:39:44,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:39:44,270 INFO L93 Difference]: Finished difference Result 1874 states and 2982 transitions. [2022-12-14 08:39:44,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:39:44,271 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 [2022-12-14 08:39:44,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:39:44,275 INFO L225 Difference]: With dead ends: 1874 [2022-12-14 08:39:44,275 INFO L226 Difference]: Without dead ends: 982 [2022-12-14 08:39:44,279 INFO L412 NwaCegarLoop]: 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 [2022-12-14 08:39:44,280 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 211 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-12-14 08:39:44,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1395 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:39:44,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-12-14 08:39:44,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 982. [2022-12-14 08:39:44,307 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) [2022-12-14 08:39:44,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1563 transitions. [2022-12-14 08:39:44,312 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1563 transitions. Word has length 120 [2022-12-14 08:39:44,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:39:44,312 INFO L495 AbstractCegarLoop]: Abstraction has 982 states and 1563 transitions. [2022-12-14 08:39:44,312 INFO L496 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) [2022-12-14 08:39:44,312 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1563 transitions. [2022-12-14 08:39:44,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 08:39:44,315 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:39:44,315 INFO L195 NwaCegarLoop]: 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] [2022-12-14 08:39:44,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:39:44,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:39:44,515 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:39:44,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:39:44,516 INFO L85 PathProgramCache]: Analyzing trace with hash -530173748, now seen corresponding path program 1 times [2022-12-14 08:39:44,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:39:44,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043482779] [2022-12-14 08:39:44,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:44,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:39:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 08:39:44,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:39:44,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043482779] [2022-12-14 08:39:44,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043482779] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:39:44,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109881703] [2022-12-14 08:39:44,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:44,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:39:44,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:39:44,624 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:39:44,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:39:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:44,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:39:44,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:39:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 08:39:44,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:39:44,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109881703] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:39:44,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:39:44,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 08:39:44,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407613241] [2022-12-14 08:39:44,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:39:44,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:39:44,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:39:44,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:39:44,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:39:44,847 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) [2022-12-14 08:39:45,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:39:45,064 INFO L93 Difference]: Finished difference Result 2030 states and 3272 transitions. [2022-12-14 08:39:45,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:39:45,065 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 [2022-12-14 08:39:45,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:39:45,070 INFO L225 Difference]: With dead ends: 2030 [2022-12-14 08:39:45,070 INFO L226 Difference]: Without dead ends: 1060 [2022-12-14 08:39:45,075 INFO L412 NwaCegarLoop]: 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 [2022-12-14 08:39:45,076 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 209 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-12-14 08:39:45,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1395 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:39:45,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2022-12-14 08:39:45,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1060. [2022-12-14 08:39:45,103 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) [2022-12-14 08:39:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1709 transitions. [2022-12-14 08:39:45,107 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1709 transitions. Word has length 124 [2022-12-14 08:39:45,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:39:45,108 INFO L495 AbstractCegarLoop]: Abstraction has 1060 states and 1709 transitions. [2022-12-14 08:39:45,108 INFO L496 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) [2022-12-14 08:39:45,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1709 transitions. [2022-12-14 08:39:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 08:39:45,111 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:39:45,111 INFO L195 NwaCegarLoop]: 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] [2022-12-14 08:39:45,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:39:45,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:39:45,312 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:39:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:39:45,313 INFO L85 PathProgramCache]: Analyzing trace with hash -622112122, now seen corresponding path program 1 times [2022-12-14 08:39:45,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:39:45,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85828878] [2022-12-14 08:39:45,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:45,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:39:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-14 08:39:45,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:39:45,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85828878] [2022-12-14 08:39:45,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85828878] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:39:45,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092800250] [2022-12-14 08:39:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:45,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:39:45,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:39:45,584 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:39:45,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:39:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:45,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1309 