./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 19:45:44,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:45:44,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:45:44,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:45:44,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:45:44,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:45:44,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:45:44,163 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:45:44,165 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:45:44,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:45:44,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:45:44,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:45:44,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:45:44,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:45:44,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:45:44,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:45:44,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:45:44,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:45:44,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:45:44,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:45:44,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:45:44,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:45:44,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:45:44,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:45:44,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:45:44,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:45:44,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:45:44,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:45:44,188 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:45:44,189 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:45:44,189 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:45:44,190 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:45:44,191 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:45:44,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:45:44,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:45:44,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:45:44,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:45:44,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:45:44,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:45:44,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:45:44,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:45:44,203 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 19:45:44,234 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:45:44,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:45:44,234 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:45:44,235 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:45:44,235 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:45:44,236 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:45:44,236 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:45:44,236 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:45:44,237 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:45:44,237 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:45:44,237 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:45:44,237 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:45:44,238 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:45:44,238 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:45:44,238 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:45:44,238 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:45:44,244 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:45:44,244 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:45:44,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:45:44,246 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:45:44,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:45:44,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:45:44,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:45:44,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 19:45:44,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:45:44,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 19:45:44,249 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:45:44,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 19:45:44,250 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:45:44,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 19:45:44,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:45:44,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:45:44,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:45:44,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:45:44,252 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:45:44,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:45:44,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 19:45:44,254 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:45:44,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:45:44,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 19:45:44,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:45:44,256 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_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 [2022-11-20 19:45:44,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:45:44,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:45:44,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:45:44,601 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:45:44,602 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:45:44,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2022-11-20 19:45:47,737 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:45:48,095 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:45:48,096 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2022-11-20 19:45:48,128 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/data/0660d23a3/7cb17770e35b414a954d24f93d7138c7/FLAG4b6ca9e05 [2022-11-20 19:45:48,144 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/data/0660d23a3/7cb17770e35b414a954d24f93d7138c7 [2022-11-20 19:45:48,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:45:48,156 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:45:48,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:45:48,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:45:48,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:45:48,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:45:48" (1/1) ... [2022-11-20 19:45:48,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e651722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:48, skipping insertion in model container [2022-11-20 19:45:48,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:45:48" (1/1) ... [2022-11-20 19:45:48,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:45:48,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:45:48,805 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_4c09a1f0-21b8-4c38-abdc-6fa67b452199/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2022-11-20 19:45:48,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:45:48,959 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:45:49,094 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_4c09a1f0-21b8-4c38-abdc-6fa67b452199/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2022-11-20 19:45:49,155 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:45:49,217 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:45:49,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:49 WrapperNode [2022-11-20 19:45:49,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:45:49,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:45:49,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:45:49,219 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:45:49,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:49" (1/1) ... [2022-11-20 19:45:49,255 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:49" (1/1) ... [2022-11-20 19:45:49,310 INFO L138 Inliner]: procedures = 94, calls = 341, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 1104 [2022-11-20 19:45:49,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:45:49,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:45:49,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:45:49,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:45:49,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:49" (1/1) ... [2022-11-20 19:45:49,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:49" (1/1) ... [2022-11-20 19:45:49,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:49" (1/1) ... [2022-11-20 19:45:49,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:49" (1/1) ... [2022-11-20 19:45:49,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:49" (1/1) ... [2022-11-20 19:45:49,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:49" (1/1) ... [2022-11-20 19:45:49,402 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:49" (1/1) ... [2022-11-20 19:45:49,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:49" (1/1) ... [2022-11-20 19:45:49,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:45:49,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:45:49,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:45:49,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:45:49,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:49" (1/1) ... [2022-11-20 19:45:49,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:45:49,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:49,509 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:45:49,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:45:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:45:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-20 19:45:49,558 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-20 19:45:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-20 19:45:49,558 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-20 19:45:49,558 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-20 19:45:49,559 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-20 19:45:49,559 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-20 19:45:49,559 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-20 19:45:49,560 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-20 19:45:49,560 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-20 19:45:49,560 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-20 19:45:49,560 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-20 19:45:49,560 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-20 19:45:49,561 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-20 19:45:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-20 19:45:49,561 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-20 19:45:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-20 19:45:49,561 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-20 19:45:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-20 19:45:49,562 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-20 19:45:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-20 19:45:49,563 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-20 19:45:49,563 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-20 19:45:49,563 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-20 19:45:49,564 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-20 19:45:49,565 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-20 19:45:49,565 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-20 19:45:49,565 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-20 19:45:49,565 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-20 19:45:49,565 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-20 19:45:49,566 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-20 19:45:49,566 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-20 19:45:49,566 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-20 19:45:49,567 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-20 19:45:49,567 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-20 19:45:49,567 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-20 19:45:49,567 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-20 19:45:49,567 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-20 19:45:49,568 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-20 19:45:49,568 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-20 19:45:49,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 19:45:49,568 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-20 19:45:49,569 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-20 19:45:49,569 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-20 19:45:49,569 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-20 19:45:49,569 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-20 19:45:49,569 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-20 19:45:49,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:45:49,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:45:49,570 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-20 19:45:49,570 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-20 19:45:49,570 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-20 19:45:49,570 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-20 19:45:49,727 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:45:49,730 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:45:51,148 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:45:52,072 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:45:52,073 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 19:45:52,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:45:52 BoogieIcfgContainer [2022-11-20 19:45:52,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:45:52,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:45:52,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:45:52,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:45:52,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:45:48" (1/3) ... [2022-11-20 19:45:52,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca03ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:45:52, skipping insertion in model container [2022-11-20 19:45:52,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:49" (2/3) ... [2022-11-20 19:45:52,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca03ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:45:52, skipping insertion in model container [2022-11-20 19:45:52,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:45:52" (3/3) ... [2022-11-20 19:45:52,092 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product28.cil.c [2022-11-20 19:45:52,137 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:45:52,137 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 19:45:52,243 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:45:52,251 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;@3e5f3ed3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:45:52,252 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 19:45:52,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 366 states, 242 states have (on average 1.56198347107438) internal successors, (378), 260 states have internal predecessors, (378), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-20 19:45:52,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 19:45:52,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:52,280 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:45:52,281 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:45:52,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:52,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1751061673, now seen corresponding path program 1 times [2022-11-20 