./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI --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 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e --- 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-5e519f3 [2022-11-03 03:27:43,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:27:43,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:27:43,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:27:43,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:27:43,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:27:43,270 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:27:43,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:27:43,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:27:43,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:27:43,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:27:43,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:27:43,288 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:27:43,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:27:43,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:27:43,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:27:43,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:27:43,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:27:43,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:27:43,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:27:43,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:27:43,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:27:43,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:27:43,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:27:43,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:27:43,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:27:43,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:27:43,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:27:43,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:27:43,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:27:43,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:27:43,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:27:43,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:27:43,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:27:43,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:27:43,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:27:43,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:27:43,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:27:43,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:27:43,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:27:43,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:27:43,340 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:27:43,376 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:27:43,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:27:43,377 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:27:43,378 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:27:43,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:27:43,379 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:27:43,379 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:27:43,379 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:27:43,379 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:27:43,380 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:27:43,381 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:27:43,381 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:27:43,381 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:27:43,381 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:27:43,382 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:27:43,382 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:27:43,382 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:27:43,382 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:27:43,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:27:43,383 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:27:43,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:27:43,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:27:43,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:27:43,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:27:43,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:27:43,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:27:43,385 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:27:43,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:27:43,385 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:27:43,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:27:43,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:27:43,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:27:43,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:27:43,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:27:43,387 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:27:43,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:27:43,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:27:43,387 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:27:43,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:27:43,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:27:43,388 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:27:43,388 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_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e [2022-11-03 03:27:43,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:27:43,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:27:43,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:27:43,658 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:27:43,659 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:27:43,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2022-11-03 03:27:43,746 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/data/4f582abd3/3b00771d553147569d6d53366a8831a4/FLAG97828ab4e [2022-11-03 03:27:44,319 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:27:44,319 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2022-11-03 03:27:44,338 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/data/4f582abd3/3b00771d553147569d6d53366a8831a4/FLAG97828ab4e [2022-11-03 03:27:44,577 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/data/4f582abd3/3b00771d553147569d6d53366a8831a4 [2022-11-03 03:27:44,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:27:44,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:27:44,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:27:44,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:27:44,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:27:44,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:27:44" (1/1) ... [2022-11-03 03:27:44,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a79032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:44, skipping insertion in model container [2022-11-03 03:27:44,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:27:44" (1/1) ... [2022-11-03 03:27:44,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:27:44,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:27:44,923 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2022-11-03 03:27:45,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:27:45,376 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:27:45,388 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2022-11-03 03:27:45,464 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:27:45,488 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:27:45,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:45 WrapperNode [2022-11-03 03:27:45,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:27:45,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:27:45,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:27:45,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:27:45,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:45" (1/1) ... [2022-11-03 03:27:45,530 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:45" (1/1) ... [2022-11-03 03:27:45,584 INFO L138 Inliner]: procedures = 92, calls = 335, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 1095 [2022-11-03 03:27:45,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:27:45,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:27:45,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:27:45,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:27:45,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:45" (1/1) ... [2022-11-03 03:27:45,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:45" (1/1) ... [2022-11-03 03:27:45,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:45" (1/1) ... [2022-11-03 03:27:45,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:45" (1/1) ... [2022-11-03 03:27:45,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:45" (1/1) ... [2022-11-03 03:27:45,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:45" (1/1) ... [2022-11-03 03:27:45,635 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:45" (1/1) ... [2022-11-03 03:27:45,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:45" (1/1) ... [2022-11-03 03:27:45,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:27:45,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:27:45,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:27:45,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:27:45,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:45" (1/1) ... [2022-11-03 03:27:45,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:27:45,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:27:45,680 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:27:45,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:27:45,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:27:45,751 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 03:27:45,751 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 03:27:45,751 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 03:27:45,751 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 03:27:45,752 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 03:27:45,752 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 03:27:45,752 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 03:27:45,752 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 03:27:45,752 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 03:27:45,753 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 03:27:45,753 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 03:27:45,753 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 03:27:45,753 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 03:27:45,753 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 03:27:45,753 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 03:27:45,754 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 03:27:45,754 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 03:27:45,754 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 03:27:45,754 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 03:27:45,754 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 03:27:45,754 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 03:27:45,755 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 03:27:45,755 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 03:27:45,755 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 03:27:45,755 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 03:27:45,756 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 03:27:45,756 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 03:27:45,756 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 03:27:45,756 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-03 03:27:45,758 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-03 03:27:45,758 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 03:27:45,758 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 03:27:45,759 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 03:27:45,759 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 03:27:45,759 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 03:27:45,759 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 03:27:45,759 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 03:27:45,760 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 03:27:45,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:27:45,760 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 03:27:45,760 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 03:27:45,760 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 03:27:45,761 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 03:27:45,761 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 03:27:45,762 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 03:27:45,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:27:45,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:27:45,763 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 03:27:45,764 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 03:27:45,927 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:27:45,929 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:27:47,110 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:27:47,964 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:27:47,965 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:27:47,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:27:47 BoogieIcfgContainer [2022-11-03 03:27:47,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:27:47,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:27:47,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:27:47,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:27:47,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:27:44" (1/3) ... [2022-11-03 03:27:47,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce7f622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:27:47, skipping insertion in model container [2022-11-03 03:27:47,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:45" (2/3) ... [2022-11-03 03:27:47,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce7f622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:27:47, skipping insertion in model container [2022-11-03 03:27:47,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:27:47" (3/3) ... [2022-11-03 03:27:47,980 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product27.cil.c [2022-11-03 03:27:47,999 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:27:48,000 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:27:48,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:27:48,098 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;@4563ed72, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:27:48,098 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:27:48,104 INFO L276 IsEmpty]: Start isEmpty. Operand has 353 states, 235 states have (on average 1.5702127659574467) internal successors, (369), 251 states have internal predecessors, (369), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2022-11-03 03:27:48,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 03:27:48,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:48,138 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] [2022-11-03 03:27:48,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:48,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:48,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1884041600, now seen corresponding path program 1 times [2022-11-03 03:27:48,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:48,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145326941] [2022-11-03 03:27:48,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:48,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:27:48,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:48,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145326941] [2022-11-03 03:27:48,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145326941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:48,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:48,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:27:48,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641868147] [2022-11-03 03:27:48,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:48,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:27:48,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:49,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:27:49,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:49,027 INFO L87 Difference]: Start difference. First operand has 353 states, 235 states have (on average 1.5702127659574467) internal successors, (369), 251 states have internal predecessors, (369), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) 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) [2022-11-03 03:27:49,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:49,958 INFO L93 Difference]: Finished difference Result 1037 states and 1657 transitions. [2022-11-03 03:27:49,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:27:49,961 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 [2022-11-03 03:27:49,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:49,987 INFO L225 Difference]: With dead ends: 1037 [2022-11-03 03:27:49,987 INFO L226 Difference]: Without dead ends: 685 [2022-11-03 03:27:49,997 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 [2022-11-03 03:27:50,001 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 530 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:50,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 2306 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:27:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-11-03 03:27:50,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 679. [2022-11-03 03:27:50,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 455 states have (on average 1.5604395604395604) internal successors, (710), 484 states have internal predecessors, (710), 180 states have call successors, (180), 45 states have call predecessors, (180), 43 states have return successors, (186), 174 states have call predecessors, (186), 178 states have call successors, (186) [2022-11-03 03:27:50,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1076 transitions. [2022-11-03 03:27:50,152 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1076 transitions. Word has length 73 [2022-11-03 03:27:50,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:50,153 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 1076 transitions. [2022-11-03 03:27:50,154 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) [2022-11-03 03:27:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1076 transitions. [2022-11-03 03:27:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:27:50,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:50,193 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] [2022-11-03 03:27:50,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:27:50,194 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:50,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:50,195 INFO L85 PathProgramCache]: Analyzing trace with hash 526041047, now seen corresponding path program 1 times [2022-11-03 03:27:50,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:50,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011761352] [2022-11-03 03:27:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:50,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:50,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:27:50,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:50,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011761352] [2022-11-03 03:27:50,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011761352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:50,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:50,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:27:50,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316896099] [2022-11-03 03:27:50,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:50,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:27:50,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:50,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:27:50,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:50,706 INFO L87 Difference]: Start difference. First operand 679 states and 1076 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) [2022-11-03 03:27:51,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:51,457 INFO L93 Difference]: Finished difference Result 776 states and 1223 transitions. [2022-11-03 03:27:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:27:51,458 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 [2022-11-03 03:27:51,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:51,467 INFO L225 Difference]: With dead ends: 776 [2022-11-03 03:27:51,467 INFO L226 Difference]: Without dead ends: 774 [2022-11-03 03:27:51,472 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 [2022-11-03 03:27:51,473 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 637 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:51,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 1626 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:27:51,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-11-03 03:27:51,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 764. [2022-11-03 03:27:51,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 506 states have (on average 1.5276679841897234) internal successors, (773), 535 states have internal predecessors, (773), 202 states have call successors, (202), 58 states have call predecessors, (202), 55 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-03 03:27:51,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1189 transitions. [2022-11-03 03:27:51,560 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1189 transitions. Word has length 77 [2022-11-03 03:27:51,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:51,564 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1189 transitions. [2022-11-03 03:27:51,565 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) [2022-11-03 03:27:51,565 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1189 transitions. [2022-11-03 03:27:51,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 03:27:51,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:51,572 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] [2022-11-03 03:27:51,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:27:51,573 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:51,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:51,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1228260862, now seen corresponding path program 1 times [2022-11-03 03:27:51,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:51,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850694365] [2022-11-03 03:27:51,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:51,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-03 03:27:51,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:51,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850694365] [2022-11-03 03:27:51,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850694365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:51,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:51,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:27:51,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96312881] [2022-11-03 03:27:51,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:51,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:27:51,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:51,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:27:51,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:27:51,850 INFO L87 Difference]: Start difference. First operand 764 states and 1189 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) [2022-11-03 03:27:52,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:52,075 INFO L93 Difference]: Finished difference Result 1554 states and 2447 transitions. [2022-11-03 03:27:52,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:27:52,075 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 [2022-11-03 03:27:52,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:52,081 INFO L225 Difference]: With dead ends: 1554 [2022-11-03 03:27:52,081 INFO L226 Difference]: Without dead ends: 802 [2022-11-03 03:27:52,089 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 [2022-11-03 03:27:52,094 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 54 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:52,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1534 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:27:52,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-11-03 03:27:52,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 768. [2022-11-03 03:27:52,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 510 states have (on average 1.5235294117647058) internal successors, (777), 539 states have internal predecessors, (777), 202 states have call successors, (202), 58 states have call predecessors, (202), 55 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-03 03:27:52,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1193 transitions. [2022-11-03 03:27:52,150 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1193 transitions. Word has length 108 [2022-11-03 03:27:52,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:52,151 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1193 transitions. [2022-11-03 03:27:52,151 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) [2022-11-03 03:27:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1193 transitions. [2022-11-03 03:27:52,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 03:27:52,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:52,159 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] [2022-11-03 03:27:52,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:27:52,159 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:52,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:52,160 INFO L85 PathProgramCache]: Analyzing trace with hash 782844242, now seen corresponding path program 1 times [2022-11-03 03:27:52,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:52,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477163650] [2022-11-03 