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:39:45,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:39:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 08:39:45,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:39:45,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092800250] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:39:45,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:39:45,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 08:39:45,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548490999] [2022-12-14 08:39:45,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:39:45,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:39:45,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:39:45,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:39:45,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:39:45,829 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) [2022-12-14 08:39:46,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:39:46,061 INFO L93 Difference]: Finished difference Result 2186 states and 3562 transitions. [2022-12-14 08:39:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:39:46,062 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 [2022-12-14 08:39:46,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:39:46,067 INFO L225 Difference]: With dead ends: 2186 [2022-12-14 08:39:46,067 INFO L226 Difference]: Without dead ends: 1138 [2022-12-14 08:39:46,070 INFO L412 NwaCegarLoop]: 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 [2022-12-14 08:39:46,071 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 207 mSDsluCounter, 922 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 [2022-12-14 08:39:46,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1395 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:39:46,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-12-14 08:39:46,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1138. [2022-12-14 08:39:46,097 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) [2022-12-14 08:39:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1855 transitions. [2022-12-14 08:39:46,101 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1855 transitions. Word has length 127 [2022-12-14 08:39:46,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:39:46,101 INFO L495 AbstractCegarLoop]: Abstraction has 1138 states and 1855 transitions. [2022-12-14 08:39:46,101 INFO L496 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) [2022-12-14 08:39:46,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1855 transitions. [2022-12-14 08:39:46,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 08:39:46,105 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:39:46,105 INFO L195 NwaCegarLoop]: 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] [2022-12-14 08:39:46,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:39:46,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:39:46,305 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:39:46,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:39:46,306 INFO L85 PathProgramCache]: Analyzing trace with hash 469774038, now seen corresponding path program 1 times [2022-12-14 08:39:46,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:39:46,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744924742] [2022-12-14 08:39:46,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:46,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:39:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-14 08:39:48,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:39:48,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744924742] [2022-12-14 08:39:48,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744924742] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:39:48,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794678771] [2022-12-14 08:39:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:48,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:39:48,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:39:48,072 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:39:48,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:39:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:48,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:39:48,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:39:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-12-14 08:39:48,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:39:48,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794678771] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:39:48,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:39:48,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [34] total 36 [2022-12-14 08:39:48,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497253507] [2022-12-14 08:39:48,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:39:48,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:39:48,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:39:48,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:39:48,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 08:39:48,331 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) [2022-12-14 08:39:48,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:39:48,560 INFO L93 Difference]: Finished difference Result 2342 states and 3852 transitions. [2022-12-14 08:39:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:39:48,561 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 [2022-12-14 08:39:48,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:39:48,565 INFO L225 Difference]: With dead ends: 2342 [2022-12-14 08:39:48,565 INFO L226 Difference]: Without dead ends: 1216 [2022-12-14 08:39:48,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 08:39:48,568 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 205 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-12-14 08:39:48,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1395 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:39:48,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2022-12-14 08:39:48,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1216. [2022-12-14 08:39:48,594 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) [2022-12-14 08:39:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 2001 transitions. [2022-12-14 08:39:48,598 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 2001 transitions. Word has length 129 [2022-12-14 08:39:48,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:39:48,599 INFO L495 AbstractCegarLoop]: Abstraction has 1216 states and 2001 transitions. [2022-12-14 08:39:48,599 INFO L496 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) [2022-12-14 08:39:48,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 2001 transitions. [2022-12-14 08:39:48,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 08:39:48,601 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:39:48,602 INFO L195 NwaCegarLoop]: 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] [2022-12-14 08:39:48,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 08:39:48,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:39:48,802 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:39:48,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:39:48,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1052882427, now seen corresponding path program 1 times [2022-12-14 08:39:48,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:39:48,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101202832] [2022-12-14 