./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur --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 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c --- 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-38b53e6 [2022-11-26 00:26:48,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:26:48,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:26:48,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:26:48,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:26:48,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:26:48,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:26:48,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:26:48,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:26:48,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:26:48,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:26:48,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:26:48,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:26:48,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:26:48,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:26:48,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:26:48,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:26:48,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:26:48,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:26:48,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:26:48,296 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:26:48,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:26:48,300 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:26:48,301 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:26:48,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:26:48,311 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:26:48,312 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:26:48,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:26:48,314 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:26:48,315 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:26:48,316 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:26:48,317 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:26:48,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:26:48,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:26:48,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:26:48,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:26:48,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:26:48,323 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:26:48,323 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:26:48,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:26:48,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:26:48,327 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:26:48,375 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:26:48,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:26:48,376 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:26:48,376 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:26:48,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:26:48,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:26:48,378 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:26:48,378 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:26:48,378 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:26:48,379 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:26:48,380 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:26:48,380 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:26:48,380 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:26:48,380 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:26:48,381 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:26:48,381 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:26:48,381 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:26:48,381 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:26:48,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:26:48,383 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:26:48,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:26:48,383 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:26:48,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:26:48,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:26:48,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:26:48,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:26:48,385 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:26:48,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:26:48,385 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:26:48,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:26:48,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:26:48,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:26:48,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:26:48,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:26:48,387 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:26:48,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:26:48,388 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:26:48,388 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:26:48,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:26:48,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:26:48,389 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:26:48,389 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_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c [2022-11-26 00:26:48,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:26:48,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:26:48,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:26:48,693 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:26:48,694 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:26:48,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2022-11-26 00:26:51,559 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:26:51,939 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:26:51,954 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2022-11-26 00:26:51,974 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/data/6a3234bd6/99e06f5973fe4fefb66bd0ec5c2b47d9/FLAG33e69519f [2022-11-26 00:26:51,989 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/data/6a3234bd6/99e06f5973fe4fefb66bd0ec5c2b47d9 [2022-11-26 00:26:51,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:26:51,993 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:26:51,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:26:51,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:26:51,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:26:51,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:26:51" (1/1) ... [2022-11-26 00:26:52,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9dd1603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:26:52, skipping insertion in model container [2022-11-26 00:26:52,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:26:51" (1/1) ... [2022-11-26 00:26:52,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:26:52,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:26:52,641 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_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2022-11-26 00:26:52,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:26:52,664 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:26:52,778 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_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2022-11-26 00:26:52,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:26:52,803 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:26:52,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:26:52 WrapperNode [2022-11-26 00:26:52,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:26:52,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:26:52,805 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:26:52,805 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:26:52,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:26:52" (1/1) ... [2022-11-26 00:26:52,853 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:26:52" (1/1) ... [2022-11-26 00:26:52,911 INFO L138 Inliner]: procedures = 89, calls = 329, calls flagged for inlining = 24, calls inlined = 21, statements flattened = 1003 [2022-11-26 00:26:52,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:26:52,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:26:52,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:26:52,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:26:52,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:26:52" (1/1) ... [2022-11-26 00:26:52,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:26:52" (1/1) ... [2022-11-26 00:26:52,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:26:52" (1/1) ... [2022-11-26 00:26:52,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:26:52" (1/1) ... [2022-11-26 00:26:52,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:26:52" (1/1) ... [2022-11-26 00:26:52,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:26:52" (1/1) ... [2022-11-26 00:26:53,002 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:26:52" (1/1) ... [2022-11-26 00:26:53,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:26:52" (1/1) ... [2022-11-26 00:26:53,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:26:53,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:26:53,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:26:53,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:26:53,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:26:52" (1/1) ... [2022-11-26 00:26:53,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:26:53,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:26:53,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:26:53,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:26:53,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:26:53,133 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-26 00:26:53,133 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-26 00:26:53,133 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-26 00:26:53,133 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-26 00:26:53,133 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-26 00:26:53,133 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-26 00:26:53,134 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-26 00:26:53,134 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-26 00:26:53,134 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-26 00:26:53,134 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-26 00:26:53,134 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-26 00:26:53,135 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-26 00:26:53,135 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-26 00:26:53,135 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-26 00:26:53,135 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-26 00:26:53,135 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-26 00:26:53,135 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-26 00:26:53,136 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-26 00:26:53,136 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-26 00:26:53,136 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-26 00:26:53,137 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-26 00:26:53,137 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-26 00:26:53,138 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-26 00:26:53,138 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-26 00:26:53,139 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-26 00:26:53,139 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-26 00:26:53,139 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-26 00:26:53,139 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-26 00:26:53,140 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-26 00:26:53,141 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-26 00:26:53,141 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-26 00:26:53,142 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-26 00:26:53,142 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-26 00:26:53,142 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-26 00:26:53,142 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-11-26 00:26:53,143 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-11-26 00:26:53,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:26:53,143 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-26 00:26:53,143 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-26 00:26:53,143 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-26 00:26:53,143 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-26 00:26:53,144 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-26 00:26:53,144 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-26 00:26:53,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:26:53,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:26:53,145 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-26 00:26:53,146 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-26 00:26:53,328 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:26:53,330 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:26:54,396 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:26:55,156 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:26:55,157 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:26:55,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:26:55 BoogieIcfgContainer [2022-11-26 00:26:55,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:26:55,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:26:55,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:26:55,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:26:55,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:26:51" (1/3) ... [2022-11-26 00:26:55,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77d8d77e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:26:55, skipping insertion in model container [2022-11-26 00:26:55,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:26:52" (2/3) ... [2022-11-26 00:26:55,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77d8d77e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:26:55, skipping insertion in model container [2022-11-26 00:26:55,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:26:55" (3/3) ... [2022-11-26 00:26:55,176 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product03.cil.c [2022-11-26 00:26:55,197 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:26:55,198 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:26:55,276 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:26:55,284 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;@3583b2a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:26:55,285 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:26:55,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 347 states, 232 states have (on average 1.5775862068965518) internal successors, (366), 248 states have internal predecessors, (366), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-11-26 00:26:55,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-26 00:26:55,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:26:55,323 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:26:55,324 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:26:55,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:26:55,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1361539703, now seen corresponding path program 1 times [2022-11-26 00:26:55,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:26:55,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820509879] [2022-11-26 00:26:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:26:55,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:26:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:26:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:26:56,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:26:56,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820509879] [2022-11-26 00:26:56,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820509879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:26:56,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:26:56,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:26:56,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261432829] [2022-11-26 00:26:56,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:26:56,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:26:56,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:26:56,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:26:56,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:26:56,239 INFO L87 Difference]: Start difference. First operand has 347 states, 232 states have (on average 1.5775862068965518) internal successors, (366), 248 states have internal predecessors, (366), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-26 00:26:56,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:26:56,927 INFO L93 Difference]: Finished difference Result 1024 states and 1639 transitions. [2022-11-26 00:26:56,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:26:56,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 72 [2022-11-26 00:26:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:26:56,948 INFO L225 Difference]: With dead ends: 1024 [2022-11-26 00:26:56,948 INFO L226 Difference]: Without dead ends: 678 [2022-11-26 00:26:56,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:26:56,958 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 1166 mSDsluCounter, 2065 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 2707 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:26:56,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1170 Valid, 2707 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:26:56,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-11-26 