03:27:52,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:52,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:27:52,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:52,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477163650] [2022-11-03 03:27:52,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477163650] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:27:52,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614865643] [2022-11-03 03:27:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:52,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:27:52,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:27:52,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:27:52,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:27:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:52,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:27:52,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 03:27:52,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:52,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614865643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:52,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:27:52,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-03 03:27:52,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308990858] [2022-11-03 03:27:52,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:52,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:27:52,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:52,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:27:52,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:27:52,892 INFO L87 Difference]: Start difference. First operand 768 states and 1193 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) [2022-11-03 03:27:53,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:53,232 INFO L93 Difference]: Finished difference Result 1602 states and 2536 transitions. [2022-11-03 03:27:53,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:27:53,233 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 [2022-11-03 03:27:53,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:53,243 INFO L225 Difference]: With dead ends: 1602 [2022-11-03 03:27:53,243 INFO L226 Difference]: Without dead ends: 846 [2022-11-03 03:27:53,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:27:53,255 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 213 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:53,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1308 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:27:53,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-11-03 03:27:53,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 846. [2022-11-03 03:27:53,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 586 states have (on average 1.575085324232082) internal successors, (923), 615 states have internal predecessors, (923), 202 states have call successors, (202), 60 states have call predecessors, (202), 57 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-03 03:27:53,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1339 transitions. [2022-11-03 03:27:53,310 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1339 transitions. Word has length 111 [2022-11-03 03:27:53,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:53,311 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1339 transitions. [2022-11-03 03:27:53,311 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) [2022-11-03 03:27:53,311 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1339 transitions. [2022-11-03 03:27:53,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 03:27:53,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:53,317 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] [2022-11-03 03:27:53,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:53,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-03 03:27:53,531 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:53,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:53,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2008837937, now seen corresponding path program 1 times [2022-11-03 03:27:53,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:53,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709202032] [2022-11-03 03:27:53,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:53,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:53,777 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-03 03:27:53,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:53,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709202032] [2022-11-03 03:27:53,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709202032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:27:53,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162032889] [2022-11-03 03:27:53,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:53,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:27:53,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:27:53,779 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:27:53,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:27:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:54,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:27:54,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:27:54,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:54,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162032889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:54,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:27:54,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 03:27:54,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398833896] [2022-11-03 03:27:54,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:54,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:27:54,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:54,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:27:54,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:27:54,143 INFO L87 Difference]: Start difference. First operand 846 states and 1339 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) [2022-11-03 03:27:54,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:54,479 INFO L93 Difference]: Finished difference Result 1758 states and 2826 transitions. [2022-11-03 03:27:54,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:27:54,480 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 [2022-11-03 03:27:54,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:54,486 INFO L225 Difference]: With dead ends: 1758 [2022-11-03 03:27:54,486 INFO L226 Difference]: Without dead ends: 924 [2022-11-03 03:27:54,491 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 [2022-11-03 03:27:54,492 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 211 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:54,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1308 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:27:54,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-11-03 03:27:54,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 924. [2022-11-03 03:27:54,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 662 states have (on average 1.6148036253776434) internal successors, (1069), 691 states have internal predecessors, (1069), 202 states have call successors, (202), 62 states have call predecessors, (202), 59 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-03 03:27:54,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1485 transitions. [2022-11-03 03:27:54,542 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1485 transitions. Word has length 116 [2022-11-03 03:27:54,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:54,542 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1485 transitions. [2022-11-03 03:27:54,543 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) [2022-11-03 03:27:54,543 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1485 transitions. [2022-11-03 03:27:54,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 03:27:54,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:54,547 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] [2022-11-03 03:27:54,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:54,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:27:54,775 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:54,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:54,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1280945471, now seen corresponding path program 1 times [2022-11-03 03:27:54,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:54,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321140338] [2022-11-03 03:27:54,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:54,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-03 03:27:54,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:54,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321140338] [2022-11-03 03:27:54,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321140338] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:27:54,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271636637] [2022-11-03 03:27:54,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:54,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:27:54,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:27:54,965 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:27:54,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:27:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:55,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:27:55,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:27:55,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:55,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271636637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:55,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:27:55,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 03:27:55,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608765345] [2022-11-03 03:27:55,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:55,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:27:55,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:55,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:27:55,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:27:55,340 INFO L87 Difference]: Start difference. First operand 924 states and 1485 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) [2022-11-03 03:27:55,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:55,686 INFO L93 Difference]: Finished difference Result 1914 states and 3116 transitions. [2022-11-03 03:27:55,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:27:55,687 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 [2022-11-03 03:27:55,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:55,693 INFO L225 Difference]: With dead ends: 1914 [2022-11-03 03:27:55,693 INFO L226 Difference]: Without dead ends: 1002 [2022-11-03 03:27:55,698 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 [2022-11-03 03:27:55,699 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 209 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:55,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1308 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:27:55,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-11-03 03:27:55,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1002. [2022-11-03 03:27:55,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 738 states have (on average 1.646341463414634) internal successors, (1215), 767 states have internal predecessors, (1215), 202 states have call successors, (202), 64 states have call predecessors, (202), 61 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-03 03:27:55,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1631 transitions. [2022-11-03 03:27:55,754 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1631 transitions. Word has length 120 [2022-11-03 03:27:55,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:55,755 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1631 transitions. [2022-11-03 03:27:55,755 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) [2022-11-03 03:27:55,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1631 transitions. [2022-11-03 03:27:55,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 03:27:55,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:55,761 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] [2022-11-03 03:27:55,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:55,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 03:27:55,975 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:55,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:55,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1320443278, now seen corresponding path program 1 times [2022-11-03 03:27:55,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:55,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227691262] [2022-11-03 03:27:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:55,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:56,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 03:27:56,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:56,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227691262] [2022-11-03 03:27:56,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227691262] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:27:56,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671633938] [2022-11-03 03:27:56,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:56,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:27:56,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:27:56,150 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:27:56,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:27:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:56,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:27:56,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 03:27:56,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:27:56,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671633938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:56,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:27:56,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 03:27:56,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560618713] [2022-11-03 03:27:56,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:56,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:27:56,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:56,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:27:56,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:27:56,510 INFO L87 Difference]: Start difference. First operand 1002 states and 1631 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) [2022-11-03 03:27:56,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:56,808 INFO L93 Difference]: Finished difference Result 2070 states and 3406 transitions. [2022-11-03 03:27:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:27:56,809 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 [2022-11-03 03:27:56,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:56,815 INFO L225 Difference]: With dead ends: 2070 [2022-11-03 03:27:56,816 INFO L226 Difference]: Without dead ends: 1080 [2022-11-03 03:27:56,821 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 [2022-11-03 03:27:56,821 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 207 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:56,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1308 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:27:56,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-11-03 03:27:56,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1080. [2022-11-03 03:27:56,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 814 states have (on average 1.671990171990172) internal successors, (1361), 843 states have internal predecessors, (1361), 202 states have call successors, (202), 66 states have call predecessors, (202), 63 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-03 03:27:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1777 transitions. [2022-11-03 03:27:56,868 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1777 transitions. Word has length 123 [2022-11-03 03:27:56,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:56,868 INFO L495 AbstractCegarLoop]: Abstraction has 1080 states and 1777 transitions. [2022-11-03 03:27:56,868 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) [2022-11-03 03:27:56,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1777 transitions. [2022-11-03 03:27:56,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 03:27:56,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:56,872 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] [2022-11-03 03:27:56,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:57,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:27:57,087 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:57,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:57,087 INFO L85 PathProgramCache]: Analyzing trace with hash 2027278208, now seen corresponding path program 1 times [2022-11-03 03:27:57,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:57,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556051804] [2022-11-03 03:27:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:57,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:27:57,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:57,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556051804] [2022-11-03 03:27:57,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556051804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:27:57,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610180908] [2022-11-03 03:27:57,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:57,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:27:57,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:27:57,394 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:27:57,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:27:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:57,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 1290 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 03:27:57,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-03 03:27:58,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:28:49,895 WARN L234 SmtUtils]: Spent 48.07s 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) [2022-11-03 03:28:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-03 03:28:52,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610180908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:28:52,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1325673178] [2022-11-03 03:28:52,867 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2022-11-03 03:28:52,868 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:28:52,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:28:52,876 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:28:52,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:28:55,823 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-03 03:28:59,747 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-03 03:29:00,397 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 570 for LOIs [2022-11-03 03:29:08,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:08,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:08,764 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 03:29:08,767 INFO L158 Benchmark]: Toolchain (without parser) took 84183.46ms. Allocated memory was 121.6MB in the beginning and 549.5MB in the end (delta: 427.8MB). Free memory was 87.5MB in the beginning and 401.8MB in the end (delta: -314.3MB). Peak memory consumption was 345.0MB. Max. memory is 16.1GB. [2022-11-03 03:29:08,767 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 88.1MB. Free memory was 46.8MB in the beginning and 46.8MB in the end (delta: 9.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:29:08,768 INFO L158 Benchmark]: CACSL2BoogieTranslator took 900.82ms. Allocated memory is still 121.6MB. Free memory was 87.5MB in the beginning and 70.9MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-03 03:29:08,768 INFO L158 Benchmark]: Boogie Procedure Inliner took 95.27ms. Allocated memory is still 121.6MB. Free memory was 70.9MB in the beginning and 65.5MB in the end (delta: 5.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 03:29:08,768 INFO L158 Benchmark]: Boogie Preprocessor took 62.98ms. Allocated memory is still 121.6MB. Free memory was 65.5MB in the beginning and 60.5MB in the end (delta: 4.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 03:29:08,769 INFO L158 Benchmark]: RCFGBuilder took 2321.26ms. Allocated memory was 121.6MB in the beginning and 174.1MB in the end (delta: 52.4MB). Free memory was 59.8MB in the beginning and 133.1MB in the end (delta: -73.3MB). Peak memory consumption was 58.3MB. Max. memory is 16.1GB. [2022-11-03 03:29:08,769 INFO L158 Benchmark]: TraceAbstraction took 80794.92ms. Allocated memory was 174.1MB in the beginning and 549.5MB in the end (delta: 375.4MB). Free memory was 132.1MB in the beginning and 401.8MB in the end (delta: -269.7MB). Peak memory consumption was 338.5MB. Max. memory is 16.1GB. [2022-11-03 03:29:08,771 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 88.1MB. Free memory was 46.8MB in the beginning and 46.8MB in the end (delta: 9.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 900.82ms. Allocated memory is still 121.6MB. Free memory was 87.5MB in the beginning and 70.9MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 95.27ms. Allocated memory is still 121.6MB. Free memory was 70.9MB in the beginning and 65.5MB in the end (delta: 5.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 62.98ms. Allocated memory is still 121.6MB. Free memory was 65.5MB in the beginning and 60.5MB in the end (delta: 4.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 2321.26ms. Allocated memory was 121.6MB in the beginning and 174.1MB in the end (delta: 52.4MB). Free memory was 59.8MB in the beginning and 133.1MB in the end (delta: -73.3MB). Peak memory consumption was 58.3MB. Max. memory is 16.1GB. * TraceAbstraction took 80794.92ms. Allocated memory was 174.1MB in the beginning and 549.5MB in the end (delta: 375.4MB). Free memory was 132.1MB in the beginning and 401.8MB in the end (delta: -269.7MB). Peak memory consumption was 338.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 03:29:08,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI --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 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e --- 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-5e519f3 [2022-11-03 03:29:11,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:29:11,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:29:11,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:29:11,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:29:11,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:29:11,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:29:11,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:29:11,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:29:11,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:29:11,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:29:11,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:29:11,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:29:11,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:29:11,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:29:11,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:29:11,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:29:11,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:29:11,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:29:11,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:29:11,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:29:11,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:29:11,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:29:11,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:29:11,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:29:11,705 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:29:11,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:29:11,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:29:11,707 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:29:11,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:29:11,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:29:11,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:29:11,718 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:29:11,719 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:29:11,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:29:11,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:29:11,722 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:29:11,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:29:11,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:29:11,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:29:11,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:29:11,727 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 03:29:11,779 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:29:11,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:29:11,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:29:11,780 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:29:11,781 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:29:11,781 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:29:11,781 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:29:11,782 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:29:11,782 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:29:11,782 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:29:11,783 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:29:11,783 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:29:11,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:29:11,784 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:29:11,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:29:11,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:29:11,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:29:11,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:29:11,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:29:11,786 