08:39:48,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:48,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:39:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-14 08:39:48,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:39:48,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101202832] [2022-12-14 08:39:48,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101202832] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:39:48,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:39:48,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:39:48,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451649094] [2022-12-14 08:39:48,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:39:48,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:39:48,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:39:48,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:39:48,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:39:48,928 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) [2022-12-14 08:39:49,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:39:49,367 INFO L93 Difference]: Finished difference Result 2504 states and 4108 transitions. [2022-12-14 08:39:49,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:39:49,368 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 [2022-12-14 08:39:49,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:39:49,374 INFO L225 Difference]: With dead ends: 2504 [2022-12-14 08:39:49,374 INFO L226 Difference]: Without dead ends: 1113 [2022-12-14 08:39:49,379 INFO L412 NwaCegarLoop]: 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 [2022-12-14 08:39:49,380 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 700 mSDsluCounter, 2156 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 2771 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:39:49,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 2771 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:39:49,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-12-14 08:39:49,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1090. [2022-12-14 08:39:49,422 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) [2022-12-14 08:39:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1694 transitions. [2022-12-14 08:39:49,426 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1694 transitions. Word has length 129 [2022-12-14 08:39:49,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:39:49,426 INFO L495 AbstractCegarLoop]: Abstraction has 1090 states and 1694 transitions. [2022-12-14 08:39:49,426 INFO L496 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) [2022-12-14 08:39:49,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1694 transitions. [2022-12-14 08:39:49,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 08:39:49,429 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:39:49,429 INFO L195 NwaCegarLoop]: 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] [2022-12-14 08:39:49,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 08:39:49,429 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:39:49,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:39:49,429 INFO L85 PathProgramCache]: Analyzing trace with hash 2026947740, now seen corresponding path program 1 times [2022-12-14 08:39:49,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:39:49,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329406333] [2022-12-14 08:39:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:49,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:39:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-14 08:39:50,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:39:50,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329406333] [2022-12-14 08:39:50,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329406333] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:39:50,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364029943] [2022-12-14 08:39:50,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:50,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:39:50,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:39:50,837 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:39:50,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:39:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:51,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 08:39:51,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:39:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 08:39:52,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:40:19,447 WARN L233 SmtUtils]: Spent 25.51s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 08:40:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 08:40:21,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364029943] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:40:21,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1440829357] [2022-12-14 08:40:21,483 INFO L159 IcfgInterpreter]: Started Sifa with 88 locations of interest [2022-12-14 08:40:21,483 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:40:21,486 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:40:21,489 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:40:21,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:40:23,299 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-12-14 08:40:26,497 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 08:40:27,059 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 570 for LOIs [2022-12-14 08:40:44,002 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 68 for LOIs [2022-12-14 08:40:44,006 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 500 for LOIs [2022-12-14 08:40:45,951 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 506 for LOIs [2022-12-14 08:40:48,770 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 08:40:48,908 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 455 for LOIs [2022-12-14 08:40:49,014 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull with input of size 437 for LOIs [2022-12-14 08:40:50,036 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 57 for LOIs [2022-12-14 08:40:50,046 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:43:44,389 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) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~11#1|) (= ~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|) (<= ~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_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 [2022-12-14 08:43:44,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:43:44,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:43:44,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 19, 16] total 64 [2022-12-14 08:43:44,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405538512] [2022-12-14 08:43:44,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:43:44,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 08:43:44,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:43:44,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 08:43:44,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1216, Invalid=14534, Unknown=0, NotChecked=0, Total=15750 [2022-12-14 08:43:44,393 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) [2022-12-14 08:49:14,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:49:14,780 INFO L93 Difference]: Finished difference Result 40710 states and 66466 transitions. [2022-12-14 08:49:14,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1747 states. [2022-12-14 08:49:14,781 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 [2022-12-14 08:49:14,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:49:14,983 INFO L225 Difference]: With dead ends: 40710 [2022-12-14 08:49:14,983 INFO L226 Difference]: Without dead ends: 32812 [2022-12-14 08:49:15,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2486 GetRequests, 603 SyntacticMatches, 17 SemanticMatches, 1866 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696233 ImplicationChecksByTransitivity, 319.2s TimeCoverageRelationStatistics Valid=175034, Invalid=3312522, Unknown=0, NotChecked=0, Total=3487556 [2022-12-14 08:49:15,362 INFO L413 NwaCegarLoop]: 1796 mSDtfsCounter, 41619 mSDsluCounter, 42985 mSDsCounter, 0 mSdLazyCounter, 335404 mSolverCounterSat, 63529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 151.