00:26:57,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 664. [2022-11-26 00:26:57,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 448 states have (on average 1.5691964285714286) internal successors, (703), 476 states have internal predecessors, (703), 174 states have call successors, (174), 42 states have call predecessors, (174), 41 states have return successors, (178), 170 states have call predecessors, (178), 172 states have call successors, (178) [2022-11-26 00:26:57,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1055 transitions. [2022-11-26 00:26:57,074 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1055 transitions. Word has length 72 [2022-11-26 00:26:57,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:26:57,075 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 1055 transitions. [2022-11-26 00:26:57,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-26 00:26:57,076 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1055 transitions. [2022-11-26 00:26:57,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 00:26:57,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:26:57,080 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:26:57,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:26:57,081 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:26:57,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:26:57,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1870757883, now seen corresponding path program 1 times [2022-11-26 00:26:57,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:26:57,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32215887] [2022-11-26 00:26:57,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:26:57,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:26:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:26:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 00:26:57,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:26:57,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32215887] [2022-11-26 00:26:57,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32215887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:26:57,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:26:57,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:26:57,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063533920] [2022-11-26 00:26:57,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:26:57,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:26:57,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:26:57,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:26:57,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:26:57,448 INFO L87 Difference]: Start difference. First operand 664 states and 1055 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-26 00:26:58,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:26:58,124 INFO L93 Difference]: Finished difference Result 1009 states and 1605 transitions. [2022-11-26 00:26:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:26:58,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2022-11-26 00:26:58,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:26:58,131 INFO L225 Difference]: With dead ends: 1009 [2022-11-26 00:26:58,131 INFO L226 Difference]: Without dead ends: 676 [2022-11-26 00:26:58,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:26:58,135 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 515 mSDsluCounter, 1603 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 2247 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:26:58,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 2247 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:26:58,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-11-26 00:26:58,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 670. [2022-11-26 00:26:58,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 451 states have (on average 1.565410199556541) internal successors, (706), 481 states have internal predecessors, (706), 176 states have call successors, (176), 43 states have call predecessors, (176), 42 states have return successors, (183), 170 states have call predecessors, (183), 174 states have call successors, (183) [2022-11-26 00:26:58,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1065 transitions. [2022-11-26 00:26:58,188 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1065 transitions. Word has length 73 [2022-11-26 00:26:58,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:26:58,189 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 1065 transitions. [2022-11-26 00:26:58,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-26 00:26:58,189 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1065 transitions. [2022-11-26 00:26:58,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-26 00:26:58,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:26:58,220 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:26:58,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:26:58,221 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:26:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:26:58,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1188923024, now seen corresponding path program 1 times [2022-11-26 00:26:58,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:26:58,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874262496] [2022-11-26 00:26:58,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:26:58,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:26:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:26:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 00:26:58,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:26:58,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874262496] [2022-11-26 00:26:58,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874262496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:26:58,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:26:58,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:26:58,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038615911] [2022-11-26 00:26:58,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:26:58,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:26:58,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:26:58,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:26:58,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:26:58,661 INFO L87 Difference]: Start difference. First operand 670 states and 1065 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-26 00:26:59,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:26:59,430 INFO L93 Difference]: Finished difference Result 767 states and 1212 transitions. [2022-11-26 00:26:59,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:26:59,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 77 [2022-11-26 00:26:59,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:26:59,441 INFO L225 Difference]: With dead ends: 767 [2022-11-26 00:26:59,442 INFO L226 Difference]: Without dead ends: 765 [2022-11-26 00:26:59,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:26:59,449 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 630 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:26:59,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 1618 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:26:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-11-26 00:26:59,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 755. [2022-11-26 00:26:59,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 502 states have (on average 1.5318725099601593) internal successors, (769), 532 states have internal predecessors, (769), 198 states have call successors, (198), 56 states have call predecessors, (198), 54 states have return successors, (211), 190 states have call predecessors, (211), 195 states have call successors, (211) [2022-11-26 00:26:59,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1178 transitions. [2022-11-26 00:26:59,538 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1178 transitions. Word has length 77 [2022-11-26 00:26:59,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:26:59,539 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1178 transitions. [2022-11-26 00:26:59,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-26 00:26:59,540 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1178 transitions. [2022-11-26 00:26:59,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-26 00:26:59,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:26:59,544 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:26:59,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:26:59,545 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:26:59,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:26:59,545 INFO L85 PathProgramCache]: Analyzing trace with hash -2049057985, now seen corresponding path program 1 times [2022-11-26 00:26:59,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:26:59,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076678179] [2022-11-26 00:26:59,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:26:59,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:26:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:26:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-26 00:26:59,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:26:59,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076678179] [2022-11-26 00:26:59,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076678179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:26:59,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:26:59,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:26:59,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130349612] [2022-11-26 00:26:59,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:26:59,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:26:59,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:26:59,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:26:59,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:26:59,761 INFO L87 Difference]: Start difference. First operand 755 states and 1178 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-26 00:26:59,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:26:59,977 INFO L93 Difference]: Finished difference Result 1536 states and 2426 transitions. [2022-11-26 00:26:59,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:26:59,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 108 [2022-11-26 00:26:59,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:26:59,984 INFO L225 Difference]: With dead ends: 1536 [2022-11-26 00:26:59,984 INFO L226 Difference]: Without dead ends: 793 [2022-11-26 00:26:59,992 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 [2022-11-26 00:27:00,000 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 54 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:00,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1522 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:27:00,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-26 00:27:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 759. [2022-11-26 00:27:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 506 states have (on average 1.5276679841897234) internal successors, (773), 536 states have internal predecessors, (773), 198 states have call successors, (198), 56 states have call predecessors, (198), 54 states have return successors, (211), 190 states have call predecessors, (211), 195 states have call successors, (211) [2022-11-26 00:27:00,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1182 transitions. [2022-11-26 00:27:00,083 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1182 transitions. Word has length 108 [2022-11-26 00:27:00,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:00,085 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 1182 transitions. [2022-11-26 00:27:00,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-26 00:27:00,086 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1182 transitions. [2022-11-26 00:27:00,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-26 00:27:00,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:00,100 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:00,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:27:00,101 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:00,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:00,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1105147089, now seen corresponding path program 1 times [2022-11-26 00:27:00,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:00,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418006813] [2022-11-26 00:27:00,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:00,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-26 00:27:00,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:00,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418006813] [2022-11-26 00:27:00,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418006813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:27:00,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120923065] [2022-11-26 00:27:00,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:00,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:00,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:00,314 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:00,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:27:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:00,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:27:00,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 00:27:00,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:27:00,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120923065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:00,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:27:00,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 00:27:00,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856788716] [2022-11-26 00:27:00,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:00,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:27:00,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:00,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:27:00,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:27:00,732 INFO L87 Difference]: Start difference. First operand 759 states and 1182 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:27:01,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:01,109 INFO L93 Difference]: Finished difference Result 1584 states and 2514 transitions. [2022-11-26 00:27:01,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:27:01,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 111 [2022-11-26 00:27:01,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:01,117 INFO L225 Difference]: With dead ends: 1584 [2022-11-26 00:27:01,117 INFO L226 Difference]: Without dead ends: 837 [2022-11-26 00:27:01,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:27:01,124 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 213 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:01,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1296 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:27:01,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-11-26 00:27:01,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 837. [2022-11-26 00:27:01,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 582 states have (on average 1.5790378006872852) internal successors, (919), 612 states have internal predecessors, (919), 198 states have call successors, (198), 58 states have call predecessors, (198), 56 states have return successors, (211), 190 states have call predecessors, (211), 195 states have call successors, (211) [2022-11-26 00:27:01,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1328 transitions. [2022-11-26 00:27:01,189 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1328 transitions. Word has length 111 [2022-11-26 00:27:01,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:01,189 INFO L495 AbstractCegarLoop]: Abstraction has 837 states and 1328 transitions. [2022-11-26 00:27:01,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:27:01,190 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1328 transitions. [2022-11-26 00:27:01,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-26 00:27:01,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:01,193 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:01,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:01,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:01,402 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:01,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:01,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1487500342, now seen corresponding path program 1 times [2022-11-26 00:27:01,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:01,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325542957] [2022-11-26 00:27:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:01,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-26 00:27:01,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:01,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325542957] [2022-11-26 00:27:01,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325542957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:27:01,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989914878] [2022-11-26 00:27:01,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:01,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:01,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:01,590 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:01,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:27:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:01,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 