19:45:52,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:45:52,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340220499] [2022-11-20 19:45:52,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:52,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:45:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 19:45:53,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:45:53,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340220499] [2022-11-20 19:45:53,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340220499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:45:53,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:45:53,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:45:53,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057023672] [2022-11-20 19:45:53,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:45:53,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:45:53,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:45:53,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:45:53,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:45:53,263 INFO L87 Difference]: Start difference. First operand has 366 states, 242 states have (on average 1.56198347107438) internal successors, (378), 260 states have internal predecessors, (378), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-20 19:45:53,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:53,977 INFO L93 Difference]: Finished difference Result 1074 states and 1705 transitions. [2022-11-20 19:45:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:45:53,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2022-11-20 19:45:53,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:54,018 INFO L225 Difference]: With dead ends: 1074 [2022-11-20 19:45:54,019 INFO L226 Difference]: Without dead ends: 709 [2022-11-20 19:45:54,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:45:54,035 INFO L413 NwaCegarLoop]: 678 mSDtfsCounter, 546 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:45:54,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1197 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 19:45:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-11-20 19:45:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 673. [2022-11-20 19:45:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 459 states have (on average 1.5642701525054465) internal successors, (718), 485 states have internal predecessors, (718), 170 states have call successors, (170), 45 states have call predecessors, (170), 43 states have return successors, (175), 157 states have call predecessors, (175), 168 states have call successors, (175) [2022-11-20 19:45:54,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1063 transitions. [2022-11-20 19:45:54,209 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1063 transitions. Word has length 43 [2022-11-20 19:45:54,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:54,210 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 1063 transitions. [2022-11-20 19:45:54,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-20 19:45:54,210 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1063 transitions. [2022-11-20 19:45:54,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 19:45:54,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:54,220 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-20 19:45:54,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 19:45:54,220 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:45:54,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:54,222 INFO L85 PathProgramCache]: Analyzing trace with hash 26132879, now seen corresponding path program 1 times [2022-11-20 19:45:54,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:45:54,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235262804] [2022-11-20 19:45:54,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:54,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:45:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 19:45:54,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:45:54,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235262804] [2022-11-20 19:45:54,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235262804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:45:54,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:45:54,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 19:45:54,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157446121] [2022-11-20 19:45:54,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:45:54,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 19:45:54,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:45:54,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 19:45:54,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:45:54,894 INFO L87 Difference]: Start difference. First operand 673 states and 1063 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 19:45:57,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:57,839 INFO L93 Difference]: Finished difference Result 2177 states and 3481 transitions. [2022-11-20 19:45:57,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 19:45:57,840 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2022-11-20 19:45:57,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:57,857 INFO L225 Difference]: With dead ends: 2177 [2022-11-20 19:45:57,857 INFO L226 Difference]: Without dead ends: 1516 [2022-11-20 19:45:57,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-20 19:45:57,868 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 1094 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 2679 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 3127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 2679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 19:45:57,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1184 Valid, 1283 Invalid, 3127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 2679 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-20 19:45:57,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2022-11-20 19:45:58,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1374. [2022-11-20 19:45:58,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 940 states have (on average 1.5606382978723403) internal successors, (1467), 991 states have internal predecessors, (1467), 340 states have call successors, (340), 91 states have call predecessors, (340), 93 states have return successors, (384), 318 states have call predecessors, (384), 336 states have call successors, (384) [2022-11-20 19:45:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2191 transitions. [2022-11-20 19:45:58,037 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2191 transitions. Word has length 87 [2022-11-20 19:45:58,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:58,038 INFO L495 AbstractCegarLoop]: Abstraction has 1374 states and 2191 transitions. [2022-11-20 19:45:58,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 19:45:58,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2191 transitions. [2022-11-20 19:45:58,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-20 19:45:58,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:58,043 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-20 19:45:58,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 19:45:58,043 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:45:58,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:58,044 INFO L85 PathProgramCache]: Analyzing trace with hash 826960521, now seen corresponding path program 1 times [2022-11-20 19:45:58,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:45:58,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801144627] [2022-11-20 19:45:58,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:58,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:45:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 19:45:58,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:45:58,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801144627] [2022-11-20 19:45:58,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801144627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:45:58,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405956460] [2022-11-20 19:45:58,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:58,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:58,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:58,447 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:45:58,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 19:45:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:58,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 19:45:58,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 19:45:59,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:45:59,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405956460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:45:59,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:45:59,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2022-11-20 19:45:59,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509489931] [2022-11-20 19:45:59,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:45:59,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:45:59,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:45:59,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:45:59,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-20 19:45:59,023 INFO L87 Difference]: Start difference. First operand 1374 states and 2191 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 19:45:59,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:59,749 INFO L93 Difference]: Finished difference Result 3013 states and 4786 transitions. [2022-11-20 19:45:59,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 19:45:59,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 90 [2022-11-20 19:45:59,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:59,762 INFO L225 Difference]: With dead ends: 3013 [2022-11-20 19:45:59,763 INFO L226 Difference]: Without dead ends: 1650 [2022-11-20 19:45:59,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-20 19:45:59,778 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 376 mSDsluCounter, 1897 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 2483 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 19:45:59,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 2483 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 19:45:59,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-11-20 19:45:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1600. [2022-11-20 19:45:59,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1079 states have (on average 1.5199258572752548) internal successors, (1640), 1129 states have internal predecessors, (1640), 397 states have call successors, (397), 121 states have call predecessors, (397), 123 states have return successors, (455), 376 states have call predecessors, (455), 391 states have call successors, (455) [2022-11-20 19:45:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2492 transitions. [2022-11-20 19:45:59,953 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2492 transitions. Word has length 90 [2022-11-20 19:45:59,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:59,956 INFO L495 AbstractCegarLoop]: Abstraction has 1600 states and 2492 transitions. [2022-11-20 19:45:59,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 19:45:59,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2492 transitions. [2022-11-20 19:45:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-20 19:45:59,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:59,961 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-20 19:45:59,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 19:46:00,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:00,171 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:46:00,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:00,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1058882386, now seen corresponding path program 1 times [2022-11-20 19:46:00,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:00,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723879260] [2022-11-20 19:46:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:00,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 19:46:00,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:00,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723879260] [2022-11-20 19:46:00,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723879260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:00,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:46:00,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 19:46:00,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791150159] [2022-11-20 19:46:00,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:00,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 19:46:00,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:00,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 19:46:00,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:46:00,702 INFO L87 Difference]: Start difference. First operand 1600 states and 2492 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-20 19:46:04,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:04,108 INFO L93 Difference]: Finished difference Result 1978 states and 3164 transitions. [2022-11-20 19:46:04,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 19:46:04,109 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2022-11-20 19:46:04,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:04,131 INFO L225 Difference]: With dead ends: 1978 [2022-11-20 19:46:04,131 INFO L226 Difference]: Without dead ends: 1976 [2022-11-20 19:46:04,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-20 19:46:04,141 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 1385 mSDsluCounter, 1564 mSDsCounter, 0 mSdLazyCounter, 3168 mSolverCounterSat, 814 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 3982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 814 IncrementalHoareTripleChecker+Valid, 3168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:04,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1407 Valid, 2013 Invalid, 3982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [814 Valid, 3168 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-20 19:46:04,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2022-11-20 19:46:04,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1780. [2022-11-20 19:46:04,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1173 states have (on average 1.5089514066496164) internal successors, (1770), 1245 states have internal predecessors, (1770), 479 states have call successors, (479), 121 states have call predecessors, (479), 127 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-20 19:46:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2788 transitions. [2022-11-20 19:46:04,322 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2788 transitions. Word has length 91 [2022-11-20 19:46:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:04,323 INFO L495 AbstractCegarLoop]: Abstraction has 1780 states and 2788 transitions. [2022-11-20 19:46:04,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-20 19:46:04,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2788 transitions. [2022-11-20 19:46:04,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-20 19:46:04,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:04,334 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-11-20 19:46:04,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 19:46:04,334 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:46:04,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:04,335 INFO L85 PathProgramCache]: Analyzing trace with hash -158760090, now seen corresponding path program 1 times [2022-11-20 19:46:04,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:04,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102443924] [2022-11-20 19:46:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:04,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:04,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-20 19:46:04,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:04,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102443924] [2022-11-20 19:46:04,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102443924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:04,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:46:04,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 19:46:04,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875831151] [2022-11-20 19:46:04,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:04,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:46:04,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:04,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:46:04,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:46:04,572 INFO L87 Difference]: Start difference. First operand 1780 states and 2788 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-20 19:46:04,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:04,865 INFO L93 Difference]: Finished difference Result 3646 states and 5774 transitions. [2022-11-20 19:46:04,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:46:04,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 122 [2022-11-20 19:46:04,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:04,882 INFO L225 Difference]: With dead ends: 3646 [2022-11-20 19:46:04,882 INFO L226 Difference]: Without dead ends: 1878 [2022-11-20 19:46:04,895 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 [2022-11-20 19:46:04,895 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 30 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1570 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:04,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1570 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:46:04,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2022-11-20 19:46:05,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1792. [2022-11-20 19:46:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1185 states have (on average 1.5037974683544304) internal successors, (1782), 1257 states have internal predecessors, (1782), 479 states have call successors, (479), 121 states have call predecessors, (479), 127 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-20 19:46:05,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 2800 transitions. [2022-11-20 19:46:05,042 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 2800 transitions. Word has length 122 [2022-11-20 19:46:05,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:05,044 INFO L495 AbstractCegarLoop]: Abstraction has 1792 states and 2800 transitions. [2022-11-20 19:46:05,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-20 19:46:05,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 2800 transitions. [2022-11-20 19:46:05,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-20 19:46:05,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:05,049 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-11-20 19:46:05,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 19:46:05,050 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:46:05,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:05,051 INFO L85 PathProgramCache]: Analyzing trace with hash -125520464, now seen corresponding path program 1 times [2022-11-20 19:46:05,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:05,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209549822] [2022-11-20 19:46:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:05,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-20 19:46:05,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:05,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209549822] [2022-11-20 19:46:05,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209549822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:46:05,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89841014] [2022-11-20 19:46:05,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:05,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:05,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:46:05,401 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:46:05,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 19:46:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:05,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 1518 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 19:46:05,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:46:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 19:46:05,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:46:05,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89841014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:05,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:46:05,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-20 19:46:05,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940676891] [2022-11-20 19:46:05,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:05,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:46:05,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:05,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:46:05,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:46:05,875 INFO L87 Difference]: Start difference. First operand 1792 states and 2800 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, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-20 19:46:06,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:06,338 INFO L93 Difference]: Finished difference Result 3728 states and 5948 transitions. [2022-11-20 19:46:06,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:46:06,339 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, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 125 [2022-11-20 19:46:06,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:06,358 INFO L225 Difference]: With dead ends: 3728 [2022-11-20 19:46:06,359 INFO L226 Difference]: Without dead ends: 1948 [2022-11-20 19:46:06,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 19:46:06,373 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 213 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:06,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1359 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 19:46:06,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2022-11-20 19:46:06,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1948. [2022-11-20 19:46:06,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1337 states have (on average 1.5512341062079282) internal successors, (2074), 1409 states have internal predecessors, (2074), 479 states have call successors, (479), 125 states have call predecessors, (479), 131 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-20 19:46:06,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 3092 transitions. [2022-11-20 19:46:06,556 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 3092 transitions. Word has length 125 [2022-11-20 19:46:06,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:06,557 INFO L495 AbstractCegarLoop]: Abstraction has 1948 states and 3092 transitions. [2022-11-20 19:46:06,558 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, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-20 19:46:06,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 3092 transitions. [2022-11-20 19:46:06,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-20 19:46:06,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:06,566 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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] [2022-11-20 19:46:06,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 19:46:06,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:06,776 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:46:06,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:06,776 INFO L85 PathProgramCache]: Analyzing trace with hash 330063092, now seen corresponding path program 1 times [2022-11-20 19:46:06,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:06,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084252729] [2022-11-20 19:46:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:06,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-20 19:46:06,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:06,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084252729] [2022-11-20 19:46:06,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084252729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:46:06,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648457088] [2022-11-20 19:46:06,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:06,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:06,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:46:06,977 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:46:06,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 19:46:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:07,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 19:46:07,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:46:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 19:46:07,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:46:07,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648457088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:07,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:46:07,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-20 19:46:07,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739492034] [2022-11-20 19:46:07,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:07,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:46:07,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:07,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:46:07,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:46:07,422 INFO L87 Difference]: Start difference. First operand 1948 states and 3092 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, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-20 19:46:07,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:07,891 INFO L93 Difference]: Finished difference Result 4040 states and 6526 transitions. [2022-11-20 19:46:07,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:46:07,892 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, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 130 [2022-11-20 19:46:07,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:07,905 INFO L225 Difference]: With dead ends: 4040 [2022-11-20 19:46:07,905 INFO L226 Difference]: Without dead ends: 2104 [2022-11-20 19:46:07,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:46:07,918 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 211 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:07,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1359 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 19:46:07,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2022-11-20 19:46:08,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2104. [2022-11-20 19:46:08,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 1489 states have (on average 1.5889858965748824) internal successors, (2366), 1561 states have internal predecessors, (2366), 479 states have call successors, (479), 129 states have call predecessors, (479), 135 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-20 19:46:08,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3384 transitions. [2022-11-20 19:46:08,065 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3384 transitions. Word has length 130 [2022-11-20 19:46:08,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:08,065 INFO L495 AbstractCegarLoop]: Abstraction has 2104 states and 3384 transitions. [2022-11-20 19:46:08,065 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, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-20 19:46:08,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3384 transitions. [2022-11-20 19:46:08,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-20 19:46:08,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:08,072 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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] [2022-11-20 19:46:08,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 19:46:08,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:08,280 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:46:08,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:08,280 INFO L85 PathProgramCache]: Analyzing trace with hash -910319452, now seen corresponding path program 1 times [2022-11-20 19:46:08,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:08,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090953361] [2022-11-20 19:46:08,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:08,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-20 19:46:08,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:08,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090953361] [2022-11-20 19:46:08,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090953361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:46:08,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062222945] [2022-11-20 19:46:08,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:08,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:08,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:46:08,433 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:46:08,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 19:46:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:08,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 19:46:08,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:46:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 19:46:08,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:46:08,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062222945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:08,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:46:08,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-20 19:46:08,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659877002] [2022-11-20 19:46:08,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:08,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:46:08,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:08,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:46:08,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:46:08,839 INFO L87 Difference]: Start difference. First operand 2104 states and 3384 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, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-20 19:46:09,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:09,270 INFO L93 Difference]: Finished difference Result 4352 states and 7104 transitions. [2022-11-20 19:46:09,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:46:09,271 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, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 134 [2022-11-20 19:46:09,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:09,287 INFO L225 Difference]: With dead ends: 4352 [2022-11-20 19:46:09,287 INFO L226 Difference]: Without dead ends: 2260 [2022-11-20 19:46:09,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:46:09,301 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 209 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:09,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1359 