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41646 SdHoareTripleChecker+Valid, 44781 SdHoareTripleChecker+Invalid, 398933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.3s SdHoareTripleChecker+Time, 63529 IncrementalHoareTripleChecker+Valid, 335404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 170.9s IncrementalHoareTripleChecker+Time [2022-12-14 08:49:15,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41646 Valid, 44781 Invalid, 398933 Unknown, 0 Unchecked, 1.3s Time], IncrementalHoareTripleChecker [63529 Valid, 335404 Invalid, 0 Unknown, 0 Unchecked, 170.9s Time] [2022-12-14 08:49:15,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32812 states. [2022-12-14 08:49:17,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32812 to 19851. [2022-12-14 08:49:17,184 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) [2022-12-14 08:49:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19851 states to 19851 states and 30764 transitions. [2022-12-14 08:49:17,276 INFO L78 Accepts]: Start accepts. Automaton has 19851 states and 30764 transitions. Word has length 130 [2022-12-14 08:49:17,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:49:17,277 INFO L495 AbstractCegarLoop]: Abstraction has 19851 states and 30764 transitions. [2022-12-14 08:49:17,277 INFO L496 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) [2022-12-14 08:49:17,277 INFO L276 IsEmpty]: Start isEmpty. Operand 19851 states and 30764 transitions. [2022-12-14 08:49:17,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 08:49:17,288 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:49:17,289 INFO L195 NwaCegarLoop]: 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] [2022-12-14 08:49:17,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 08:49:17,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 08:49:17,489 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:49:17,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:49:17,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1398692696, now seen corresponding path program 1 times [2022-12-14 08:49:17,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:49:17,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442555133] [2022-12-14 08:49:17,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:17,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:49:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-12-14 08:49:17,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:49:17,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442555133] [2022-12-14 08:49:17,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442555133] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:49:17,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105647589] [2022-12-14 08:49:17,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:17,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:49:17,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:49:17,635 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:49:17,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:49:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:17,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1332 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:49:17,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:49:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-14 08:49:17,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:49:17,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105647589] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:49:17,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:49:17,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-12-14 08:49:17,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25871448] [2022-12-14 08:49:17,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:49:17,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:49:17,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:49:17,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:49:17,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:49:17,893 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) [2022-12-14 08:49:19,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:49:19,406 INFO L93 Difference]: Finished difference Result 35556 states and 54908 transitions. [2022-12-14 08:49:19,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:49:19,408 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 [2022-12-14 08:49:19,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:49:19,461 INFO L225 Difference]: With dead ends: 35556 [2022-12-14 08:49:19,462 INFO L226 Difference]: Without dead ends: 15726 [2022-12-14 08:49:19,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:49:19,520 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 370 mSDsluCounter, 1753 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 2366 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:49:19,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 2366 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:49:19,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15726 states. [2022-12-14 08:49:20,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15726 to 15642. [2022-12-14 08:49:20,370 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) [2022-12-14 08:49:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15642 states to 15642 states and 24019 transitions. [2022-12-14 08:49:20,429 INFO L78 Accepts]: Start accepts. Automaton has 15642 states and 24019 transitions. Word has length 137 [2022-12-14 08:49:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:49:20,429 INFO L495 AbstractCegarLoop]: Abstraction has 15642 states and 24019 transitions. [2022-12-14 08:49:20,429 INFO L496 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) [2022-12-14 08:49:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 15642 states and 24019 transitions. [2022-12-14 08:49:20,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-12-14 08:49:20,448 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:49:20,448 INFO L195 NwaCegarLoop]: 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] [2022-12-14 08:49:20,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 08:49:20,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 08:49:20,649 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:49:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:49:20,649 INFO L85 PathProgramCache]: Analyzing trace with hash 334894571, now seen corresponding path program 1 times [2022-12-14 08:49:20,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:49:20,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881776320] [2022-12-14 08:49:20,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:20,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:49:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 20 proven. 