./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5ead0301c8481fccc00f115bae086423ed9e315d4392b2a0732a4d381346437b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 15:05:36,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:05:36,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:05:36,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:05:36,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:05:36,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:05:36,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:05:36,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:05:36,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:05:36,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:05:36,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:05:36,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:05:36,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:05:36,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:05:36,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:05:36,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:05:36,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:05:36,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:05:36,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:05:36,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:05:36,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:05:36,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:05:36,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:05:36,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:05:36,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:05:36,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:05:36,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:05:36,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:05:36,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:05:36,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:05:36,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:05:36,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:05:36,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:05:36,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:05:36,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:05:36,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:05:36,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:05:36,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:05:36,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:05:36,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:05:36,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:05:36,588 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:05:36,610 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:05:36,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:05:36,611 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:05:36,611 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:05:36,612 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:05:36,612 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:05:36,612 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:05:36,612 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:05:36,612 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:05:36,613 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:05:36,613 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:05:36,613 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:05:36,613 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:05:36,613 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:05:36,613 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:05:36,614 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:05:36,614 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:05:36,614 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:05:36,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:05:36,615 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:05:36,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:05:36,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:05:36,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:05:36,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:05:36,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:05:36,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:05:36,616 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:05:36,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:05:36,616 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:05:36,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:05:36,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:05:36,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:05:36,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:05:36,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:05:36,617 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:05:36,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:05:36,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:05:36,617 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:05:36,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:05:36,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:05:36,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:05:36,618 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_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ead0301c8481fccc00f115bae086423ed9e315d4392b2a0732a4d381346437b [2022-12-14 15:05:36,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:05:36,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:05:36,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:05:36,820 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:05:36,821 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:05:36,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c [2022-12-14 15:05:39,290 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:05:39,554 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:05:39,555 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c [2022-12-14 15:05:39,572 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/data/8bb7808c9/4ba84a3b059b46c2b0ae00375c7916f3/FLAG7836eefb7 [2022-12-14 15:05:39,853 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/data/8bb7808c9/4ba84a3b059b46c2b0ae00375c7916f3 [2022-12-14 15:05:39,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:05:39,856 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:05:39,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:05:39,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:05:39,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:05:39,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:05:39" (1/1) ... [2022-12-14 15:05:39,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e85b9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:39, skipping insertion in model container [2022-12-14 15:05:39,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:05:39" (1/1) ... [2022-12-14 15:05:39,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:05:39,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:05:40,205 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c[71521,71534] [2022-12-14 15:05:40,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:05:40,218 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:05:40,296 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c[71521,71534] [2022-12-14 15:05:40,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:05:40,312 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:05:40,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40 WrapperNode [2022-12-14 15:05:40,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:05:40,313 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:05:40,313 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:05:40,313 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:05:40,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,334 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,360 INFO L138 Inliner]: procedures = 96, calls = 348, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 907 [2022-12-14 15:05:40,361 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:05:40,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:05:40,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:05:40,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:05:40,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,397 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:05:40,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:05:40,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:05:40,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:05:40,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (1/1) ... [2022-12-14 15:05:40,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:05:40,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:05:40,439 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:05:40,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:05:40,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:05:40,478 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-12-14 15:05:40,478 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-12-14 15:05:40,478 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 15:05:40,478 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 15:05:40,479 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 15:05:40,479 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 15:05:40,479 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 15:05:40,479 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 15:05:40,479 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 15:05:40,479 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 15:05:40,479 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 15:05:40,479 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 15:05:40,479 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 15:05:40,480 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 15:05:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 15:05:40,480 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 15:05:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 15:05:40,480 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 15:05:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 15:05:40,480 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 15:05:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 15:05:40,481 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 15:05:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 15:05:40,481 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 15:05:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 15:05:40,481 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 15:05:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 15:05:40,481 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 15:05:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 15:05:40,481 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 15:05:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 15:05:40,482 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 15:05:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 15:05:40,482 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 15:05:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 15:05:40,482 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 15:05:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 15:05:40,482 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 15:05:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 15:05:40,483 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 15:05:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 15:05:40,483 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 15:05:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:05:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 15:05:40,483 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 15:05:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 15:05:40,483 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 15:05:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 15:05:40,484 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 15:05:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 15:05:40,484 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 15:05:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:05:40,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:05:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 15:05:40,484 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 15:05:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-12-14 15:05:40,485 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-12-14 15:05:40,604 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:05:40,606 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:05:41,349 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:05:41,810 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:05:41,810 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 15:05:41,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:05:41 BoogieIcfgContainer [2022-12-14 15:05:41,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:05:41,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:05:41,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:05:41,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:05:41,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:05:39" (1/3) ... [2022-12-14 15:05:41,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe5b0ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:05:41, skipping insertion in model container [2022-12-14 15:05:41,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:05:40" (2/3) ... [2022-12-14 15:05:41,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe5b0ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:05:41, skipping insertion in model container [2022-12-14 15:05:41,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:05:41" (3/3) ... [2022-12-14 15:05:41,820 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product32.cil.c [2022-12-14 15:05:41,836 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:05:41,836 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:05:41,884 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:05:41,890 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;@6d88ab65, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:05:41,890 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:05:41,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 389 states, 257 states have (on average 1.5447470817120623) internal successors, (397), 275 states have internal predecessors, (397), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-12-14 15:05:41,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 15:05:41,904 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:41,904 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:05:41,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:41,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:41,909 INFO L85 PathProgramCache]: Analyzing trace with hash 2050435802, now seen corresponding path program 1 times [2022-12-14 15:05:41,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:41,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276376404] [2022-12-14 15:05:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:41,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:42,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 15:05:42,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:42,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276376404] [2022-12-14 15:05:42,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276376404] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:42,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:05:42,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:05:42,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485158766] [2022-12-14 15:05:42,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:42,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:05:42,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:42,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:05:42,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:05:42,460 