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:46:09,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-11-20 19:46:09,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2260. [2022-11-20 19:46:09,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 1641 states have (on average 1.6197440585009142) internal successors, (2658), 1713 states have internal predecessors, (2658), 479 states have call successors, (479), 133 states have call predecessors, (479), 139 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-20 19:46:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 3676 transitions. [2022-11-20 19:46:09,443 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 3676 transitions. Word has length 134 [2022-11-20 19:46:09,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:09,444 INFO L495 AbstractCegarLoop]: Abstraction has 2260 states and 3676 transitions. [2022-11-20 19:46:09,444 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, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-20 19:46:09,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 3676 transitions. [2022-11-20 19:46:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-20 19:46:09,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:09,450 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 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] [2022-11-20 19:46:09,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 19:46:09,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 19:46:09,658 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:46:09,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:09,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1694048112, now seen corresponding path program 1 times [2022-11-20 19:46:09,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:09,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109990852] [2022-11-20 19:46:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:09,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-20 19:46:09,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:09,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109990852] [2022-11-20 19:46:09,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109990852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:46:09,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098846090] [2022-11-20 19:46:09,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:09,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:09,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:46:09,929 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:46:09,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 19:46:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:10,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 19:46:10,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:46:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 19:46:10,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:46:10,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098846090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:10,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:46:10,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-20 19:46:10,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342203577] [2022-11-20 19:46:10,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:10,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:46:10,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:10,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:46:10,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:46:10,357 INFO L87 Difference]: Start difference. First operand 2260 states and 3676 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-20 19:46:10,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:10,802 INFO L93 Difference]: Finished difference Result 4664 states and 7682 transitions. [2022-11-20 19:46:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:46:10,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 137 [2022-11-20 19:46:10,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:10,819 INFO L225 Difference]: With dead ends: 4664 [2022-11-20 19:46:10,819 INFO L226 Difference]: Without dead ends: 2416 [2022-11-20 19:46:10,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:46:10,834 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 207 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:10,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1359 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 19:46:10,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2022-11-20 19:46:10,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2416. [2022-11-20 19:46:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 1793 states have (on average 1.645287228109314) internal successors, (2950), 1865 states have internal predecessors, (2950), 479 states have call successors, (479), 137 states have call predecessors, (479), 143 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-11-20 19:46:10,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 3968 transitions. [2022-11-20 19:46:10,988 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 3968 transitions. Word has length 137 [2022-11-20 19:46:10,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:10,989 INFO L495 AbstractCegarLoop]: Abstraction has 2416 states and 3968 transitions. [2022-11-20 19:46:10,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-20 19:46:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 3968 transitions. [2022-11-20 19:46:10,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-20 19:46:10,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:10,995 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 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] [2022-11-20 19:46:11,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 19:46:11,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 19:46:11,204 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:46:11,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:11,205 INFO L85 PathProgramCache]: Analyzing trace with hash -805690754, now seen corresponding path program 1 times [2022-11-20 19:46:11,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:11,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280325094] [2022-11-20 19:46:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:11,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-20 19:46:11,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:11,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280325094] [2022-11-20 19:46:11,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280325094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:46:11,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044231603] [2022-11-20 19:46:11,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:11,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:11,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:46:11,643 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:46:11,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 19:46:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:12,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 1526 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-20 19:46:12,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:46:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-20 19:46:13,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:47:07,120 WARN L233 SmtUtils]: Spent 49.87s 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) [2022-11-20 19:47:57,881 WARN L233 SmtUtils]: Spent 49.16s 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) [2022-11-20 19:47:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-20 19:47:59,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044231603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:47:59,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [236273754] [2022-11-20 19:47:59,624 INFO L159 IcfgInterpreter]: Started Sifa with 99 locations of interest [2022-11-20 19:47:59,625 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:47:59,629 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:47:59,634 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:47:59,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:48:02,577 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2022-11-20 19:48:07,499 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 577 for LOIs [2022-11-20 19:48:33,453 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 75 for LOIs [2022-11-20 19:48:33,698 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 444 for LOIs [2022-11-20 19:48:34,417 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 508 for LOIs [2022-11-20 19:48:34,588 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 500 for LOIs [2022-11-20 19:48:35,779 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 41 for LOIs [2022-11-20 19:48:35,789 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 120 for LOIs [2022-11-20 19:48:35,824 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 38 for LOIs [2022-11-20 19:48:35,827 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-11-20 19:48:39,282 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-11-20 19:48:39,868 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-11-20 19:48:40,009 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:49:03,113 WARN L233 SmtUtils]: Spent 7.32s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:49:10,911 WARN L233 SmtUtils]: Spent 7.38s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:49:20,294 WARN L233 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 778 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:49:37,274 WARN L233 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 618 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:49:43,628 WARN L233 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 616 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:49:58,024 WARN L233 SmtUtils]: Spent 5.86s on a formula simplification. DAG size of input: 617 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:50:04,643 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 617 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:50:11,244 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 613 DAG size of output: 587 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:51:05,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '64666#(and (= |old(~floorButtons_2~0)| 0) (= ~executiveFloor~0 4) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1|) (= |old(~persons_1~0)| 0) (= |old(~persons_5~0)| 0) (= |old(~doorState~0)| 1) (= |old(~persons_2~0)| 0) (= ~persons_5~0 0) (= |old(~persons_4~0)| 0) (= |old(~floorButtons_0~0)| 0) (<= |timeShift_~tmp~13#1| 1) (= |old(~blocked~0)| 0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_isExecutiveFloor_~retValue_acc~21#1| 0) (= ~head~0.offset 0) (= |old(~weight~0)| 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (= ~persons_4~0 0) (<= 1 |timeShift_~tmp~13#1|) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~0#1|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= ~persons_3~0 0) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1|) (= |old(~floorButtons_4~0)| 0) (<= 0 (+ |timeShift_isExecutiveFloor_~floorID#1| 2147483648)) (= |old(~persons_0~0)| 0) (= ~doorState~0 1) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (= |old(~persons_3~0)| 0) (= ~persons_1~0 0) (= ~persons_0~0 0) (= |old(~floorButtons_3~0)| 0) (= ~head~0.base 0) (= |#NULL.offset| 0) (= |timeShift_isExecutiveFloor_~retValue_acc~21#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (= ~blocked~0 0) (= |old(~currentHeading~0)| 1) (<= |timeShift_isExecutiveFloor_#in~floorID#1| 2147483647) (= |old(~personOnFloor_5_1~0)| 1) (= 1 |old(~calls_1~0)|) (= |old(~floorButtons_1~0)| 0) (= |old(~currentFloorID~0)| 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2022-11-20 19:51:05,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:51:05,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:51:05,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16, 16] total 35 [2022-11-20 19:51:05,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996501643] [2022-11-20 19:51:05,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:51:05,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 19:51:05,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:51:05,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 19:51:05,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=939, Invalid=8567, Unknown=0, NotChecked=0, Total=9506 [2022-11-20 19:51:05,542 INFO L87 Difference]: Start difference. First operand 2416 states and 3968 transitions. Second operand has 35 states, 26 states have (on average 7.3076923076923075) internal successors, (190), 28 states have internal predecessors, (190), 13 states have call successors, (55), 9 states have call predecessors, (55), 18 states have return successors, (54), 19 states have call predecessors, (54), 13 states have call successors, (54) [2022-11-20 19:51:40,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:51:40,381 INFO L93 Difference]: Finished difference Result 10515 states and 18062 transitions. [2022-11-20 19:51:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-11-20 19:51:40,382 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 26 states have (on average 7.3076923076923075) internal successors, (190), 28 states have internal predecessors, (190), 13 states have call successors, (55), 9 states have call predecessors, (55), 18 states have return successors, (54), 19 states have call predecessors, (54), 13 states have call successors, (54) Word has length 139 [2022-11-20 19:51:40,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:51:40,440 INFO L225 Difference]: With dead ends: 10515 [2022-11-20 19:51:40,440 INFO L226 Difference]: Without dead ends: 6534 [2022-11-20 19:51:40,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 329 SyntacticMatches, 22 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15892 ImplicationChecksByTransitivity, 152.0s TimeCoverageRelationStatistics Valid=3351, Invalid=36449, Unknown=0, NotChecked=0, Total=39800 [2022-11-20 19:51:40,478 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 7535 mSDsluCounter, 9091 mSDsCounter, 0 mSdLazyCounter, 32447 mSolverCounterSat, 5824 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7582 SdHoareTripleChecker+Valid, 9814 SdHoareTripleChecker+Invalid, 38271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 5824 IncrementalHoareTripleChecker+Valid, 32447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.5s IncrementalHoareTripleChecker+Time [2022-11-20 19:51:40,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7582 Valid, 9814 Invalid, 38271 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [5824 Valid, 32447 Invalid, 0 Unknown, 0 Unchecked, 27.5s Time] [2022-11-20 19:51:40,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6534 states. [2022-11-20 19:51:41,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6534 to 5871. [2022-11-20 19:51:41,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5871 states, 4170 states have (on average 1.5553956834532374) internal successors, (6486), 4425 states have internal predecessors, (6486), 1281 states have call successors, (1281), 369 states have call predecessors, (1281), 419 states have return successors, (1648), 1180 states have call predecessors, (1648), 1275 states have call successors, (1648) [2022-11-20 19:51:41,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5871 states to 5871 states and 9415 transitions. [2022-11-20 19:51:41,212 INFO L78 Accepts]: Start accepts. Automaton has 5871 states and 9415 transitions. Word has length 139 [2022-11-20 19:51:41,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:51:41,213 INFO L495 AbstractCegarLoop]: Abstraction has 5871 states and 9415 transitions. [2022-11-20 19:51:41,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 26 states have (on average 7.3076923076923075) internal successors, (190), 28 states have internal predecessors, (190), 13 states have call successors, (55), 9 states have call predecessors, (55), 18 states have return successors, (54), 19 states have call predecessors, (54), 13 states have call successors, (54) [2022-11-20 19:51:41,214 INFO L276 IsEmpty]: Start isEmpty. Operand 5871 states and 9415 transitions. [2022-11-20 19:51:41,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-20 19:51:41,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:51:41,225 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2022-11-20 19:51:41,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 19:51:41,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:51:41,435 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:51:41,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:51:41,435 INFO L85 PathProgramCache]: Analyzing trace with hash 440481421, now seen corresponding path program 1 times [2022-11-20 19:51:41,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:51:41,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935380323] [2022-11-20 19:51:41,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:51:41,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:51:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:51:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-20 19:51:41,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:51:41,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935380323] [2022-11-20 19:51:41,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935380323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:51:41,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385810905] [2022-11-20 19:51:41,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:51:41,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:51:41,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:51:41,773 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:51:41,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 19:51:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:51:42,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 1546 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 19:51:42,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:51:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-20 19:51:42,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:51:42,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385810905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:51:42,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:51:42,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 16 [2022-11-20 19:51:42,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317955214] [2022-11-20 19:51:42,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:51:42,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 19:51:42,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:51:42,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 19:51:42,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-20 19:51:42,903 INFO L87 Difference]: Start difference. First operand 5871 states and 9415 transitions. Second operand has 10 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-11-20 19:51:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:51:48,485 INFO L93 Difference]: Finished difference Result 13797 states and 22324 transitions. [2022-11-20 19:51:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 19:51:48,486 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 144 [2022-11-20 19:51:48,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:51:48,537 INFO L225 Difference]: With dead ends: 13797 [2022-11-20 19:51:48,538 INFO L226 Difference]: Without dead ends: 7940 [2022-11-20 19:51:48,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-11-20 19:51:48,568 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 2085 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 5211 mSolverCounterSat, 1191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2258 SdHoareTripleChecker+Valid, 1611 SdHoareTripleChecker+Invalid, 6402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1191 IncrementalHoareTripleChecker+Valid, 5211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-20 19:51:48,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2258 Valid, 1611 Invalid, 6402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1191 Valid, 5211 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-20 19:51:48,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7940 states. [2022-11-20 19:51:49,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7940 to 7626. [2022-11-20 19:51:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7626 states, 5532 states have (on average 1.546999276934201) internal successors, (8558), 5814 states have internal predecessors, (8558), 1529 states have call successors, (1529), 507 states have call predecessors, (1529), 564 states have return successors, (1957), 1415 states have call predecessors, (1957), 1521 states have call successors, (1957) [2022-11-20 19:51:49,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7626 states to 7626 states and 12044 transitions. [2022-11-20 19:51:49,424 INFO L78 Accepts]: Start accepts. Automaton has 7626 states and 12044 transitions. Word has length 144 [2022-11-20 19:51:49,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:51:49,425 INFO L495 AbstractCegarLoop]: Abstraction has 7626 states and 12044 transitions. [2022-11-20 19:51:49,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-11-20 19:51:49,426 INFO L276 IsEmpty]: Start isEmpty. Operand 7626 states and 12044 transitions. [2022-11-20 19:51:49,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-11-20 19:51:49,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:51:49,447 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 4, 4, 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, 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] [2022-11-20 19:51:49,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 19:51:49,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:51:49,656 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:51:49,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:51:49,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2035554040, now seen corresponding path program 1 times [2022-11-20 19:51:49,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:51:49,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607970055] [2022-11-20 19:51:49,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:51:49,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:51:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:51:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 22 proven. 63 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-11-20 19:51:50,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:51:50,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607970055] [2022-11-20 19:51:50,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607970055] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:51:50,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654901331] [2022-11-20 19:51:50,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:51:50,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:51:50,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:51:50,976 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:51:51,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 19:51:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:51:51,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 2747 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 19:51:51,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:51:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-11-20 19:51:52,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:51:52,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654901331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:51:52,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:51:52,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 24 [2022-11-20 19:51:52,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698372801] [2022-11-20 19:51:52,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:51:52,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 19:51:52,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:51:52,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 19:51:52,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-11-20 19:51:52,012 INFO L87 Difference]: Start difference. First operand 7626 states and 12044 transitions. Second operand has 10 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2022-11-20 19:51:55,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:51:55,704 INFO L93 Difference]: Finished difference Result 12968 states and 20387 transitions. [2022-11-20 19:51:55,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 19:51:55,705 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) Word has length 274 [2022-11-20 19:51:55,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:51:55,750 INFO L225 Difference]: With dead ends: 12968 [2022-11-20 19:51:55,750 INFO L226 Difference]: Without dead ends: 6680 [2022-11-20 19:51:55,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-11-20 19:51:55,777 INFO L413 NwaCegarLoop]: 748 mSDtfsCounter, 1207 mSDsluCounter, 2617 mSDsCounter, 0 mSdLazyCounter, 3681 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 3895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 3681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 19:51:55,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1227 Valid, 3365 Invalid, 3895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 3681 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-20 19:51:55,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2022-11-20 19:51:56,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 6542. [2022-11-20 19:51:56,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6542 states, 4681 states have (on average 1.5088656270027772) internal successors, (7063), 4908 states have internal predecessors, (7063), 1356 states have call successors, (1356), 477 states have call predecessors, (1356), 504 states have return successors, (1702), 1249 states have call predecessors, (1702), 1348 states have call successors, (1702) [2022-11-20 19:51:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6542 states to 6542 states and 10121 transitions. [2022-11-20 19:51:56,575 INFO L78 Accepts]: Start accepts. Automaton has 6542 states and 10121 transitions. Word has length 274 [2022-11-20 19:51:56,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:51:56,575 INFO L495 AbstractCegarLoop]: Abstraction has 6542 states and 10121 transitions. [2022-11-20 19:51:56,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2022-11-20 19:51:56,576 INFO L276 IsEmpty]: Start isEmpty. Operand 6542 states and 10121 transitions. [2022-11-20 19:51:56,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-11-20 19:51:56,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:51:56,594 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:51:56,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 19:51:56,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 19:51:56,804 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:51:56,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:51:56,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1451935026, now seen corresponding path program 1 times [2022-11-20 19:51:56,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:51:56,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848751158] [2022-11-20 19:51:56,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:51:56,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:51:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:51:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-20 19:51:57,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:51:57,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848751158] [2022-11-20 19:51:57,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848751158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:51:57,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404020072] [2022-11-20 19:51:57,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:51:57,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:51:57,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:51:57,175 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:51:57,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 19:51:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:51:57,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 2907 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 19:51:57,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:51:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-11-20 19:51:57,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:51:57,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404020072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:51:57,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:51:57,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-20 19:51:57,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623617981] [2022-11-20 19:51:57,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:51:57,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:51:57,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:51:57,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:51:57,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:51:57,841 INFO L87 Difference]: Start difference. First operand 6542 states and 10121 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-20 19:51:58,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:51:58,572 INFO L93 Difference]: Finished difference Result 13374 states and 20853 transitions. [2022-11-20 19:51:58,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:51:58,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 225 [2022-11-20 19:51:58,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:51:58,613 INFO L225 Difference]: With dead ends: 13374 [2022-11-20 19:51:58,613 INFO L226 Difference]: Without dead ends: 6846 [2022-11-20 19:51:58,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 19:51:58,642 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 205 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:51:58,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1359 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:51:58,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6846 states. [2022-11-20 19:51:59,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6846 to 6846. [2022-11-20 19:51:59,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6846 states, 4973 states have (on average 1.52604061934446) internal successors, (7589), 5202 states have internal predecessors, (7589), 1356 states have call successors, (1356), 487 states have call predecessors, (1356), 516 states have return successors, (1702), 1249 states have call predecessors, (1702), 1348 states have call successors, (1702) [2022-11-20 19:51:59,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6846 states to 6846 states and 10647 transitions. [2022-11-20 19:51:59,545 INFO L78 Accepts]: Start accepts. Automaton has 6846 states and 10647 transitions. Word has length 225 [2022-11-20 19:51:59,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:51:59,546 INFO L495 AbstractCegarLoop]: Abstraction has 6846 states and 10647 transitions. [2022-11-20 19:51:59,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-20 19:51:59,546 INFO L276 IsEmpty]: Start isEmpty. Operand 6846 states and 10647 