1279 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:27:01,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:27:01,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:27:01,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989914878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:01,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:27:01,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 00:27:01,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785754723] [2022-11-26 00:27:01,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:01,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:27:01,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:01,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:27:01,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:27:01,952 INFO L87 Difference]: Start difference. First operand 837 states and 1328 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:27:02,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:02,336 INFO L93 Difference]: Finished difference Result 1740 states and 2804 transitions. [2022-11-26 00:27:02,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:27:02,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 116 [2022-11-26 00:27:02,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:02,356 INFO L225 Difference]: With dead ends: 1740 [2022-11-26 00:27:02,357 INFO L226 Difference]: Without dead ends: 915 [2022-11-26 00:27:02,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:27:02,362 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 211 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:02,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1296 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:27:02,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-11-26 00:27:02,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 915. [2022-11-26 00:27:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 658 states have (on average 1.6185410334346504) internal successors, (1065), 688 states have internal predecessors, (1065), 198 states have call successors, (198), 60 states have call predecessors, (198), 58 states have return successors, (211), 190 states have call predecessors, (211), 195 states have call successors, (211) [2022-11-26 00:27:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1474 transitions. [2022-11-26 00:27:02,439 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1474 transitions. Word has length 116 [2022-11-26 00:27:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:02,440 INFO L495 AbstractCegarLoop]: Abstraction has 915 states and 1474 transitions. [2022-11-26 00:27:02,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:27:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1474 transitions. [2022-11-26 00:27:02,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-26 00:27:02,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:02,444 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:02,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-26 00:27:02,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:27:02,651 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:02,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:02,652 INFO L85 PathProgramCache]: Analyzing trace with hash 722808998, now seen corresponding path program 1 times [2022-11-26 00:27:02,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:02,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97037993] [2022-11-26 00:27:02,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:02,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-26 00:27:02,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:02,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97037993] [2022-11-26 00:27:02,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97037993] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:27:02,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21733195] [2022-11-26 00:27:02,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:02,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:02,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:02,816 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:02,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:27:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:03,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:27:03,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:27:03,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:27:03,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21733195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:03,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:27:03,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 00:27:03,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049815281] [2022-11-26 00:27:03,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:03,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:27:03,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:03,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:27:03,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:27:03,176 INFO L87 Difference]: Start difference. First operand 915 states and 1474 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:27:03,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:03,492 INFO L93 Difference]: Finished difference Result 1896 states and 3094 transitions. [2022-11-26 00:27:03,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:27:03,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 120 [2022-11-26 00:27:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:03,536 INFO L225 Difference]: With dead ends: 1896 [2022-11-26 00:27:03,537 INFO L226 Difference]: Without dead ends: 993 [2022-11-26 00:27:03,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:27:03,543 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 209 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:03,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1296 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:27:03,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-11-26 00:27:03,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 993. [2022-11-26 00:27:03,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 734 states have (on average 1.6498637602179838) internal successors, (1211), 764 states have internal predecessors, (1211), 198 states have call successors, (198), 62 states have call predecessors, (198), 60 states have return successors, (211), 190 states have call predecessors, (211), 195 states have call successors, (211) [2022-11-26 00:27:03,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1620 transitions. [2022-11-26 00:27:03,616 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1620 transitions. Word has length 120 [2022-11-26 00:27:03,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:03,616 INFO L495 AbstractCegarLoop]: Abstraction has 993 states and 1620 transitions. [2022-11-26 00:27:03,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:27:03,617 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1620 transitions. [2022-11-26 00:27:03,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-26 00:27:03,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:03,622 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:03,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:03,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 00:27:03,831 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:03,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:03,832 INFO L85 PathProgramCache]: Analyzing trace with hash -456852239, now seen corresponding path program 1 times [2022-11-26 00:27:03,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:03,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395897905] [2022-11-26 00:27:03,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:03,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-26 00:27:04,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:04,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395897905] [2022-11-26 00:27:04,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395897905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:27:04,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326114576] [2022-11-26 00:27:04,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:04,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:04,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:04,018 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:04,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:27:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:04,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:27:04,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-26 00:27:04,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:27:04,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326114576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:04,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:27:04,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 00:27:04,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474790025] [2022-11-26 00:27:04,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:04,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:27:04,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:04,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:27:04,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:27:04,393 INFO L87 Difference]: Start difference. First operand 993 states and 1620 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:27:04,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:04,712 INFO L93 Difference]: Finished difference Result 2052 states and 3384 transitions. [2022-11-26 00:27:04,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:27:04,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 123 [2022-11-26 00:27:04,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:04,720 INFO L225 Difference]: With dead ends: 2052 [2022-11-26 00:27:04,720 INFO L226 Difference]: Without dead ends: 1071 [2022-11-26 00:27:04,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:27:04,726 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 207 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:04,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1296 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:27:04,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2022-11-26 00:27:04,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 1071. [2022-11-26 00:27:04,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 810 states have (on average 1.6753086419753087) internal successors, (1357), 840 states have internal predecessors, (1357), 198 states have call successors, (198), 64 states have call predecessors, (198), 62 states have return successors, (211), 190 states have call predecessors, (211), 195 states have call successors, (211) [2022-11-26 00:27:04,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1766 transitions. [2022-11-26 00:27:04,783 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1766 transitions. Word has length 123 [2022-11-26 00:27:04,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:04,783 INFO L495 AbstractCegarLoop]: Abstraction has 1071 states and 1766 transitions. [2022-11-26 00:27:04,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:27:04,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1766 transitions. [2022-11-26 00:27:04,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-26 00:27:04,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:04,788 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 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] [2022-11-26 00:27:04,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:04,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:04,996 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:04,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:04,997 INFO L85 PathProgramCache]: Analyzing trace with hash 868611071, now seen corresponding path program 1 times [2022-11-26 00:27:04,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:04,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008128541] [2022-11-26 00:27:04,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:04,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-26 00:27:05,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:05,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008128541] [2022-11-26 00:27:05,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008128541] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:27:05,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858950032] [2022-11-26 00:27:05,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:05,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:05,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:05,300 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:05,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:27:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:05,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-26 00:27:05,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-26 00:27:06,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:00,205 WARN L233 SmtUtils]: Spent 49.95s 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) [2022-11-26 00:28:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-26 00:28:02,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858950032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:02,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [226583088] [2022-11-26 00:28:02,929 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2022-11-26 00:28:02,930 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:02,933 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:28:02,939 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:28:02,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:28:05,878 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2022-11-26 00:28:09,422 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-11-26 00:28:10,180 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 564 for LOIs [2022-11-26 00:28:32,764 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 60 for LOIs [2022-11-26 00:28:32,770 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__base with input of size 433 for LOIs [2022-11-26 00:28:33,422 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 104 for LOIs [2022-11-26 00:28:33,670 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 60 for LOIs [2022-11-26 00:28:33,682 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 97 for LOIs [2022-11-26 00:28:33,916 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-11-26 00:28:34,048 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 78 for LOIs [2022-11-26 00:28:34,066 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:28:56,698 WARN L233 SmtUtils]: Spent 7.03s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:29:04,148 WARN L233 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:29:13,015 WARN L233 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 768 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:29:29,414 WARN L233 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 602 DAG size of output: 579 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:29:35,275 WARN L233 SmtUtils]: Spent 5.42s on a formula simplification. DAG size of input: 602 DAG size of output: 579 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:29:41,175 WARN L233 SmtUtils]: Spent 5.41s on a formula simplification. DAG size of input: 598 DAG size of output: 575 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:30:24,104 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27795#(and (<= 0 |timeShift_processWaitingOnFloor_#in~floorID#1|) (= |old(~floorButtons_2~0)| 0) (<= ~floorButtons_3~0 0) (= ~executiveFloor~0 4) (= |old(~persons_1~0)| 0) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= ~currentHeading~0 1) (= |old(~persons_5~0)| 0) (= |old(~doorState~0)| 1) (= |old(~persons_2~0)| 0) (= |timeShift_processWaitingOnFloor_~tmp___6~1#1| 0) (= ~persons_5~0 0) (= |old(~persons_4~0)| 0) (<= ~personOnFloor_5_1~0 1) (= |old(~floorButtons_0~0)| 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (<= ~floorButtons_0~0 0) (<= 0 ~floorButtons_1~0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 ~floorButtons_2~0) (<= |timeShift_resetFloorButton_#in~floorID#1| 0) (<= ~calls_0~0 0) (= ~head~0.offset 0) (<= 0 |timeShift_resetFloorButton_#in~floorID#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (= ~persons_4~0 0) (<= |timeShift_processWaitingOnFloor_#in~floorID#1| 0) (<= 0 ~floorButtons_3~0) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 0 |timeShift_~tmp___9~2#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (<= 0 |timeShift_processWaitingOnFloor_~floorID#1|) (= |timeShift_processWaitingOnFloor_~tmp___0~10#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 0) (<= 0 |timeShift_resetFloorButton_~floorID#1|) (= |timeShift_stopRequestedAtCurrentFloor_~tmp~21#1| 0) (<= ~floorButtons_2~0 0) (= ~persons_3~0 0) (= |old(~floorButtons_4~0)| 0) (= |old(~persons_0~0)| 0) (<= 0 ~floorButtons_0~0) (= ~doorState~0 1) (= |timeShift_processWaitingOnFloor_~tmp___10~0#1| 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= 1 ~currentHeading~0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (<= 0 ~calls_0~0) (= |old(~persons_3~0)| 0) (= ~persons_1~0 0) (= ~persons_0~0 0) (= |old(~floorButtons_3~0)| 0) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= 1 ~personOnFloor_5_1~0) (= |#NULL.offset| 0) (<= ~floorButtons_4~0 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1| 1) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| |timeShift_areDoorsOpen_#res#1|) (<= |timeShift_~tmp___9~2#1| 1) (= |old(~currentHeading~0)| 1) (= |timeShift_processWaitingOnFloor_~tmp___8~1#1| 