INFO L87 Difference]: Start difference. First operand has 389 states, 257 states have (on average 1.5447470817120623) internal successors, (397), 275 states have internal predecessors, (397), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 15:05:42,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:42,808 INFO L93 Difference]: Finished difference Result 1143 states and 1798 transitions. [2022-12-14 15:05:42,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:05:42,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2022-12-14 15:05:42,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:42,825 INFO L225 Difference]: With dead ends: 1143 [2022-12-14 15:05:42,825 INFO L226 Difference]: Without dead ends: 755 [2022-12-14 15:05:42,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:05:42,834 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 577 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:42,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 1259 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:05:42,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-12-14 15:05:42,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 719. [2022-12-14 15:05:42,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 489 states have (on average 1.5460122699386503) internal successors, (756), 515 states have internal predecessors, (756), 182 states have call successors, (182), 49 states have call predecessors, (182), 47 states have return successors, (187), 169 states have call predecessors, (187), 180 states have call successors, (187) [2022-12-14 15:05:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1125 transitions. [2022-12-14 15:05:42,938 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1125 transitions. Word has length 43 [2022-12-14 15:05:42,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:42,938 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 1125 transitions. [2022-12-14 15:05:42,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 15:05:42,939 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1125 transitions. [2022-12-14 15:05:42,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 15:05:42,945 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:42,945 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:05:42,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:05:42,945 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:42,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:42,946 INFO L85 PathProgramCache]: Analyzing trace with hash 923609694, now seen corresponding path program 1 times [2022-12-14 15:05:42,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:42,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158099153] [2022-12-14 15:05:42,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:42,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 15:05:43,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:43,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158099153] [2022-12-14 15:05:43,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158099153] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:05:43,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383315888] [2022-12-14 15:05:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:43,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:05:43,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:05:43,257 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:05:43,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:05:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:43,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 15:05:43,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:05:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 15:05:43,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:05:43,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383315888] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:43,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:05:43,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-12-14 15:05:43,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982064339] [2022-12-14 15:05:43,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:43,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:05:43,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:43,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:05:43,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:05:43,584 INFO L87 Difference]: Start difference. First operand 719 states and 1125 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:05:44,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:44,065 INFO L93 Difference]: Finished difference Result 1692 states and 2622 transitions. [2022-12-14 15:05:44,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:05:44,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 86 [2022-12-14 15:05:44,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:44,073 INFO L225 Difference]: With dead ends: 1692 [2022-12-14 15:05:44,073 INFO L226 Difference]: Without dead ends: 984 [2022-12-14 15:05:44,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:05:44,078 INFO L413 NwaCegarLoop]: 649 mSDtfsCounter, 391 mSDsluCounter, 1820 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2469 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:44,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 2469 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:05:44,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-12-14 15:05:44,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 970. [2022-12-14 15:05:44,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 645 states have (on average 1.4806201550387597) internal successors, (955), 672 states have internal predecessors, (955), 249 states have call successors, (249), 75 states have call predecessors, (249), 75 states have return successors, (279), 236 states have call predecessors, (279), 245 states have call successors, (279) [2022-12-14 15:05:44,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1483 transitions. [2022-12-14 15:05:44,136 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1483 transitions. Word has length 86 [2022-12-14 15:05:44,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:44,136 INFO L495 AbstractCegarLoop]: Abstraction has 970 states and 1483 transitions. [2022-12-14 15:05:44,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 15:05:44,136 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1483 transitions. [2022-12-14 15:05:44,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 15:05:44,139 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:44,140 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:05:44,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:05:44,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:05:44,340 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:44,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:44,341 INFO L85 PathProgramCache]: Analyzing trace with hash 654587187, now seen corresponding path program 1 times [2022-12-14 15:05:44,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:44,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471191482] [2022-12-14 15:05:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:44,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 15:05:44,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:44,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471191482] [2022-12-14 15:05:44,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471191482] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:44,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:05:44,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 15:05:44,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719960540] [2022-12-14 15:05:44,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:44,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:05:44,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:44,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:05:44,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:05:44,528 INFO L87 Difference]: Start difference. First operand 970 states and 1483 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 15:05:46,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:46,297 INFO L93 Difference]: Finished difference Result 2917 states and 4521 transitions. [2022-12-14 15:05:46,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 15:05:46,298 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2022-12-14 15:05:46,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:46,308 INFO L225 Difference]: With dead ends: 2917 [2022-12-14 15:05:46,309 INFO L226 Difference]: Without dead ends: 1960 [2022-12-14 15:05:46,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:05:46,315 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 1155 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 2851 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 3319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 2851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:46,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1252 Valid, 1277 Invalid, 3319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 2851 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 15:05:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2022-12-14 15:05:46,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1716. [2022-12-14 15:05:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1155 states have (on average 1.503030303030303) internal successors, (1736), 1205 states have internal predecessors, (1736), 427 states have call successors, (427), 131 states have call predecessors, (427), 133 states have return successors, (485), 406 states have call predecessors, (485), 421 states have call successors, (485) [2022-12-14 15:05:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2648 transitions. [2022-12-14 15:05:46,393 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2648 transitions. Word has length 87 [2022-12-14 15:05:46,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:46,393 INFO L495 AbstractCegarLoop]: Abstraction has 1716 states and 2648 transitions. [2022-12-14 15:05:46,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 15:05:46,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2648 transitions. [2022-12-14 15:05:46,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-14 15:05:46,396 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:46,396 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:05:46,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 15:05:46,397 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:46,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:46,397 INFO L85 PathProgramCache]: Analyzing trace with hash 738263057, now seen corresponding path program 1 times [2022-12-14 15:05:46,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:46,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087120371] [2022-12-14 15:05:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:46,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 15:05:46,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:46,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087120371] [2022-12-14 15:05:46,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087120371] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:46,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:05:46,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 15:05:46,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659727613] [2022-12-14 15:05:46,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:46,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 15:05:46,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:46,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 15:05:46,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 15:05:46,634 INFO L87 Difference]: Start difference. First operand 1716 states and 2648 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 15:05:48,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:48,617 INFO L93 Difference]: Finished difference Result 2094 states and 3320 transitions. [2022-12-14 15:05:48,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 15:05:48,618 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2022-12-14 15:05:48,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:48,626 INFO L225 Difference]: With dead ends: 2094 [2022-12-14 15:05:48,626 INFO L226 Difference]: Without dead ends: 2092 [2022-12-14 15:05:48,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-12-14 15:05:48,628 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 1457 mSDsluCounter, 1564 mSDsCounter, 0 mSdLazyCounter, 3403 mSolverCounterSat, 860 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 4263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 860 IncrementalHoareTripleChecker+Valid, 3403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:48,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1479 Valid, 2013 Invalid, 4263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [860 Valid, 3403 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 15:05:48,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2022-12-14 15:05:48,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1896. [2022-12-14 15:05:48,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1249 states have (on average 1.4939951961569256) internal successors, (1866), 1321 states have internal predecessors, (1866), 509 states have call successors, (509), 131 states have call predecessors, (509), 137 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-12-14 15:05:48,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2944 transitions. [2022-12-14 15:05:48,724 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2944 transitions. Word has length 91 [2022-12-14 15:05:48,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:48,725 INFO L495 AbstractCegarLoop]: Abstraction has 1896 states and 2944 transitions. [2022-12-14 15:05:48,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 15:05:48,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2944 transitions. [2022-12-14 15:05:48,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 15:05:48,728 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:48,728 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:05:48,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 15:05:48,728 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:48,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:48,729 INFO L85 PathProgramCache]: Analyzing trace with hash -270674715, now seen corresponding path program 1 times [2022-12-14 15:05:48,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:48,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662934943] [2022-12-14 15:05:48,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:48,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 15:05:48,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:48,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662934943] [2022-12-14 15:05:48,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662934943] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:48,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:05:48,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:05:48,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315616967] [2022-12-14 15:05:48,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:48,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:05:48,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:48,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:05:48,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:05:48,835 INFO L87 Difference]: Start difference. First operand 1896 states and 2944 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 15:05:49,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:49,072 INFO L93 Difference]: Finished difference Result 3878 states and 6086 transitions. [2022-12-14 