transitions. [2022-11-20 19:51:59,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-11-20 19:51:59,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:51:59,567 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:51:59,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 19:51:59,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 19:51:59,776 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:51:59,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:51:59,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1782348588, now seen corresponding path program 1 times [2022-11-20 19:51:59,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:51:59,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075274537] [2022-11-20 19:51:59,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:51:59,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:51:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-20 19:52:00,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:00,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075274537] [2022-11-20 19:52:00,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075274537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:52:00,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870026229] [2022-11-20 19:52:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:00,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:00,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:00,153 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:52:00,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 19:52:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:00,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 2908 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 19:52:00,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-20 19:52:01,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-11-20 19:52:07,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870026229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:07,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1550810462] [2022-11-20 19:52:07,663 INFO L159 IcfgInterpreter]: Started Sifa with 123 locations of interest [2022-11-20 19:52:07,663 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:52:07,664 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:52:07,664 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:52:07,665 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:52:16,389 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 569 for LOIs [2022-11-20 19:52:16,869 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 38 for LOIs [2022-11-20 19:52:17,647 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 182 for LOIs [2022-11-20 19:52:20,037 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 80 for LOIs [2022-11-20 19:52:20,563 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 34 for LOIs [2022-11-20 19:52:20,635 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 58 for LOIs [2022-11-20 19:52:20,649 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 59 for LOIs [2022-11-20 19:52:20,766 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 31 for LOIs [2022-11-20 19:52:20,775 INFO L197 IcfgInterpreter]: Interpreting procedure leaveElevator with input of size 70 for LOIs [2022-11-20 19:52:21,002 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 56 for LOIs [2022-11-20 19:52:21,015 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 31 for LOIs [2022-11-20 19:52:21,017 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-11-20 19:52:24,626 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 36 for LOIs [2022-11-20 19:52:24,637 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 35 for LOIs [2022-11-20 19:52:24,647 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 521 for LOIs [2022-11-20 19:52:27,301 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 792 for LOIs [2022-11-20 19:52:36,893 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 645 for LOIs [2022-11-20 19:52:37,371 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:52:52,556 WARN L233 SmtUtils]: Spent 6.52s on a formula simplification. DAG size of input: 645 DAG size of output: 582 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:52:59,777 WARN L233 SmtUtils]: Spent 6.80s on a formula simplification. DAG size of input: 685 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:53:07,739 WARN L233 SmtUtils]: Spent 7.66s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:53:15,815 WARN L233 SmtUtils]: Spent 7.73s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:53:30,227 WARN L233 SmtUtils]: Spent 13.86s on a formula simplification. DAG size of input: 792 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:53:47,657 WARN L233 SmtUtils]: Spent 16.76s on a formula simplification. DAG size of input: 803 DAG size of output: 784 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:54:48,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '172166#(and (<= |old(~doorState~0)| 2147483647) (= ~executiveFloor~0 4) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~0#1| 0)) (<= 0 (+ |old(~doorState~0)| 2147483648)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_isExecutiveFloor_~retValue_acc~21#1| 0) (= ~head~0.offset 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~0#1|)) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~0#1|) (<= 0 |old(~blocked~0)|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1|) (<= 0 (+ |timeShift_isExecutiveFloor_~floorID#1| 2147483648)) (<= |timeShift_~tmp~13#1| 2147483647) (<= |old(~blocked~0)| 1) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= ~doorState~0 2147483647) (<= 0 (+ 2147483648 |timeShift_~tmp~13#1|)) (<= ~blocked~0 1) (= |timeShift_isExecutiveFloor_~retValue_acc~21#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_isExecutiveFloor_#in~floorID#1| 2147483647) (<= 0 ~blocked~0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-11-20 19:54:48,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:54:48,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:54:48,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 13] total 27 [2022-11-20 19:54:48,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182732885] [2022-11-20 19:54:48,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:54:48,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 19:54:48,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:54:48,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 19:54:48,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1156, Invalid=12886, Unknown=0, NotChecked=0, Total=14042 [2022-11-20 19:54:48,620 INFO L87 Difference]: Start difference. First operand 6846 states and 10647 transitions. Second operand has 27 states, 19 states have (on average 12.473684210526315) internal successors, (237), 22 states have internal predecessors, (237), 20 states have call successors, (87), 10 states have call predecessors, (87), 14 states have return successors, (85), 20 states have call predecessors, (85), 20 states have call successors, (85) [2022-11-20 19:55:35,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:55:35,759 INFO L93 Difference]: Finished difference Result 35773 states and 57395 transitions. [2022-11-20 19:55:35,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-20 19:55:35,760 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 19 states have (on average 12.473684210526315) internal successors, (237), 22 states have internal predecessors, (237), 20 states have call successors, (87), 10 states have call predecessors, (87), 14 states have return successors, (85), 20 states have call predecessors, (85), 20 states have call successors, (85) Word has length 226 [2022-11-20 19:55:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:55:35,973 INFO L225 Difference]: With dead ends: 35773 [2022-11-20 19:55:35,973 INFO L226 Difference]: Without dead ends: 27374 [2022-11-20 19:55:36,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 558 SyntacticMatches, 23 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14940 ImplicationChecksByTransitivity, 137.5s TimeCoverageRelationStatistics Valid=2585, Invalid=29635, Unknown=0, NotChecked=0, Total=32220 [2022-11-20 19:55:36,046 INFO L413 NwaCegarLoop]: 1110 mSDtfsCounter, 11034 mSDsluCounter, 8617 mSDsCounter, 0 mSdLazyCounter, 32172 mSolverCounterSat, 11404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11085 SdHoareTripleChecker+Valid, 9727 SdHoareTripleChecker+Invalid, 43576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 11404 IncrementalHoareTripleChecker+Valid, 32172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:55:36,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11085 Valid, 9727 Invalid, 43576 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [11404 Valid, 32172 Invalid, 0 Unknown, 0 Unchecked, 37.0s Time] [2022-11-20 19:55:36,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27374 states. [2022-11-20 19:55:38,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27374 to 21718. [2022-11-20 19:55:38,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21718 states, 15478 states have (on average 1.531787052590774) internal successors, (23709), 16371 states have internal predecessors, (23709), 4702 states have call successors, (4702), 1423 states have call predecessors, (4702), 1537 states have return successors, (5821), 4171 states have call predecessors, (5821), 4676 states have call successors, (5821) [2022-11-20 19:55:38,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21718 states to 21718 states and 34232 transitions. [2022-11-20 19:55:38,911 INFO L78 Accepts]: Start accepts. Automaton has 21718 states and 34232 transitions. Word has length 226 [2022-11-20 19:55:38,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:55:38,912 INFO L495 AbstractCegarLoop]: Abstraction has 21718 states and 34232 transitions. [2022-11-20 19:55:38,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 19 states have (on average 12.473684210526315) internal successors, (237), 22 states have internal predecessors, (237), 20 states have call successors, (87), 10 states have call predecessors, (87), 14 states have return successors, (85), 20 states have call predecessors, (85), 20 states have call successors, (85) [2022-11-20 19:55:38,913 INFO L276 IsEmpty]: Start isEmpty. Operand 21718 states and 34232 transitions. [2022-11-20 19:55:38,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-11-20 19:55:38,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:55:38,945 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 14, 14, 14, 10, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:55:38,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 19:55:39,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:55:39,156 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:55:39,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:55:39,156 INFO L85 PathProgramCache]: Analyzing trace with hash 150656706, now seen corresponding path program 1 times [2022-11-20 19:55:39,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:55:39,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729432557] [2022-11-20 19:55:39,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:55:39,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:55:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:55:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 67 proven. 23 refuted. 0 times theorem prover too weak. 1033 trivial. 0 not checked. [2022-11-20 19:55:40,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:55:40,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729432557] [2022-11-20 19:55:40,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729432557] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:55:40,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218636691] [2022-11-20 19:55:40,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:55:40,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:55:40,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:55:40,113 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:55:40,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 19:55:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:55:41,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 4508 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 19:55:41,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:55:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2022-11-20 19:55:41,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:55:41,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218636691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:55:41,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:55:41,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2022-11-20 19:55:41,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928197617] [2022-11-20 19:55:41,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:55:41,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 19:55:41,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:55:41,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 19:55:41,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-11-20 19:55:41,815 INFO L87 Difference]: Start difference. First operand 21718 states and 34232 transitions. Second operand has 10 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 4 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2022-11-20 19:55:47,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:55:47,133 INFO L93 Difference]: Finished difference Result 39795 states and 63141 transitions. [2022-11-20 19:55:47,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 19:55:47,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 4 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) Word has length 433 [2022-11-20 19:55:47,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:55:47,274 INFO L225 Difference]: With dead ends: 39795 [2022-11-20 19:55:47,274 INFO L226 Difference]: Without dead ends: 21760 [2022-11-20 19:55:47,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-11-20 19:55:47,350 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 1228 mSDsluCounter, 2597 mSDsCounter, 0 mSdLazyCounter, 3756 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1248 SdHoareTripleChecker+Valid, 3348 SdHoareTripleChecker+Invalid, 3979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 3756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 19:55:47,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1248 Valid, 3348 Invalid, 3979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 3756 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-20 19:55:47,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21760 states. [2022-11-20 19:55:49,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21760 to 21190. [2022-11-20 19:55:49,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21190 states, 14950 states have (on average 1.5120401337792642) internal successors, (22605), 15843 states have internal predecessors, (22605), 4702 states have call successors, (4702), 1423 states have call predecessors, (4702), 1537 states have return successors, (5821), 4171 states have call predecessors, (5821), 4676 states have call successors, (5821) [2022-11-20 19:55:49,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21190 states to 21190 states and 33128 transitions. [2022-11-20 19:55:49,759 INFO L78 Accepts]: Start accepts. Automaton has 21190 states and 33128 transitions. Word has length 433 [2022-11-20 19:55:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:55:49,761 INFO L495 AbstractCegarLoop]: Abstraction has 21190 states and 33128 transitions. [2022-11-20 19:55:49,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 4 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2022-11-20 19:55:49,762 INFO L276 IsEmpty]: Start isEmpty. Operand 21190 states and 33128 transitions. [2022-11-20 19:55:49,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-11-20 19:55:49,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:55:49,792 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:55:49,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 19:55:50,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 19:55:50,006 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:55:50,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:55:50,007 INFO L85 PathProgramCache]: Analyzing trace with hash 473421060, now seen corresponding path program 1 times [2022-11-20 19:55:50,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:55:50,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182083808] [2022-11-20 19:55:50,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:55:50,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:55:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:55:50,595 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-11-20 19:55:50,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:55:50,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182083808] [2022-11-20 19:55:50,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182083808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:55:50,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670237224] [2022-11-20 19:55:50,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:55:50,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:55:50,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:55:50,597 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:55:50,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 19:55:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:55:51,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 2156 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 19:55:51,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:55:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-20 19:55:51,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:55:51,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670237224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:55:51,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:55:51,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 17 [2022-11-20 19:55:51,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480412947] [2022-11-20 19:55:51,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:55:51,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 19:55:51,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:55:51,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 19:55:51,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-11-20 19:55:51,485 INFO L87 Difference]: Start difference. First operand 21190 states and 33128 transitions. Second operand has 10 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-20 19:55:56,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:55:56,689 INFO L93 Difference]: Finished difference Result 38739 states and 60933 transitions. [2022-11-20 19:55:56,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 19:55:56,695 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 219 [2022-11-20 19:55:56,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:55:57,005 INFO L225 Difference]: With dead ends: 38739 [2022-11-20 19:55:57,006 INFO L226 Difference]: Without dead ends: 21232 [2022-11-20 19:55:57,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-11-20 19:55:57,080 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 1268 mSDsluCounter, 2585 mSDsCounter, 0 mSdLazyCounter, 3755 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 4035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 3755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 19:55:57,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1288 Valid, 3336 Invalid, 4035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 3755 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-20 19:55:57,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21232 states. [2022-11-20 19:55:59,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21232 to 20662. [2022-11-20 19:55:59,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20662 states, 14422 states have (on average 1.4908473165996394) internal successors, (21501), 15315 states have internal predecessors, (21501), 4702 states have call successors, (4702), 1423 states have call predecessors, (4702), 1537 states have return successors, (5821), 4171 states have call predecessors, (5821), 4676 states have call successors, (5821) [2022-11-20 19:55:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20662 states to 20662 states and 32024 transitions. [2022-11-20 19:55:59,276 INFO L78 Accepts]: Start accepts. Automaton has 20662 states and 32024 transitions. Word has length 219 [2022-11-20 19:55:59,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:55:59,277 INFO L495 AbstractCegarLoop]: Abstraction has 20662 states and 32024 transitions. [2022-11-20 19:55:59,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-20 19:55:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 20662 states and 32024 transitions. [2022-11-20 19:55:59,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-11-20 19:55:59,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:55:59,304 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:55:59,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 19:55:59,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 19:55:59,519 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:55:59,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:55:59,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1481375518, now seen corresponding path program 1 times [2022-11-20 19:55:59,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:55:59,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833189246] [2022-11-20 19:55:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:55:59,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:55:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:55:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-11-20 19:55:59,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:55:59,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833189246] [2022-11-20 19:55:59,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833189246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:55:59,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887020716] [2022-11-20 19:55:59,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:55:59,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:55:59,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:55:59,983 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:56:00,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 19:56:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:56:00,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 2155 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 19:56:00,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:56:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-20 19:56:00,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:56:00,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887020716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:56:00,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:56:00,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2022-11-20 19:56:00,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176253843] [2022-11-20 19:56:00,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:56:00,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 19:56:00,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:56:00,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 19:56:00,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-11-20 19:56:00,844 INFO L87 Difference]: Start difference. First operand 20662 states and 32024 transitions. Second operand has 10 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-20 19:56:06,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:56:06,112 INFO L93 Difference]: Finished difference Result 37683 states and 58725 transitions. [2022-11-20 19:56:06,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 19:56:06,113 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 220 [2022-11-20 19:56:06,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:56:06,425 INFO L225 Difference]: With dead ends: 37683 [2022-11-20 19:56:06,426 INFO L226 Difference]: Without dead ends: 20704 [2022-11-20 19:56:06,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-11-20 19:56:06,527 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 1206 mSDsluCounter, 2573 mSDsCounter, 0 mSdLazyCounter, 3754 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1226 SdHoareTripleChecker+Valid, 3324 SdHoareTripleChecker+Invalid, 3979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 3754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 19:56:06,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1226 Valid, 3324 Invalid, 3979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 3754 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-20 19:56:06,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20704 states. [2022-11-20 19:56:09,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20704 to 20134. [2022-11-20 19:56:09,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20134 states, 13894 states have (on average 1.468043759896358) internal successors, (20397), 14787 states have internal predecessors, (20397), 4702 states have call successors, (4702), 1423 states have call predecessors, (4702), 1537 states have return successors, (5821), 4171 states have call predecessors, (5821), 4676 states have call successors, (5821) [2022-11-20 19:56:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20134 states to 20134 states and 30920 transitions. [2022-11-20 19:56:09,332 INFO L78 Accepts]: Start accepts. Automaton has 20134 states and 30920 transitions. Word has length 220 [2022-11-20 19:56:09,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:56:09,333 INFO L495 AbstractCegarLoop]: Abstraction has 20134 states and 30920 transitions. [2022-11-20 19:56:09,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-20 19:56:09,333 INFO L276 IsEmpty]: Start isEmpty. Operand 20134 states and 30920 transitions. [2022-11-20 19:56:09,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2022-11-20 19:56:09,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:56:09,357 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 11, 11, 11, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:56:09,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 19:56:09,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:56:09,567 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:56:09,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:56:09,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1582434158, now seen corresponding path program 1 times [2022-11-20 19:56:09,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:56:09,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533858606] [2022-11-20 19:56:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:56:09,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:56:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:56:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 47 proven. 41 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2022-11-20 19:56:10,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:56:10,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533858606] [2022-11-20 19:56:10,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533858606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:56:10,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926668143] [2022-11-20 19:56:10,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:56:10,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:56:10,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:56:10,377 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:56:10,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 19:56:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:56:11,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 3868 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 19:56:11,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:56:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-20 19:56:11,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:56:11,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926668143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:56:11,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:56:11,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2022-11-20 19:56:11,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573620426] [2022-11-20 19:56:11,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:56:11,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 19:56:11,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:56:11,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 19:56:11,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-20 19:56:11,762 INFO L87 Difference]: Start difference. First operand 20134 states and 30920 transitions. Second operand has 10 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2022-11-20 19:56:17,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:56:17,566 INFO L93 Difference]: Finished difference Result 38180 states and 59430 transitions. [2022-11-20 19:56:17,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 19:56:17,566 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) Word has length 364 [2022-11-20 19:56:17,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:56:17,707 INFO L225 Difference]: With dead ends: 38180 [2022-11-20 19:56:17,707 INFO L226 Difference]: Without dead ends: 20640 [2022-11-20 19:56:17,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-11-20 19:56:17,813 INFO L413 NwaCegarLoop]: 750 mSDtfsCounter, 1183 mSDsluCounter, 2572 mSDsCounter, 0 mSdLazyCounter, 3730 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1203 SdHoareTripleChecker+Valid, 3322 SdHoareTripleChecker+Invalid, 3957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 3730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 19:56:17,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1203 Valid, 3322 Invalid, 3957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 3730 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-20 19:56:17,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20640 states. [2022-11-20 19:56:20,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20640 to 20070. [2022-11-20 19:56:20,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20070 states, 13840 states have (on average 1.4604768786127167) internal successors, (20213), 14733 states have internal predecessors, (20213), 4692 states have call successors, (4692), 1423 states have call predecessors, (4692), 1537 states have return successors, (5811), 4161 states have call predecessors, (5811), 4666 states have call successors, (5811) [2022-11-20 19:56:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20070 states to 20070 states and 30716 transitions. [2022-11-20 19:56:20,653 INFO L78 Accepts]: Start accepts. Automaton has 20070 states and 30716 transitions. Word has length 364 [2022-11-20 19:56:20,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:56:20,654 INFO L495 AbstractCegarLoop]: Abstraction has 20070 states and 30716 transitions. [2022-11-20 19:56:20,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2022-11-20 19:56:20,654 INFO L276 IsEmpty]: Start isEmpty. Operand 20070 states and 30716 transitions. [2022-11-20 19:56:20,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-20 19:56:20,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:56:20,670 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:56:20,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 19:56:20,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 19:56:20,871 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:56:20,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:56:20,871 INFO L85 PathProgramCache]: Analyzing trace with hash -2053678225, now seen corresponding path program 1 times [2022-11-20 19:56:20,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:56:20,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558609276] [2022-11-20 19:56:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:56:20,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:56:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:56:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 27 proven. 52 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-20 19:56:24,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:56:24,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558609276] [2022-11-20 19:56:24,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558609276] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:56:24,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136515137] [2022-11-20 19:56:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:56:24,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:56:24,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:56:24,891 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:56:24,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 19:56:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:56:25,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 3079 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 19:56:25,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:56:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-20 19:56:26,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:56:26,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136515137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:56:26,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:56:26,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [25] total 36 [2022-11-20 19:56:26,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901590611] [2022-11-20 19:56:26,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:56:26,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 19:56:26,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:56:26,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 19:56:26,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 19:56:26,776 INFO L87 Difference]: Start difference. First operand 20070 states and 30716 transitions. Second operand has 13 states, 9 states have (on average 11.777777777777779) internal successors, (106), 10 states have internal predecessors, (106), 9 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-11-20 19:56:37,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:56:37,709 INFO L93 Difference]: Finished difference Result 31323 states and 48564 transitions. [2022-11-20 19:56:37,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 19:56:37,710 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 11.777777777777779) internal successors, (106), 10 states have internal predecessors, (106), 9 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) Word has length 235 [2022-11-20 19:56:37,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:56:37,900 INFO L225 Difference]: With dead ends: 31323 [2022-11-20 19:56:37,900 INFO L226 Difference]: Without dead ends: 31017 [2022-11-20 19:56:37,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=250, Invalid=2006, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 19:56:37,936 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 4202 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 5237 mSolverCounterSat, 2034 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4361 SdHoareTripleChecker+Valid, 1873 SdHoareTripleChecker+Invalid, 7271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2034 IncrementalHoareTripleChecker+Valid, 5237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-20 19:56:37,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4361 Valid, 1873 Invalid, 7271 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2034 Valid, 5237 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-20 19:56:37,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31017 states. [2022-11-20 19:56:41,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31017 to 28895. [2022-11-20 19:56:41,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28895 states, 19847 states have (on average 1.457348717690331) internal successors, (28924), 21079 states have internal predecessors, (28924), 6876 states have call successors, (6876), 1973 states have call predecessors, (6876), 2171 states have return successors, (8727), 6136 states have call predecessors, (8727), 6842 states have call successors, (8727) [2022-11-20 19:56:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28895 states to 28895 states and 44527 transitions. [2022-11-20 19:56:41,495 INFO L78 Accepts]: Start accepts. Automaton has 28895 states and 44527 transitions. Word has length 235 [2022-11-20 19:56:41,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:56:41,496 INFO L495 AbstractCegarLoop]: Abstraction has 28895 states and 44527 transitions. [2022-11-20 19:56:41,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 11.777777777777779) internal successors, (106), 10 states have internal predecessors, (106), 9 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-11-20 19:56:41,496 INFO L276 IsEmpty]: Start isEmpty. Operand 28895 states and 44527 transitions. [2022-11-20 19:56:41,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-20 19:56:41,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:56:41,524 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:56:41,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 19:56:41,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:56:41,735 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:56:41,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:56:41,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1169482875, now seen corresponding path program 1 times [2022-11-20 19:56:41,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:56:41,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615529783] [2022-11-20 19:56:41,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:56:41,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:56:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:56:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 57 proven. 25 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-20 19:56:43,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:56:43,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615529783] [2022-11-20 19:56:43,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615529783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:56:43,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282582981] [2022-11-20 19:56:43,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:56:43,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:56:43,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:56:43,877 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:56:43,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 19:56:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:56:44,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 3079 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-20 19:56:44,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:56:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-20 19:56:45,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:56:45,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282582981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:56:45,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:56:45,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [19] total 22 [2022-11-20 19:56:45,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145441927] [2022-11-20 19:56:45,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:56:45,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 19:56:45,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:56:45,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 19:56:45,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-11-20 19:56:45,376 INFO L87 Difference]: Start difference. First operand 28895 states and 44527 transitions. Second operand has 12 states, 9 states have (on average 11.0) internal successors, (99), 10 states have internal predecessors, (99), 6 states have call successors, (36), 3 states have call predecessors, (36), 7 states have return successors, (34), 7 states have call predecessors, (34), 6 states have call successors, (34) [2022-11-20 19:56:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:56:51,718 INFO L93 Difference]: Finished difference Result 41461 states and 64330 transitions. [2022-11-20 19:56:51,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 19:56:51,719 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 11.0) internal successors, (99), 10 states have internal predecessors, (99), 6 states have call successors, (36), 3 states have call predecessors, (36), 7 states have return successors, (34), 7 states have call predecessors, (34), 6 states have call successors, (34) Word has length 235 [2022-11-20 19:56:51,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:56:51,852 INFO L225 Difference]: With dead ends: 41461 [2022-11-20 19:56:51,852 INFO L226 Difference]: Without dead ends: 29612 [2022-11-20 19:56:51,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-11-20 19:56:51,910 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 714 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 3862 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 4240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 3862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 19:56:51,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 1263 Invalid, 4240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 3862 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-20 19:56:51,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29612 states. [2022-11-20 19:56:55,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29612 to 28983. [2022-11-20 19:56:55,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28983 states, 20013 states have (on average 1.4511067805926148) internal successors, (29041), 21170 states have internal predecessors, (29041), 6758 states have call successors, (6758), 1973 states have call predecessors, (6758), 2211 states have return successors, (8725), 6127 states have call predecessors, (8725), 6724 states have call successors, (8725) [2022-11-20 19:56:55,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28983 states to 28983 states and 44524 transitions. [2022-11-20 19:56:55,614 INFO L78 Accepts]: Start accepts. Automaton has 28983 states and 44524 transitions. Word has length 235 [2022-11-20 19:56:55,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:56:55,615 INFO L495 AbstractCegarLoop]: Abstraction has 28983 states and 44524 transitions. [2022-11-20 19:56:55,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 11.0) internal successors, (99), 10 states have internal predecessors, (99), 6 states have call successors, (36), 3 states have call predecessors, (36), 7 states have return successors, (34), 7 states have call predecessors, (34), 6 states have call successors, (34) [2022-11-20 19:56:55,615 INFO L276 IsEmpty]: Start isEmpty. Operand 28983 states and 44524 transitions. [2022-11-20 19:56:55,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-11-20 19:56:55,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:56:55,647 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:56:55,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-20 19:56:55,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:56:55,859 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:56:55,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:56:55,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1481511972, now seen corresponding path program 1 times [2022-11-20 19:56:55,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:56:55,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227034974] [2022-11-20 19:56:55,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:56:55,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:56:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:56:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-11-20 19:56:56,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:56:56,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227034974] [2022-11-20 19:56:56,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227034974] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:56:56,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510830562] [2022-11-20 19:56:56,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:56:56,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:56:56,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:56:56,152 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:56:56,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c09a1f0-21b8-4c38-abdc-6fa67b452199/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 19:56:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:56:56,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 3176 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 19:56:56,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:56:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 94 proven. 1 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-11-20 19:56:57,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:56:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-11-20 19:56:59,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510830562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:56:59,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [314498889] [2022-11-20 19:56:59,068 INFO L159 IcfgInterpreter]: Started Sifa with 138 locations of interest [2022-11-20 19:56:59,068 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:56:59,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:56:59,069 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:56:59,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:57:07,075 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 572 for LOIs [2022-11-20 19:57:07,570 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 42 for LOIs [2022-11-20 19:57:07,980 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 183 for LOIs [2022-11-20 19:57:09,188 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 39 for LOIs [2022-11-20 19:57:09,194 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 35 for LOIs [2022-11-20 19:57:09,264 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 66 for LOIs [2022-11-20 19:57:09,278 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 63 for LOIs [2022-11-20 19:57:09,397 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 51 for LOIs [2022-11-20 19:57:09,420 INFO L197 IcfgInterpreter]: Interpreting procedure leaveElevator with input of size 73 for LOIs [2022-11-20 19:57:09,748 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 35 for LOIs [2022-11-20 19:57:09,751 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-11-20 19:57:13,383 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 40 for LOIs [2022-11-20 19:57:13,394 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 39 for LOIs [2022-11-20 19:57:13,404 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 525 for LOIs [2022-11-20 19:57:15,840 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 798 for LOIs