52 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-12-14 08:49:21,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:49:21,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881776320] [2022-12-14 08:49:21,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881776320] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:49:21,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300357128] [2022-12-14 08:49:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:49:21,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:49:21,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:49:21,058 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:49:21,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 08:49:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:21,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 2079 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 08:49:21,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:49:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 94 proven. 18 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-12-14 08:49:21,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:49:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-12-14 08:49:21,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300357128] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:49:21,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [903257181] [2022-12-14 08:49:21,709 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2022-12-14 08:49:21,709 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:49:21,710 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:49:21,710 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:49:21,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:49:26,724 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2022-12-14 08:49:33,536 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 40 for LOIs [2022-12-14 08:49:33,607 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 73 for LOIs [2022-12-14 08:49:33,665 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 44 for LOIs [2022-12-14 08:49:33,685 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 53 for LOIs [2022-12-14 08:49:33,691 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-12-14 08:49:37,096 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 08:49:37,658 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 34 for LOIs [2022-12-14 08:49:37,709 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 32 for LOIs [2022-12-14 08:49:37,712 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 08:49:37,847 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull with input of size 23 for LOIs [2022-12-14 08:49:37,897 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 24 for LOIs [2022-12-14 08:49:37,904 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:50:25,329 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '191479#(and (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~25#1| 2147483647) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~11#1|) (= ~executiveFloor~0 4) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~1#1| 2147483647) (= |timeShift_isExecutiveFloor_~retValue_acc~26#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~3#1|)) (= |timeShift_~tmp___9~2#1| 0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~4#1| 0) (= ~head~0.offset 0) (= |timeShift_isExecutiveFloor_~retValue_acc~26#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___8~2#1| 1) (not (= |timeShift_~tmp___8~2#1| 0)) (= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~22#1| 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~3#1| 0)) (= |timeShift_areDoorsOpen_~retValue_acc~10#1| |timeShift_areDoorsOpen_#res#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~25#1| 2147483648)) (<= 0 |timeShift_~tmp___8~2#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~10#1| 2147483648)) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~11#1|) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~4#1|) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |timeShift_areDoorsOpen_~retValue_acc~10#1| ~doorState~0) (= |#NULL.offset| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~10#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~3#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~11#1|)) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~3#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~1#1| 0)) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~1#1|)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~11#1| 2147483647) (= ~cleanupTimeShifts~0 12) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 08:50:25,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:50:25,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:50:25,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 30 [2022-12-14 08:50:25,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886151319] [2022-12-14 08:50:25,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:50:25,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 08:50:25,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:50:25,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 08:50:25,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=900, Invalid=9402, Unknown=0, NotChecked=0, Total=10302 [2022-12-14 08:50:25,334 INFO L87 Difference]: Start difference. First operand 15642 states and 24019 transitions. Second operand has 30 states, 24 states have (on average 9.0) internal successors, (216), 26 states have internal predecessors, (216), 14 states have call successors, (68), 7 states have call predecessors, (68), 10 states have return successors, (66), 15 states have call predecessors, (66), 14 states have call successors, (66) [2022-12-14 08:50:40,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:50:40,915 INFO L93 Difference]: Finished difference Result 40359 states and 65561 transitions. [2022-12-14 08:50:40,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-14 08:50:40,915 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 9.0) internal successors, (216), 26 states have internal predecessors, (216), 14 states have call successors, (68), 7 states have call predecessors, (68), 10 states have return successors, (66), 15 states have call predecessors, (66), 14 states have call successors, (66) Word has length 246 [2022-12-14 08:50:40,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:50:40,999 INFO L225 Difference]: With dead ends: 40359 [2022-12-14 08:50:40,999 INFO L226 Difference]: Without dead ends: 24669 [2022-12-14 08:50:41,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 846 GetRequests, 676 SyntacticMatches, 12 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9754 ImplicationChecksByTransitivity, 49.0s TimeCoverageRelationStatistics Valid=2014, Invalid=23426, Unknown=0, NotChecked=0, Total=25440 [2022-12-14 08:50:41,080 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 6345 mSDsluCounter, 7116 mSDsCounter, 0 mSdLazyCounter, 29633 mSolverCounterSat, 4933 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6357 SdHoareTripleChecker+Valid, 7754 SdHoareTripleChecker+Invalid, 34566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4933 IncrementalHoareTripleChecker+Valid, 29633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:50:41,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6357 Valid, 7754 Invalid, 34566 