15:05:49,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:05:49,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 122 [2022-12-14 15:05:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:49,080 INFO L225 Difference]: With dead ends: 3878 [2022-12-14 15:05:49,080 INFO L226 Difference]: Without dead ends: 1994 [2022-12-14 15:05:49,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:05:49,088 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 30 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:49,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1657 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:05:49,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2022-12-14 15:05:49,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1908. [2022-12-14 15:05:49,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1261 states have (on average 1.4892942109436955) internal successors, (1878), 1333 states have internal predecessors, (1878), 509 states have call successors, (509), 131 states have call predecessors, (509), 137 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-12-14 15:05:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2956 transitions. [2022-12-14 15:05:49,167 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2956 transitions. Word has length 122 [2022-12-14 15:05:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:49,167 INFO L495 AbstractCegarLoop]: Abstraction has 1908 states and 2956 transitions. [2022-12-14 15:05:49,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 15:05:49,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2956 transitions. [2022-12-14 15:05:49,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 15:05:49,171 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:49,171 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:05:49,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 15:05:49,171 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:49,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2008186455, now seen corresponding path program 1 times [2022-12-14 15:05:49,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:49,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053797774] [2022-12-14 15:05:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:49,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 15:05:49,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:49,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053797774] [2022-12-14 15:05:49,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053797774] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:05:49,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688907506] [2022-12-14 15:05:49,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:49,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:05:49,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:05:49,376 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:05:49,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:05:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:49,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 1533 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:05:49,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:05:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 15:05:49,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:05:49,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688907506] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:49,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:05:49,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-12-14 15:05:49,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322954629] [2022-12-14 15:05:49,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:49,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:05:49,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:49,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:05:49,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:05:49,621 INFO L87 Difference]: Start difference. First operand 1908 states and 2956 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:05:49,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:49,888 INFO L93 Difference]: Finished difference Result 3960 states and 6260 transitions. [2022-12-14 15:05:49,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:05:49,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 129 [2022-12-14 15:05:49,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:49,896 INFO L225 Difference]: With dead ends: 3960 [2022-12-14 15:05:49,896 INFO L226 Difference]: Without dead ends: 2064 [2022-12-14 15:05:49,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:05:49,906 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 213 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:49,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1446 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:05:49,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2022-12-14 15:05:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 2064. [2022-12-14 15:05:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 1413 states have (on average 1.5357395612172682) internal successors, (2170), 1485 states have internal predecessors, (2170), 509 states have call successors, (509), 135 states have call predecessors, (509), 141 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-12-14 15:05:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 3248 transitions. [2022-12-14 15:05:49,985 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 3248 transitions. Word has length 129 [2022-12-14 15:05:49,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:49,985 INFO L495 AbstractCegarLoop]: Abstraction has 2064 states and 3248 transitions. [2022-12-14 15:05:49,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:05:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 3248 transitions. [2022-12-14 15:05:49,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 15:05:49,989 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:49,989 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:05:49,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:05:50,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:05:50,190 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:50,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:50,190 INFO L85 PathProgramCache]: Analyzing trace with hash -74726140, now seen corresponding path program 1 times [2022-12-14 15:05:50,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:50,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780568518] [2022-12-14 15:05:50,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:50,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-14 15:05:50,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:50,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780568518] [2022-12-14 15:05:50,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780568518] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:05:50,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755913337] [2022-12-14 15:05:50,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:50,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:05:50,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:05:50,341 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:05:50,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:05:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:50,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:05:50,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:05:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 15:05:50,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:05:50,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755913337] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:50,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:05:50,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 15:05:50,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308657627] [2022-12-14 15:05:50,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:50,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:05:50,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:50,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:05:50,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:05:50,612 INFO L87 Difference]: Start difference. First operand 2064 states and 3248 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:05:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:50,919 INFO L93 Difference]: Finished difference Result 4272 states and 6838 transitions. [2022-12-14 15:05:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:05:50,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 134 [2022-12-14 15:05:50,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:50,929 INFO L225 Difference]: With dead ends: 4272 [2022-12-14 15:05:50,929 INFO L226 Difference]: Without dead ends: 2220 [2022-12-14 15:05:50,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:05:50,936 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 211 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:50,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1446 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:05:50,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2022-12-14 15:05:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2220. [2022-12-14 15:05:51,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 1565 states have (on average 1.5731629392971247) internal successors, (2462), 1637 states have internal predecessors, (2462), 509 states have call successors, (509), 139 states have call predecessors, (509), 145 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-12-14 15:05:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 3540 transitions. [2022-12-14 15:05:51,013 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 3540 transitions. Word has length 134 [2022-12-14 15:05:51,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:51,014 INFO L495 AbstractCegarLoop]: Abstraction has 2220 states and 3540 transitions. [2022-12-14 15:05:51,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:05:51,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 3540 transitions. [2022-12-14 15:05:51,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-12-14 15:05:51,017 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:51,018 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:05:51,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:05:51,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 15:05:51,218 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:51,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:51,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1739134196, now seen corresponding path program 1 times [2022-12-14 15:05:51,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:51,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382057327] [2022-12-14 15:05:51,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:51,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 15:05:51,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:51,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382057327] [2022-12-14 15:05:51,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382057327] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:05:51,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121699018] [2022-12-14 15:05:51,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:51,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:05:51,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:05:51,446 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:05:51,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:05:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:51,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:05:51,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:05:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 15:05:51,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:05:51,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121699018] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:51,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:05:51,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 15:05:51,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177524997] [2022-12-14 15:05:51,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:51,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:05:51,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:51,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:05:51,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:05:51,714 INFO L87 Difference]: Start difference. First operand 2220 states and 3540 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:05:51,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:51,998 INFO L93 Difference]: Finished difference Result 4584 states and 7416 transitions. [2022-12-14 15:05:51,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:05:51,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 138 [2022-12-14 15:05:51,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:52,007 INFO L225 Difference]: With dead ends: 4584 [2022-12-14 15:05:52,008 INFO L226 Difference]: Without dead ends: 2376 [2022-12-14 15:05:52,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:05:52,016 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 209 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:52,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1446 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:05:52,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2022-12-14 15:05:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2376. [2022-12-14 15:05:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 1717 states have (on average 1.603960396039604) internal successors, (2754), 1789 states have internal predecessors, (2754), 509 states have call successors, (509), 143 states have call predecessors, (509), 149 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-12-14 15:05:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 3832 transitions. [2022-12-14 15:05:52,116 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 3832 transitions. Word has length 138 [2022-12-14 15:05:52,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:52,116 INFO L495 AbstractCegarLoop]: Abstraction has 2376 states and 3832 transitions. [2022-12-14 15:05:52,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:05:52,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 3832 transitions. [2022-12-14 15:05:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 15:05:52,122 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:52,122 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:05:52,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:05:52,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 15:05:52,323 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:52,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:52,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1379326665, now seen corresponding path program 1 times [2022-12-14 15:05:52,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:52,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895148671] [2022-12-14 15:05:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:52,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 15:05:52,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:52,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895148671] [2022-12-14 15:05:52,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895148671] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:05:52,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408843365] [2022-12-14 15:05:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:52,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:05:52,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:05:52,462 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:05:52,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:05:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:52,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 1545 