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_resetFloorButton_~floorID#1| 0) (= |old(~personOnFloor_5_1~0)| 1) (= 1 |old(~calls_1~0)|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 ~floorButtons_4~0) (<= 0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (= |old(~floorButtons_1~0)| 0) (= |old(~currentFloorID~0)| 0) (<= 0 |#StackHeapBarrier|) (<= ~floorButtons_1~0 0) (<= |timeShift_processWaitingOnFloor_~floorID#1| 0) (= |timeShift_processWaitingOnFloor_~tmp___2~4#1| 0) (= ~cleanupTimeShifts~0 12) (= |timeShift_processWaitingOnFloor_~tmp___4~1#1| 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2022-11-26 00:30:24,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:30:24,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:30:24,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 16] total 32 [2022-11-26 00:30:24,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532109983] [2022-11-26 00:30:24,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:30:24,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-26 00:30:24,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:24,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-26 00:30:24,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=6988, Unknown=0, NotChecked=0, Total=7832 [2022-11-26 00:30:24,110 INFO L87 Difference]: Start difference. First operand 1071 states and 1766 transitions. Second operand has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) [2022-11-26 00:30:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:40,242 INFO L93 Difference]: Finished difference Result 3428 states and 5714 transitions. [2022-11-26 00:30:40,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-26 00:30:40,243 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) Word has length 125 [2022-11-26 00:30:40,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:40,259 INFO L225 Difference]: With dead ends: 3428 [2022-11-26 00:30:40,259 INFO L226 Difference]: Without dead ends: 1886 [2022-11-26 00:30:40,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 290 SyntacticMatches, 18 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7605 ImplicationChecksByTransitivity, 114.0s TimeCoverageRelationStatistics Valid=1898, Invalid=17842, Unknown=0, NotChecked=0, Total=19740 [2022-11-26 00:30:40,278 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 4974 mSDsluCounter, 3393 mSDsCounter, 0 mSdLazyCounter, 14170 mSolverCounterSat, 2873 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5017 SdHoareTripleChecker+Valid, 3712 SdHoareTripleChecker+Invalid, 17043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2873 IncrementalHoareTripleChecker+Valid, 14170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:30:40,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5017 Valid, 3712 Invalid, 17043 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2873 Valid, 14170 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2022-11-26 00:30:40,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2022-11-26 00:30:40,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1743. [2022-11-26 00:30:40,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1254 states have (on average 1.5773524720893142) internal successors, (1978), 1318 states have internal predecessors, (1978), 364 states have call successors, (364), 128 states have call predecessors, (364), 124 states have return successors, (408), 344 states have call predecessors, (408), 361 states have call successors, (408) [2022-11-26 00:30:40,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 2750 transitions. [2022-11-26 00:30:40,467 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 2750 transitions. Word has length 125 [2022-11-26 00:30:40,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:40,468 INFO L495 AbstractCegarLoop]: Abstraction has 1743 states and 2750 transitions. [2022-11-26 00:30:40,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) [2022-11-26 00:30:40,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 2750 transitions. [2022-11-26 00:30:40,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-26 00:30:40,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:40,475 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:40,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:40,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:40,684 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:30:40,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:40,684 INFO L85 PathProgramCache]: Analyzing trace with hash 58342943, now seen corresponding path program 1 times [2022-11-26 00:30:40,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:30:40,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117183646] [2022-11-26 00:30:40,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:40,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:30:40,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-26 00:30:41,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:30:41,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117183646] [2022-11-26 00:30:41,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117183646] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:30:41,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474026908] [2022-11-26 00:30:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:41,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:41,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:30:41,059 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:30:41,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:30:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:41,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 1302 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:30:41,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-26 00:30:41,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:30:41,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474026908] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:30:41,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:30:41,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-26 00:30:41,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845772792] [2022-11-26 00:30:41,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:30:41,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:30:41,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:41,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:30:41,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:30:41,543 INFO L87 Difference]: Start difference. First operand 1743 states and 2750 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-26 00:30:42,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:42,533 INFO L93 Difference]: Finished difference Result 3297 states and 5201 transitions. [2022-11-26 00:30:42,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:30:42,534 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 130 [2022-11-26 00:30:42,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:42,545 INFO L225 Difference]: With dead ends: 3297 [2022-11-26 00:30:42,545 INFO L226 Difference]: Without dead ends: 1567 [2022-11-26 00:30:42,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:30:42,556 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 333 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 2225 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:30:42,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 2225 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:30:42,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2022-11-26 00:30:42,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 1543. [2022-11-26 00:30:42,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 1129 states have (on average 1.5890168290522586) internal successors, (1794), 1177 states have internal predecessors, (1794), 303 states have call successors, (303), 113 states have call predecessors, (303), 110 states have return successors, (334), 288 states have call predecessors, (334), 300 states have call successors, (334) [2022-11-26 00:30:42,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2431 transitions. [2022-11-26 00:30:42,696 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2431 transitions. Word has length 130 [2022-11-26 00:30:42,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:42,696 INFO L495 AbstractCegarLoop]: Abstraction has 1543 states and 2431 transitions. [2022-11-26 00:30:42,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-26 00:30:42,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2431 transitions. [2022-11-26 00:30:42,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-11-26 00:30:42,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:42,707 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-26 00:30:42,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:42,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:30:42,915 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:30:42,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:42,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1651319062, now seen corresponding path program 1 times [2022-11-26 00:30:42,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:30:42,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125074888] [2022-11-26 00:30:42,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:42,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:30:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-11-26 00:30:43,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:30:43,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125074888] [2022-11-26 00:30:43,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125074888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:30:43,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:30:43,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:30:43,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686180528] [2022-11-26 00:30:43,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:30:43,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:30:43,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:43,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:30:43,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:30:43,351 INFO L87 Difference]: Start difference. First operand 1543 states and 2431 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-26 00:30:43,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:43,631 INFO L93 Difference]: Finished difference Result 2773 states and 4445 transitions. [2022-11-26 00:30:43,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:30:43,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 241 [2022-11-26 00:30:43,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:43,642 INFO L225 Difference]: With dead ends: 2773 [2022-11-26 00:30:43,642 INFO L226 Difference]: Without dead ends: 1595 [2022-11-26 00:30:43,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:30:43,650 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 16 mSDsluCounter, 2043 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2566 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:30:43,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 2566 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:30:43,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2022-11-26 00:30:43,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1569. [2022-11-26 00:30:43,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1149 states have (on average 1.577023498694517) internal successors, (1812), 1199 states have internal predecessors, (1812), 303 states have call successors, (303), 113 states have call predecessors, (303), 116 states have return successors, (344), 292 states have call predecessors, (344), 300 states have call successors, (344) [2022-11-26 00:30:43,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 2459 transitions. [2022-11-26 00:30:43,778 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 2459 transitions. Word has length 241 [2022-11-26 00:30:43,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:43,778 INFO L495 AbstractCegarLoop]: Abstraction has 1569 states and 2459 transitions. [2022-11-26 00:30:43,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-26 00:30:43,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 2459 transitions. [2022-11-26 00:30:43,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-26 00:30:43,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:43,791 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 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] [2022-11-26 00:30:43,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:30:43,791 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:30:43,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:43,792 INFO L85 PathProgramCache]: Analyzing trace with hash -371027254, now seen corresponding path program 1 times [2022-11-26 00:30:43,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:30:43,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070254181] [2022-11-26 00:30:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:43,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:30:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-26 00:30:44,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:30:44,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070254181] [2022-11-26 00:30:44,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070254181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:30:44,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203561528] [2022-11-26 00:30:44,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:44,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:44,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:30:44,592 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:30:44,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:30:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:44,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 1679 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:30:44,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 63 proven. 10 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-26 00:30:45,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:30:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-26 00:30:45,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203561528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:30:45,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [778873795] [2022-11-26 00:30:45,717 INFO L159 IcfgInterpreter]: Started Sifa with 113 locations of interest [2022-11-26 00:30:45,717 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:30:45,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:30:45,718 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:30:45,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:30:51,244 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 647 for LOIs [2022-11-26 00:30:59,861 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 42 for LOIs [2022-11-26 00:31:00,198 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 18 for LOIs [2022-11-26 00:31:00,270 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 73 for LOIs [2022-11-26 00:31:00,353 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 54 for LOIs [2022-11-26 00:31:00,364 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 18 for LOIs [2022-11-26 00:31:00,366 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2022-11-26 00:31:03,816 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-11-26 00:31:04,442 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__base with input of size 25 for LOIs [2022-11-26 00:31:04,502 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 50 for LOIs [2022-11-26 00:31:04,515 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 31 for LOIs [2022-11-26 00:31:04,555 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 29 for LOIs [2022-11-26 00:31:04,557 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-11-26 00:31:04,696 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:31:26,696 WARN L233 SmtUtils]: Spent 7.05s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:31:34,119 WARN L233 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:31:42,893 WARN L233 SmtUtils]: Spent 5.29s on a formula simplification. DAG size of input: 768 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:31:55,604 WARN L233 SmtUtils]: Spent 6.35s on a formula simplification. DAG size of input: 647 DAG size of output: 556 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:32:21,533 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48688#(and (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~9#1| 2147483648)) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1|) (= ~executiveFloor~0 4) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= 0 (+ |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= ~head~0.offset 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~9#1| 2147483647) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 2147483647) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~21#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |#NULL.offset| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1| 1) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| |timeShift_areDoorsOpen_#res#1|) (<= |timeShift_~tmp___9~2#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~21#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-11-26 00:32:21,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:32:21,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:32:21,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-11-26 00:32:21,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963995408] [2022-11-26 