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4933 Valid, 29633 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2022-12-14 08:50:41,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24669 states. [2022-12-14 08:50:42,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24669 to 22962. [2022-12-14 08:50:42,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22962 states, 16751 states have (on average 1.4834935227747597) internal successors, (24850), 17224 states have internal predecessors, (24850), 4090 states have call successors, (4090), 2080 states have call predecessors, (4090), 2120 states have return successors, (5733), 3909 states have call predecessors, (5733), 4043 states have call successors, (5733) [2022-12-14 08:50:42,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22962 states to 22962 states and 34673 transitions. [2022-12-14 08:50:42,845 INFO L78 Accepts]: Start accepts. Automaton has 22962 states and 34673 transitions. Word has length 246 [2022-12-14 08:50:42,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:50:42,845 INFO L495 AbstractCegarLoop]: Abstraction has 22962 states and 34673 transitions. [2022-12-14 08:50:42,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 9.0) internal successors, (216), 26 states have internal predecessors, (216), 14 states have call successors, (68), 7 states have call predecessors, (68), 10 states have return successors, (66), 15 states have call predecessors, (66), 14 states have call successors, (66) [2022-12-14 08:50:42,846 INFO L276 IsEmpty]: Start isEmpty. Operand 22962 states and 34673 transitions. [2022-12-14 08:50:42,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-12-14 08:50:42,875 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:50:42,875 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 3, 3, 3, 3, 3, 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] [2022-12-14 08:50:42,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 08:50:43,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:50:43,076 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:50:43,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:50:43,076 INFO L85 PathProgramCache]: Analyzing trace with hash 576332672, now seen corresponding path program 1 times [2022-12-14 08:50:43,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:50:43,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883962348] [2022-12-14 08:50:43,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:50:43,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:50:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:50:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 23 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-12-14 08:50:43,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:50:43,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883962348] [2022-12-14 08:50:43,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883962348] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:50:43,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633041715] [2022-12-14 08:50:43,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:50:43,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:50:43,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:50:43,330 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:50:43,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 08:50:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:50:43,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 08:50:43,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:50:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 97 proven. 18 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-12-14 08:50:43,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:50:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 23 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-12-14 08:50:44,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633041715] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:50:44,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1605028606] [2022-12-14 08:50:44,093 INFO L159 IcfgInterpreter]: Started Sifa with 117 locations of interest [2022-12-14 08:50:44,093 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:50:44,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:50:44,094 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:50:44,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:50:48,632 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2022-12-14 08:50:55,350 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 40 for LOIs [2022-12-14 08:50:55,426 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 73 for LOIs [2022-12-14 08:50:55,506 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 44 for LOIs [2022-12-14 08:50:55,523 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 53 for LOIs [2022-12-14 08:50:55,530 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-12-14 08:50:58,684 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 08:50:59,256 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 34 for LOIs [2022-12-14 08:50:59,304 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 32 for LOIs [2022-12-14 08:50:59,305 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 08:50:59,439 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull with input of size 28 for LOIs [2022-12-14 08:50:59,491 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 24 for LOIs [2022-12-14 08:50:59,498 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:51:46,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '278218#(and (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~25#1| 2147483647) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~11#1|) (= ~executiveFloor~0 4) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~1#1| 2147483647) (= |timeShift_isExecutiveFloor_~retValue_acc~26#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~3#1|)) (= |timeShift_~tmp___9~2#1| 0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~4#1| 0) (= ~head~0.offset 0) (= |timeShift_isExecutiveFloor_~retValue_acc~26#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___8~2#1| 1) (not (= |timeShift_~tmp___8~2#1| 0)) (= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~22#1| 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~3#1| 0)) (= |timeShift_areDoorsOpen_~retValue_acc~10#1| |timeShift_areDoorsOpen_#res#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~25#1| 2147483648)) (<= 0 |timeShift_~tmp___8~2#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~10#1| 2147483648)) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~11#1|) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~4#1|) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |timeShift_areDoorsOpen_~retValue_acc~10#1| ~doorState~0) (= |#NULL.offset| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~10#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~3#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~11#1|)) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~3#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~1#1| 0)) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~1#1|)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~11#1| 2147483647) (= ~cleanupTimeShifts~0 12) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 08:51:46,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:51:46,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:51:46,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-12-14 08:51:46,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920190716] [2022-12-14 08:51:46,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:51:46,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 08:51:46,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:51:46,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 08:51:46,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=8429, Unknown=0, NotChecked=0, Total=9312 [2022-12-14 08:51:46,411 INFO L87 Difference]: Start difference. First operand 22962 states and 34673 transitions. Second operand has 25 states, 19 states have (on average 10.421052631578947) internal successors, (198), 22 states have internal predecessors, (198), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) [2022-12-14 08:51:52,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:51:52,682 INFO L93 Difference]: Finished difference Result 40691 states and 63328 transitions. [2022-12-14 08:51:52,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 08:51:52,683 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 10.421052631578947) internal successors, (198), 22 states have internal predecessors, (198), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) Word has length 250 [2022-12-14 08:51:52,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:51:52,780 INFO L225 Difference]: With dead ends: 40691 [2022-12-14 08:51:52,780 INFO L226 Difference]: Without dead ends: 25871 [2022-12-14 08:51:52,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 656 SyntacticMatches, 23 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6212 ImplicationChecksByTransitivity, 47.9s TimeCoverageRelationStatistics Valid=1300, Invalid=12742, Unknown=0, NotChecked=0, Total=14042 [2022-12-14 08:51:52,853 INFO L413 NwaCegarLoop]: 1076 mSDtfsCounter, 2946 mSDsluCounter, 11105 mSDsCounter, 0 mSdLazyCounter, 8217 mSolverCounterSat, 2293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2965 SdHoareTripleChecker+Valid, 12181 SdHoareTripleChecker+Invalid, 10510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2293 IncrementalHoareTripleChecker+Valid, 8217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:51:52,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2965 Valid, 12181 Invalid, 10510 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2293 Valid, 8217 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-14 08:51:52,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25871 states. [2022-12-14 08:51:54,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25871 to 25332. [2022-12-14 08:51:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25332 states, 18473 states have (on average 1.4559627564553672) internal successors, (26896), 18976 states have internal predecessors, (26896), 4492 states have call successors, (4492), 2290 states have call predecessors, (4492), 2366 states have return successors, (7247), 4317 states have call predecessors, (7247), 4445 states have call successors, (7247) [2022-12-14 08:51:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25332 states to 25332 states and 38635 transitions. [2022-12-14 08:51:54,596 INFO L78 Accepts]: Start accepts. Automaton has 25332 states and 38635 transitions. Word has length 250 [2022-12-14 08:51:54,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:51:54,596 INFO L495 AbstractCegarLoop]: Abstraction has 25332 states and 38635 transitions. [2022-12-14 08:51:54,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 10.421052631578947) internal successors, (198), 22 states have internal predecessors, (198), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) [2022-12-14 08:51:54,596 INFO L276 IsEmpty]: Start isEmpty. Operand 25332 states and 38635 transitions. [2022-12-14 08:51:54,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-12-14 08:51:54,623 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:51:54,623 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:51:54,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 08:51:54,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:51:54,825 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:51:54,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:51:54,826 INFO L85 PathProgramCache]: Analyzing trace with hash -444521456, now seen corresponding path program 1 times [2022-12-14 08:51:54,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:51:54,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314442977] [2022-12-14 08:51:54,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:54,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:51:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-12-14 08:51:55,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:51:55,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314442977] [2022-12-14 08:51:55,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314442977] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:51:55,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931209976] [2022-12-14 08:51:55,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:51:55,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:51:55,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:51:55,170 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:51:55,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b2994b8-eaf9-4ae3-b573-f38879cc7c26/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 08:51:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:51:55,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 1707 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 08:51:55,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:51:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 71 proven. 10 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-12-14 08:51:55,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:51:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-12-14 08:51:55,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931209976] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:51:55,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [50560358] [2022-12-14 08:51:55,702 INFO L159 IcfgInterpreter]: Started Sifa with 115 locations of interest [2022-12-14 08:51:55,702 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:51:55,703 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:51:55,703 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:51:55,703 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:51:59,043 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2022-12-14 08:52:05,776 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 40 for LOIs [2022-12-14 08:52:05,834 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 73 for LOIs [2022-12-14 08:52:05,891 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 85 for LOIs [2022-12-14 08:52:06,015 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 57 for LOIs [2022-12-14 08:52:06,027 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 53 for LOIs [2022-12-14 08:52:06,034 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-12-14 08:52:09,171 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 08:52:09,743 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 34 for LOIs [2022-12-14 08:52:09,770 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 32 for LOIs [2022-12-14 08:52:09,772 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 08:52:09,907 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull with input of size 28 for LOIs [2022-12-14 08:52:09,957 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 24 for LOIs [2022-12-14 08:52:09,964 INFO L180 IcfgInterpreter]: Interpretation finished