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:05:52,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:05:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 15:05:52,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:05:52,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408843365] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:52,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:05:52,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 15:05:52,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622162188] [2022-12-14 15:05:52,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:52,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:05:52,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:52,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:05:52,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:05:52,704 INFO L87 Difference]: Start difference. First operand 2376 states and 3832 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:05:52,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:52,954 INFO L93 Difference]: Finished difference Result 4896 states and 7994 transitions. [2022-12-14 15:05:52,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:05:52,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 141 [2022-12-14 15:05:52,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:52,962 INFO L225 Difference]: With dead ends: 4896 [2022-12-14 15:05:52,963 INFO L226 Difference]: Without dead ends: 2532 [2022-12-14 15:05:52,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:05:52,969 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 207 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:52,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1446 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:05:52,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2022-12-14 15:05:53,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2532. [2022-12-14 15:05:53,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2532 states, 1869 states have (on average 1.6297485286249331) internal successors, (3046), 1941 states have internal predecessors, (3046), 509 states have call successors, (509), 147 states have call predecessors, (509), 153 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-12-14 15:05:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2532 states to 2532 states and 4124 transitions. [2022-12-14 15:05:53,050 INFO L78 Accepts]: Start accepts. Automaton has 2532 states and 4124 transitions. Word has length 141 [2022-12-14 15:05:53,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:53,050 INFO L495 AbstractCegarLoop]: Abstraction has 2532 states and 4124 transitions. [2022-12-14 15:05:53,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:05:53,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2532 states and 4124 transitions. [2022-12-14 15:05:53,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 15:05:53,054 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:53,055 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:05:53,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:05:53,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:05:53,255 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:53,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:53,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1915164473, now seen corresponding path program 1 times [2022-12-14 15:05:53,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:53,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024051023] [2022-12-14 15:05:53,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:53,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 15:05:53,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:53,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024051023] [2022-12-14 15:05:53,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024051023] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:53,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:05:53,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:05:53,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844061649] [2022-12-14 15:05:53,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:53,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:05:53,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:53,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:05:53,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:05:53,356 INFO L87 Difference]: Start difference. First operand 2532 states and 4124 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 15:05:53,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:53,617 INFO L93 Difference]: Finished difference Result 5220 states and 8578 transitions. [2022-12-14 15:05:53,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:05:53,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 143 [2022-12-14 15:05:53,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:53,626 INFO L225 Difference]: With dead ends: 5220 [2022-12-14 15:05:53,627 INFO L226 Difference]: Without dead ends: 2668 [2022-12-14 15:05:53,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:05:53,634 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 99 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:53,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1459 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:05:53,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2022-12-14 15:05:53,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 2668. [2022-12-14 15:05:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2668 states, 2001 states have (on average 1.5582208895552223) internal successors, (3118), 2073 states have internal predecessors, (3118), 509 states have call successors, (509), 151 states have call predecessors, (509), 157 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2022-12-14 15:05:53,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 4196 transitions. [2022-12-14 15:05:53,722 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 4196 transitions. Word has length 143 [2022-12-14 15:05:53,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:53,722 INFO L495 AbstractCegarLoop]: Abstraction has 2668 states and 4196 transitions. [2022-12-14 15:05:53,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 15:05:53,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 4196 transitions. [2022-12-14 15:05:53,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 15:05:53,726 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:53,726 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:05:53,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 15:05:53,727 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:53,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:53,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1352019160, now seen corresponding path program 1 times [2022-12-14 15:05:53,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:53,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617836753] [2022-12-14 15:05:53,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:53,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 15:05:53,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:53,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617836753] [2022-12-14 15:05:53,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617836753] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:53,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:05:53,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 15:05:53,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993771339] [2022-12-14 15:05:53,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:53,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:05:53,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:53,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:05:53,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:05:53,946 INFO L87 Difference]: Start difference. First operand 2668 states and 4196 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-12-14 15:05:56,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:56,130 INFO L93 Difference]: Finished difference Result 6865 states and 10989 transitions. [2022-12-14 15:05:56,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 15:05:56,130 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 143 [2022-12-14 15:05:56,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:56,142 INFO L225 Difference]: With dead ends: 6865 [2022-12-14 15:05:56,142 INFO L226 Difference]: Without dead ends: 3844 [2022-12-14 15:05:56,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-12-14 15:05:56,151 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 1673 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 4570 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 2027 SdHoareTripleChecker+Invalid, 5454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 4570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:56,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1737 Valid, 2027 Invalid, 5454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 4570 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 15:05:56,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2022-12-14 15:05:56,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 3666. [2022-12-14 15:05:56,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3666 states, 2616 states have (on average 1.480886850152905) internal successors, (3874), 2746 states have internal predecessors, (3874), 793 states have call successors, (793), 231 states have call predecessors, (793), 256 states have return successors, (988), 745 states have call predecessors, (988), 787 states have call successors, (988) [2022-12-14 15:05:56,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 5655 transitions. [2022-12-14 15:05:56,335 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 5655 transitions. Word has length 143 [2022-12-14 15:05:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:56,335 INFO L495 AbstractCegarLoop]: Abstraction has 3666 states and 5655 transitions. [2022-12-14 15:05:56,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-12-14 15:05:56,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 5655 transitions. [2022-12-14 15:05:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 15:05:56,339 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:56,339 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:05:56,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 15:05:56,339 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:56,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:56,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2060850148, now seen corresponding path program 1 times [2022-12-14 15:05:56,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:56,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672091257] [2022-12-14 15:05:56,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:56,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 15:05:58,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:58,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672091257] [2022-12-14 15:05:58,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672091257] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:05:58,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014813248] [2022-12-14 15:05:58,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:58,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:05:58,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:05:58,411 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:05:58,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:05:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:58,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 15:05:58,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:06:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 15:06:00,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:06:28,430 WARN L233 SmtUtils]: Spent 25.84s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 15:06:54,836 WARN L233 SmtUtils]: Spent 25.38s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 15:06:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-12-14 15:06:56,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014813248] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:06:56,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [443149208] [2022-12-14 15:06:56,304 INFO L159 IcfgInterpreter]: Started Sifa with 100 locations of interest [2022-12-14 15:06:56,304 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:06:56,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:06:56,310 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:06:56,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:06:58,168 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2022-12-14 15:07:05,242 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 577 for LOIs [2022-12-14 15:07:21,046 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 120 for LOIs [2022-12-14 15:07:21,501 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 511 for LOIs [2022-12-14 15:07:21,800 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 508 for LOIs [2022-12-14 15:07:23,717 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 461 for LOIs [2022-12-14 15:07:23,824 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 431 for LOIs [2022-12-14 15:07:23,888 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-12-14 15:07:27,047 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 15:07:27,598 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 15:07:27,733 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull with input of size 444 for LOIs [2022-12-14 15:07:28,786 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 45 for LOIs [2022-12-14 15:07:28,795 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:08:10,361 WARN L233 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 511 DAG size of output: 449 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:08:16,563 WARN L233 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 515 DAG size of output: 454 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:11:17,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '90712#(and (= (select |#length| 15) 25) (= 9 (select |#length| 5)) (= (select |#length| 9) 21) (= |old(~floorButtons_2~0)| 0) (= (select (select |#memory_int| 28) 2) 105) (= 32 (select (select |#memory_int| 28) 0)) (= 30 (select |#length| 7)) (= (select |#valid| 30) 1) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select (select |#memory_int| 31) 2) 105) (= (select |#valid| 15) 1) (= ~executiveFloor~0 4) (= (select (select |#memory_int| 34) 2) 105) (= |old(~persons_1~0)| 0) (= 32 (select (select |#memory_int| 34) 0)) (= 10 (select |#length| 16)) (= (select |#length| 33) 4) (= (select |#valid| 26) 1) (= |old(~persons_5~0)| 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (= (select (select |#memory_int| 26) 3) 0) (= (select (select |#memory_int| 20) 2) 0) (= 3 (select |#length| 20)) (= |old(~doorState~0)| 1) (= |old(~persons_2~0)| 0) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= ~persons_5~0 0) (= |old(~persons_4~0)| 0) (= (select (select |#memory_int| 24) 1) 73) (= (select (select |#memory_int| 23) 3) 110) (= 91 (select (select |#memory_int| 18) 0)) (= (select |#length| 12) 25) (= (select (select |#memory_int| 25) 3) 0) (= 91 (select (select |#memory_int| 17) 0)) (= (select (select |#memory_int| 30) 4) 58) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (= |old(~floorButtons_0~0)| 0) (= (select |#valid| 11) 1) (= (select |#valid| 27) 1) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (= (select |#valid| 33) 1) (= |old(~blocked~0)| 0) (= (select (select |#memory_int| 32) 2) 105) (= 30 (select |#length| 4)) (= (select (select |#memory_int| 29) 2) 105) (= (select |#length| 28) 4) (= 4 (select |#length| 31)) (= (select |#length| 27) 4) (= (select |#length| 22) 3) (= 4 (select |#length| 26)) (= 6 (select |#length| 30)) (= ~calls_0~0 0) (= 112 (select (select |#memory_int| 22) 1)) (= (select (select |#memory_int| 17) 2) 