00:32:21,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:32:21,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:32:21,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:32:21,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:32:21,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=10687, Unknown=0, NotChecked=0, Total=11772 [2022-11-26 00:32:21,540 INFO L87 Difference]: Start difference. First operand 1569 states and 2459 transitions. Second operand has 26 states, 20 states have (on average 10.15) internal successors, (203), 22 states have internal predecessors, (203), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) [2022-11-26 00:32:39,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:32:39,236 INFO L93 Difference]: Finished difference Result 5780 states and 9275 transitions. [2022-11-26 00:32:39,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-26 00:32:39,237 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 10.15) internal successors, (203), 22 states have internal predecessors, (203), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) Word has length 188 [2022-11-26 00:32:39,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:32:39,266 INFO L225 Difference]: With dead ends: 5780 [2022-11-26 00:32:39,266 INFO L226 Difference]: Without dead ends: 4187 [2022-11-26 00:32:39,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 496 SyntacticMatches, 11 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11524 ImplicationChecksByTransitivity, 79.0s TimeCoverageRelationStatistics Valid=2344, Invalid=26048, Unknown=0, NotChecked=0, Total=28392 [2022-11-26 00:32:39,289 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 5775 mSDsluCounter, 5707 mSDsCounter, 0 mSdLazyCounter, 20813 mSolverCounterSat, 4513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5797 SdHoareTripleChecker+Valid, 6278 SdHoareTripleChecker+Invalid, 25326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4513 IncrementalHoareTripleChecker+Valid, 20813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:32:39,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5797 Valid, 6278 Invalid, 25326 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4513 Valid, 20813 Invalid, 0 Unknown, 0 Unchecked, 14.8s Time] [2022-11-26 00:32:39,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4187 states. [2022-11-26 00:32:39,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4187 to 3841. [2022-11-26 00:32:39,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3841 states, 2834 states have (on average 1.5215243472124207) internal successors, (4312), 2929 states have internal predecessors, (4312), 692 states have call successors, (692), 297 states have call predecessors, (692), 314 states have return successors, (836), 674 states have call predecessors, (836), 684 states have call successors, (836) [2022-11-26 00:32:39,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3841 states to 3841 states and 5840 transitions. [2022-11-26 00:32:39,654 INFO L78 Accepts]: Start accepts. Automaton has 3841 states and 5840 transitions. Word has length 188 [2022-11-26 00:32:39,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:32:39,656 INFO L495 AbstractCegarLoop]: Abstraction has 3841 states and 5840 transitions. [2022-11-26 00:32:39,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 10.15) internal successors, (203), 22 states have internal predecessors, (203), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) [2022-11-26 00:32:39,658 INFO L276 IsEmpty]: Start isEmpty. Operand 3841 states and 5840 transitions. [2022-11-26 00:32:39,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-11-26 00:32:39,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:32:39,685 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:32:39,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-26 00:32:39,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:32:39,893 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:32:39,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:32:39,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1047028533, now seen corresponding path program 1 times [2022-11-26 00:32:39,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:32:39,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759734950] [2022-11-26 00:32:39,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:32:39,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:32:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:32:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2022-11-26 00:32:40,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:32:40,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759734950] [2022-11-26 00:32:40,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759734950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:32:40,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:32:40,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:32:40,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794667103] [2022-11-26 00:32:40,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:32:40,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:32:40,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:32:40,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:32:40,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:32:40,117 INFO L87 Difference]: Start difference. First operand 3841 states and 5840 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-26 00:32:40,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:32:40,597 INFO L93 Difference]: Finished difference Result 6621 states and 10097 transitions. [2022-11-26 00:32:40,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:32:40,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 255 [2022-11-26 00:32:40,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:32:40,625 INFO L225 Difference]: With dead ends: 6621 [2022-11-26 00:32:40,625 INFO L226 Difference]: Without dead ends: 3943 [2022-11-26 00:32:40,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:32:40,642 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 344 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:32:40,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 995 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:32:40,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2022-11-26 00:32:41,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 3921. [2022-11-26 00:32:41,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3921 states, 2886 states have (on average 1.496881496881497) internal successors, (4320), 2983 states have internal predecessors, (4320), 706 states have call successors, (706), 309 states have call predecessors, (706), 328 states have return successors, (854), 688 states have call predecessors, (854), 698 states have call successors, (854) [2022-11-26 00:32:41,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3921 states to 3921 states and 5880 transitions. [2022-11-26 00:32:41,044 INFO L78 Accepts]: Start accepts. Automaton has 3921 states and 5880 transitions. Word has length 255 [2022-11-26 00:32:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:32:41,045 INFO L495 AbstractCegarLoop]: Abstraction has 3921 states and 5880 transitions. [2022-11-26 00:32:41,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-26 00:32:41,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3921 states and 5880 transitions. [2022-11-26 00:32:41,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-11-26 00:32:41,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:32:41,072 INFO L195 NwaCegarLoop]: trace histogram [16, 12, 12, 12, 12, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:32:41,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:32:41,072 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:32:41,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:32:41,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1990938391, now seen corresponding path program 1 times [2022-11-26 00:32:41,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:32:41,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610496005] [2022-11-26 00:32:41,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:32:41,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:32:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:32:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 34 proven. 52 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-11-26 00:32:42,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:32:42,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610496005] [2022-11-26 00:32:42,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610496005] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:32:42,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556095694] [2022-11-26 00:32:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:32:42,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:32:42,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:32:42,079 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:32:42,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:32:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:32:42,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 3057 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:32:42,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:32:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-26 00:32:42,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:32:42,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556095694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:32:42,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:32:42,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-26 00:32:42,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239864937] [2022-11-26 00:32:42,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:32:42,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:32:42,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:32:42,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:32:42,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:32:42,711 INFO L87 Difference]: Start difference. First operand 3921 states and 5880 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2022-11-26 00:32:43,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:32:43,182 INFO L93 Difference]: Finished difference Result 6360 states and 9603 transitions. [2022-11-26 00:32:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:32:43,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 356 [2022-11-26 00:32:43,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:32:43,217 INFO L225 Difference]: With dead ends: 6360 [2022-11-26 00:32:43,217 INFO L226 Difference]: Without dead ends: 3915 [2022-11-26 00:32:43,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:32:43,229 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 394 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:32:43,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 979 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:32:43,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3915 states. [2022-11-26 00:32:43,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3915 to 3893. [2022-11-26 00:32:43,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3893 states, 2862 states have (on average 1.4975541579315164) internal successors, (4286), 2959 states have internal predecessors, (4286), 702 states have call successors, (702), 309 states have call predecessors, (702), 328 states have return successors, (847), 684 states have call predecessors, (847), 694 states have call successors, (847) [2022-11-26 00:32:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 5835 transitions. [2022-11-26 00:32:43,642 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 5835 transitions. Word has length 356 [2022-11-26 00:32:43,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:32:43,643 INFO L495 AbstractCegarLoop]: Abstraction has 3893 states and 5835 transitions. [2022-11-26 00:32:43,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2022-11-26 00:32:43,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 5835 transitions. [2022-11-26 00:32:43,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-11-26 00:32:43,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:32:43,669 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:32:43,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:32:43,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 00:32:43,880 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:32:43,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:32:43,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1340875790, now seen corresponding path program 1 times [2022-11-26 00:32:43,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:32:43,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005962517] [2022-11-26 00:32:43,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:32:43,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:32:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:32:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 23 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-11-26 00:32:44,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:32:44,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005962517] [2022-11-26 00:32:44,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005962517] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:32:44,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87347854] [2022-11-26 00:32:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:32:44,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:32:44,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:32:44,334 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:32:44,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:32:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:32:44,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 2046 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:32:44,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:32:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 97 proven. 18 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-11-26 00:32:45,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:32:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 23 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-11-26 00:32:45,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87347854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:32:45,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2073113957] [2022-11-26 00:32:45,592 INFO L159 IcfgInterpreter]: Started Sifa with 113 locations of interest [2022-11-26 00:32:45,593 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:32:45,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:32:45,594 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:32:45,596 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:32:51,330 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 647 for LOIs [2022-11-26 00:32:59,476 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 42 for LOIs [2022-11-26 00:32:59,759 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 18 for LOIs [2022-11-26 00:32:59,780 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 73 for LOIs [2022-11-26 00:32:59,866 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 54 for LOIs [2022-11-26 00:32:59,880 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 18 for LOIs [2022-11-26 00:32:59,882 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2022-11-26 00:33:03,525 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-11-26 00:33:04,095 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__base with input of size 25 for LOIs [2022-11-26 00:33:04,154 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 50 for LOIs [2022-11-26 00:33:04,169 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 31 for LOIs [2022-11-26 00:33:04,221 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 29 for LOIs [2022-11-26 00:33:04,223 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-11-26 00:33:04,361 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:33:26,337 WARN L233 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:33:33,752 WARN L233 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:33:42,469 WARN L233 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 768 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:33:55,016 WARN L233 SmtUtils]: Spent 6.29s on a formula simplification. DAG size of input: 647 DAG size of output: 556 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:34:26,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '93168#(and (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~9#1| 2147483648)) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1|) (= ~executiveFloor~0 4) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= 0 (+ |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= ~head~0.offset 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~9#1| 2147483647) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 2147483647) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~21#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |#NULL.offset| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1| 1) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| |timeShift_areDoorsOpen_#res#1|) (<= |timeShift_~tmp___9~2#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~21#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-11-26 00:34:26,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:34:26,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:34:26,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-26 00:34:26,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706967326] [2022-11-26 00:34:26,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:34:26,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:34:26,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:26,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:34:26,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=10376, Unknown=0, NotChecked=0, Total=11556 [2022-11-26 00:34:26,701 INFO L87 Difference]: Start difference. First operand 3893 states and 5835 transitions. Second operand has 25 states, 19 states have (on average 10.0) internal successors, (190), 22 states have internal predecessors, (190), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) [2022-11-26 00:34:33,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:33,512 INFO L93 Difference]: Finished difference Result 7121 states and 10643 transitions. [2022-11-26 00:34:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-26 00:34:33,512 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 10.0) internal successors, (190), 22 states have internal predecessors, (190), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) Word has length 246 [2022-11-26 00:34:33,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:33,543 INFO L225 Difference]: With dead ends: 7121 [2022-11-26 00:34:33,543 INFO L226 Difference]: Without dead ends: 4867 [2022-11-26 00:34:33,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 637 SyntacticMatches, 18 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6821 ImplicationChecksByTransitivity, 83.8s TimeCoverageRelationStatistics Valid=1680, Invalid=14832, Unknown=0, NotChecked=0, Total=16512 [2022-11-26 00:34:33,561 INFO L413 NwaCegarLoop]: 1002 mSDtfsCounter, 1927 mSDsluCounter, 8597 mSDsCounter, 0 mSdLazyCounter, 7209 mSolverCounterSat, 1081 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1947 SdHoareTripleChecker+Valid, 9599 SdHoareTripleChecker+Invalid, 8290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1081 IncrementalHoareTripleChecker+Valid, 7209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:33,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1947 Valid, 9599 Invalid, 8290 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1081 Valid, 7209 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-26 00:34:33,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4867 states. [2022-11-26 00:34:34,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4867 to 4743. [2022-11-26 00:34:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4743 states, 3463 states have (on average 1.446722494946578) internal successors, (5010), 3573 states have internal predecessors, (5010), 851 states have call successors, (851), 399 states have call predecessors, (851), 428 states have return successors, (1079), 830 states have call predecessors, (1079), 841 states have call successors, (1079) [2022-11-26 00:34:34,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 6940 transitions. [2022-11-26 00:34:34,098 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 6940 transitions. Word has length 246 [2022-11-26 00:34:34,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:34,098 INFO L495 AbstractCegarLoop]: Abstraction has 4743 states and 6940 transitions. [2022-11-26 00:34:34,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 10.0) internal successors, (190), 22 states have internal predecessors, (190), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) [2022-11-26 00:34:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 6940 transitions. [2022-11-26 00:34:34,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-11-26 00:34:34,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:34,145 INFO L195 NwaCegarLoop]: trace histogram [15, 12, 12, 12, 12, 6, 6, 6, 6, 5, 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:34,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:34,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:34:34,354 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:34,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:34,354 INFO L85 PathProgramCache]: Analyzing trace with hash -756256838, now seen corresponding path program 1 times [2022-11-26 00:34:34,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:34,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578055297] [2022-11-26 00:34:34,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:34,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 37 proven. 50 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2022-11-26 00:34:35,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:35,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578055297] [2022-11-26 00:34:35,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578055297] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:34:35,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910840533] [2022-11-26 00:34:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:35,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:35,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:35,301 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:35,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:34:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:35,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 3062 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:34:35,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 291 proven. 0 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2022-11-26 00:34:36,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:34:36,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910840533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:34:36,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:34:36,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-11-26 00:34:36,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573969702] [2022-11-26 00:34:36,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:34:36,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:34:36,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:36,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:34:36,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:34:36,049 INFO L87 Difference]: Start difference. First operand 4743 states and 6940 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 4 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (41), 4 states have call predecessors, (41), 4 states have call successors, (41) [2022-11-26 00:34:36,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:36,719 INFO L93 Difference]: Finished difference Result 10297 states and 15336 transitions. [2022-11-26 00:34:36,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:34:36,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 4 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (41), 4 states have call predecessors, (41), 4 states have call successors, (41) Word has length 357 [2022-11-26 00:34:36,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:36,749 INFO L225 Difference]: With dead ends: 10297 [2022-11-26 00:34:36,750 INFO L226 Difference]: Without dead ends: 4811 [2022-11-26 00:34:36,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:34:36,778 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 505 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:36,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 1706 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:34:36,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4811 states. [2022-11-26 00:34:37,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4811 to 4749. [2022-11-26 00:34:37,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4749 states, 3466 states have (on average 1.4088286208886325) internal successors, (4883), 3579 states have internal predecessors, (4883), 851 states have call successors, (851), 399 states have call predecessors, (851), 431 states have return successors, (1085), 830 states have call predecessors, (1085), 841 states have call successors, (1085) [2022-11-26 00:34:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4749 states to 4749 states and 6819 transitions. [2022-11-26 00:34:37,331 INFO L78 Accepts]: Start accepts. Automaton has 4749 states and 6819 transitions. Word has length 357 [2022-11-26 00:34:37,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:37,333 INFO L495 AbstractCegarLoop]: Abstraction has 4749 states and 6819 transitions. [2022-11-26 00:34:37,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 4 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (41), 4 states have call predecessors, (41), 4 states have call successors, (41) [2022-11-26 00:34:37,333 INFO L276 IsEmpty]: Start isEmpty. Operand 4749 states and 6819 transitions. [2022-11-26 00:34:37,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-11-26 00:34:37,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:37,370 INFO L195 NwaCegarLoop]: trace histogram [16, 12, 12, 12, 12, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:37,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:37,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 00:34:37,592 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:37,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:37,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1845482625, now seen corresponding path program 1 times [2022-11-26 00:34:37,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:37,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39173456] [2022-11-26 00:34:37,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:37,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 34 proven. 52 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-11-26 00:34:38,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:38,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39173456] [2022-11-26 00:34:38,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39173456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:34:38,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943083256] [2022-11-26 00:34:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:38,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:38,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:38,635 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:38,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:34:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:39,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 3067 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:34:39,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 125 proven. 46 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2022-11-26 00:34:39,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 32 proven. 27 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2022-11-26 00:34:40,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943083256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:40,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [163565383] [2022-11-26 00:34:40,389 INFO L159 IcfgInterpreter]: Started Sifa with 149 locations of interest [2022-11-26 00:34:40,390 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:34:40,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:34:40,390 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:34:40,391 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:34:47,526 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 550 for LOIs [2022-11-26 00:34:47,973 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 18 for LOIs [2022-11-26 00:34:52,316 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 23 for LOIs [2022-11-26 00:34:52,562 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 18 for LOIs [2022-11-26 00:34:52,581 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 37 for LOIs [2022-11-26 00:34:52,652 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 51 for LOIs [2022-11-26 00:34:52,663 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 18 for LOIs [2022-11-26 00:34:52,665 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2022-11-26 00:34:55,953 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__base with input of size 40 for LOIs [2022-11-26 00:34:56,044 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 18 for LOIs [2022-11-26 00:34:56,057 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 25 for LOIs [2022-11-26 00:34:56,101 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 49 for LOIs [2022-11-26 00:34:56,109 INFO L197 IcfgInterpreter]: Interpreting procedure getReverseHeading with input of size 29 for LOIs [2022-11-26 00:34:56,111 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 506 for LOIs [2022-11-26 00:34:58,186 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 770 for LOIs [2022-11-26 00:35:02,735 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 623 for LOIs [2022-11-26 00:35:03,148 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:35:20,639 WARN L233 SmtUtils]: Spent 9.32s on a formula simplification. DAG size of input: 623 DAG size of output: 504 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:35:30,492 WARN L233 SmtUtils]: Spent 9.46s on a formula simplification. DAG size of input: 663 DAG size of output: 518 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:35:37,889 WARN L233 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:35:45,282 WARN L233 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:36:02,168 WARN L233 SmtUtils]: Spent 16.41s on a formula simplification. DAG size of input: 770 DAG size of output: 638 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:36:09,968 WARN L233 SmtUtils]: Spent 7.28s on a formula simplification that was a NOOP. DAG size: 773 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:37:14,304 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '134011#(and (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1|) (= ~executiveFloor~0 4) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= 0 (+ |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= ~head~0.offset 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 2147483647) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~21#1| 2147483647) (<= 0 ~head~0.base) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |#NULL.offset| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1| 1) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| |timeShift_areDoorsOpen_#res#1|) (<= |timeShift_~tmp___9~2#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~21#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-11-26 00:37:14,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:37:14,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:37:14,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2022-11-26 00:37:14,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308087442] [2022-11-26 00:37:14,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:37:14,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:37:14,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:37:14,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:37:14,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1232, Invalid=17400, Unknown=0, NotChecked=0, Total=18632 [2022-11-26 00:37:14,311 INFO L87 Difference]: Start difference. First operand 4749 states and 6819 transitions. Second operand has 23 states, 18 states have (on average 14.833333333333334) internal successors, (267), 20 states have internal predecessors, (267), 14 states have call successors, (96), 7 states have call predecessors, (96), 10 states have return successors, (90), 14 states have call predecessors, (90), 14 states have call successors, (90) [2022-11-26 00:37:26,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:37:26,453 INFO L93 Difference]: Finished difference Result 10477 states and 15247 transitions. [2022-11-26 00:37:26,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-26 00:37:26,454 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 14.833333333333334) internal successors, (267), 20 states have internal predecessors, (267), 14 states have call successors, (96), 7 states have call predecessors, (96), 10 states have return successors, (90), 14 states have call predecessors, (90), 14 states have call successors, (90) Word has length 361 [2022-11-26 00:37:26,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:37:26,484 INFO L225 Difference]: With dead ends: 10477 [2022-11-26 00:37:26,485 INFO L226 Difference]: Without dead ends: 6063 [2022-11-26 00:37:26,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1160 GetRequests, 967 SyntacticMatches, 16 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12482 ImplicationChecksByTransitivity, 133.4s TimeCoverageRelationStatistics Valid=1925, Invalid=29937, Unknown=0, NotChecked=0, Total=31862 [2022-11-26 00:37:26,507 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 4181 mSDsluCounter, 4073 mSDsCounter, 0 mSdLazyCounter, 12695 mSolverCounterSat, 3444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4188 SdHoareTripleChecker+Valid, 4682 SdHoareTripleChecker+Invalid, 16139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3444 IncrementalHoareTripleChecker+Valid, 12695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:37:26,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4188 Valid, 4682 Invalid, 16139 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3444 Valid, 12695 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-11-26 00:37:26,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2022-11-26 00:37:27,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 5759. [2022-11-26 00:37:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5759 states, 4196 states have (on average 1.3951382268827455) internal successors, (5854), 4333 states have internal predecessors, (5854), 1027 states have call successors, (1027), 492 states have call predecessors, (1027), 535 states have return successors, (1382), 1005 states have call predecessors, (1382), 1015 states have call successors, (1382) [2022-11-26 00:37:27,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5759 states to 5759 states and 8263 transitions. [2022-11-26 00:37:27,088 INFO L78 Accepts]: Start accepts. Automaton has 5759 states and 8263 transitions. Word has length 361 [2022-11-26 00:37:27,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:37:27,089 INFO L495 AbstractCegarLoop]: Abstraction has 5759 states and 8263 transitions. [2022-11-26 00:37:27,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 14.833333333333334) internal successors, (267), 20 states have internal predecessors, (267), 14 states have call successors, (96), 7 states have call predecessors, (96), 10 states have return successors, (90), 14 states have call predecessors, (90), 14 states have call successors, (90) [2022-11-26 00:37:27,090 INFO L276 IsEmpty]: Start isEmpty. Operand 5759 states and 8263 transitions. [2022-11-26 00:37:27,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-11-26 00:37:27,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:27,123 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 12, 10, 10, 10, 10, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-11-26 00:37:27,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-26 00:37:27,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:37:27,334 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:37:27,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:27,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1990902620, now seen corresponding path program 1 times [2022-11-26 00:37:27,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:37:27,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015141104] [2022-11-26 00:37:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:27,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:37:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 79 proven. 