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:29:11,786 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:29:11,786 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:29:11,787 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:29:11,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:29:11,787 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:29:11,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:29:11,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:29:11,788 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:29:11,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:29:11,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:29:11,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:29:11,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:29:11,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:29:11,790 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:29:11,790 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:29:11,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:29:11,791 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:29:11,791 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:29:11,791 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e [2022-11-03 03:29:12,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:29:12,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:29:12,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:29:12,376 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:29:12,377 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:29:12,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2022-11-03 03:29:12,463 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/data/4f1aa5bf3/6436557ca89d4f02be654b8fa5a4ec83/FLAG966f59fbe [2022-11-03 03:29:13,235 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:29:13,236 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2022-11-03 03:29:13,261 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/data/4f1aa5bf3/6436557ca89d4f02be654b8fa5a4ec83/FLAG966f59fbe [2022-11-03 03:29:13,400 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/data/4f1aa5bf3/6436557ca89d4f02be654b8fa5a4ec83 [2022-11-03 03:29:13,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:29:13,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:29:13,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:29:13,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:29:13,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:29:13,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:29:13" (1/1) ... [2022-11-03 03:29:13,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71ab0f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:13, skipping insertion in model container [2022-11-03 03:29:13,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:29:13" (1/1) ... [2022-11-03 03:29:13,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:29:13,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:29:13,756 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2022-11-03 03:29:14,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:29:14,355 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 03:29:14,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:29:14,385 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2022-11-03 03:29:14,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:29:14,541 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:29:14,555 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2022-11-03 03:29:14,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:29:14,668 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:29:14,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:14 WrapperNode [2022-11-03 03:29:14,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:29:14,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:29:14,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:29:14,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:29:14,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:14" (1/1) ... [2022-11-03 03:29:14,708 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:14" (1/1) ... [2022-11-03 03:29:14,777 INFO L138 Inliner]: procedures = 94, calls = 335, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 1036 [2022-11-03 03:29:14,777 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:29:14,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:29:14,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:29:14,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:29:14,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:14" (1/1) ... [2022-11-03 03:29:14,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:14" (1/1) ... [2022-11-03 03:29:14,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:14" (1/1) ... [2022-11-03 03:29:14,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:14" (1/1) ... [2022-11-03 03:29:14,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:14" (1/1) ... [2022-11-03 03:29:14,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:14" (1/1) ... [2022-11-03 03:29:14,881 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:14" (1/1) ... [2022-11-03 03:29:14,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:14" (1/1) ... [2022-11-03 03:29:14,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:29:14,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:29:14,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:29:14,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:29:14,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:14" (1/1) ... [2022-11-03 03:29:14,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:29:14,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:14,932 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:29:14,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:29:15,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:29:15,031 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 03:29:15,031 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 03:29:15,031 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 03:29:15,031 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 03:29:15,032 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 03:29:15,032 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 03:29:15,032 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 03:29:15,032 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 03:29:15,032 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 03:29:15,032 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 03:29:15,033 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 03:29:15,033 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 03:29:15,033 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 03:29:15,033 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 03:29:15,033 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 03:29:15,033 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 03:29:15,034 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 03:29:15,034 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 03:29:15,034 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 03:29:15,034 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 03:29:15,034 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 03:29:15,034 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 03:29:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 03:29:15,035 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 03:29:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 03:29:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 03:29:15,035 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 03:29:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 03:29:15,036 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 03:29:15,036 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-03 03:29:15,036 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-03 03:29:15,036 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 03:29:15,036 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 03:29:15,036 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 03:29:15,037 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 03:29:15,037 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 03:29:15,037 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 03:29:15,037 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 03:29:15,037 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 03:29:15,037 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 03:29:15,038 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 03:29:15,038 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 03:29:15,038 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 03:29:15,038 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 03:29:15,038 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 03:29:15,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:29:15,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:29:15,039 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 03:29:15,039 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 03:29:15,274 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:29:15,277 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:29:16,884 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:29:16,909 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:29:16,910 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:29:16,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:29:16 BoogieIcfgContainer [2022-11-03 03:29:16,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:29:16,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:29:16,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:29:16,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:29:16,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:29:13" (1/3) ... [2022-11-03 03:29:16,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a197034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:29:16, skipping insertion in model container [2022-11-03 03:29:16,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:14" (2/3) ... [2022-11-03 03:29:16,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a197034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:29:16, skipping insertion in model container [2022-11-03 03:29:16,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:29:16" (3/3) ... [2022-11-03 03:29:16,926 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product27.cil.c [2022-11-03 03:29:16,956 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:29:16,956 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:29:17,072 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:29:17,082 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;@109e32e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:29:17,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:29:17,090 INFO L276 IsEmpty]: Start isEmpty. Operand has 541 states, 423 states have (on average 1.6784869976359338) internal successors, (710), 439 states have internal predecessors, (710), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2022-11-03 03:29:17,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-03 03:29:17,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:17,143 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:29:17,144 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:17,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:17,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1734862310, now seen corresponding path program 1 times [2022-11-03 03:29:17,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:17,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513316674] [2022-11-03 03:29:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:17,171 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:17,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:17,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:17,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:29:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:17,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:29:17,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:29:17,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:17,802 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:17,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513316674] [2022-11-03 03:29:17,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513316674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:17,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:17,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:17,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774467054] [2022-11-03 03:29:17,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:17,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:17,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:17,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:17,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:17,864 INFO L87 Difference]: Start difference. First operand has 541 states, 423 states have (on average 1.6784869976359338) internal successors, (710), 439 states have internal predecessors, (710), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:18,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:18,123 INFO L93 Difference]: Finished difference Result 1075 states and 1792 transitions. [2022-11-03 03:29:18,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:29:18,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2022-11-03 03:29:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:18,149 INFO L225 Difference]: With dead ends: 1075 [2022-11-03 03:29:18,149 INFO L226 Difference]: Without dead ends: 536 [2022-11-03 03:29:18,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:18,166 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 15 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2627 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:18,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 2627 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:18,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-03 03:29:18,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2022-11-03 03:29:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 419 states have (on average 1.668257756563246) internal successors, (699), 434 states have internal predecessors, (699), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-03 03:29:18,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 884 transitions. [2022-11-03 03:29:18,275 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 884 transitions. Word has length 101 [2022-11-03 03:29:18,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:18,275 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 884 transitions. [2022-11-03 03:29:18,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:18,276 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 884 transitions. [2022-11-03 03:29:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 03:29:18,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:18,283 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:29:18,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:18,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:18,503 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:18,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1214197739, now seen corresponding path program 1 times [2022-11-03 03:29:18,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:18,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960407572] [2022-11-03 03:29:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:18,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:18,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:18,506 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:18,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:29:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:18,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:29:18,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:29:18,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:18,998 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:18,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960407572] [2022-11-03 03:29:19,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960407572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:19,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:19,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:19,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779734764] [2022-11-03 03:29:19,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:19,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:19,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:19,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:19,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:19,013 INFO L87 Difference]: Start difference. First operand 536 states and 884 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:19,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:19,121 INFO L93 Difference]: Finished difference Result 1055 states and 1745 transitions. [2022-11-03 03:29:19,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:19,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 102 [2022-11-03 03:29:19,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:19,133 INFO L225 Difference]: With dead ends: 1055 [2022-11-03 03:29:19,134 INFO L226 Difference]: Without dead ends: 536 [2022-11-03 03:29:19,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:19,139 INFO L413 NwaCegarLoop]: 868 mSDtfsCounter, 12 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2595 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:19,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2595 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:29:19,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-03 03:29:19,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2022-11-03 03:29:19,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 419 states have (on average 1.665871121718377) internal successors, (698), 434 states have internal predecessors, (698), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-03 03:29:19,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 883 transitions. [2022-11-03 03:29:19,202 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 883 transitions. Word has length 102 [2022-11-03 03:29:19,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:19,203 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 883 transitions. [2022-11-03 03:29:19,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:19,203 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 883 transitions. [2022-11-03 03:29:19,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 03:29:19,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:19,213 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:29:19,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:19,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:19,427 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:19,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:19,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1899905206, now seen corresponding path program 1 times [2022-11-03 03:29:19,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:19,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616763891] [2022-11-03 03:29:19,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:19,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:19,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:19,430 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:19,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:29:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:19,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:29:19,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:29:19,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:19,856 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:19,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616763891] [2022-11-03 03:29:19,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616763891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:19,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:19,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:19,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108867463] [2022-11-03 03:29:19,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:19,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:19,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:19,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:19,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:19,859 INFO L87 Difference]: Start difference. First operand 536 states and 883 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:19,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:19,944 INFO L93 Difference]: Finished difference Result 1055 states and 1744 transitions. [2022-11-03 03:29:19,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:19,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 103 [2022-11-03 03:29:19,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:19,949 INFO L225 Difference]: With dead ends: 1055 [2022-11-03 03:29:19,949 INFO L226 Difference]: Without dead ends: 536 [2022-11-03 03:29:19,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:19,955 INFO L413 NwaCegarLoop]: 868 mSDtfsCounter, 10 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2595 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:19,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 2595 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:29:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-03 03:29:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2022-11-03 03:29:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 419 states have (on average 1.6634844868735084) internal successors, (697), 434 states have internal predecessors, (697), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-03 03:29:19,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 882 transitions. [2022-11-03 03:29:19,985 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 882 transitions. Word has length 103 [2022-11-03 03:29:19,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:19,986 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 882 transitions. [2022-11-03 03:29:19,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:19,986 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 882 transitions. [2022-11-03 03:29:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 03:29:19,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:19,991 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:29:20,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:20,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:20,211 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:20,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:20,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1141159367, now seen corresponding path program 1 times [2022-11-03 03:29:20,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:20,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227346080] [2022-11-03 03:29:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:20,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:20,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:20,218 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:20,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:29:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:20,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:29:20,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:29:20,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:20,624 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:20,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227346080] [2022-11-03 03:29:20,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227346080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:20,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:20,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:20,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656310539] [2022-11-03 03:29:20,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:20,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:20,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:20,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:20,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:20,634 INFO L87 Difference]: Start difference. First operand 536 states and 882 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:20,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:20,712 INFO L93 Difference]: Finished difference Result 1055 states and 1743 transitions. [2022-11-03 03:29:20,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:20,713 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2022-11-03 03:29:20,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:20,718 INFO L225 Difference]: With dead ends: 1055 [2022-11-03 03:29:20,718 INFO L226 Difference]: Without dead ends: 536 [2022-11-03 03:29:20,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:20,729 INFO L413 NwaCegarLoop]: 868 mSDtfsCounter, 8 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2595 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:20,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2595 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:29:20,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-03 03:29:20,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2022-11-03 03:29:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 419 states have (on average 1.6610978520286397) internal successors, (696), 434 states have internal predecessors, (696), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-03 03:29:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 881 transitions. [2022-11-03 03:29:20,775 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 881 transitions. Word has length 104 [2022-11-03 03:29:20,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:20,775 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 881 transitions. [2022-11-03 03:29:20,776 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:20,776 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 881 transitions. [2022-11-03 03:29:20,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-03 03:29:20,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:20,783 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:29:20,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:21,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:21,000 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:21,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:21,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1445965998, now seen corresponding path program 1 times [2022-11-03 03:29:21,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:21,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639541506] [2022-11-03 03:29:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:21,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:21,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:21,003 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:21,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:29:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:21,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:29:21,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:29:21,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:21,385 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:21,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639541506] [2022-11-03 03:29:21,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639541506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:21,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:21,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:21,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631053211] [2022-11-03 03:29:21,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:21,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:21,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:21,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:21,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:21,388 INFO L87 Difference]: Start difference. First operand 536 states and 881 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:21,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:21,466 INFO L93 Difference]: Finished difference Result 1055 states and 1742 transitions. [2022-11-03 03:29:21,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:21,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 105 [2022-11-03 03:29:21,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:21,471 INFO L225 Difference]: With dead ends: 1055 [2022-11-03 03:29:21,471 INFO L226 Difference]: Without dead ends: 536 [2022-11-03 03:29:21,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:21,476 INFO L413 NwaCegarLoop]: 868 mSDtfsCounter, 6 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2595 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:21,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2595 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:29:21,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-03 03:29:21,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2022-11-03 03:29:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 419 states have (on average 1.6587112171837708) internal successors, (695), 434 states have internal predecessors, (695), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-03 03:29:21,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 880 transitions. [2022-11-03 03:29:21,502 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 880 transitions. Word has length 105 [2022-11-03 03:29:21,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:21,503 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 880 transitions. [2022-11-03 03:29:21,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:21,503 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 880 transitions. [2022-11-03 03:29:21,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 03:29:21,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:21,507 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:29:21,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:21,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:21,725 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:21,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:21,726 INFO L85 PathProgramCache]: Analyzing trace with hash -583314525, now seen corresponding path program 1 times [2022-11-03 03:29:21,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:21,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629253764] [2022-11-03 03:29:21,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:21,727 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:21,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:21,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:21,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:29:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:22,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:29:22,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:29:22,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:22,151 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:22,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629253764] [2022-11-03 03:29:22,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629253764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:22,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:22,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:29:22,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462275997] [2022-11-03 03:29:22,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:22,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:29:22,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:22,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:29:22,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:29:22,155 INFO L87 Difference]: Start difference. First operand 536 states and 880 transitions. Second operand has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:29:22,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:22,382 INFO L93 Difference]: Finished difference Result 1066 states and 1759 transitions. [2022-11-03 03:29:22,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:29:22,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2022-11-03 03:29:22,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:22,390 INFO L225 Difference]: With dead ends: 1066 [2022-11-03 03:29:22,390 INFO L226 Difference]: Without dead ends: 551 [2022-11-03 03:29:22,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:22,399 INFO L413 NwaCegarLoop]: 866 mSDtfsCounter, 117 mSDsluCounter, 4230 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 5096 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:22,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 5096 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:22,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-11-03 03:29:22,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 549. [2022-11-03 03:29:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 429 states have (on average 1.655011655011655) internal successors, (710), 446 states have internal predecessors, (710), 94 states have call successors, (94), 24 states have call predecessors, (94), 25 states have return successors, (96), 91 states have call predecessors, (96), 93 states have call successors, (96) [2022-11-03 03:29:22,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 900 transitions. [2022-11-03 03:29:22,431 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 900 transitions. Word has length 106 [2022-11-03 03:29:22,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:22,432 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 900 transitions. [2022-11-03 03:29:22,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:29:22,432 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 900 transitions. [2022-11-03 03:29:22,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 03:29:22,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:22,436 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:29:22,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:22,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:22,658 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:22,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:22,659 INFO L85 PathProgramCache]: Analyzing trace with hash 355217090, now seen corresponding path program 1 times [2022-11-03 03:29:22,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:22,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082068333] [2022-11-03 03:29:22,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:22,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:22,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:22,661 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:22,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:29:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:22,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:29:22,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:29:23,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:23,024 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:23,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082068333] [2022-11-03 03:29:23,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082068333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:23,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:23,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:23,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302205786] [2022-11-03 03:29:23,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:23,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:23,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:23,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:23,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:23,027 INFO L87 Difference]: Start difference. First operand 549 states and 900 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:23,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:23,114 INFO L93 Difference]: Finished difference Result 1073 states and 1770 transitions. [2022-11-03 03:29:23,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:29:23,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2022-11-03 03:29:23,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:23,118 INFO L225 Difference]: With dead ends: 1073 [2022-11-03 03:29:23,118 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 03:29:23,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:23,122 INFO L413 NwaCegarLoop]: 867 mSDtfsCounter, 6 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2594 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:23,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2594 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:29:23,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 03:29:23,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 545. [2022-11-03 03:29:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 427 states have (on average 1.6557377049180328) internal successors, (707), 443 states have internal predecessors, (707), 93 states have call successors, (93), 24 states have call predecessors, (93), 24 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2022-11-03 03:29:23,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 893 transitions. [2022-11-03 03:29:23,145 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 893 transitions. Word has length 106 [2022-11-03 03:29:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:23,145 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 893 transitions. [2022-11-03 03:29:23,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 893 transitions. [2022-11-03 03:29:23,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 03:29:23,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:23,149 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:29:23,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:23,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:23,367 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:23,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:23,368 INFO L85 PathProgramCache]: Analyzing trace with hash -2053443708, now seen corresponding path program 1 times [2022-11-03 03:29:23,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:23,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764605341] [2022-11-03 03:29:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:23,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:23,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:23,370 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:23,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:29:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:23,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:29:23,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:29:23,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:23,725 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:23,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764605341] [2022-11-03 03:29:23,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764605341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:23,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:23,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:23,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997684008] [2022-11-03 03:29:23,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:23,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:23,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:23,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:23,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:23,728 INFO L87 Difference]: Start difference. First operand 545 states and 893 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:23,934 INFO L93 Difference]: Finished difference Result 1098 states and 1814 transitions. [2022-11-03 03:29:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:29:23,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 107 [2022-11-03 03:29:23,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:23,946 INFO L225 Difference]: With dead ends: 1098 [2022-11-03 03:29:23,946 INFO L226 Difference]: Without dead ends: 559 [2022-11-03 03:29:23,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:23,950 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 114 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 2423 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:23,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 2423 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:29:23,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-11-03 03:29:23,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 550. [2022-11-03 03:29:23,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 432 states have (on average 1.6435185185185186) internal successors, (710), 447 states have internal predecessors, (710), 93 states have call successors, (93), 25 states have call predecessors, (93), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-03 03:29:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 895 transitions. [2022-11-03 03:29:23,975 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 895 transitions. Word has length 107 [2022-11-03 03:29:23,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:23,975 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 895 transitions. [2022-11-03 03:29:23,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:23,976 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 895 transitions. [2022-11-03 03:29:23,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 03:29:23,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:23,979 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:29:24,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:24,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:24,198 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:24,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:24,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1053588122, now seen corresponding path program 1 times [2022-11-03 03:29:24,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:24,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055717320] [2022-11-03 03:29:24,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:24,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:24,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:24,201 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:24,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:29:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:24,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:29:24,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:29:24,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:24,539 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:24,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055717320] [2022-11-03 03:29:24,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055717320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:24,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:24,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:24,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611272491] [2022-11-03 03:29:24,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:24,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:24,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:24,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:24,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:24,541 INFO L87 Difference]: Start difference. First operand 550 states and 895 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:24,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:24,718 INFO L93 Difference]: Finished difference Result 1049 states and 1710 transitions. [2022-11-03 03:29:24,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:24,720 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 108 [2022-11-03 03:29:24,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:24,724 INFO L225 Difference]: With dead ends: 1049 [2022-11-03 03:29:24,724 INFO L226 Difference]: Without dead ends: 550 [2022-11-03 03:29:24,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:24,730 INFO L413 NwaCegarLoop]: 827 mSDtfsCounter, 78 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2426 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:24,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 2426 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-11-03 03:29:24,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2022-11-03 03:29:24,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 432 states have (on average 1.6342592592592593) internal successors, (706), 447 states have internal predecessors, (706), 93 states have call successors, (93), 25 states have call predecessors, (93), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-03 03:29:24,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 891 transitions. [2022-11-03 03:29:24,754 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 891 transitions. Word has length 108 [2022-11-03 03:29:24,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:24,755 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 891 transitions. [2022-11-03 03:29:24,755 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:24,755 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 891 transitions. [2022-11-03 03:29:24,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 03:29:24,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:24,760 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:29:24,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:24,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:24,978 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:24,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:24,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1041820809, now seen corresponding path program 1 times [2022-11-03 03:29:24,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:24,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817090021] [2022-11-03 03:29:24,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:24,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:24,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:24,981 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:24,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:29:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:25,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:29:25,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:29:25,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:25,313 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:25,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817090021] [2022-11-03 03:29:25,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817090021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:25,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:25,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:25,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500649765] [2022-11-03 03:29:25,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:25,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:25,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:25,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:25,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:25,315 INFO L87 Difference]: Start difference. First operand 550 states and 891 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:25,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:25,467 INFO L93 Difference]: Finished difference Result 1049 states and 1706 transitions. [2022-11-03 03:29:25,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:25,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 109 [2022-11-03 03:29:25,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:25,472 INFO L225 Difference]: With dead ends: 1049 [2022-11-03 03:29:25,472 INFO L226 Difference]: Without dead ends: 550 [2022-11-03 03:29:25,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:25,476 INFO L413 NwaCegarLoop]: 827 mSDtfsCounter, 73 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 2426 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:25,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 2426 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:25,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-11-03 03:29:25,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2022-11-03 03:29:25,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 432 states have (on average 1.625) internal successors, (702), 447 states have internal predecessors, (702), 93 states have call successors, (93), 25 states have call predecessors, (93), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-03 03:29:25,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 887 transitions. [2022-11-03 03:29:25,497 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 887 transitions. Word has length 109 [2022-11-03 03:29:25,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:25,497 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 887 transitions. [2022-11-03 03:29:25,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:25,498 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 887 transitions. [2022-11-03 03:29:25,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 03:29:25,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:25,501 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:29:25,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:25,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:25,719 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:25,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1464940279, now seen corresponding path program 1 times [2022-11-03 03:29:25,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:25,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872356189] [2022-11-03 03:29:25,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:25,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:25,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:25,721 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:25,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:29:26,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:26,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:29:26,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:29:26,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:26,188 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:26,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872356189] [2022-11-03 03:29:26,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872356189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:26,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:26,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:29:26,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663805468] [2022-11-03 03:29:26,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:26,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:29:26,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:26,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:29:26,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:29:26,190 INFO L87 Difference]: Start difference. First operand 550 states and 887 transitions. Second operand has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:29:26,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:26,359 INFO L93 Difference]: Finished difference Result 1058 states and 1716 transitions. [2022-11-03 03:29:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:29:26,361 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 109 [2022-11-03 03:29:26,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:26,365 INFO L225 Difference]: With dead ends: 1058 [2022-11-03 03:29:26,365 INFO L226 Difference]: Without dead ends: 538 [2022-11-03 03:29:26,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:26,369 INFO L413 NwaCegarLoop]: 856 mSDtfsCounter, 107 mSDsluCounter, 4156 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 5012 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:26,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 5012 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-11-03 03:29:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 529. [2022-11-03 03:29:26,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 411 states have (on average 1.6180048661800486) internal successors, (665), 426 states have internal predecessors, (665), 93 states have call successors, (93), 25 states have call predecessors, (93), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-03 03:29:26,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 850 transitions. [2022-11-03 03:29:26,390 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 850 transitions. Word has length 109 [2022-11-03 03:29:26,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:26,390 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 850 transitions. [2022-11-03 03:29:26,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:29:26,391 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 850 transitions. [2022-11-03 03:29:26,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 03:29:26,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:26,395 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:26,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:26,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:26,619 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:26,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:26,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1555322229, now seen corresponding path program 1 times [2022-11-03 03:29:26,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:26,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153414986] [2022-11-03 03:29:26,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:26,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:26,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:26,622 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:26,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:29:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:26,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:29:26,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:26,962 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:29:26,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:26,962 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:26,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153414986] [2022-11-03 03:29:26,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153414986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:26,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:26,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:26,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287518133] [2022-11-03 03:29:26,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:26,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:26,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:26,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:26,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:26,965 INFO L87 Difference]: Start difference. First operand 529 states and 850 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:27,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:27,072 INFO L93 Difference]: Finished difference Result 1028 states and 1665 transitions. [2022-11-03 03:29:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:27,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 110 [2022-11-03 03:29:27,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:27,079 INFO L225 Difference]: With dead ends: 1028 [2022-11-03 03:29:27,079 INFO L226 Difference]: Without dead ends: 529 [2022-11-03 03:29:27,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:27,084 INFO L413 NwaCegarLoop]: 827 mSDtfsCounter, 41 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2426 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:27,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 2426 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:27,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-11-03 03:29:27,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2022-11-03 03:29:27,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 411 states have (on average 1.6155717761557178) internal successors, (664), 426 states have internal predecessors, (664), 93 states have call successors, (93), 25 states have call predecessors, (93), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-03 03:29:27,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 849 transitions. [2022-11-03 03:29:27,124 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 849 transitions. Word has length 110 [2022-11-03 03:29:27,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:27,125 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 849 transitions. [2022-11-03 03:29:27,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:27,126 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 849 transitions. [2022-11-03 03:29:27,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 03:29:27,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:27,130 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:29:27,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:27,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:27,343 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:27,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:27,343 INFO L85 PathProgramCache]: Analyzing trace with hash 702279054, now seen corresponding path program 1 times [2022-11-03 03:29:27,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:27,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089315249] [2022-11-03 03:29:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:27,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:27,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:27,345 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:27,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:29:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:27,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:29:27,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:29:27,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:27,727 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:27,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089315249] [2022-11-03 03:29:27,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089315249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:27,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:27,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:27,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702855015] [2022-11-03 03:29:27,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:27,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:27,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:27,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:27,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:27,730 INFO L87 Difference]: Start difference. First operand 529 states and 849 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:27,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:27,834 INFO L93 Difference]: Finished difference Result 1028 states and 1664 transitions. [2022-11-03 03:29:27,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:27,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 111 [2022-11-03 03:29:27,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:27,840 INFO L225 Difference]: With dead ends: 1028 [2022-11-03 03:29:27,840 INFO L226 Difference]: Without dead ends: 529 [2022-11-03 03:29:27,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:27,845 INFO L413 NwaCegarLoop]: 827 mSDtfsCounter, 39 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2426 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:27,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 2426 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:27,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-11-03 03:29:27,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2022-11-03 03:29:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 411 states have (on average 1.6131386861313868) internal successors, (663), 426 states have internal predecessors, (663), 93 states have call successors, (93), 25 states have call predecessors, (93), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-03 03:29:27,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 848 transitions. [2022-11-03 03:29:27,867 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 848 transitions. Word has length 111 [2022-11-03 03:29:27,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:27,867 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 848 transitions. [2022-11-03 03:29:27,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 03:29:27,868 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 848 transitions. [2022-11-03 03:29:27,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 03:29:27,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:27,872 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:27,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:28,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:28,087 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:28,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:28,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1161868368, now seen corresponding path program 1 times [2022-11-03 03:29:28,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:28,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409262874] [2022-11-03 03:29:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:28,089 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:28,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:28,090 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:28,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 03:29:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:28,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:29:28,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:29:28,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:28,503 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:28,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409262874] [2022-11-03 03:29:28,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409262874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:28,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:28,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:29:28,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497351424] [2022-11-03 03:29:28,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:28,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:29:28,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:28,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:29:28,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:28,506 INFO L87 Difference]: Start difference. First operand 529 states and 848 transitions. Second operand has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:29:28,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:28,752 INFO L93 Difference]: Finished difference Result 1027 states and 1660 transitions. [2022-11-03 03:29:28,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:29:28,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2022-11-03 03:29:28,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:28,757 INFO L225 Difference]: With dead ends: 1027 [2022-11-03 03:29:28,757 INFO L226 Difference]: Without dead ends: 534 [2022-11-03 03:29:28,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:29:28,762 INFO L413 NwaCegarLoop]: 805 mSDtfsCounter, 46 mSDsluCounter, 4794 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 5599 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:28,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 5599 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:29:28,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-11-03 03:29:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 531. [2022-11-03 03:29:28,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 413 states have (on average 1.6077481840193704) internal successors, (664), 428 states have internal predecessors, (664), 93 states have call successors, (93), 25 states have call predecessors, (93), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-03 03:29:28,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 849 transitions. [2022-11-03 03:29:28,787 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 849 transitions. Word has length 112 [2022-11-03 03:29:28,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:28,787 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 849 transitions. [2022-11-03 03:29:28,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:29:28,788 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 849 transitions. [2022-11-03 03:29:28,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 03:29:28,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:28,792 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:28,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:29,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:29,009 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:29,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:29,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1052870499, now seen corresponding path program 1 times [2022-11-03 03:29:29,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:29,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537298365] [2022-11-03 03:29:29,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:29,011 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:29,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:29,012 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:29,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 03:29:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:29,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:29:29,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:29:29,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:29,453 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:29,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537298365] [2022-11-03 03:29:29,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537298365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:29,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:29,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:29,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874759200] [2022-11-03 03:29:29,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:29,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:29,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:29,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:29,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:29,457 INFO L87 Difference]: Start difference. First operand 531 states and 849 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:29:30,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:30,428 INFO L93 Difference]: Finished difference Result 1023 states and 1678 transitions. [2022-11-03 03:29:30,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:30,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 113 [2022-11-03 03:29:30,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:30,434 INFO L225 Difference]: With dead ends: 1023 [2022-11-03 03:29:30,434 INFO L226 Difference]: Without dead ends: 535 [2022-11-03 03:29:30,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:29:30,441 INFO L413 NwaCegarLoop]: 797 mSDtfsCounter, 766 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:30,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 2050 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 03:29:30,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-11-03 03:29:30,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2022-11-03 03:29:30,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 416 states have (on average 1.6033653846153846) internal successors, (667), 431 states have internal predecessors, (667), 93 states have call successors, (93), 26 states have call predecessors, (93), 25 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2022-11-03 03:29:30,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 853 transitions. [2022-11-03 03:29:30,493 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 853 transitions. Word has length 113 [2022-11-03 03:29:30,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:30,494 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 853 transitions. [2022-11-03 03:29:30,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:29:30,494 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 853 transitions. [2022-11-03 03:29:30,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 03:29:30,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:30,498 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:30,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:30,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:30,716 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:30,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:30,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1995321546, now seen corresponding path program 1 times [2022-11-03 03:29:30,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:30,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774385831] [2022-11-03 03:29:30,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:30,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:30,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:30,718 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:30,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:29:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:31,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:29:31,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 03:29:31,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:31,247 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:31,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774385831] [2022-11-03 03:29:31,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774385831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:31,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:31,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:31,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015244239] [2022-11-03 03:29:31,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:31,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:31,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:31,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:31,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:31,250 INFO L87 Difference]: Start difference. First operand 535 states and 853 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:29:32,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:32,211 INFO L93 Difference]: Finished difference Result 1032 states and 1685 transitions. [2022-11-03 03:29:32,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:32,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 116 [2022-11-03 03:29:32,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:32,217 INFO L225 Difference]: With dead ends: 1032 [2022-11-03 03:29:32,217 INFO L226 Difference]: Without dead ends: 540 [2022-11-03 03:29:32,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:29:32,222 INFO L413 NwaCegarLoop]: 798 mSDtfsCounter, 779 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 2051 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:32,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 2051 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 03:29:32,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-11-03 03:29:32,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2022-11-03 03:29:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 420 states have (on average 1.5976190476190477) internal successors, (671), 435 states have internal predecessors, (671), 93 states have call successors, (93), 27 states have call predecessors, (93), 26 states have return successors, (94), 90 states have call predecessors, (94), 92 states have call successors, (94) [2022-11-03 03:29:32,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 858 transitions. [2022-11-03 03:29:32,257 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 858 transitions. Word has length 116 [2022-11-03 03:29:32,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:32,258 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 858 transitions. [2022-11-03 03:29:32,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:29:32,258 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 858 transitions. [2022-11-03 03:29:32,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-03 03:29:32,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:32,262 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:32,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:32,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:32,480 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:32,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:32,480 INFO L85 PathProgramCache]: Analyzing trace with hash -44289537, now seen corresponding path program 1 times [2022-11-03 03:29:32,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:32,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675357542] [2022-11-03 03:29:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:32,481 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:32,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:32,483 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:32,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 03:29:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:32,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:29:32,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:29:32,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:32,940 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:32,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675357542] [2022-11-03 03:29:32,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675357542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:32,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:32,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:32,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843042770] [2022-11-03 03:29:32,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:32,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:32,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:32,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:32,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:32,941 INFO L87 Difference]: Start difference. First operand 540 states and 858 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:29:33,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:33,855 INFO L93 Difference]: Finished difference Result 1043 states and 1694 transitions. [2022-11-03 03:29:33,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:33,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 119 [2022-11-03 03:29:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:33,860 INFO L225 Difference]: With dead ends: 1043 [2022-11-03 03:29:33,860 INFO L226 Difference]: Without dead ends: 546 [2022-11-03 03:29:33,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:29:33,864 INFO L413 NwaCegarLoop]: 798 mSDtfsCounter, 779 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 2051 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:33,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 2051 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:29:33,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-11-03 03:29:33,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2022-11-03 03:29:33,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 425 states have (on average 1.5905882352941176) internal successors, (676), 440 states have internal predecessors, (676), 93 states have call successors, (93), 28 states have call predecessors, (93), 27 states have return successors, (95), 90 states have call predecessors, (95), 92 states have call successors, (95) [2022-11-03 03:29:33,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 864 transitions. [2022-11-03 03:29:33,892 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 864 transitions. Word has length 119 [2022-11-03 03:29:33,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:33,892 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 864 transitions. [2022-11-03 03:29:33,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:29:33,893 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 864 transitions. [2022-11-03 03:29:33,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 03:29:33,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:33,896 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:33,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:34,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:34,112 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:34,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:34,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1944870282, now seen corresponding path program 1 times [2022-11-03 03:29:34,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:34,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468645573] [2022-11-03 03:29:34,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:34,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:34,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:34,115 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:34,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 03:29:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:34,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:29:34,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:29:34,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:34,638 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:34,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468645573] [2022-11-03 03:29:34,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468645573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:34,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:34,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:34,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818056932] [2022-11-03 03:29:34,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:34,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:34,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:34,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:34,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:34,641 INFO L87 Difference]: Start difference. First operand 546 states and 864 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:29:35,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:35,517 INFO L93 Difference]: Finished difference Result 1056 states and 1705 transitions. [2022-11-03 03:29:35,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:35,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 122 [2022-11-03 03:29:35,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:35,522 INFO L225 Difference]: With dead ends: 1056 [2022-11-03 03:29:35,522 INFO L226 Difference]: Without dead ends: 553 [2022-11-03 03:29:35,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:29:35,525 INFO L413 NwaCegarLoop]: 798 mSDtfsCounter, 776 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 2051 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:35,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 2051 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:29:35,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-11-03 03:29:35,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2022-11-03 03:29:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 431 states have (on average 1.5823665893271461) internal successors, (682), 446 states have internal predecessors, (682), 93 states have call successors, (93), 29 states have call predecessors, (93), 28 states have return successors, (96), 90 states have call predecessors, (96), 92 states have call successors, (96) [2022-11-03 03:29:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 871 transitions. [2022-11-03 03:29:35,558 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 871 transitions. Word has length 122 [2022-11-03 03:29:35,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:35,558 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 871 transitions. [2022-11-03 03:29:35,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:29:35,558 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 871 transitions. [2022-11-03 03:29:35,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 03:29:35,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:35,562 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:35,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:35,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:35,788 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:35,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:35,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1449268891, now seen corresponding path program 1 times [2022-11-03 03:29:35,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:35,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031218746] [2022-11-03 03:29:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:35,789 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:35,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:35,790 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:35,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 03:29:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:36,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:29:36,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:29:36,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:36,312 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:36,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031218746] [2022-11-03 03:29:36,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031218746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:36,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:36,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:29:36,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450882135] [2022-11-03 03:29:36,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:36,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:29:36,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:36,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:29:36,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:29:36,315 INFO L87 Difference]: Start difference. First operand 553 states and 871 transitions. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 03:29:42,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:42,910 INFO L93 Difference]: Finished difference Result 1869 states and 3022 transitions. [2022-11-03 03:29:42,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:29:42,911 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 125 [2022-11-03 03:29:42,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:42,920 INFO L225 Difference]: With dead ends: 1869 [2022-11-03 03:29:42,921 INFO L226 Difference]: Without dead ends: 1359 [2022-11-03 03:29:42,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:29:42,925 INFO L413 NwaCegarLoop]: 1452 mSDtfsCounter, 1650 mSDsluCounter, 2808 mSDsCounter, 0 mSdLazyCounter, 4940 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1754 SdHoareTripleChecker+Valid, 4260 SdHoareTripleChecker+Invalid, 5564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 4940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:42,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1754 Valid, 4260 Invalid, 5564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 4940 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-11-03 03:29:42,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2022-11-03 03:29:43,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1137. [2022-11-03 03:29:43,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 864 states have (on average 1.5856481481481481) internal successors, (1370), 901 states have internal predecessors, (1370), 212 states have call successors, (212), 55 states have call predecessors, (212), 60 states have return successors, (237), 211 states have call predecessors, (237), 210 states have call successors, (237) [2022-11-03 03:29:43,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1819 transitions. [2022-11-03 03:29:43,020 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1819 transitions. Word has length 125 [2022-11-03 03:29:43,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:43,020 INFO L495 AbstractCegarLoop]: Abstraction has 1137 states and 1819 transitions. [2022-11-03 03:29:43,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 03:29:43,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1819 transitions. [2022-11-03 03:29:43,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-03 03:29:43,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:43,027 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:43,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:43,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:43,244 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:43,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:43,245 INFO L85 PathProgramCache]: Analyzing trace with hash 442512690, now seen corresponding path program 1 times [2022-11-03 03:29:43,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:43,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056358573] [2022-11-03 03:29:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:43,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:43,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:43,247 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:43,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 03:29:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:43,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:29:43,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 03:29:43,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:43,649 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:43,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056358573] [2022-11-03 03:29:43,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056358573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:43,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:43,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:29:43,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040344373] [2022-11-03 03:29:43,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:43,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:29:43,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:43,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:29:43,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:43,652 INFO L87 Difference]: Start difference. First operand 1137 states and 1819 transitions. Second operand has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:29:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:43,938 INFO L93 Difference]: Finished difference Result 2201 states and 3544 transitions. [2022-11-03 03:29:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:29:43,939 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 128 [2022-11-03 03:29:43,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:43,946 INFO L225 Difference]: With dead ends: 2201 [2022-11-03 03:29:43,946 INFO L226 Difference]: Without dead ends: 1097 [2022-11-03 03:29:43,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:29:43,953 INFO L413 NwaCegarLoop]: 805 mSDtfsCounter, 58 mSDsluCounter, 4791 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 5596 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:43,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 5596 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:29:43,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-11-03 03:29:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1094. [2022-11-03 03:29:44,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 832 states have (on average 1.5925480769230769) internal successors, (1325), 868 states have internal predecessors, (1325), 206 states have call successors, (206), 52 states have call predecessors, (206), 55 states have return successors, (224), 204 states have call predecessors, (224), 204 states have call successors, (224) [2022-11-03 03:29:44,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1755 transitions. [2022-11-03 03:29:44,026 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1755 transitions. Word has length 128 [2022-11-03 03:29:44,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:44,027 INFO L495 AbstractCegarLoop]: Abstraction has 1094 states and 1755 transitions. [2022-11-03 03:29:44,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:29:44,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1755 transitions. [2022-11-03 03:29:44,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 03:29:44,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:44,031 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:44,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:44,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:44,248 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:44,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:44,248 INFO L85 PathProgramCache]: Analyzing trace with hash -467176545, now seen corresponding path program 1 times [2022-11-03 03:29:44,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:44,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076773626] [2022-11-03 03:29:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:44,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:44,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:44,249 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:44,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 03:29:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:44,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:29:44,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:29:44,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:44,757 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:44,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076773626] [2022-11-03 03:29:44,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076773626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:44,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:44,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:29:44,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970768912] [2022-11-03 03:29:44,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:44,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:29:44,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:44,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:29:44,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:29:44,760 INFO L87 Difference]: Start difference. First operand 1094 states and 1755 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:29:48,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:48,951 INFO L93 Difference]: Finished difference Result 2738 states and 4442 transitions. [2022-11-03 03:29:48,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:29:48,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 131 [2022-11-03 03:29:48,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:48,962 INFO L225 Difference]: With dead ends: 2738 [2022-11-03 03:29:48,962 INFO L226 Difference]: Without dead ends: 1684 [2022-11-03 03:29:48,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:29:48,969 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 1967 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 2692 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2069 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 3188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 2692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:48,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2069 Valid, 1895 Invalid, 3188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 2692 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-03 03:29:48,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2022-11-03 03:29:49,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1643. [2022-11-03 03:29:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1239 states have (on average 1.5956416464891041) internal successors, (1977), 1296 states have internal predecessors, (1977), 319 states have call successors, (319), 75 states have call predecessors, (319), 84 states have return successors, (362), 320 states have call predecessors, (362), 316 states have call successors, (362) [2022-11-03 03:29:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2658 transitions. [2022-11-03 03:29:49,121 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2658 transitions. Word has length 131 [2022-11-03 03:29:49,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:49,121 INFO L495 AbstractCegarLoop]: Abstraction has 1643 states and 2658 transitions. [2022-11-03 03:29:49,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:29:49,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2658 transitions. [2022-11-03 03:29:49,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 03:29:49,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:49,125 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:49,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-03 03:29:49,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:49,341 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:49,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:49,341 INFO L85 PathProgramCache]: Analyzing trace with hash 2012855590, now seen corresponding path program 1 times [2022-11-03 03:29:49,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:49,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856114689] [2022-11-03 03:29:49,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:49,342 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:49,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:49,344 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:49,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 03:29:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:49,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:29:49,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:29:49,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:49,783 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:49,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856114689] [2022-11-03 03:29:49,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856114689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:49,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:49,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:49,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394542386] [2022-11-03 03:29:49,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:49,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:49,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:49,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:49,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:49,786 INFO L87 Difference]: Start difference. First operand 1643 states and 2658 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 03:29:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:50,866 INFO L93 Difference]: Finished difference Result 4707 states and 7681 transitions. [2022-11-03 03:29:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:50,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 132 [2022-11-03 03:29:50,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:50,888 INFO L225 Difference]: With dead ends: 4707 [2022-11-03 03:29:50,889 INFO L226 Difference]: Without dead ends: 3104 [2022-11-03 03:29:50,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:29:50,898 INFO L413 NwaCegarLoop]: 960 mSDtfsCounter, 675 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 2729 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:50,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 2729 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:29:50,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2022-11-03 03:29:51,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 3089. [2022-11-03 03:29:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3089 states, 2312 states have (on average 1.573961937716263) internal successors, (3639), 2422 states have internal predecessors, (3639), 616 states have call successors, (616), 150 states have call predecessors, (616), 160 states have return successors, (695), 611 states have call predecessors, (695), 610 states have call successors, (695) [2022-11-03 03:29:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3089 states to 3089 states and 4950 transitions. [2022-11-03 03:29:51,173 INFO L78 Accepts]: Start accepts. Automaton has 3089 states and 4950 transitions. Word has length 132 [2022-11-03 03:29:51,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:51,173 INFO L495 AbstractCegarLoop]: Abstraction has 3089 states and 4950 transitions. [2022-11-03 03:29:51,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 03:29:51,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3089 states and 4950 transitions. [2022-11-03 03:29:51,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 03:29:51,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:51,177 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:51,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:51,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:51,394 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:51,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:51,395 INFO L85 PathProgramCache]: Analyzing trace with hash 2003536712, now seen corresponding path program 1 times [2022-11-03 03:29:51,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:51,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903423675] [2022-11-03 03:29:51,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:51,395 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:51,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:51,397 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:51,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 03:29:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:51,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:29:51,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:29:51,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:51,868 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:51,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903423675] [2022-11-03 03:29:51,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903423675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:51,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:51,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:51,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649795097] [2022-11-03 03:29:51,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:51,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:51,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:51,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:51,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:51,871 INFO L87 Difference]: Start difference. First operand 3089 states and 4950 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 03:29:53,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:53,095 INFO L93 Difference]: Finished difference Result 9126 states and 14839 transitions. [2022-11-03 03:29:53,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:53,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 134 [2022-11-03 03:29:53,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:53,138 INFO L225 Difference]: With dead ends: 9126 [2022-11-03 03:29:53,138 INFO L226 Difference]: Without dead ends: 6077 [2022-11-03 03:29:53,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:29:53,159 INFO L413 NwaCegarLoop]: 999 mSDtfsCounter, 774 mSDsluCounter, 2351 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 3350 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:53,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 3350 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:29:53,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2022-11-03 03:29:53,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 6051. [2022-11-03 03:29:53,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6051 states, 4530 states have (on average 1.5719646799116997) internal successors, (7121), 4749 states have internal predecessors, (7121), 1203 states have call successors, (1203), 297 states have call predecessors, (1203), 317 states have return successors, (1508), 1194 states have call predecessors, (1508), 1191 states have call successors, (1508) [2022-11-03 03:29:53,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6051 states to 6051 states and 9832 transitions. [2022-11-03 03:29:53,694 INFO L78 Accepts]: Start accepts. Automaton has 6051 states and 9832 transitions. Word has length 134 [2022-11-03 03:29:53,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:53,695 INFO L495 AbstractCegarLoop]: Abstraction has 6051 states and 9832 transitions. [2022-11-03 03:29:53,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 03:29:53,696 INFO L276 IsEmpty]: Start isEmpty. Operand 6051 states and 9832 transitions. [2022-11-03 03:29:53,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 03:29:53,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:53,699 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:53,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:53,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:53,917 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:53,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:53,917 INFO L85 PathProgramCache]: Analyzing trace with hash -509930649, now seen corresponding path program 1 times [2022-11-03 03:29:53,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:53,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101862993] [2022-11-03 03:29:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:53,917 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:53,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:53,918 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:53,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 03:29:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:54,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:29:54,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:29:54,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:54,420 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:54,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101862993] [2022-11-03 03:29:54,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101862993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:54,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:54,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:29:54,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757706853] [2022-11-03 03:29:54,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:54,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:29:54,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:54,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:29:54,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:29:54,422 INFO L87 Difference]: Start difference. First operand 6051 states and 9832 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:29:56,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:56,263 INFO L93 Difference]: Finished difference Result 13693 states and 22258 transitions. [2022-11-03 03:29:56,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:56,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 134 [2022-11-03 03:29:56,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:56,338 INFO L225 Difference]: With dead ends: 13693 [2022-11-03 03:29:56,338 INFO L226 Difference]: Without dead ends: 9866 [2022-11-03 03:29:56,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:56,358 INFO L413 NwaCegarLoop]: 895 mSDtfsCounter, 936 mSDsluCounter, 2927 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 3822 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:56,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [939 Valid, 3822 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 03:29:56,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9866 states. [2022-11-03 03:29:57,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9866 to 9774. [2022-11-03 03:29:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9774 states, 7363 states have (on average 1.5649870976504143) internal successors, (11523), 7703 states have internal predecessors, (11523), 1862 states have call successors, (1862), 489 states have call predecessors, (1862), 548 states have return successors, (2452), 1869 states have call predecessors, (2452), 1844 states have call successors, (2452) [2022-11-03 03:29:57,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9774 states to 9774 states and 15837 transitions. [2022-11-03 03:29:57,444 INFO L78 Accepts]: Start accepts. Automaton has 9774 states and 15837 transitions. Word has length 134 [2022-11-03 03:29:57,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:57,444 INFO L495 AbstractCegarLoop]: Abstraction has 9774 states and 15837 transitions. [2022-11-03 03:29:57,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:29:57,445 INFO L276 IsEmpty]: Start isEmpty. Operand 9774 states and 15837 transitions. [2022-11-03 03:29:57,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 03:29:57,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:57,448 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:57,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:57,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:29:57,663 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:57,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:57,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1126143401, now seen corresponding path program 1 times [2022-11-03 03:29:57,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:29:57,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783620973] [2022-11-03 03:29:57,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:57,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:29:57,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:29:57,666 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:29:57,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 03:29:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:57,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:29:57,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:29:58,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:58,346 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:29:58,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783620973] [2022-11-03 03:29:58,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [783620973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:58,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:58,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:29:58,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916969789] [2022-11-03 03:29:58,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:58,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:29:58,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:29:58,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:29:58,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:29:58,348 INFO L87 Difference]: Start difference. First operand 9774 states and 15837 transitions. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 03:30:04,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:04,078 INFO L93 Difference]: Finished difference Result 17236 states and 27969 transitions. [2022-11-03 03:30:04,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 03:30:04,079 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 136 [2022-11-03 03:30:04,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:04,136 INFO L225 Difference]: With dead ends: 17236 [2022-11-03 03:30:04,137 INFO L226 Difference]: Without dead ends: 9880 [2022-11-03 03:30:04,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:30:04,169 INFO L413 NwaCegarLoop]: 788 mSDtfsCounter, 1887 mSDsluCounter, 1783 mSDsCounter, 0 mSdLazyCounter, 4061 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1991 SdHoareTripleChecker+Valid, 2571 SdHoareTripleChecker+Invalid, 4532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 4061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:04,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1991 Valid, 2571 Invalid, 4532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 4061 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-03 03:30:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9880 states. [2022-11-03 03:30:05,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9880 to 9726. [2022-11-03 03:30:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9726 states, 7337 states have (on average 1.5648085048384899) internal successors, (11481), 7675 states have internal predecessors, (11481), 1846 states have call successors, (1846), 485 states have call predecessors, (1846), 542 states have return successors, (2432), 1853 states have call predecessors, (2432), 1828 states have call successors, (2432) [2022-11-03 03:30:05,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9726 states to 9726 states and 15759 transitions. [2022-11-03 03:30:05,206 INFO L78 Accepts]: Start accepts. Automaton has 9726 states and 15759 transitions. Word has length 136 [2022-11-03 03:30:05,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:05,207 INFO L495 AbstractCegarLoop]: Abstraction has 9726 states and 15759 transitions. [2022-11-03 03:30:05,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 03:30:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 9726 states and 15759 transitions. [2022-11-03 03:30:05,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-03 03:30:05,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:05,212 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:05,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:05,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:05,428 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:05,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:05,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2013018717, now seen corresponding path program 1 times [2022-11-03 03:30:05,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:05,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771222038] [2022-11-03 03:30:05,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:05,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:05,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:05,431 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:05,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 03:30:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:05,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:30:05,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:30:06,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:06,023 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:06,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771222038] [2022-11-03 03:30:06,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771222038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:06,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:06,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:30:06,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905259917] [2022-11-03 03:30:06,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:06,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:30:06,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:06,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:30:06,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:30:06,025 INFO L87 Difference]: Start difference. First operand 9726 states and 15759 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:30:08,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:08,050 INFO L93 Difference]: Finished difference Result 17252 states and 27881 transitions. [2022-11-03 03:30:08,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:30:08,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 139 [2022-11-03 03:30:08,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:08,106 INFO L225 Difference]: With dead ends: 17252 [2022-11-03 03:30:08,106 INFO L226 Difference]: Without dead ends: 9774 [2022-11-03 03:30:08,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:30:08,140 INFO L413 NwaCegarLoop]: 978 mSDtfsCounter, 635 mSDsluCounter, 2560 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 3538 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:08,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 3538 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 03:30:08,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9774 states. [2022-11-03 03:30:08,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9774 to 9744. [2022-11-03 03:30:08,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9744 states, 7349 states have (on average 1.5622533678051436) internal successors, (11481), 7693 states have internal predecessors, (11481), 1846 states have call successors, (1846), 485 states have call predecessors, (1846), 548 states have return successors, (2438), 1853 states have call predecessors, (2438), 1828 states have call successors, (2438) [2022-11-03 03:30:08,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9744 states to 9744 states and 15765 transitions. [2022-11-03 03:30:08,971 INFO L78 Accepts]: Start accepts. Automaton has 9744 states and 15765 transitions. Word has length 139 [2022-11-03 03:30:08,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:08,971 INFO L495 AbstractCegarLoop]: Abstraction has 9744 states and 15765 transitions. [2022-11-03 03:30:08,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:30:08,972 INFO L276 IsEmpty]: Start isEmpty. Operand 9744 states and 15765 transitions. [2022-11-03 03:30:08,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 03:30:08,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:08,975 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:08,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:09,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:09,193 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:09,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:09,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2077570252, now seen corresponding path program 1 times [2022-11-03 03:30:09,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:09,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799239710] [2022-11-03 03:30:09,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:09,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:09,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:09,195 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:09,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 03:30:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:09,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:30:09,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:30:09,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:09,570 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:09,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799239710] [2022-11-03 03:30:09,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799239710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:09,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:09,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:30:09,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189277989] [2022-11-03 03:30:09,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:09,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:30:09,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:09,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:30:09,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:09,573 INFO L87 Difference]: Start difference. First operand 9744 states and 15765 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 03:30:10,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:10,877 INFO L93 Difference]: Finished difference Result 18112 states and 29517 transitions. [2022-11-03 03:30:10,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:30:10,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 146 [2022-11-03 03:30:10,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:10,948 INFO L225 Difference]: With dead ends: 18112 [2022-11-03 03:30:10,948 INFO L226 Difference]: Without dead ends: 9758 [2022-11-03 03:30:11,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:30:11,008 INFO L413 NwaCegarLoop]: 860 mSDtfsCounter, 404 mSDsluCounter, 2127 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 2987 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:11,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 2987 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:30:11,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9758 states. [2022-11-03 03:30:11,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9758 to 9746. [2022-11-03 03:30:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9746 states, 7350 states have (on average 1.5393197278911566) internal successors, (11314), 7695 states have internal predecessors, (11314), 1846 states have call successors, (1846), 485 states have call predecessors, (1846), 549 states have return successors, (2440), 1853 states have call predecessors, (2440), 1828 states have call successors, (2440) [2022-11-03 03:30:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9746 states to 9746 states and 15600 transitions. [2022-11-03 03:30:12,064 INFO L78 Accepts]: Start accepts. Automaton has 9746 states and 15600 transitions. Word has length 146 [2022-11-03 03:30:12,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:12,064 INFO L495 AbstractCegarLoop]: Abstraction has 9746 states and 15600 transitions. [2022-11-03 03:30:12,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 03:30:12,065 INFO L276 IsEmpty]: Start isEmpty. Operand 9746 states and 15600 transitions. [2022-11-03 03:30:12,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-03 03:30:12,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:12,068 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:12,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:12,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:12,284 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:12,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:12,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1747941916, now seen corresponding path program 1 times [2022-11-03 03:30:12,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:12,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749530662] [2022-11-03 03:30:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:12,286 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:12,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:12,291 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:12,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 03:30:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:12,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:30:12,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 03:30:12,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:12,873 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:12,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749530662] [2022-11-03 03:30:12,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749530662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:12,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:12,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:30:12,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921268003] [2022-11-03 03:30:12,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:12,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:30:12,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:12,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:30:12,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:12,875 INFO L87 Difference]: Start difference. First operand 9746 states and 15600 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:30:14,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:14,169 INFO L93 Difference]: Finished difference Result 16862 states and 27255 transitions. [2022-11-03 03:30:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:30:14,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 151 [2022-11-03 03:30:14,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:14,233 INFO L225 Difference]: With dead ends: 16862 [2022-11-03 03:30:14,234 INFO L226 Difference]: Without dead ends: 9892 [2022-11-03 03:30:14,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:30:14,271 INFO L413 NwaCegarLoop]: 1047 mSDtfsCounter, 729 mSDsluCounter, 2673 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 3720 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:14,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 3720 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:30:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9892 states. [2022-11-03 03:30:14,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9892 to 9830. [2022-11-03 03:30:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9830 states, 7398 states have (on average 1.5358204920248717) internal successors, (11362), 7767 states have internal predecessors, (11362), 1870 states have call successors, (1870), 497 states have call predecessors, (1870), 561 states have return successors, (2542), 1853 states have call predecessors, (2542), 1852 states have call successors, (2542) [2022-11-03 03:30:15,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9830 states to 9830 states and 15774 transitions. [2022-11-03 03:30:15,108 INFO L78 Accepts]: Start accepts. Automaton has 9830 states and 15774 transitions. Word has length 151 [2022-11-03 03:30:15,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:15,109 INFO L495 AbstractCegarLoop]: Abstraction has 9830 states and 15774 transitions. [2022-11-03 03:30:15,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 03:30:15,109 INFO L276 IsEmpty]: Start isEmpty. Operand 9830 states and 15774 transitions. [2022-11-03 03:30:15,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-03 03:30:15,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:15,116 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:15,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:15,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:15,331 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:15,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:15,331 INFO L85 PathProgramCache]: Analyzing trace with hash -374853964, now seen corresponding path program 1 times [2022-11-03 03:30:15,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:15,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180297609] [2022-11-03 03:30:15,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:15,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:15,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:15,334 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:15,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 03:30:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:15,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:30:15,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 03:30:16,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-03 03:30:16,500 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:16,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180297609] [2022-11-03 03:30:16,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180297609] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:16,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:30:16,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2022-11-03 03:30:16,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337566538] [2022-11-03 03:30:16,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:16,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:30:16,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:16,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:30:16,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:30:16,503 INFO L87 Difference]: Start difference. First operand 9830 states and 15774 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 03:30:21,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:21,478 INFO L93 Difference]: Finished difference Result 19240 states and 31086 transitions. [2022-11-03 03:30:21,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:30:21,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 156 [2022-11-03 03:30:21,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:21,544 INFO L225 Difference]: With dead ends: 19240 [2022-11-03 03:30:21,545 INFO L226 Difference]: Without dead ends: 12184 [2022-11-03 03:30:21,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:30:21,582 INFO L413 NwaCegarLoop]: 935 mSDtfsCounter, 2099 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 2697 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2185 SdHoareTripleChecker+Valid, 2475 SdHoareTripleChecker+Invalid, 3029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 2697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:21,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2185 Valid, 2475 Invalid, 3029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 2697 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-03 03:30:21,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12184 states. [2022-11-03 03:30:22,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12184 to 11464. [2022-11-03 03:30:22,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11464 states, 8695 states have (on average 1.521909143185739) internal successors, (13233), 9089 states have internal predecessors, (13233), 2064 states have call successors, (2064), 621 states have call predecessors, (2064), 704 states have return successors, (2882), 2029 states have call predecessors, (2882), 2046 states have call successors, (2882) [2022-11-03 03:30:22,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11464 states to 11464 states and 18179 transitions. [2022-11-03 03:30:22,757 INFO L78 Accepts]: Start accepts. Automaton has 11464 states and 18179 transitions. Word has length 156 [2022-11-03 03:30:22,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:22,757 INFO L495 AbstractCegarLoop]: Abstraction has 11464 states and 18179 transitions. [2022-11-03 03:30:22,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 03:30:22,758 INFO L276 IsEmpty]: Start isEmpty. Operand 11464 states and 18179 transitions. [2022-11-03 03:30:22,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-03 03:30:22,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:22,760 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:22,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:22,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:22,961 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:22,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:22,962 INFO L85 PathProgramCache]: Analyzing trace with hash 304113656, now seen corresponding path program 1 times [2022-11-03 03:30:22,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:22,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198802310] [2022-11-03 03:30:22,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:22,962 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:22,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:22,963 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:22,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 03:30:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:23,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:30:23,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-03 03:30:23,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:23,602 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:23,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198802310] [2022-11-03 03:30:23,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198802310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:23,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:23,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:30:23,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483443982] [2022-11-03 03:30:23,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:23,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:30:23,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:23,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:30:23,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:30:23,604 INFO L87 Difference]: Start difference. First operand 11464 states and 18179 transitions. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 7 states have internal predecessors, (98), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:30:30,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:30,057 INFO L93 Difference]: Finished difference Result 22822 states and 36539 transitions. [2022-11-03 03:30:30,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:30:30,058 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 7 states have internal predecessors, (98), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) Word has length 156 [2022-11-03 03:30:30,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:30,115 INFO L225 Difference]: With dead ends: 22822 [2022-11-03 03:30:30,115 INFO L226 Difference]: Without dead ends: 6496 [2022-11-03 03:30:30,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:30:30,206 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 1805 mSDsluCounter, 1931 mSDsCounter, 0 mSdLazyCounter, 3814 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1908 SdHoareTripleChecker+Valid, 2709 SdHoareTripleChecker+Invalid, 4275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 3814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:30,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1908 Valid, 2709 Invalid, 4275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 3814 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-03 03:30:30,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6496 states. [2022-11-03 03:30:30,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6496 to 6440. [2022-11-03 03:30:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6440 states, 5007 states have (on average 1.5344517675254643) internal successors, (7683), 5208 states have internal predecessors, (7683), 1030 states have call successors, (1030), 376 states have call predecessors, (1030), 402 states have return successors, (1372), 992 states have call predecessors, (1372), 1024 states have call successors, (1372) [2022-11-03 03:30:30,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6440 states to 6440 states and 10085 transitions. [2022-11-03 03:30:30,891 INFO L78 Accepts]: Start accepts. Automaton has 6440 states and 10085 transitions. Word has length 156 [2022-11-03 03:30:30,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:30,892 INFO L495 AbstractCegarLoop]: Abstraction has 6440 states and 10085 transitions. [2022-11-03 03:30:30,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 7 states have internal predecessors, (98), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 03:30:30,892 INFO L276 IsEmpty]: Start isEmpty. Operand 6440 states and 10085 transitions. [2022-11-03 03:30:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-11-03 03:30:30,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:30,913 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 13, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:30,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:31,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:31,127 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:31,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:31,128 INFO L85 PathProgramCache]: Analyzing trace with hash -922200742, now seen corresponding path program 1 times [2022-11-03 03:30:31,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:31,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845451794] [2022-11-03 03:30:31,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:31,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:31,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:31,129 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:31,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 03:30:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:31,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1752 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:30:31,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 959 trivial. 