93) (= (select (select |#memory_int| 27) 3) 0) (= 76 (select (select |#memory_int| 24) 2)) (= ~head~0.offset 0) (= (select (select |#memory_int| 32) 3) 0) (= |old(~weight~0)| 0) (= 2 (select |#length| 1)) (= (select |#length| 8) 9) (= (select (select |#memory_int| 28) 3) 0) (= (select (select |#memory_int| 29) 3) 0) (<= |timeShift_isExecutiveFloor_~floorID#1| 0) (= 95 (select (select |#memory_int| 30) 2)) (= 32 (select (select |#memory_int| 30) 0)) (= (select (select |#memory_int| 30) 1) 70) (= 4 (select |#length| 25)) (= ~persons_4~0 0) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= (select |#valid| 18) 1) (= (select |#valid| 22) 1) (= 30 (select |#length| 13)) (= (select (select |#memory_int| 18) 3) 0) (= 2 (select |#length| 36)) (= ~personOnFloor_0_0~0 0) (= (select (select |#memory_int| 26) 2) 105) (= (select (select |#memory_int| 34) 1) 37) (= (select (select |#memory_int| 19) 4) 0) (= (select |#valid| 24) 1) (= 30 (select |#length| 10)) (= (select (select |#memory_int| 29) 1) 37) (= (select (select |#memory_int| 25) 1) 37) (= (select (select |#memory_int| 17) 3) 0) (= 4 (select |#length| 34)) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= (select (select |#memory_int| 31) 1) 37) (= 32 (select |#length| 2)) (= (select |#valid| 28) 1) (= (select (select |#memory_int| 18) 2) 32) (= (select (select |#memory_int| 25) 2) 105) (= (select |#length| 17) 4) (= (select |#valid| 37) 1) (= (select (select |#memory_int| 27) 1) 37) (= (select |#length| 35) 4) (= (select |#valid| 4) 1) (= 5 (select |#length| 23)) (= (select (select |#memory_int| 35) 3) 0) (= ~persons_3~0 0) (= 119 (select (select |#memory_int| 23) 2)) (= 32 (select (select |#memory_int| 24) 0)) (= 32 (select (select |#memory_int| 26) 0)) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~31#1|) (= |old(~doorState~0)| |timeShift_~tmp~28#1|) (= (select (select |#memory_int| 32) 1) 37) (= (select (select |#memory_int| 28) 1) 37) (= |old(~floorButtons_4~0)| 0) (= (select (select |#memory_int| 30) 5) 0) (= (select (select |#memory_int| 22) 2) 0) (= (select (select |#memory_int| 20) 1) 105) (= (select (select |#memory_int| 33) 3) 0) (= |old(~persons_0~0)| 0) (= (select |#valid| 1) 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~13#1| |timeShift_isExecutiveFloor_#res#1|) (= (select |#valid| 20) 1) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (= (select |#length| 37) 9) (= 97 (select (select |#memory_int| 19) 1)) (= 32 (select (select |#memory_int| 35) 0)) (= (select |#length| 6) 21) (= (select (select |#memory_int| 36) 1) 0) (= (select (select |#memory_int| 23) 0) 100) (= ~doorState~0 1) (= (select |#valid| 21) 1) (= 7 (select |#length| 24)) (= 58 (select (select |#memory_int| 24) 5)) (= ~floorButtons_0~0 0) (= (select (select |#memory_int| 24) 6) 0) (= (select (select |#memory_int| 31) 0) 32) (= (select (select |#memory_int| 33) 1) 37) (= ~currentFloorID~0 0) (= 32 (select (select |#memory_int| 27) 0)) (= (select |#valid| 14) 1) (= 95 (select (select |#memory_int| 24) 3)) (= |old(~persons_3~0)| 0) (= ~persons_1~0 0) (= 9 (select |#length| 14)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 33) 0) 32) (= |timeShift_isExecutiveFloor_~retValue_acc~31#1| |timeShift_isExecutiveFloor_#res#1|) (= ~persons_0~0 0) (= (select (select |#memory_int| 35) 1) 37) (= (select |#valid| 25) 1) (= |old(~floorButtons_3~0)| 0) (= 4 (select |#length| 18)) (<= 0 |timeShift_isExecutiveFloor_~floorID#1|) (= ~head~0.base 0) (= (select |#length| 32) 4) (= 112 (select (select |#memory_int| 24) 4)) (= (select (select |#memory_int| 17) 1) 95) (= (select (select |#memory_int| 34) 3) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select |#valid| 36) 1) (= 9 (select |#length| 11)) (= (select |#length| 29) 4) (= (select (select |#memory_int| 1) 0) 48) (= ~blocked~0 0) (= (select |#valid| 23) 1) (= 32 (select (select |#memory_int| 29) 0)) (= (select (select |#memory_int| 26) 1) 37) (= |old(~currentHeading~0)| 1) (= 112 (select (select |#memory_int| 30) 3)) (= (select (select |#memory_int| 23) 4) 0) (= (select |#valid| 19) 1) (= |old(~personOnFloor_5_1~0)| 1) (= 1 |old(~calls_1~0)|) (= 32 (select (select |#memory_int| 19) 3)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 33) 2) 105) (= (select (select |#memory_int| 27) 2) 105) (= (select |#valid| 16) 1) (= 111 (select (select |#memory_int| 23) 1)) (= 116 (select (select |#memory_int| 19) 2)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 20) 0) 37) (= (select (select |#memory_int| 1) 1) 0) (= |old(~floorButtons_1~0)| 0) (= (select (select |#memory_int| 36) 0) 10) (= |old(~currentFloorID~0)| 0) (= (select |#valid| 29) 1) (= (select (select |#memory_int| 22) 0) 117) (= |timeShift_isExecutiveFloor_~retValue_acc~31#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (= ~maximumWeight~0 100) (= (select (select |#memory_int| 25) 0) 32) (= (select (select |#memory_int| 31) 3) 0) (= (select |#length| 21) 10) (= (select |#valid| 17) 1) (= 93 (select (select |#memory_int| 18) 1)) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~31#1|) (= 32 (select (select |#memory_int| 19) 0)) (= (select |#length| 19) 5) (= (select |#valid| 13) 1) (< 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= (select (select |#memory_int| 35) 2) 105) (= |#NULL.base| 0) (= ~persons_2~0 0) (= 32 (select (select |#memory_int| 32) 0)))' at error location [2022-12-14 15:11:17,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:11:17,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:11:17,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 20, 16] total 72 [2022-12-14 15:11:17,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726333090] [2022-12-14 15:11:17,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:11:17,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-12-14 15:11:17,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:11:17,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-12-14 15:11:17,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1391, Invalid=18069, Unknown=0, NotChecked=0, Total=19460 [2022-12-14 15:11:17,572 INFO L87 Difference]: Start difference. First operand 3666 states and 5655 transitions. Second operand has 72 states, 55 states have (on average 3.8545454545454545) internal successors, (212), 57 states have internal predecessors, (212), 21 states have call successors, (57), 10 states have call predecessors, (57), 28 states have return successors, (57), 29 states have call predecessors, (57), 21 states have call successors, (57) [2022-12-14 15:14:46,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:14:46,722 INFO L93 Difference]: Finished difference Result 38014 states and 65163 transitions. [2022-12-14 15:14:46,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 799 states. [2022-12-14 15:14:46,723 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 55 states have (on average 3.8545454545454545) internal successors, (212), 57 states have internal predecessors, (212), 21 states have call successors, (57), 10 states have call predecessors, (57), 28 states have return successors, (57), 29 states have call predecessors, (57), 21 states have call successors, (57) Word has length 144 [2022-12-14 15:14:46,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:14:46,853 INFO L225 Difference]: With dead ends: 38014 [2022-12-14 15:14:46,853 INFO L226 Difference]: Without dead ends: 29851 [2022-12-14 15:14:46,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1386 GetRequests, 429 SyntacticMatches, 26 SemanticMatches, 931 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382087 ImplicationChecksByTransitivity, 353.8s TimeCoverageRelationStatistics Valid=48263, Invalid=821293, Unknown=0, NotChecked=0, Total=869556 [2022-12-14 15:14:46,968 INFO L413 NwaCegarLoop]: 796 mSDtfsCounter, 27468 mSDsluCounter, 23802 mSDsCounter, 0 mSdLazyCounter, 153243 mSolverCounterSat, 23830 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27518 SdHoareTripleChecker+Valid, 24598 SdHoareTripleChecker+Invalid, 177073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.6s SdHoareTripleChecker+Time, 23830 IncrementalHoareTripleChecker+Valid, 153243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:14:46,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27518 Valid, 24598 Invalid, 177073 Unknown, 0 Unchecked, 0.6s Time], IncrementalHoareTripleChecker [23830 Valid, 153243 Invalid, 0 Unknown, 0 Unchecked, 79.6s Time] [2022-12-14 15:14:46,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29851 states. [2022-12-14 15:14:48,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29851 to 21353. [2022-12-14 15:14:48,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21353 states, 16779 states have (on average 1.4706478336015256) internal successors, (24676), 17544 states have internal predecessors, (24676), 3152 states have call successors, (3152), 1136 states have call predecessors, (3152), 1421 states have return successors, (4304), 2880 states have call predecessors, (4304), 3144 states have call successors, (4304) [2022-12-14 15:14:49,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21353 states to 21353 states and 32132 transitions. [2022-12-14 15:14:49,015 INFO L78 Accepts]: Start accepts. Automaton has 21353 states and 32132 transitions. Word has length 144 [2022-12-14 15:14:49,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:14:49,015 INFO L495 AbstractCegarLoop]: Abstraction has 21353 states and 32132 transitions. [2022-12-14 15:14:49,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 55 states have (on average 3.8545454545454545) internal successors, (212), 57 states have internal predecessors, (212), 21 states have call successors, (57), 10 states have call predecessors, (57), 28 states have return successors, (57), 29 states have call predecessors, (57), 21 states have call successors, (57) [2022-12-14 15:14:49,015 INFO L276 IsEmpty]: Start isEmpty. Operand 21353 states and 32132 transitions. [2022-12-14 15:14:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 15:14:49,030 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:14:49,030 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:14:49,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 15:14:49,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:14:49,231 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:14:49,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:14:49,232 INFO L85 PathProgramCache]: Analyzing trace with hash -690233023, now seen corresponding path program 1 times [2022-12-14 15:14:49,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:14:49,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670094131] [2022-12-14 15:14:49,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:14:49,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:14:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-12-14 15:14:49,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:14:49,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670094131] [2022-12-14 15:14:49,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670094131] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:14:49,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798296814] [2022-12-14 15:14:49,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:14:49,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:14:49,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:14:49,398 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:14:49,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:14:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:49,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 1568 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:14:49,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:14:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-12-14 15:14:50,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:14:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-12-14 15:14:50,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798296814] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:14:50,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1057831172] [2022-12-14 15:14:50,325 INFO L159 IcfgInterpreter]: Started Sifa with 105 locations of interest [2022-12-14 15:14:50,325 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:14:50,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:14:50,325 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:14:50,325 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:14:52,086 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2022-12-14 15:14:58,515 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 576 for LOIs [2022-12-14 15:15:01,605 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 443 for LOIs [2022-12-14 15:15:01,674 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 443 for LOIs [2022-12-14 15:15:02,294 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 445 for LOIs [2022-12-14 15:15:02,389 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-12-14 15:15:05,709 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 15:15:06,274 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 15:15:06,409 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 443 for LOIs [2022-12-14 15:15:06,477 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:16:11,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1057831172] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:16:11,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:16:11,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [8, 9, 8] total 48 [2022-12-14 15:16:11,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567239263] [2022-12-14 15:16:11,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:16:11,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 15:16:11,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:11,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 15:16:11,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1929, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 15:16:11,994 INFO L87 Difference]: Start difference. First operand 21353 states and 32132 transitions. Second operand has 28 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 10 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-12-14 15:17:25,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:17:25,053 INFO L93 Difference]: Finished difference Result 41827 states and 62966 transitions. [2022-12-14 15:17:25,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 15:17:25,054 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 10 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) Word has length 151 [2022-12-14 15:17:25,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:17:25,111 INFO L225 Difference]: With dead ends: 41827 [2022-12-14 15:17:25,111 INFO L226 Difference]: Without dead ends: 20325 [2022-12-14 15:17:25,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 411 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 110.7s TimeCoverageRelationStatistics Valid=511, Invalid=3149, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 15:17:25,154 INFO L413 NwaCegarLoop]: 476 mSDtfsCounter, 106 mSDsluCounter, 3092 mSDsCounter, 0 mSdLazyCounter, 6000 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 3568 SdHoareTripleChecker+Invalid, 6043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 6000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:17:25,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 3568 Invalid, 6043 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [43 Valid, 6000 Invalid, 0 Unknown, 0 Unchecked, 26.3s Time] [2022-12-14 15:17:25,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20325 states. [2022-12-14 15:17:26,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20325 to 19767. [2022-12-14 15:17:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19767 states, 15616 states have (on average 1.4788037909836065) internal successors, (23093), 16325 states have internal predecessors, (23093), 2889 states have call successors, (2889), 1007 states have call predecessors, (2889), 1261 states have return successors, (3830), 2631 states have call predecessors, (3830), 