30 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2022-11-26 00:37:27,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:37:27,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015141104] [2022-11-26 00:37:27,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015141104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:37:27,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176937257] [2022-11-26 00:37:27,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:27,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:37:27,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:37:27,618 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:37:27,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:37:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:28,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 3116 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:37:28,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:37:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-11-26 00:37:28,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:37:28,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176937257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:37:28,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:37:28,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 00:37:28,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196561256] [2022-11-26 00:37:28,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:37:28,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:37:28,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:37:28,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:37:28,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:37:28,268 INFO L87 Difference]: Start difference. First operand 5759 states and 8263 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2022-11-26 00:37:28,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:37:28,877 INFO L93 Difference]: Finished difference Result 11627 states and 16743 transitions. [2022-11-26 00:37:28,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:37:28,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 390 [2022-11-26 00:37:28,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:37:28,911 INFO L225 Difference]: With dead ends: 11627 [2022-11-26 00:37:28,911 INFO L226 Difference]: Without dead ends: 5929 [2022-11-26 00:37:28,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:37:28,936 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 205 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:37:28,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1266 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:37:28,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5929 states. [2022-11-26 00:37:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5929 to 5929. [2022-11-26 00:37:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5929 states, 4360 states have (on average 1.4121559633027523) internal successors, (6157), 4497 states have internal predecessors, (6157), 1027 states have call successors, (1027), 498 states have call predecessors, (1027), 541 states have return successors, (1382), 1005 states have call predecessors, (1382), 1015 states have call successors, (1382) [2022-11-26 00:37:29,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5929 states to 5929 states and 8566 transitions. [2022-11-26 00:37:29,612 INFO L78 Accepts]: Start accepts. Automaton has 5929 states and 8566 transitions. Word has length 390 [2022-11-26 00:37:29,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:37:29,613 INFO L495 AbstractCegarLoop]: Abstraction has 5929 states and 8566 transitions. [2022-11-26 00:37:29,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2022-11-26 00:37:29,613 INFO L276 IsEmpty]: Start isEmpty. Operand 5929 states and 8566 transitions. [2022-11-26 00:37:29,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-11-26 00:37:29,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:29,645 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:37:29,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:37:29,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 00:37:29,868 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:37:29,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:29,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1245439730, now seen corresponding path program 1 times [2022-11-26 00:37:29,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:37:29,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526443695] [2022-11-26 00:37:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:29,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:37:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-11-26 00:37:30,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:37:30,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526443695] [2022-11-26 00:37:30,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526443695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:37:30,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753704799] [2022-11-26 00:37:30,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:30,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:37:30,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:37:30,290 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:37:30,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:37:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:37:30,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 2048 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:37:30,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:37:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 106 proven. 18 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-11-26 00:37:30,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:37:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-11-26 00:37:31,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753704799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:37:31,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2016566662] [2022-11-26 00:37:31,351 INFO L159 IcfgInterpreter]: Started Sifa with 112 locations of interest [2022-11-26 00:37:31,352 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:37:31,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:37:31,352 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:37:31,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:37:36,925 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 647 for LOIs [2022-11-26 00:37:47,027 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 35 for LOIs [2022-11-26 00:37:47,101 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 46 for LOIs [2022-11-26 00:37:47,177 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 83 for LOIs [2022-11-26 00:37:47,536 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 59 for LOIs [2022-11-26 00:37:47,562 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 46 for LOIs [2022-11-26 00:37:47,567 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2022-11-26 00:37:50,960 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-11-26 00:37:51,585 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__base with input of size 25 for LOIs [2022-11-26 00:37:51,642 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 21 for LOIs [2022-11-26 00:37:51,650 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 45 for LOIs [2022-11-26 00:37:51,703 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 41 for LOIs [2022-11-26 00:37:51,706 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-11-26 00:37:51,840 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:38:13,839 WARN L233 SmtUtils]: Spent 7.12s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:38:21,272 WARN L233 SmtUtils]: Spent 7.10s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:38:30,050 WARN L233 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 768 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:38:42,698 WARN L233 SmtUtils]: Spent 6.36s on a formula simplification. DAG size of input: 647 DAG size of output: 556 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:39:18,700 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '183960#(and (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~9#1| 2147483648)) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1|) (= ~executiveFloor~0 4) (<= 0 (+ ~currentFloorID~0 2147483648)) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= ~currentFloorID~0 2147483647) (= ~head~0.offset 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~9#1| 2147483647) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 2147483647) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~21#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |#NULL.offset| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1| 1) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| |timeShift_areDoorsOpen_#res#1|) (<= |timeShift_~tmp___9~2#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~21#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-11-26 00:39:18,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:39:18,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:39:18,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-26 00:39:18,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172022011] [2022-11-26 00:39:18,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:39:18,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 00:39:18,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:18,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 00:39:18,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=11216, Unknown=0, NotChecked=0, Total=12210 [2022-11-26 00:39:18,704 INFO L87 Difference]: Start difference. First operand 5929 states and 8566 transitions. Second operand has 22 states, 17 states have (on average 10.352941176470589) internal successors, (176), 19 states have internal predecessors, (176), 8 states have call successors, (61), 5 states have call predecessors, (61), 9 states have return successors, (60), 9 states have call predecessors, (60), 8 states have call successors, (60) [2022-11-26 00:39:22,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:22,733 INFO L93 Difference]: Finished difference Result 9192 states and 13279 transitions. [2022-11-26 00:39:22,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 00:39:22,734 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 10.352941176470589) internal successors, (176), 19 states have internal predecessors, (176), 8 states have call successors, (61), 5 states have call predecessors, (61), 9 states have return successors, (60), 9 states have call predecessors, (60), 8 states have call successors, (60) Word has length 251 [2022-11-26 00:39:22,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:22,765 INFO L225 Difference]: With dead ends: 9192 [2022-11-26 00:39:22,765 INFO L226 Difference]: Without dead ends: 6061 [2022-11-26 00:39:22,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 642 SyntacticMatches, 20 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5877 ImplicationChecksByTransitivity, 87.8s TimeCoverageRelationStatistics Valid=1188, Invalid=14312, Unknown=0, NotChecked=0, Total=15500 [2022-11-26 00:39:22,782 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 1717 mSDsluCounter, 6253 mSDsCounter, 0 mSdLazyCounter, 4207 mSolverCounterSat, 785 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1735 SdHoareTripleChecker+Valid, 7086 SdHoareTripleChecker+Invalid, 4992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 785 IncrementalHoareTripleChecker+Valid, 4207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:22,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1735 Valid, 7086 Invalid, 4992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [785 Valid, 4207 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-26 00:39:22,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2022-11-26 00:39:23,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 5893. [2022-11-26 00:39:23,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5893 states, 4324 states have (on average 1.4058741905642924) internal successors, (6079), 4461 states have internal predecessors, (6079), 1027 states have call successors, (1027), 498 states have call predecessors, (1027), 541 states have return successors, (1382), 1005 states have call predecessors, (1382), 1015 states have call successors, (1382) [2022-11-26 00:39:23,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5893 states to 5893 states and 8488 transitions. [2022-11-26 00:39:23,326 INFO L78 Accepts]: Start accepts. Automaton has 5893 states and 8488 transitions. Word has length 251 [2022-11-26 00:39:23,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:23,326 INFO L495 AbstractCegarLoop]: Abstraction has 5893 states and 8488 transitions. [2022-11-26 00:39:23,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 10.352941176470589) internal successors, (176), 19 states have internal predecessors, (176), 8 states have call successors, (61), 5 states have call predecessors, (61), 9 states have return successors, (60), 9 states have call predecessors, (60), 8 states have call successors, (60) [2022-11-26 00:39:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 5893 states and 8488 transitions. [2022-11-26 00:39:23,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2022-11-26 00:39:23,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:23,359 INFO L195 NwaCegarLoop]: trace histogram [15, 12, 12, 10, 10, 10, 10, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-11-26 00:39:23,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:23,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:23,567 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:23,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:23,568 INFO L85 PathProgramCache]: Analyzing trace with hash -136189591, now seen corresponding path program 1 times [2022-11-26 00:39:23,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:23,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746554248] [2022-11-26 00:39:23,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:23,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 87 proven. 