0 not checked. [2022-11-03 03:30:31,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:31,862 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:31,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845451794] [2022-11-03 03:30:31,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845451794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:31,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:31,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:30:31,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355048143] [2022-11-03 03:30:31,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:31,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:30:31,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:31,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:30:31,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:30:31,865 INFO L87 Difference]: Start difference. First operand 6440 states and 10085 transitions. Second operand has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 5 states have internal predecessors, (181), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-03 03:30:32,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:32,446 INFO L93 Difference]: Finished difference Result 12918 states and 20498 transitions. [2022-11-03 03:30:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:30:32,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 5 states have internal predecessors, (181), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) Word has length 478 [2022-11-03 03:30:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:32,493 INFO L225 Difference]: With dead ends: 12918 [2022-11-03 03:30:32,493 INFO L226 Difference]: Without dead ends: 6875 [2022-11-03 03:30:32,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:30:32,528 INFO L413 NwaCegarLoop]: 831 mSDtfsCounter, 70 mSDsluCounter, 3267 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 4098 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:32,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 4098 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:30:32,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6875 states. [2022-11-03 03:30:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6875 to 6495. [2022-11-03 03:30:33,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6495 states, 5051 states have (on average 1.5297960799841614) internal successors, (7727), 5252 states have internal predecessors, (7727), 1030 states have call successors, (1030), 376 states have call predecessors, (1030), 413 states have return successors, (1389), 1003 states have call predecessors, (1389), 1024 states have call successors, (1389) [2022-11-03 03:30:33,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6495 states to 6495 states and 10146 transitions. [2022-11-03 03:30:33,216 INFO L78 Accepts]: Start accepts. Automaton has 6495 states and 10146 transitions. Word has length 478 [2022-11-03 03:30:33,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:33,216 INFO L495 AbstractCegarLoop]: Abstraction has 6495 states and 10146 transitions. [2022-11-03 03:30:33,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 5 states have internal predecessors, (181), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-03 03:30:33,217 INFO L276 IsEmpty]: Start isEmpty. Operand 6495 states and 10146 transitions. [2022-11-03 03:30:33,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-11-03 03:30:33,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:33,237 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:33,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:33,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:33,438 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:33,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:33,438 INFO L85 PathProgramCache]: Analyzing trace with hash -2113813849, now seen corresponding path program 1 times [2022-11-03 03:30:33,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:33,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277949309] [2022-11-03 03:30:33,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:33,439 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:33,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:33,440 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:33,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 03:30:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:34,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1769 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:30:34,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 398 proven. 0 refuted. 0 times theorem prover too weak. 821 trivial. 0 not checked. [2022-11-03 03:30:34,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:34,558 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:34,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277949309] [2022-11-03 03:30:34,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277949309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:34,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:34,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:30:34,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969508791] [2022-11-03 03:30:34,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:34,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:30:34,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:34,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:30:34,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:30:34,561 INFO L87 Difference]: Start difference. First operand 6495 states and 10146 transitions. Second operand has 7 states, 7 states have (on average 28.142857142857142) internal successors, (197), 7 states have internal predecessors, (197), 6 states have call successors, (38), 5 states have call predecessors, (38), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2022-11-03 03:30:41,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:41,117 INFO L93 Difference]: Finished difference Result 17456 states and 27758 transitions. [2022-11-03 03:30:41,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 03:30:41,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 28.142857142857142) internal successors, (197), 7 states have internal predecessors, (197), 6 states have call successors, (38), 5 states have call predecessors, (38), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 487 [2022-11-03 03:30:41,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:41,180 INFO L225 Difference]: With dead ends: 17456 [2022-11-03 03:30:41,180 INFO L226 Difference]: Without dead ends: 10942 [2022-11-03 03:30:41,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:30:41,218 INFO L413 NwaCegarLoop]: 1340 mSDtfsCounter, 1920 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 4461 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2083 SdHoareTripleChecker+Valid, 2700 SdHoareTripleChecker+Invalid, 4955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 4461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:41,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2083 Valid, 2700 Invalid, 4955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 4461 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-03 03:30:41,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10942 states. [2022-11-03 03:30:41,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10942 to 10485. [2022-11-03 03:30:42,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10485 states, 8066 states have (on average 1.5181006694768162) internal successors, (12245), 8407 states have internal predecessors, (12245), 1705 states have call successors, (1705), 655 states have call predecessors, (1705), 713 states have return successors, (2443), 1641 states have call predecessors, (2443), 1697 states have call successors, (2443) [2022-11-03 03:30:42,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10485 states to 10485 states and 16393 transitions. [2022-11-03 03:30:42,064 INFO L78 Accepts]: Start accepts. Automaton has 10485 states and 16393 transitions. Word has length 487 [2022-11-03 03:30:42,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:42,065 INFO L495 AbstractCegarLoop]: Abstraction has 10485 states and 16393 transitions. [2022-11-03 03:30:42,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 28.142857142857142) internal successors, (197), 7 states have internal predecessors, (197), 6 states have call successors, (38), 5 states have call predecessors, (38), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2022-11-03 03:30:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 10485 states and 16393 transitions. [2022-11-03 03:30:42,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2022-11-03 03:30:42,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:42,096 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 14, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 03:30:42,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-03 03:30:42,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:42,309 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:42,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:42,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1243979483, now seen corresponding path program 1 times [2022-11-03 03:30:42,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:42,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347069472] [2022-11-03 03:30:42,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:42,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:42,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:42,311 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:42,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 03:30:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:42,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:30:42,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1383 backedges. 726 proven. 0 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2022-11-03 03:30:43,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:30:43,026 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:43,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347069472] [2022-11-03 03:30:43,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347069472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:43,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:43,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:30:43,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600305238] [2022-11-03 03:30:43,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:43,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:30:43,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:43,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:30:43,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:30:43,029 INFO L87 Difference]: Start difference. First operand 10485 states and 16393 transitions. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-03 03:30:44,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:44,373 INFO L93 Difference]: Finished difference Result 21676 states and 34293 transitions. [2022-11-03 03:30:44,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:30:44,374 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) Word has length 457 [2022-11-03 03:30:44,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:44,446 INFO L225 Difference]: With dead ends: 21676 [2022-11-03 03:30:44,446 INFO L226 Difference]: Without dead ends: 11440 [2022-11-03 03:30:44,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:30:44,499 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 165 mSDsluCounter, 3378 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 4256 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:44,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 4256 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:30:44,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11440 states. [2022-11-03 03:30:45,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11440 to 10638. [2022-11-03 03:30:45,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10638 states, 8101 states have (on average 1.5173435378348352) internal successors, (12292), 8486 states have internal predecessors, (12292), 1841 states have call successors, (1841), 629 states have call predecessors, (1841), 695 states have return successors, (2575), 1789 states have call predecessors, (2575), 1833 states have call successors, (2575) [2022-11-03 03:30:45,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10638 states to 10638 states and 16708 transitions. [2022-11-03 03:30:45,648 INFO L78 Accepts]: Start accepts. Automaton has 10638 states and 16708 transitions. Word has length 457 [2022-11-03 03:30:45,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:45,649 INFO L495 AbstractCegarLoop]: Abstraction has 10638 states and 16708 transitions. [2022-11-03 03:30:45,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-03 03:30:45,649 INFO L276 IsEmpty]: Start isEmpty. Operand 10638 states and 16708 transitions. [2022-11-03 03:30:45,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2022-11-03 03:30:45,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:45,667 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:30:45,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-03 03:30:45,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:30:45,868 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:45,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:45,869 INFO L85 PathProgramCache]: Analyzing trace with hash 726287433, now seen corresponding path program 1 times [2022-11-03 03:30:45,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:30:45,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287938141] [2022-11-03 03:30:45,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:45,870 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:30:45,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:30:45,871 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:30:45,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 03:30:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:46,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 1728 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:30:46,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 798 proven. 29 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-11-03 03:30:46,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 70 proven. 116 refuted. 0 times theorem prover too weak. 1191 trivial. 0 not checked. [2022-11-03 03:30:47,954 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:30:47,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287938141] [2022-11-03 03:30:47,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287938141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:47,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1437683976] [2022-11-03 03:30:47,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:47,954 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:30:47,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:30:47,961 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:30:47,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 03:30:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:48,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 1728 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:30:48,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 825 proven. 147 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2022-11-03 03:30:48,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 54 proven. 42 refuted. 0 times theorem prover too weak. 1281 trivial. 0 not checked. [2022-11-03 03:30:49,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1437683976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:49,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520119457] [2022-11-03 03:30:49,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:49,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:49,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:49,555 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:49,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-03 03:30:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:49,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 1728 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:30:49,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 798 proven. 29 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-11-03 03:30:50,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 70 proven. 116 refuted. 0 times theorem prover too weak. 1191 trivial. 0 not checked. [2022-11-03 03:30:51,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520119457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:51,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:30:51,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 5, 5, 9, 11] total 21 [2022-11-03 03:30:51,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324491492] [2022-11-03 03:30:51,069 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:30:51,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 03:30:51,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:30:51,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 03:30:51,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:30:51,072 INFO L87 Difference]: Start difference. First operand 10638 states and 16708 transitions. Second operand has 21 states, 19 states have (on average 19.57894736842105) internal successors, (372), 19 states have internal predecessors, (372), 17 states have call successors, (88), 9 states have call predecessors, (88), 11 states have return successors, (90), 17 states have call predecessors, (90), 17 states have call successors, (90) [2022-11-03 03:32:14,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:14,793 INFO L93 Difference]: Finished difference Result 75766 states and 129328 transitions. [2022-11-03 03:32:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2022-11-03 03:32:14,795 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 19.57894736842105) internal successors, (372), 19 states have internal predecessors, (372), 17 states have call successors, (88), 9 states have call predecessors, (88), 11 states have return successors, (90), 17 states have call predecessors, (90), 17 states have call successors, (90) Word has length 460 [2022-11-03 03:32:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:15,305 INFO L225 Difference]: With dead ends: 75766 [2022-11-03 03:32:15,306 INFO L226 Difference]: Without dead ends: 64654 [2022-11-03 03:32:15,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3029 GetRequests, 2809 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20995 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=5350, Invalid=43712, Unknown=0, NotChecked=0, Total=49062 [2022-11-03 03:32:15,558 INFO L413 NwaCegarLoop]: 2067 mSDtfsCounter, 28541 mSDsluCounter, 8252 mSDsCounter, 0 mSdLazyCounter, 28619 mSolverCounterSat, 15286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28666 SdHoareTripleChecker+Valid, 10319 SdHoareTripleChecker+Invalid, 43905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 15286 IncrementalHoareTripleChecker+Valid, 28619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:15,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28666 Valid, 10319 Invalid, 43905 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [15286 Valid, 28619 Invalid, 0 Unknown, 0 Unchecked, 68.1s Time] [2022-11-03 03:32:15,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64654 states. [2022-11-03 03:32:21,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64654 to 48645. [2022-11-03 03:32:21,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48645 states, 36326 states have (on average 1.4244618179816109) internal successors, (51745), 38007 states have internal predecessors, (51745), 8589 states have call successors, (8589), 3371 states have call predecessors, (8589), 3729 states have return successors, (14595), 8155 states have call predecessors, (14595), 8557 states have call successors, (14595) [2022-11-03 03:32:21,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48645 states to 48645 states and 74929 transitions. [2022-11-03 03:32:21,711 INFO L78 Accepts]: Start accepts. Automaton has 48645 states and 74929 transitions. Word has length 460 [2022-11-03 03:32:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:21,712 INFO L495 AbstractCegarLoop]: Abstraction has 48645 states and 74929 transitions. [2022-11-03 03:32:21,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 19.57894736842105) internal successors, (372), 19 states have internal predecessors, (372), 17 states have call successors, (88), 9 states have call predecessors, (88), 11 states have return successors, (90), 17 states have call predecessors, (90), 17 states have call successors, (90) [2022-11-03 03:32:21,713 INFO L276 IsEmpty]: Start isEmpty. Operand 48645 states and 74929 transitions. [2022-11-03 03:32:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-11-03 03:32:21,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:21,764 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:21,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:22,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-03 03:32:22,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2022-11-03 03:32:22,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:22,391 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:22,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:22,392 INFO L85 PathProgramCache]: Analyzing trace with hash -805642549, now seen corresponding path program 1 times [2022-11-03 03:32:22,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:22,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739241694] [2022-11-03 03:32:22,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:22,393 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:22,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:22,393 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:22,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c0ea7b5-9d71-4c09-a785-547f6a07129a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 03:32:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:23,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 1752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:32:23,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 598 proven. 0 refuted. 0 times theorem prover too weak. 619 trivial. 0 not checked. [2022-11-03 03:32:23,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:23,439 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:23,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739241694] [2022-11-03 03:32:23,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739241694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:23,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:23,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:32:23,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867276785] [2022-11-03 03:32:23,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:23,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:32:23,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:23,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:32:23,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:32:23,442 INFO L87 Difference]: Start difference. First operand 48645 states and 74929 transitions. Second operand has 6 states, 6 states have (on average 35.833333333333336) internal successors, (215), 6 states have internal predecessors, (215), 6 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2022-11-03 03:32:32,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:32,761 INFO L93 Difference]: Finished difference Result 90619 states and 143496 transitions. [2022-11-03 03:32:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:32:32,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 35.833333333333336) internal successors, (215), 6 states have internal predecessors, (215), 6 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 478 [2022-11-03 03:32:32,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:33,026 INFO L225 Difference]: With dead ends: 90619 [2022-11-03 03:32:33,026 INFO L226 Difference]: Without dead ends: 43603 [2022-11-03 03:32:33,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:32:33,465 INFO L413 NwaCegarLoop]: 1065 mSDtfsCounter, 1568 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1705 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 2069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 1705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:33,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1670 Valid, 1710 Invalid, 2069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 1705 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 03:32:33,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43603 states.