2881 states have call successors, (3830) [2022-12-14 15:17:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19767 states to 19767 states and 29812 transitions. [2022-12-14 15:17:26,712 INFO L78 Accepts]: Start accepts. Automaton has 19767 states and 29812 transitions. Word has length 151 [2022-12-14 15:17:26,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:17:26,713 INFO L495 AbstractCegarLoop]: Abstraction has 19767 states and 29812 transitions. [2022-12-14 15:17:26,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 10 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-12-14 15:17:26,713 INFO L276 IsEmpty]: Start isEmpty. Operand 19767 states and 29812 transitions. [2022-12-14 15:17:26,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-12-14 15:17:26,740 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:17:26,740 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:17:26,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 15:17:26,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 15:17:26,941 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:17:26,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:17:26,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1028691803, now seen corresponding path program 1 times [2022-12-14 15:17:26,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:17:26,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393594396] [2022-12-14 15:17:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:17:26,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:17:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:17:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 15:17:27,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:17:27,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393594396] [2022-12-14 15:17:27,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393594396] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:17:27,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652654958] [2022-12-14 15:17:27,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:17:27,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:17:27,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:17:27,304 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:17:27,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:17:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:17:27,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 2170 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:17:27,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:17:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-12-14 15:17:27,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:17:27,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652654958] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:17:27,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:17:27,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 24 [2022-12-14 15:17:27,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990235007] [2022-12-14 15:17:27,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:17:27,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:17:27,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:17:27,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:17:27,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-12-14 15:17:27,866 INFO L87 Difference]: Start difference. First operand 19767 states and 29812 transitions. Second operand has 10 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-12-14 15:17:31,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:17:31,920 INFO L93 Difference]: Finished difference Result 33626 states and 51242 transitions. [2022-12-14 15:17:31,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 15:17:31,921 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 215 [2022-12-14 15:17:31,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:17:31,967 INFO L225 Difference]: With dead ends: 33626 [2022-12-14 15:17:31,967 INFO L226 Difference]: Without dead ends: 16840 [2022-12-14 15:17:32,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-12-14 15:17:32,005 INFO L413 NwaCegarLoop]: 864 mSDtfsCounter, 1267 mSDsluCounter, 3106 mSDsCounter, 0 mSdLazyCounter, 3964 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1289 SdHoareTripleChecker+Valid, 3970 SdHoareTripleChecker+Invalid, 4258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 3964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:17:32,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1289 Valid, 3970 Invalid, 4258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 3964 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 15:17:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16840 states. [2022-12-14 15:17:33,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16840 to 16041. [2022-12-14 15:17:33,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16041 states, 12304 states have (on average 1.4674902470741222) internal successors, (18056), 12871 states have internal predecessors, (18056), 2599 states have call successors, (2599), 982 states have call predecessors, (2599), 1137 states have return successors, (3344), 2357 states have call predecessors, (3344), 2589 states have call successors, (3344) [2022-12-14 15:17:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16041 states to 16041 states and 23999 transitions. [2022-12-14 15:17:33,442 INFO L78 Accepts]: Start accepts. Automaton has 16041 states and 23999 transitions. Word has length 215 [2022-12-14 15:17:33,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:17:33,442 INFO L495 AbstractCegarLoop]: Abstraction has 16041 states and 23999 transitions. [2022-12-14 15:17:33,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-12-14 15:17:33,443 INFO L276 IsEmpty]: Start isEmpty. Operand 16041 states and 23999 transitions. [2022-12-14 15:17:33,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-12-14 15:17:33,462 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:17:33,462 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:17:33,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 15:17:33,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:17:33,665 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:17:33,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:17:33,666 INFO L85 PathProgramCache]: Analyzing trace with hash -2042246721, now seen corresponding path program 1 times [2022-12-14 15:17:33,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:17:33,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718212125] [2022-12-14 15:17:33,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:17:33,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:17:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:17:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2022-12-14 15:17:34,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:17:34,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718212125] [2022-12-14 15:17:34,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718212125] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:17:34,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524251787] [2022-12-14 15:17:34,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:17:34,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:17:34,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:17:34,241 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:17:34,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:17:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:17:34,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 2766 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:17:34,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:17:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-12-14 15:17:34,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:17:34,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524251787] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:17:34,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:17:34,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2022-12-14 15:17:34,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413137624] [2022-12-14 15:17:34,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:17:34,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:17:34,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:17:34,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:17:34,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-12-14 15:17:34,753 INFO L87 Difference]: Start difference. First operand 16041 states and 23999 transitions. Second operand has 10 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2022-12-14 15:17:38,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:17:38,227 INFO L93 Difference]: Finished difference Result 27069 states and 40579 transitions. [2022-12-14 15:17:38,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 15:17:38,228 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) Word has length 283 [2022-12-14 15:17:38,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:17:38,274 INFO L225 Difference]: With dead ends: 27069 [2022-12-14 15:17:38,274 INFO L226 Difference]: Without dead ends: 16221 [2022-12-14 15:17:38,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-12-14 15:17:38,299 INFO L413 NwaCegarLoop]: 853 mSDtfsCounter, 1331 mSDsluCounter, 3038 mSDsCounter, 0 mSdLazyCounter, 3957 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1353 SdHoareTripleChecker+Valid, 3891 SdHoareTripleChecker+Invalid, 4306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 3957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:17:38,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1353 Valid, 3891 Invalid, 4306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 3957 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 15:17:38,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16221 states. [2022-12-14 15:17:39,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16221 to 15737. [2022-12-14 15:17:39,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15737 states, 12000 states have (on average 1.4573333333333334) internal successors, (17488), 12567 states have internal predecessors, (17488), 2599 states have call successors, (2599), 982 states have call predecessors, (2599), 1137 states have return successors, (3344), 2357 states have call predecessors, (3344), 2589 states have call successors, (3344) [2022-12-14 15:17:39,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15737 states to 15737 states and 23431 transitions. [2022-12-14 15:17:39,724 INFO L78 Accepts]: Start accepts. Automaton has 15737 states and 23431 transitions. Word has length 283 [2022-12-14 15:17:39,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:17:39,724 INFO L495 AbstractCegarLoop]: Abstraction has 15737 states and 23431 transitions. [2022-12-14 15:17:39,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2022-12-14 15:17:39,725 INFO L276 IsEmpty]: Start isEmpty. Operand 15737 states and 23431 transitions. [2022-12-14 15:17:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-12-14 15:17:39,748 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:17:39,748 INFO L195 NwaCegarLoop]: trace histogram [14, 11, 11, 11, 11, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 15:17:39,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 15:17:39,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:17:39,950 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:17:39,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:17:39,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2016061186, now seen corresponding path program 1 times [2022-12-14 15:17:39,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:17:39,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630707686] [2022-12-14 15:17:39,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:17:39,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:17:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:17:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-12-14 15:17:40,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:17:40,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630707686] [2022-12-14 15:17:40,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630707686] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:17:40,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370968265] [2022-12-14 15:17:40,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:17:40,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:17:40,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:17:40,389 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:17:40,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:17:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:17:40,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 3971 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:17:40,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:17:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 301 proven. 0 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2022-12-14 15:17:40,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:17:40,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370968265] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:17:40,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:17:40,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-12-14 15:17:40,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60044732] [2022-12-14 15:17:40,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:17:40,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:17:40,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:17:40,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:17:40,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:17:40,857 INFO L87 Difference]: Start difference. First operand 15737 states and 23431 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2022-12-14 15:17:42,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:17:42,755 INFO L93 Difference]: Finished difference Result 27358 states and 41373 transitions. [2022-12-14 15:17:42,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:17:42,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 386 [2022-12-14 15:17:42,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:17:42,806 INFO L225 Difference]: With dead ends: 27358 [2022-12-14 15:17:42,807 INFO L226 Difference]: Without dead ends: 16780 [2022-12-14 15:17:42,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:17:42,836 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 463 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:17:42,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 1114 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:17:42,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16780 states. [2022-12-14 15:17:44,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16780 to 16581. [2022-12-14 15:17:44,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16581 states, 12577 states have (on average 1.4446211338156953) internal successors, (18169), 13148 states have internal predecessors, (18169), 2771 states have call successors, (2771), 1073 states have call predecessors, (2771), 1232 states have return successors, (3758), 2529 states have call predecessors, (3758), 2761 states have call successors, (3758) [2022-12-14 15:17:44,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16581 states to 16581 states and 24698 transitions. [2022-12-14 15:17:44,354 INFO L78 Accepts]: Start accepts. Automaton has 16581 states and 24698 transitions. Word has length 386 [2022-12-14 15:17:44,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:17:44,354 INFO L495 AbstractCegarLoop]: Abstraction has 16581 states and 24698 transitions. [2022-12-14 15:17:44,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2022-12-14 15:17:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 16581 states and 24698 transitions. [2022-12-14 15:17:44,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-12-14 15:17:44,375 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:17:44,375 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:17:44,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 15:17:44,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 15:17:44,577 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:17:44,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:17:44,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1105062785, now seen corresponding path program 1 times [2022-12-14 15:17:44,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:17:44,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133697834] [2022-12-14 15:17:44,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:17:44,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:17:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:17:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-12-14 15:17:44,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:17:44,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133697834] [2022-12-14 15:17:44,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133697834] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:17:44,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470100685] [2022-12-14 15:17:44,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:17:44,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:17:44,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:17:44,841 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:17:44,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 15:17:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:17:45,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 2168 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:17:45,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:17:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-12-14 15:17:45,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:17:45,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470100685] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:17:45,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:17:45,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2022-12-14 15:17:45,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978293388] [2022-12-14 15:17:45,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:17:45,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:17:45,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:17:45,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:17:45,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-12-14 15:17:45,256 INFO L87 Difference]: Start difference. First operand 16581 states and 24698 transitions. Second operand has 10 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-12-14 15:17:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:17:49,354 INFO L93 Difference]: Finished difference Result 27937 states and 41612 transitions. [2022-12-14 15:17:49,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 15:17:49,355 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 222 [2022-12-14 15:17:49,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:17:49,400 INFO L225 Difference]: With dead ends: 27937 [2022-12-14 15:17:49,400 INFO L226 Difference]: Without dead ends: 16761 [2022-12-14 15:17:49,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-12-14 15:17:49,426 INFO L413 NwaCegarLoop]: 841 mSDtfsCounter, 1201 mSDsluCounter, 2966 mSDsCounter, 0 mSdLazyCounter, 3950 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 3807 SdHoareTripleChecker+Invalid, 4174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 3950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:17:49,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1223 Valid, 3807 Invalid, 4174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 3950 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 15:17:49,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16761 states. [2022-12-14 15:17:50,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16761 to 16277. [2022-12-14 15:17:50,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16277 states, 12273 states have (on average 1.434123686140308) internal successors, (17601), 12844 states have internal predecessors, (17601), 2771 states have call successors, (2771), 1073 states have call predecessors, (2771), 1232 states have return successors, (3758), 2529 states have call predecessors, (3758), 2761 states have call successors, (3758) [2022-12-14 15:17:51,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16277 states to 16277 states and 24130 transitions. [2022-12-14 15:17:51,027 INFO L78 Accepts]: Start accepts. Automaton has 16277 states and 24130 transitions. Word has length 222 [2022-12-14 15:17:51,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:17:51,027 INFO L495 AbstractCegarLoop]: Abstraction has 16277 states and 24130 transitions. [2022-12-14 15:17:51,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-12-14 15:17:51,028 INFO L276 IsEmpty]: Start isEmpty. Operand 16277 states and 24130 transitions. [2022-12-14 15:17:51,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-12-14 15:17:51,057 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:17:51,057 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:17:51,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 15:17:51,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 15:17:51,257 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:17:51,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:17:51,258 INFO L85 PathProgramCache]: Analyzing trace with hash 400227187, now seen corresponding path program 1 times [2022-12-14 15:17:51,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:17:51,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241491239] [2022-12-14 15:17:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:17:51,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:17:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:17:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 21 proven. 38 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2022-12-14 15:17:51,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:17:51,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241491239] [2022-12-14 15:17:51,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241491239] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:17:51,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126841485] [2022-12-14 15:17:51,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:17:51,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:17:51,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:17:51,735 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:17:51,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 15:17:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:17:52,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 2762 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:17:52,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:17:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2022-12-14 15:17:52,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:17:52,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126841485] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:17:52,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:17:52,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2022-12-14 15:17:52,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924474319] [2022-12-14 15:17:52,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:17:52,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:17:52,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:17:52,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:17:52,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:17:52,274 INFO L87 Difference]: Start difference. First operand 16277 states and 24130 transitions. Second operand has 10 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2022-12-14 15:17:56,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:17:56,016 INFO L93 Difference]: Finished difference Result 27341 states and 40500 transitions. [2022-12-14 15:17:56,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 15:17:56,017 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) Word has length 289 [2022-12-14 15:17:56,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:17:56,064 INFO L225 Difference]: With dead ends: 27341 [2022-12-14 15:17:56,064 INFO L226 Difference]: Without dead ends: 16457 [2022-12-14 15:17:56,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-12-14 15:17:56,092 INFO L413 NwaCegarLoop]: 829 mSDtfsCounter, 1189 mSDsluCounter, 2894 mSDsCounter, 0 mSdLazyCounter, 3943 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 3723 SdHoareTripleChecker+Invalid, 4167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 3943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:17:56,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1211 Valid, 3723 Invalid, 4167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 3943 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 15:17:56,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16457 states. [2022-12-14 15:17:57,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16457 to 15973. [2022-12-14 15:17:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15973 states, 11969 states have (on average 1.4230929902247473) internal successors, (17033), 12540 states have internal predecessors, (17033), 2771 states have call successors, (2771), 1073 states have call predecessors, (2771), 1232 states have return successors, (3758), 2529 states have call predecessors, (3758), 2761 states have call successors, (3758) [2022-12-14 15:17:57,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15973 states to 15973 states and 23562 transitions. [2022-12-14 15:17:57,612 INFO L78 Accepts]: Start accepts. Automaton has 15973 states and 23562 transitions. Word has length 289 [2022-12-14 15:17:57,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:17:57,613 INFO L495 AbstractCegarLoop]: Abstraction has 15973 states and 23562 transitions. [2022-12-14 15:17:57,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2022-12-14 15:17:57,613 INFO L276 IsEmpty]: Start isEmpty. Operand 15973 states and 23562 transitions. [2022-12-14 15:17:57,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-12-14 15:17:57,632 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:17:57,632 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:17:57,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 15:17:57,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:17:57,834 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:17:57,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:17:57,835 INFO L85 PathProgramCache]: Analyzing trace with hash 501854283, now seen corresponding path program 1 times [2022-12-14 15:17:57,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:17:57,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765344278] [2022-12-14 15:17:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:17:57,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:17:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:18:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 56 proven. 54 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-12-14 15:18:01,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:18:01,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765344278] [2022-12-14 15:18:01,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765344278] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:18:01,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890499095] [2022-12-14 15:18:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:18:01,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:18:01,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:18:01,394 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:18:01,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 15:18:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:18:01,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 3094 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 15:18:01,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:18:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-14 15:18:02,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:18:02,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890499095] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:18:02,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:18:02,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [45] total 56 [2022-12-14 15:18:02,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554025047] [2022-12-14 15:18:02,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:18:02,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 15:18:02,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:18:02,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 15:18:02,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2911, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 15:18:02,795 INFO L87 Difference]: Start difference. First operand 15973 states and 23562 transitions. Second operand has 13 states, 9 states have (on average 12.222222222222221) internal successors, (110), 10 states have internal predecessors, (110), 9 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-12-14 15:18:12,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:18:12,714 INFO L93 Difference]: Finished difference Result 37276 states and 55825 transitions. [2022-12-14 15:18:12,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 15:18:12,715 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 12.222222222222221) internal successors, (110), 10 states have internal predecessors, (110), 9 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) Word has length 239 [2022-12-14 15:18:12,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:18:12,806 INFO L225 Difference]: With dead ends: 37276 [2022-12-14 15:18:12,806 INFO L226 Difference]: Without dead ends: 27477 [2022-12-14 15:18:12,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=325, Invalid=4645, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 15:18:12,842 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 4964 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 8888 mSolverCounterSat, 2400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5200 SdHoareTripleChecker+Valid, 2328 SdHoareTripleChecker+Invalid, 11288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2400 IncrementalHoareTripleChecker+Valid, 8888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:18:12,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5200 Valid, 2328 Invalid, 11288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2400 Valid, 8888 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-12-14 15:18:12,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27477 states. [2022-12-14 15:18:15,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27477 to 25981. [2022-12-14 15:18:15,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25981 states, 18965 states have (on average 1.416873187450567) internal successors, (26871), 19871 states have internal predecessors, (26871), 5094 states have call successors, (5094), 1658 states have call predecessors, (5094), 1921 states have return successors, (6802), 4683 states have call predecessors, (6802), 5076 states have call successors, (6802) [2022-12-14 15:18:15,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25981 states to 25981 states and 38767 transitions. [2022-12-14 15:18:15,539 INFO L78 Accepts]: Start accepts. Automaton has 25981 states and 38767 transitions. Word has length 239 [2022-12-14 15:18:15,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:18:15,539 INFO L495 AbstractCegarLoop]: Abstraction has 25981 states and 38767 transitions. [2022-12-14 15:18:15,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 12.222222222222221) internal successors, (110), 10 states have internal predecessors, (110), 9 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-12-14 15:18:15,539 INFO L276 IsEmpty]: Start isEmpty. Operand 25981 states and 38767 transitions. [2022-12-14 15:18:15,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-12-14 15:18:15,563 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:18:15,563 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 15:18:15,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 15:18:15,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:18:15,765 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:18:15,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:18:15,766 INFO L85 PathProgramCache]: Analyzing trace with hash -997231005, now seen corresponding path program 1 times [2022-12-14 15:18:15,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:18:15,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208675976] [2022-12-14 15:18:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:18:15,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:18:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:18:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-12-14 15:18:16,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:18:16,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208675976] [2022-12-14 15:18:16,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208675976] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:18:16,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540292767] [2022-12-14 15:18:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:18:16,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:18:16,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:18:16,391 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:18:16,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 15:18:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:18:16,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 2760 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 15:18:16,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:18:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-12-14 15:18:16,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:18:16,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540292767] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:18:16,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:18:16,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2022-12-14 15:18:16,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673031216] [2022-12-14 15:18:16,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:18:16,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:18:16,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:18:16,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:18:16,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-12-14 15:18:16,848 INFO L87 Difference]: Start difference. First operand 25981 states and 38767 transitions. Second operand has 10 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2022-12-14 15:18:21,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:18:21,331 INFO L93 Difference]: Finished difference Result 46065 states and 69566 transitions. [2022-12-14 15:18:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 15:18:21,332 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) Word has length 289 [2022-12-14 15:18:21,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:18:21,426 INFO L225 Difference]: With dead ends: 46065 [2022-12-14 15:18:21,426 INFO L226 Difference]: Without dead ends: 26637 [2022-12-14 15:18:21,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-12-14 15:18:21,487 INFO L413 NwaCegarLoop]: 818 mSDtfsCounter, 1164 mSDsluCounter, 2857 mSDsCounter, 0 mSdLazyCounter, 3913 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1186 SdHoareTripleChecker+Valid, 3675 SdHoareTripleChecker+Invalid, 4140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 3913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:18:21,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1186 Valid, 3675 Invalid, 4140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 3913 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 15:18:21,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26637 states. [2022-12-14 15:18:24,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26637 to 25928. [2022-12-14 15:18:24,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25928 states, 18919 states have (on average 1.4120196627728738) internal successors, (26714), 19825 states have internal predecessors, (26714), 5087 states have call successors, (5087), 1658 states have call predecessors, (5087), 1921 states have return successors, (6795), 4676 states have call predecessors, (6795), 5069 states have call successors, (6795) [2022-12-14 15:18:24,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25928 states to 25928 states and 38596 transitions. [2022-12-14 15:18:24,226 INFO L78 Accepts]: Start accepts. Automaton has 25928 states and 38596 transitions. Word has length 289 [2022-12-14 15:18:24,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:18:24,227 INFO L495 AbstractCegarLoop]: Abstraction has 25928 states and 38596 transitions. [2022-12-14 15:18:24,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2022-12-14 15:18:24,227 INFO L276 IsEmpty]: Start isEmpty. Operand 25928 states and 38596 transitions. [2022-12-14 15:18:24,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-12-14 15:18:24,251 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:18:24,251 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:18:24,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 15:18:24,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:18:24,452 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:18:24,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:18:24,452 INFO L85 PathProgramCache]: Analyzing trace with hash -106846041, now seen corresponding path program 1 times [2022-12-14 15:18:24,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:18:24,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525040631] [2022-12-14 15:18:24,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:18:24,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:18:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:18:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 50 proven. 61 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-12-14 15:18:27,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:18:27,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525040631] [2022-12-14 15:18:27,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525040631] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:18:27,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732081118] [2022-12-14 15:18:27,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:18:27,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:18:27,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:18:27,588 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:18:27,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 15:18:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:18:28,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 3094 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 15:18:28,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:18:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-12-14 15:18:28,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:18:28,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732081118] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:18:28,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:18:28,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [40] total 50 [2022-12-14 15:18:28,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427771627] [2022-12-14 15:18:28,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:18:28,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 15:18:28,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:18:28,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 15:18:28,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2319, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 15:18:28,668 INFO L87 Difference]: Start difference. First operand 25928 states and 38596 transitions. Second operand has 12 states, 9 states have (on average 11.444444444444445) internal successors, (103), 10 states have internal predecessors, (103), 6 states have call successors, (36), 3 states have call predecessors, (36), 7 states have return successors, (34), 7 states have call predecessors, (34), 6 states have call successors, (34) [2022-12-14 15:18:35,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:18:35,796 INFO L93 Difference]: Finished difference Result 55193 states and 82778 transitions. [2022-12-14 15:18:35,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 15:18:35,798 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 11.444444444444445) internal successors, (103), 10 states have internal predecessors, (103), 6 states have call successors, (36), 3 states have call predecessors, (36), 7 states have return successors, (34), 7 states have call predecessors, (34), 6 states have call successors, (34) Word has length 239 [2022-12-14 15:18:35,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:18:35,920 INFO L225 Difference]: With dead ends: 55193 [2022-12-14 15:18:35,920 INFO L226 Difference]: Without dead ends: 30902 [2022-12-14 15:18:35,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=215, Invalid=3691, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 15:18:35,965 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 1057 mSDsluCounter, 1325 mSDsCounter, 0 mSdLazyCounter, 5086 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 5567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 5086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:18:35,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1114 Valid, 1593 Invalid, 5567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 5086 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 15:18:35,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30902 states. [2022-12-14 15:18:39,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30902 to 29711. [2022-12-14 15:18:39,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29711 states, 21529 states have (on average 1.398346416461517) internal successors, (30105), 22578 states have internal predecessors, (30105), 5906 states have call successors, (5906), 1930 states have call predecessors, (5906), 2275 states have return successors, (7899), 5487 states have call predecessors, (7899), 5888 states have call successors, (7899) [2022-12-14 15:18:39,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29711 states to 29711 states and 43910 transitions. [2022-12-14 15:18:39,341 INFO L78 Accepts]: Start accepts. Automaton has 29711 states and 43910 transitions. Word has length 239 [2022-12-14 15:18:39,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:18:39,342 INFO L495 AbstractCegarLoop]: Abstraction has 29711 states and 43910 transitions. [2022-12-14 15:18:39,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 11.444444444444445) internal successors, (103), 10 states have internal predecessors, (103), 6 states have call successors, (36), 3 states have call predecessors, (36), 7 states have return successors, (34), 7 states have call predecessors, (34), 6 states have call successors, (34) [2022-12-14 15:18:39,342 INFO L276 IsEmpty]: Start isEmpty. Operand 29711 states and 43910 transitions. [2022-12-14 15:18:39,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-12-14 15:18:39,379 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:18:39,380 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:18:39,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 15:18:39,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:18:39,582 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:18:39,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:18:39,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1173945068, now seen corresponding path program 1 times [2022-12-14 15:18:39,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:18:39,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177975339] [2022-12-14 15:18:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:18:39,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:18:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:18:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 56 proven. 52 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-12-14 15:18:43,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:18:43,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177975339] [2022-12-14 15:18:43,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177975339] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:18:43,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720119647] [2022-12-14 15:18:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:18:43,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:18:43,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:18:43,002 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:18:43,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbe75250-a81b-4d76-a31e-1e2c165842d5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 15:18:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:18:43,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 3362 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 15:18:43,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:18:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-14 15:18:44,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:18:44,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720119647] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:18:44,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:18:44,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [33] total 45 [2022-12-14 15:18:44,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332964840] [2022-12-14 15:18:44,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:18:44,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 15:18:44,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:18:44,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 15:18:44,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 15:18:44,387 INFO L87 Difference]: Start difference. First operand 29711 states and 43910 transitions. Second operand has 14 states, 10 states have (on average 11.1) internal successors, (111), 11 states have internal predecessors, (111), 10 states have call successors, (42), 5 states have call predecessors, (42), 8 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2022-12-14 15:18:55,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:18:55,994 INFO L93 Difference]: Finished difference Result 42178 states and 62743 transitions. [2022-12-14 15:18:55,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 15:18:55,994 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 11.1) internal successors, (111), 11 states have internal predecessors, (111), 10 states have call successors, (42), 5 states have call predecessors, (42), 8 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) Word has length 260 [2022-12-14 15:18:55,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:18:56,096 INFO L225 Difference]: With dead ends: 42178 [2022-12-14 15:18:56,096 INFO L226 Difference]: Without dead ends: 38728 [2022-12-14 15:18:56,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=370, Invalid=3412, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 15:18:56,120 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 2509 mSDsluCounter, 2367 mSDsCounter, 0 mSdLazyCounter, 9324 mSolverCounterSat, 1280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2766 SdHoareTripleChecker+Valid, 2846 SdHoareTripleChecker+Invalid, 10604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1280 IncrementalHoareTripleChecker+Valid, 9324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:18:56,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2766 Valid, 2846 Invalid, 10604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1280 Valid, 9324 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-12-14 15:18:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38728 states.