128 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2022-11-26 00:39:27,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:27,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746554248] [2022-11-26 00:39:27,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746554248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:39:27,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407837987] [2022-11-26 00:39:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:27,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:27,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:27,183 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:27,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:39:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:27,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 3117 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:39:27,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 412 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-11-26 00:39:27,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:39:27,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407837987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:27,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:39:27,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [24] total 25 [2022-11-26 00:39:27,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458876637] [2022-11-26 00:39:27,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:27,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:39:27,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:27,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:39:27,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:39:27,807 INFO L87 Difference]: Start difference. First operand 5893 states and 8488 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2022-11-26 00:39:28,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:28,352 INFO L93 Difference]: Finished difference Result 9197 states and 13295 transitions. [2022-11-26 00:39:28,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:39:28,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) Word has length 393 [2022-11-26 00:39:28,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:28,375 INFO L225 Difference]: With dead ends: 9197 [2022-11-26 00:39:28,375 INFO L226 Difference]: Without dead ends: 5915 [2022-11-26 00:39:28,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:39:28,392 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 372 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:28,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 971 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:39:28,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2022-11-26 00:39:28,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 5893. [2022-11-26 00:39:28,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5893 states, 4324 states have (on average 1.3984736355226641) internal successors, (6047), 4461 states have internal predecessors, (6047), 1027 states have call successors, (1027), 498 states have call predecessors, (1027), 541 states have return successors, (1374), 1005 states have call predecessors, (1374), 1015 states have call successors, (1374) [2022-11-26 00:39:28,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5893 states to 5893 states and 8448 transitions. [2022-11-26 00:39:28,916 INFO L78 Accepts]: Start accepts. Automaton has 5893 states and 8448 transitions. Word has length 393 [2022-11-26 00:39:28,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:28,917 INFO L495 AbstractCegarLoop]: Abstraction has 5893 states and 8448 transitions. [2022-11-26 00:39:28,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2022-11-26 00:39:28,918 INFO L276 IsEmpty]: Start isEmpty. Operand 5893 states and 8448 transitions. [2022-11-26 00:39:28,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-11-26 00:39:28,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:28,944 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:28,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:29,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:29,154 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:29,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:29,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1462985469, now seen corresponding path program 1 times [2022-11-26 00:39:29,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:29,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328176180] [2022-11-26 00:39:29,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:29,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-11-26 00:39:29,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:29,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328176180] [2022-11-26 00:39:29,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328176180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:29,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:29,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:39:29,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745524727] [2022-11-26 00:39:29,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:29,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:39:29,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:29,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:39:29,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:39:29,496 INFO L87 Difference]: Start difference. First operand 5893 states and 8448 transitions. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 5 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) [2022-11-26 00:39:30,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:30,890 INFO L93 Difference]: Finished difference Result 12508 states and 17842 transitions. [2022-11-26 00:39:30,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:39:30,891 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 5 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) Word has length 265 [2022-11-26 00:39:30,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:30,926 INFO L225 Difference]: With dead ends: 12508 [2022-11-26 00:39:30,926 INFO L226 Difference]: Without dead ends: 8764 [2022-11-26 00:39:30,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:39:30,942 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 838 mSDsluCounter, 3045 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 3687 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:30,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 3687 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:39:30,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8764 states. [2022-11-26 00:39:31,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8764 to 8453. [2022-11-26 00:39:31,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8453 states, 6241 states have (on average 1.363563531485339) internal successors, (8510), 6462 states have internal predecessors, (8510), 1395 states have call successors, (1395), 717 states have call predecessors, (1395), 816 states have return successors, (2005), 1345 states have call predecessors, (2005), 1383 states have call successors, (2005) [2022-11-26 00:39:31,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8453 states to 8453 states and 11910 transitions. [2022-11-26 00:39:31,749 INFO L78 Accepts]: Start accepts. Automaton has 8453 states and 11910 transitions. Word has length 265 [2022-11-26 00:39:31,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:31,749 INFO L495 AbstractCegarLoop]: Abstraction has 8453 states and 11910 transitions. [2022-11-26 00:39:31,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 5 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) [2022-11-26 00:39:31,750 INFO L276 IsEmpty]: Start isEmpty. Operand 8453 states and 11910 transitions. [2022-11-26 00:39:31,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-11-26 00:39:31,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:31,789 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:31,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-26 00:39:31,789 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:31,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:31,790 INFO L85 PathProgramCache]: Analyzing trace with hash -805556088, now seen corresponding path program 1 times [2022-11-26 00:39:31,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:31,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752305526] [2022-11-26 00:39:31,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:31,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-26 00:39:32,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:32,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752305526] [2022-11-26 00:39:32,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752305526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:32,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:32,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:39:32,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767909977] [2022-11-26 00:39:32,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:32,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:39:32,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:32,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:39:32,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:39:32,145 INFO L87 Difference]: Start difference. First operand 8453 states and 11910 transitions. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 6 states have internal predecessors, (103), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-26 00:39:33,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:33,204 INFO L93 Difference]: Finished difference Result 14069 states and 19909 transitions. [2022-11-26 00:39:33,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:39:33,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 6 states have internal predecessors, (103), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) Word has length 269 [2022-11-26 00:39:33,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:33,249 INFO L225 Difference]: With dead ends: 14069 [2022-11-26 00:39:33,249 INFO L226 Difference]: Without dead ends: 8896 [2022-11-26 00:39:33,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:39:33,270 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 132 mSDsluCounter, 2707 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 3289 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:33,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 3289 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:39:33,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8896 states. [2022-11-26 00:39:33,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8896 to 8566. [2022-11-26 00:39:33,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8566 states, 6325 states have (on average 1.3622134387351779) internal successors, (8616), 6544 states have internal predecessors, (8616), 1411 states have call successors, (1411), 729 states have call predecessors, (1411), 829 states have return successors, (2026), 1364 states have call predecessors, (2026), 1399 states have call successors, (2026) [2022-11-26 00:39:34,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8566 states to 8566 states and 12053 transitions. [2022-11-26 00:39:34,028 INFO L78 Accepts]: Start accepts. Automaton has 8566 states and 12053 transitions. Word has length 269 [2022-11-26 00:39:34,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:34,029 INFO L495 AbstractCegarLoop]: Abstraction has 8566 states and 12053 transitions. [2022-11-26 00:39:34,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 6 states have internal predecessors, (103), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-26 00:39:34,029 INFO L276 IsEmpty]: Start isEmpty. Operand 8566 states and 12053 transitions. [2022-11-26 00:39:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2022-11-26 00:39:34,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:34,068 INFO L195 NwaCegarLoop]: trace histogram [18, 12, 12, 10, 10, 10, 10, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-11-26 00:39:34,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-26 00:39:34,068 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:34,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:34,069 INFO L85 PathProgramCache]: Analyzing trace with hash 345196000, now seen corresponding path program 1 times [2022-11-26 00:39:34,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:34,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601617761] [2022-11-26 00:39:34,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:34,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1004 backedges. 87 proven. 134 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2022-11-26 00:39:36,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:36,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601617761] [2022-11-26 00:39:36,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601617761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:39:36,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193330077] [2022-11-26 00:39:36,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:36,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:36,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:36,992 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:37,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:39:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:37,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 3167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:39:37,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1004 backedges. 439 proven. 0 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2022-11-26 00:39:37,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:39:37,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193330077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:37,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:39:37,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [24] total 27 [2022-11-26 00:39:37,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222732052] [2022-11-26 00:39:37,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:37,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:39:37,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:37,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:39:37,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:39:37,747 INFO L87 Difference]: Start difference. First operand 8566 states and 12053 transitions. Second operand has 5 states, 5 states have (on average 33.4) internal successors, (167), 5 states have internal predecessors, (167), 5 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (47), 5 states have call predecessors, (47), 5 states have call successors, (47) [2022-11-26 00:39:38,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:38,835 INFO L93 Difference]: Finished difference Result 18780 states and 26704 transitions. [2022-11-26 00:39:38,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:39:38,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 5 states have internal predecessors, (167), 5 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (47), 5 states have call predecessors, (47), 5 states have call successors, (47) Word has length 412 [2022-11-26 00:39:38,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:38,883 INFO L225 Difference]: With dead ends: 18780 [2022-11-26 00:39:38,883 INFO L226 Difference]: Without dead ends: 8710 [2022-11-26 00:39:38,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:39:38,924 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 379 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:38,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 1706 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:39:38,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8710 states. [2022-11-26 00:39:39,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8710 to 8566. [2022-11-26 00:39:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8566 states, 6325 states have (on average 1.3261660079051383) internal successors, (8388), 6544 states have internal predecessors, (8388), 1411 states have call successors, (1411), 729 states have call predecessors, (1411), 829 states have return successors, (2026), 1364 states have call predecessors, (2026), 1399 states have call successors, (2026) [2022-11-26 00:39:39,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8566 states to 8566 states and 11825 transitions. [2022-11-26 00:39:39,729 INFO L78 Accepts]: Start accepts. Automaton has 8566 states and 11825 transitions. Word has length 412 [2022-11-26 00:39:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:39,729 INFO L495 AbstractCegarLoop]: Abstraction has 8566 states and 11825 transitions. [2022-11-26 00:39:39,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 5 states have internal predecessors, (167), 5 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (47), 5 states have call predecessors, (47), 5 states have call successors, (47) [2022-11-26 00:39:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 8566 states and 11825 transitions. [2022-11-26 00:39:39,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2022-11-26 00:39:39,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:39,754 INFO L195 NwaCegarLoop]: trace histogram [17, 12, 12, 10, 10, 10, 10, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-11-26 00:39:39,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:39,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:39,955 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:39,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:39,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1024614013, now seen corresponding path program 1 times [2022-11-26 00:39:39,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:39,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582487190] [2022-11-26 00:39:39,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:39,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 87 proven. 132 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2022-11-26 00:39:42,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:42,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582487190] [2022-11-26 00:39:42,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582487190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:39:42,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583998055] [2022-11-26 00:39:42,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:42,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:42,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:42,470 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:42,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5932ce-ebb9-4930-b0c9-aedaee6e6e81/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 00:39:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:43,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 3154 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 00:39:43,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 274 proven. 107 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2022-11-26 00:39:43,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 83 proven. 33 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2022-11-26 00:39:44,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583998055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:39:44,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [596521995] [2022-11-26 00:39:44,174 INFO L159 IcfgInterpreter]: Started Sifa with 161 locations of interest [2022-11-26 00:39:44,174 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:39:44,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:39:44,175 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:39:44,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs