./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:41:31,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:41:31,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:41:31,267 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:41:31,268 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:41:31,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:41:31,270 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:41:31,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:41:31,273 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:41:31,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:41:31,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:41:31,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:41:31,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:41:31,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:41:31,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:41:31,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:41:31,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:41:31,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:41:31,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:41:31,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:41:31,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:41:31,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:41:31,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:41:31,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:41:31,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:41:31,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:41:31,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:41:31,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:41:31,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:41:31,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:41:31,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:41:31,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:41:31,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:41:31,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:41:31,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:41:31,300 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:41:31,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:41:31,301 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:41:31,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:41:31,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:41:31,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:41:31,307 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:41:31,344 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:41:31,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:41:31,345 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:41:31,346 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:41:31,346 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:41:31,347 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:41:31,347 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:41:31,347 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:41:31,348 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:41:31,348 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:41:31,348 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:41:31,348 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:41:31,349 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:41:31,349 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:41:31,349 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:41:31,349 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:41:31,350 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:41:31,350 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:41:31,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:41:31,351 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:41:31,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:41:31,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:41:31,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:41:31,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:41:31,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:41:31,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:41:31,353 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:41:31,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:41:31,353 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:41:31,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:41:31,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:41:31,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:41:31,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:41:31,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:41:31,355 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:41:31,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:41:31,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:41:31,356 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:41:31,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:41:31,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:41:31,356 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:41:31,357 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_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c [2022-11-03 01:41:31,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:41:31,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:41:31,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:41:31,660 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:41:31,661 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:41:31,663 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2022-11-03 01:41:31,754 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/data/c97d30c02/ccef830daa024e85b0b9c305b8c47386/FLAG752fd62cd [2022-11-03 01:41:32,517 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:41:32,517 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2022-11-03 01:41:32,550 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/data/c97d30c02/ccef830daa024e85b0b9c305b8c47386/FLAG752fd62cd [2022-11-03 01:41:32,699 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/data/c97d30c02/ccef830daa024e85b0b9c305b8c47386 [2022-11-03 01:41:32,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:41:32,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:41:32,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:41:32,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:41:32,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:41:32,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:41:32" (1/1) ... [2022-11-03 01:41:32,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e5e3533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:32, skipping insertion in model container [2022-11-03 01:41:32,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:41:32" (1/1) ... [2022-11-03 01:41:32,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:41:32,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:41:33,418 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2022-11-03 01:41:33,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:41:33,431 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:41:33,549 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2022-11-03 01:41:33,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:41:33,574 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:41:33,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:33 WrapperNode [2022-11-03 01:41:33,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:41:33,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:41:33,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:41:33,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:41:33,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:33" (1/1) ... [2022-11-03 01:41:33,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:33" (1/1) ... [2022-11-03 01:41:33,654 INFO L138 Inliner]: procedures = 89, calls = 329, calls flagged for inlining = 24, calls inlined = 21, statements flattened = 1003 [2022-11-03 01:41:33,655 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:41:33,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:41:33,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:41:33,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:41:33,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:33" (1/1) ... [2022-11-03 01:41:33,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:33" (1/1) ... [2022-11-03 01:41:33,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:33" (1/1) ... [2022-11-03 01:41:33,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:33" (1/1) ... [2022-11-03 01:41:33,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:33" (1/1) ... [2022-11-03 01:41:33,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:33" (1/1) ... [2022-11-03 01:41:33,704 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:33" (1/1) ... [2022-11-03 01:41:33,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:33" (1/1) ... [2022-11-03 01:41:33,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:41:33,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:41:33,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:41:33,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:41:33,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:33" (1/1) ... [2022-11-03 01:41:33,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:41:33,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:33,772 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:41:33,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:41:33,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:41:33,852 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 01:41:33,852 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 01:41:33,852 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 01:41:33,852 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 01:41:33,852 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 01:41:33,853 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 01:41:33,853 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 01:41:33,853 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 01:41:33,853 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 01:41:33,853 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 01:41:33,854 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 01:41:33,854 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 01:41:33,854 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 01:41:33,854 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 01:41:33,855 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 01:41:33,855 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 01:41:33,855 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 01:41:33,856 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 01:41:33,856 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 01:41:33,856 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 01:41:33,856 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 01:41:33,856 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 01:41:33,856 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 01:41:33,857 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 01:41:33,857 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 01:41:33,857 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 01:41:33,858 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 01:41:33,858 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 01:41:33,858 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 01:41:33,860 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 01:41:33,860 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 01:41:33,861 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 01:41:33,861 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 01:41:33,861 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 01:41:33,861 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-11-03 01:41:33,862 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-11-03 01:41:33,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:41:33,862 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 01:41:33,862 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 01:41:33,862 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 01:41:33,862 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 01:41:33,863 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 01:41:33,863 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 01:41:33,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:41:33,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:41:33,865 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 01:41:33,866 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 01:41:34,044 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:41:34,060 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:41:35,428 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:41:36,210 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:41:36,211 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:41:36,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:41:36 BoogieIcfgContainer [2022-11-03 01:41:36,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:41:36,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:41:36,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:41:36,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:41:36,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:41:32" (1/3) ... [2022-11-03 01:41:36,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c4c0e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:41:36, skipping insertion in model container [2022-11-03 01:41:36,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:33" (2/3) ... [2022-11-03 01:41:36,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c4c0e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:41:36, skipping insertion in model container [2022-11-03 01:41:36,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:41:36" (3/3) ... [2022-11-03 01:41:36,228 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product03.cil.c [2022-11-03 01:41:36,249 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:41:36,250 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:41:36,337 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:41:36,352 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;@5ea391a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:41:36,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:41:36,368 INFO L276 IsEmpty]: Start isEmpty. Operand has 347 states, 232 states have (on average 1.5775862068965518) internal successors, (366), 248 states have internal predecessors, (366), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-11-03 01:41:36,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 01:41:36,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:36,402 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:36,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:36,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:36,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1361539703, now seen corresponding path program 1 times [2022-11-03 01:41:36,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:36,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328171111] [2022-11-03 01:41:36,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:36,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 01:41:37,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:37,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328171111] [2022-11-03 01:41:37,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328171111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:37,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:37,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:41:37,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741000403] [2022-11-03 01:41:37,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:37,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:41:37,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:37,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:41:37,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:37,583 INFO L87 Difference]: Start difference. First operand has 347 states, 232 states have (on average 1.5775862068965518) internal successors, (366), 248 states have internal predecessors, (366), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 01:41:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:38,217 INFO L93 Difference]: Finished difference Result 1024 states and 1639 transitions. [2022-11-03 01:41:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:41:38,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 72 [2022-11-03 01:41:38,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:38,239 INFO L225 Difference]: With dead ends: 1024 [2022-11-03 01:41:38,240 INFO L226 Difference]: Without dead ends: 678 [2022-11-03 01:41:38,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:41:38,252 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 1166 mSDsluCounter, 2211 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 2707 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:38,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1170 Valid, 2707 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:41:38,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-11-03 01:41:38,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 664. [2022-11-03 01:41:38,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 448 states have (on average 1.5691964285714286) internal successors, (703), 476 states have internal predecessors, (703), 174 states have call successors, (174), 42 states have call predecessors, (174), 41 states have return successors, (178), 170 states have call predecessors, (178), 172 states have call successors, (178) [2022-11-03 01:41:38,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1055 transitions. [2022-11-03 01:41:38,409 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1055 transitions. Word has length 72 [2022-11-03 01:41:38,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:38,410 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 1055 transitions. [2022-11-03 01:41:38,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-03 01:41:38,411 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1055 transitions. [2022-11-03 01:41:38,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 01:41:38,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:38,419 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:38,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:41:38,420 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:38,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:38,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1870757883, now seen corresponding path program 1 times [2022-11-03 01:41:38,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:38,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388440371] [2022-11-03 01:41:38,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:38,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:38,788 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:41:38,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:38,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388440371] [2022-11-03 01:41:38,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388440371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:38,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:38,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:41:38,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957232573] [2022-11-03 01:41:38,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:38,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:41:38,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:38,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:41:38,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:41:38,794 INFO L87 Difference]: Start difference. First operand 664 states and 1055 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 01:41:39,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:39,618 INFO L93 Difference]: Finished difference Result 1009 states and 1605 transitions. [2022-11-03 01:41:39,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:41:39,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2022-11-03 01:41:39,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:39,632 INFO L225 Difference]: With dead ends: 1009 [2022-11-03 01:41:39,632 INFO L226 Difference]: Without dead ends: 676 [2022-11-03 01:41:39,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:39,643 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 515 mSDsluCounter, 1701 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 2247 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:39,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 2247 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:41:39,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-11-03 01:41:39,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 670. [2022-11-03 01:41:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 451 states have (on average 1.565410199556541) internal successors, (706), 481 states have internal predecessors, (706), 176 states have call successors, (176), 43 states have call predecessors, (176), 42 states have return successors, (183), 170 states have call predecessors, (183), 174 states have call successors, (183) [2022-11-03 01:41:39,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1065 transitions. [2022-11-03 01:41:39,754 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1065 transitions. Word has length 73 [2022-11-03 01:41:39,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:39,755 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 1065 transitions. [2022-11-03 01:41:39,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 01:41:39,756 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1065 transitions. [2022-11-03 01:41:39,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 01:41:39,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:39,764 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:39,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:41:39,764 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:39,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:39,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1188923024, now seen corresponding path program 1 times [2022-11-03 01:41:39,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:39,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77817442] [2022-11-03 01:41:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:39,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:41:40,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:40,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77817442] [2022-11-03 01:41:40,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77817442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:40,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:40,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:41:40,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586400747] [2022-11-03 01:41:40,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:40,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:41:40,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:40,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:41:40,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:41:40,270 INFO L87 Difference]: Start difference. First operand 670 states and 1065 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 01:41:41,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:41,043 INFO L93 Difference]: Finished difference Result 767 states and 1212 transitions. [2022-11-03 01:41:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:41:41,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 77 [2022-11-03 01:41:41,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:41,055 INFO L225 Difference]: With dead ends: 767 [2022-11-03 01:41:41,055 INFO L226 Difference]: Without dead ends: 765 [2022-11-03 01:41:41,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:41,065 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 630 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:41,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 1618 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:41:41,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-11-03 01:41:41,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 755. [2022-11-03 01:41:41,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 502 states have (on average 1.5318725099601593) internal successors, (769), 532 states have internal predecessors, (769), 198 states have call successors, (198), 56 states have call predecessors, (198), 54 states have return successors, (211), 190 states have call predecessors, (211), 195 states have call successors, (211) [2022-11-03 01:41:41,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1178 transitions. [2022-11-03 01:41:41,165 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1178 transitions. Word has length 77 [2022-11-03 01:41:41,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:41,166 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1178 transitions. [2022-11-03 01:41:41,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 01:41:41,167 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1178 transitions. [2022-11-03 01:41:41,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 01:41:41,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:41,172 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:41,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:41:41,172 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:41,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:41,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2049057985, now seen corresponding path program 1 times [2022-11-03 01:41:41,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:41,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045122893] [2022-11-03 01:41:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:41,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-03 01:41:41,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:41,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045122893] [2022-11-03 01:41:41,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045122893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:41,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:41,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:41:41,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377798284] [2022-11-03 01:41:41,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:41,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:41:41,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:41,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:41:41,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:41:41,392 INFO L87 Difference]: Start difference. First operand 755 states and 1178 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:41:41,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:41,602 INFO L93 Difference]: Finished difference Result 1536 states and 2426 transitions. [2022-11-03 01:41:41,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:41:41,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 108 [2022-11-03 01:41:41,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:41,610 INFO L225 Difference]: With dead ends: 1536 [2022-11-03 01:41:41,611 INFO L226 Difference]: Without dead ends: 793 [2022-11-03 01:41:41,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:41:41,627 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 54 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:41,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1522 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:41:41,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-03 01:41:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 759. [2022-11-03 01:41:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 506 states have (on average 1.5276679841897234) internal successors, (773), 536 states have internal predecessors, (773), 198 states have call successors, (198), 56 states have call predecessors, (198), 54 states have return successors, (211), 190 states have call predecessors, (211), 195 states have call successors, (211) [2022-11-03 01:41:41,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1182 transitions. [2022-11-03 01:41:41,749 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1182 transitions. Word has length 108 [2022-11-03 01:41:41,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:41,750 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 1182 transitions. [2022-11-03 01:41:41,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:41:41,751 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1182 transitions. [2022-11-03 01:41:41,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:41:41,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:41,767 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:41,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:41:41,767 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:41,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:41,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1105147089, now seen corresponding path program 1 times [2022-11-03 01:41:41,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:41,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651578845] [2022-11-03 01:41:41,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:41,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 01:41:42,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:42,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651578845] [2022-11-03 01:41:42,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651578845] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:42,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89861102] [2022-11-03 01:41:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:42,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:42,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:42,054 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:42,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:41:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:42,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:41:42,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:41:42,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:42,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89861102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:42,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:42,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 01:41:42,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840055726] [2022-11-03 01:41:42,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:42,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:41:42,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:42,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:41:42,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:42,447 INFO L87 Difference]: Start difference. First operand 759 states and 1182 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:41:42,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:42,783 INFO L93 Difference]: Finished difference Result 1584 states and 2514 transitions. [2022-11-03 01:41:42,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:41:42,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 111 [2022-11-03 01:41:42,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:42,790 INFO L225 Difference]: With dead ends: 1584 [2022-11-03 01:41:42,790 INFO L226 Difference]: Without dead ends: 837 [2022-11-03 01:41:42,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:42,796 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 213 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:42,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1296 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:41:42,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-11-03 01:41:42,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 837. [2022-11-03 01:41:42,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 582 states have (on average 1.5790378006872852) internal successors, (919), 612 states have internal predecessors, (919), 198 states have call successors, (198), 58 states have call predecessors, (198), 56 states have return successors, (211), 190 states have call predecessors, (211), 195 states have call successors, (211) [2022-11-03 01:41:42,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1328 transitions. [2022-11-03 01:41:42,892 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1328 transitions. Word has length 111 [2022-11-03 01:41:42,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:42,892 INFO L495 AbstractCegarLoop]: Abstraction has 837 states and 1328 transitions. [2022-11-03 01:41:42,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:41:42,893 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1328 transitions. [2022-11-03 01:41:42,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 01:41:42,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:42,896 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:42,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:43,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:43,111 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:43,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:43,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1487500342, now seen corresponding path program 1 times [2022-11-03 01:41:43,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:43,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11919862] [2022-11-03 01:41:43,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:43,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-03 01:41:43,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:43,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11919862] [2022-11-03 01:41:43,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11919862] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:43,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868448756] [2022-11-03 01:41:43,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:43,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:43,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:43,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:43,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:41:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:43,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 1279 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:41:43,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 01:41:43,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:43,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868448756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:43,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:43,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 01:41:43,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890075629] [2022-11-03 01:41:43,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:43,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:41:43,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:43,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:41:43,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:43,658 INFO L87 Difference]: Start difference. First operand 837 states and 1328 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:41:44,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:44,000 INFO L93 Difference]: Finished difference Result 1740 states and 2804 transitions. [2022-11-03 01:41:44,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:41:44,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 116 [2022-11-03 01:41:44,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:44,007 INFO L225 Difference]: With dead ends: 1740 [2022-11-03 01:41:44,007 INFO L226 Difference]: Without dead ends: 915 [2022-11-03 01:41:44,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:44,014 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 211 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:44,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1296 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:41:44,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-11-03 01:41:44,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 915. [2022-11-03 01:41:44,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 658 states have (on average 1.6185410334346504) internal successors, (1065), 688 states have internal predecessors, (1065), 198 states have call successors, (198), 60 states have call predecessors, (198), 58 states have return successors, (211), 190 states have call predecessors, (211), 195 states have call successors, (211) [2022-11-03 01:41:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1474 transitions. [2022-11-03 01:41:44,076 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1474 transitions. Word has length 116 [2022-11-03 01:41:44,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:44,076 INFO L495 AbstractCegarLoop]: Abstraction has 915 states and 1474 transitions. [2022-11-03 01:41:44,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:41:44,077 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1474 transitions. [2022-11-03 01:41:44,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 01:41:44,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:44,081 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:44,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:44,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 01:41:44,295 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:44,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:44,295 INFO L85 PathProgramCache]: Analyzing trace with hash 722808998, now seen corresponding path program 1 times [2022-11-03 01:41:44,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:44,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615605786] [2022-11-03 01:41:44,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:44,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-03 01:41:44,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:44,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615605786] [2022-11-03 01:41:44,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615605786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:44,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227299391] [2022-11-03 01:41:44,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:44,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:44,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:44,523 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:44,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:41:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:44,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:41:44,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 01:41:44,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:44,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227299391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:44,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:44,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 01:41:44,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301087302] [2022-11-03 01:41:44,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:44,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:41:44,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:44,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:41:44,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:44,857 INFO L87 Difference]: Start difference. First operand 915 states and 1474 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:41:45,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:45,223 INFO L93 Difference]: Finished difference Result 1896 states and 3094 transitions. [2022-11-03 01:41:45,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:41:45,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 120 [2022-11-03 01:41:45,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:45,230 INFO L225 Difference]: With dead ends: 1896 [2022-11-03 01:41:45,230 INFO L226 Difference]: Without dead ends: 993 [2022-11-03 01:41:45,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:45,236 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 209 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:45,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1296 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:41:45,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-11-03 01:41:45,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 993. [2022-11-03 01:41:45,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 734 states have (on average 1.6498637602179838) internal successors, (1211), 764 states have internal predecessors, (1211), 198 states have call successors, (198), 62 states have call predecessors, (198), 60 states have return successors, (211), 190 states have call predecessors, (211), 195 states have call successors, (211) [2022-11-03 01:41:45,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1620 transitions. [2022-11-03 01:41:45,291 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1620 transitions. Word has length 120 [2022-11-03 01:41:45,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:45,295 INFO L495 AbstractCegarLoop]: Abstraction has 993 states and 1620 transitions. [2022-11-03 01:41:45,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:41:45,295 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1620 transitions. [2022-11-03 01:41:45,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 01:41:45,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:45,298 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:45,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-03 01:41:45,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:45,515 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:45,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:45,515 INFO L85 PathProgramCache]: Analyzing trace with hash -456852239, now seen corresponding path program 1 times [2022-11-03 01:41:45,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:45,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997812855] [2022-11-03 01:41:45,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:45,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 01:41:45,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:45,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997812855] [2022-11-03 01:41:45,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997812855] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:45,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925334710] [2022-11-03 01:41:45,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:45,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:45,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:45,692 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:45,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:41:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:45,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:41:45,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:41:46,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:46,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925334710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:46,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:46,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 01:41:46,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943570218] [2022-11-03 01:41:46,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:46,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:41:46,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:46,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:41:46,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:46,030 INFO L87 Difference]: Start difference. First operand 993 states and 1620 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:41:46,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:46,351 INFO L93 Difference]: Finished difference Result 2052 states and 3384 transitions. [2022-11-03 01:41:46,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:41:46,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 123 [2022-11-03 01:41:46,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:46,359 INFO L225 Difference]: With dead ends: 2052 [2022-11-03 01:41:46,359 INFO L226 Difference]: Without dead ends: 1071 [2022-11-03 01:41:46,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:46,365 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 207 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:46,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1296 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:41:46,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2022-11-03 01:41:46,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 1071. [2022-11-03 01:41:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 810 states have (on average 1.6753086419753087) internal successors, (1357), 840 states have internal predecessors, (1357), 198 states have call successors, (198), 64 states have call predecessors, (198), 62 states have return successors, (211), 190 states have call predecessors, (211), 195 states have call successors, (211) [2022-11-03 01:41:46,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1766 transitions. [2022-11-03 01:41:46,424 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1766 transitions. Word has length 123 [2022-11-03 01:41:46,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:46,424 INFO L495 AbstractCegarLoop]: Abstraction has 1071 states and 1766 transitions. [2022-11-03 01:41:46,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:41:46,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1766 transitions. [2022-11-03 01:41:46,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 01:41:46,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:46,429 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:46,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:46,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:46,650 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:46,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:46,651 INFO L85 PathProgramCache]: Analyzing trace with hash 868611071, now seen corresponding path program 1 times [2022-11-03 01:41:46,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:46,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873913119] [2022-11-03 01:41:46,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:46,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 01:41:46,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:46,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873913119] [2022-11-03 01:41:46,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873913119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:46,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305365541] [2022-11-03 01:41:46,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:46,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:46,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:46,994 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:47,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:41:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:47,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 01:41:47,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-03 01:41:48,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:39,516 WARN L234 SmtUtils]: Spent 47.68s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-03 01:42:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-03 01:42:42,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305365541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:42,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [534854623] [2022-11-03 01:42:42,226 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2022-11-03 01:42:42,226 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:42:42,230 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:42:42,235 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:42:42,236 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:42:45,092 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2022-11-03 01:42:48,785 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-11-03 01:42:49,651 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 564 for LOIs [2022-11-03 01:43:02,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-03 01:43:02,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:02,979 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 01:43:02,982 INFO L158 Benchmark]: Toolchain (without parser) took 90278.94ms. Allocated memory was 92.3MB in the beginning and 671.1MB in the end (delta: 578.8MB). Free memory was 56.9MB in the beginning and 442.9MB in the end (delta: -386.1MB). Peak memory consumption was 417.8MB. Max. memory is 16.1GB. [2022-11-03 01:43:02,982 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 92.3MB. Free memory is still 43.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:43:02,982 INFO L158 Benchmark]: CACSL2BoogieTranslator took 868.94ms. Allocated memory was 92.3MB in the beginning and 130.0MB in the end (delta: 37.7MB). Free memory was 56.5MB in the beginning and 79.5MB in the end (delta: -23.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 01:43:02,983 INFO L158 Benchmark]: Boogie Procedure Inliner took 79.18ms. Allocated memory is still 130.0MB. Free memory was 79.5MB in the beginning and 74.2MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 01:43:02,983 INFO L158 Benchmark]: Boogie Preprocessor took 61.28ms. Allocated memory is still 130.0MB. Free memory was 74.2MB in the beginning and 69.1MB in the end (delta: 5.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 01:43:02,983 INFO L158 Benchmark]: RCFGBuilder took 2499.04ms. Allocated memory was 130.0MB in the beginning and 159.4MB in the end (delta: 29.4MB). Free memory was 69.1MB in the beginning and 93.1MB in the end (delta: -24.0MB). Peak memory consumption was 45.5MB. Max. memory is 16.1GB. [2022-11-03 01:43:02,984 INFO L158 Benchmark]: TraceAbstraction took 86762.38ms. Allocated memory was 159.4MB in the beginning and 671.1MB in the end (delta: 511.7MB). Free memory was 93.1MB in the beginning and 442.9MB in the end (delta: -349.8MB). Peak memory consumption was 387.4MB. Max. memory is 16.1GB. [2022-11-03 01:43:02,986 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 92.3MB. Free memory is still 43.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 868.94ms. Allocated memory was 92.3MB in the beginning and 130.0MB in the end (delta: 37.7MB). Free memory was 56.5MB in the beginning and 79.5MB in the end (delta: -23.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 79.18ms. Allocated memory is still 130.0MB. Free memory was 79.5MB in the beginning and 74.2MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.28ms. Allocated memory is still 130.0MB. Free memory was 74.2MB in the beginning and 69.1MB in the end (delta: 5.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 2499.04ms. Allocated memory was 130.0MB in the beginning and 159.4MB in the end (delta: 29.4MB). Free memory was 69.1MB in the beginning and 93.1MB in the end (delta: -24.0MB). Peak memory consumption was 45.5MB. Max. memory is 16.1GB. * TraceAbstraction took 86762.38ms. Allocated memory was 159.4MB in the beginning and 671.1MB in the end (delta: 511.7MB). Free memory was 93.1MB in the beginning and 442.9MB in the end (delta: -349.8MB). Peak memory consumption was 387.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 01:43:03,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:43:05,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:43:05,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:43:05,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:43:05,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:43:05,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:43:05,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:43:05,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:43:05,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:43:05,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:43:05,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:43:05,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:43:05,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:43:05,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:43:05,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:43:05,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:43:05,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:43:05,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:43:05,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:43:05,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:43:05,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:43:05,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:43:05,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:43:05,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:43:05,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:43:05,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:43:05,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:43:05,557 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:43:05,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:43:05,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:43:05,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:43:05,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:43:05,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:43:05,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:43:05,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:43:05,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:43:05,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:43:05,565 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:43:05,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:43:05,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:43:05,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:43:05,568 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 01:43:05,593 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:43:05,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:43:05,594 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:43:05,595 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:43:05,595 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:43:05,596 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:43:05,596 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:43:05,596 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:43:05,597 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:43:05,597 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:43:05,597 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:43:05,598 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:43:05,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:43:05,599 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:43:05,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:43:05,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:43:05,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:43:05,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:43:05,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:43:05,601 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:43:05,601 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:43:05,601 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:43:05,602 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:43:05,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:43:05,602 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:43:05,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:43:05,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:43:05,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:43:05,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:43:05,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:43:05,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:43:05,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:43:05,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:43:05,604 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:43:05,605 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:43:05,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:43:05,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:43:05,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:43:05,606 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ed4163e8f042a84d9cdccd4fee3ee0ba89fdce83cd991779acec4a51d9a650c [2022-11-03 01:43:05,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:43:06,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:43:06,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:43:06,009 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:43:06,014 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:43:06,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2022-11-03 01:43:06,098 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/data/013b5b88f/66ee4d44c06b4d79b0205855ae44d8c5/FLAG5405c398b [2022-11-03 01:43:06,793 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:43:06,793 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c [2022-11-03 01:43:06,830 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/data/013b5b88f/66ee4d44c06b4d79b0205855ae44d8c5/FLAG5405c398b [2022-11-03 01:43:07,021 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/data/013b5b88f/66ee4d44c06b4d79b0205855ae44d8c5 [2022-11-03 01:43:07,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:43:07,028 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:43:07,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:43:07,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:43:07,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:43:07,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:43:07" (1/1) ... [2022-11-03 01:43:07,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f6e97b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:07, skipping insertion in model container [2022-11-03 01:43:07,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:43:07" (1/1) ... [2022-11-03 01:43:07,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:43:07,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:43:07,758 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2022-11-03 01:43:07,761 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:43:07,796 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 01:43:07,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:43:08,028 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2022-11-03 01:43:08,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:43:08,044 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:43:08,202 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/sv-benchmarks/c/product-lines/elevator_spec14_product03.cil.c[68958,68971] [2022-11-03 01:43:08,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:43:08,235 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:43:08,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:08 WrapperNode [2022-11-03 01:43:08,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:43:08,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:43:08,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:43:08,238 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:43:08,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:08" (1/1) ... [2022-11-03 01:43:08,277 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:08" (1/1) ... [2022-11-03 01:43:08,328 INFO L138 Inliner]: procedures = 91, calls = 329, calls flagged for inlining = 24, calls inlined = 21, statements flattened = 947 [2022-11-03 01:43:08,329 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:43:08,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:43:08,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:43:08,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:43:08,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:08" (1/1) ... [2022-11-03 01:43:08,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:08" (1/1) ... [2022-11-03 01:43:08,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:08" (1/1) ... [2022-11-03 01:43:08,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:08" (1/1) ... [2022-11-03 01:43:08,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:08" (1/1) ... [2022-11-03 01:43:08,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:08" (1/1) ... [2022-11-03 01:43:08,386 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:08" (1/1) ... [2022-11-03 01:43:08,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:08" (1/1) ... [2022-11-03 01:43:08,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:43:08,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:43:08,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:43:08,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:43:08,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:08" (1/1) ... [2022-11-03 01:43:08,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:43:08,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:08,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:43:08,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:43:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:43:08,527 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 01:43:08,527 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 01:43:08,527 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 01:43:08,527 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 01:43:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 01:43:08,528 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 01:43:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 01:43:08,528 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 01:43:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 01:43:08,529 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 01:43:08,530 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 01:43:08,530 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 01:43:08,530 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 01:43:08,530 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 01:43:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 01:43:08,531 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 01:43:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 01:43:08,532 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 01:43:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 01:43:08,532 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 01:43:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 01:43:08,533 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 01:43:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 01:43:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 01:43:08,534 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 01:43:08,534 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 01:43:08,535 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 01:43:08,535 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 01:43:08,535 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 01:43:08,535 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 01:43:08,535 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 01:43:08,536 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 01:43:08,536 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 01:43:08,536 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 01:43:08,536 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 01:43:08,536 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-11-03 01:43:08,537 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-11-03 01:43:08,537 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 01:43:08,537 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 01:43:08,537 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 01:43:08,537 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 01:43:08,538 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 01:43:08,538 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 01:43:08,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:43:08,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:43:08,541 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 01:43:08,541 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 01:43:08,744 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:43:08,761 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:43:10,175 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:43:10,201 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:43:10,202 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:43:10,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:43:10 BoogieIcfgContainer [2022-11-03 01:43:10,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:43:10,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:43:10,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:43:10,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:43:10,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:43:07" (1/3) ... [2022-11-03 01:43:10,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4399d9d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:43:10, skipping insertion in model container [2022-11-03 01:43:10,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:08" (2/3) ... [2022-11-03 01:43:10,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4399d9d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:43:10, skipping insertion in model container [2022-11-03 01:43:10,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:43:10" (3/3) ... [2022-11-03 01:43:10,217 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product03.cil.c [2022-11-03 01:43:10,255 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:43:10,255 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:43:10,327 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:43:10,334 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;@79391e41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:43:10,334 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:43:10,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 517 states, 402 states have (on average 1.681592039800995) internal successors, (676), 418 states have internal predecessors, (676), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-11-03 01:43:10,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-03 01:43:10,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:10,370 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:10,371 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:10,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:10,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1965651267, now seen corresponding path program 1 times [2022-11-03 01:43:10,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:10,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199490059] [2022-11-03 01:43:10,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:10,394 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:10,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:10,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:10,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:43:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:10,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:43:10,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:11,123 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:43:11,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:11,125 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:11,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199490059] [2022-11-03 01:43:11,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199490059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:11,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:11,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:11,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054816430] [2022-11-03 01:43:11,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:11,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:43:11,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:11,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:43:11,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:43:11,182 INFO L87 Difference]: Start difference. First operand has 517 states, 402 states have (on average 1.681592039800995) internal successors, (676), 418 states have internal predecessors, (676), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:11,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:11,460 INFO L93 Difference]: Finished difference Result 1027 states and 1716 transitions. [2022-11-03 01:43:11,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:43:11,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2022-11-03 01:43:11,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:11,510 INFO L225 Difference]: With dead ends: 1027 [2022-11-03 01:43:11,511 INFO L226 Difference]: Without dead ends: 512 [2022-11-03 01:43:11,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:11,536 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 15 mSDsluCounter, 1673 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:11,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 2513 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:11,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-11-03 01:43:11,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2022-11-03 01:43:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 398 states have (on average 1.670854271356784) internal successors, (665), 413 states have internal predecessors, (665), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 01:43:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 846 transitions. [2022-11-03 01:43:11,688 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 846 transitions. Word has length 101 [2022-11-03 01:43:11,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:11,695 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 846 transitions. [2022-11-03 01:43:11,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:11,695 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 846 transitions. [2022-11-03 01:43:11,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 01:43:11,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:11,708 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:11,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:11,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:11,928 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:11,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:11,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1219828463, now seen corresponding path program 1 times [2022-11-03 01:43:11,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:11,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816405213] [2022-11-03 01:43:11,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:11,931 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:11,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:11,932 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:11,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:43:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:12,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:43:12,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:43:12,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:12,379 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:12,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816405213] [2022-11-03 01:43:12,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816405213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:12,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:12,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:12,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555817551] [2022-11-03 01:43:12,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:12,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:43:12,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:12,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:43:12,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:43:12,391 INFO L87 Difference]: Start difference. First operand 512 states and 846 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:12,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:12,506 INFO L93 Difference]: Finished difference Result 1007 states and 1669 transitions. [2022-11-03 01:43:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:43:12,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 102 [2022-11-03 01:43:12,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:12,519 INFO L225 Difference]: With dead ends: 1007 [2022-11-03 01:43:12,519 INFO L226 Difference]: Without dead ends: 512 [2022-11-03 01:43:12,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:12,524 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 12 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2481 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:12,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2481 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:43:12,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-11-03 01:43:12,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2022-11-03 01:43:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 398 states have (on average 1.6683417085427135) internal successors, (664), 413 states have internal predecessors, (664), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 01:43:12,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 845 transitions. [2022-11-03 01:43:12,572 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 845 transitions. Word has length 102 [2022-11-03 01:43:12,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:12,572 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 845 transitions. [2022-11-03 01:43:12,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:12,573 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 845 transitions. [2022-11-03 01:43:12,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 01:43:12,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:12,581 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:12,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:12,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:12,800 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:12,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:12,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1726293121, now seen corresponding path program 1 times [2022-11-03 01:43:12,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:12,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744417234] [2022-11-03 01:43:12,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:12,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:12,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:12,807 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:12,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:43:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:13,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:43:13,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:43:13,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:13,216 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:13,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744417234] [2022-11-03 01:43:13,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744417234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:13,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:13,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:13,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601207112] [2022-11-03 01:43:13,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:13,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:43:13,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:13,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:43:13,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:43:13,226 INFO L87 Difference]: Start difference. First operand 512 states and 845 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:13,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:13,313 INFO L93 Difference]: Finished difference Result 1007 states and 1668 transitions. [2022-11-03 01:43:13,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:43:13,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 103 [2022-11-03 01:43:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:13,320 INFO L225 Difference]: With dead ends: 1007 [2022-11-03 01:43:13,320 INFO L226 Difference]: Without dead ends: 512 [2022-11-03 01:43:13,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:13,327 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 10 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2481 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:13,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 2481 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:43:13,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-11-03 01:43:13,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2022-11-03 01:43:13,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 398 states have (on average 1.6658291457286432) internal successors, (663), 413 states have internal predecessors, (663), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 01:43:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 844 transitions. [2022-11-03 01:43:13,362 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 844 transitions. Word has length 103 [2022-11-03 01:43:13,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:13,365 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 844 transitions. [2022-11-03 01:43:13,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:13,366 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 844 transitions. [2022-11-03 01:43:13,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 01:43:13,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:13,382 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:13,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:13,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:13,584 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:13,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:13,585 INFO L85 PathProgramCache]: Analyzing trace with hash -787669171, now seen corresponding path program 1 times [2022-11-03 01:43:13,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:13,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952197484] [2022-11-03 01:43:13,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:13,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:13,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:13,588 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:13,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:43:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:13,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:43:13,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:43:14,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:14,009 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:14,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952197484] [2022-11-03 01:43:14,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952197484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:14,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:14,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:14,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588948589] [2022-11-03 01:43:14,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:14,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:43:14,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:14,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:43:14,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:43:14,018 INFO L87 Difference]: Start difference. First operand 512 states and 844 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:14,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:14,091 INFO L93 Difference]: Finished difference Result 1007 states and 1667 transitions. [2022-11-03 01:43:14,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:43:14,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2022-11-03 01:43:14,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:14,097 INFO L225 Difference]: With dead ends: 1007 [2022-11-03 01:43:14,098 INFO L226 Difference]: Without dead ends: 512 [2022-11-03 01:43:14,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:14,111 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 8 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2481 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:14,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2481 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:43:14,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-11-03 01:43:14,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2022-11-03 01:43:14,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 398 states have (on average 1.6633165829145728) internal successors, (662), 413 states have internal predecessors, (662), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 01:43:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 843 transitions. [2022-11-03 01:43:14,143 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 843 transitions. Word has length 104 [2022-11-03 01:43:14,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:14,144 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 843 transitions. [2022-11-03 01:43:14,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 843 transitions. [2022-11-03 01:43:14,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-03 01:43:14,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:14,149 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:14,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:14,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:14,376 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:14,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:14,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1999028667, now seen corresponding path program 1 times [2022-11-03 01:43:14,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:14,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523243171] [2022-11-03 01:43:14,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:14,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:14,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:14,378 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:14,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 01:43:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:14,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:43:14,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:43:14,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:14,785 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:14,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523243171] [2022-11-03 01:43:14,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523243171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:14,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:14,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:14,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976117683] [2022-11-03 01:43:14,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:14,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:43:14,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:14,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:43:14,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:43:14,788 INFO L87 Difference]: Start difference. First operand 512 states and 843 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:14,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:14,855 INFO L93 Difference]: Finished difference Result 1007 states and 1666 transitions. [2022-11-03 01:43:14,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:43:14,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 105 [2022-11-03 01:43:14,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:14,860 INFO L225 Difference]: With dead ends: 1007 [2022-11-03 01:43:14,860 INFO L226 Difference]: Without dead ends: 512 [2022-11-03 01:43:14,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:14,864 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 6 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2481 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:14,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2481 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:43:14,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-11-03 01:43:14,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2022-11-03 01:43:14,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 398 states have (on average 1.6608040201005025) internal successors, (661), 413 states have internal predecessors, (661), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 01:43:14,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 842 transitions. [2022-11-03 01:43:14,887 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 842 transitions. Word has length 105 [2022-11-03 01:43:14,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:14,887 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 842 transitions. [2022-11-03 01:43:14,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:14,888 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 842 transitions. [2022-11-03 01:43:14,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 01:43:14,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:14,892 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:14,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:15,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:15,105 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:15,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:15,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1946474889, now seen corresponding path program 1 times [2022-11-03 01:43:15,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:15,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866179880] [2022-11-03 01:43:15,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:15,107 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:15,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:15,108 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:15,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 01:43:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:15,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:43:15,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:43:15,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:15,533 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:15,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866179880] [2022-11-03 01:43:15,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866179880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:15,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:15,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:43:15,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79359837] [2022-11-03 01:43:15,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:15,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:43:15,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:15,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:43:15,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:43:15,535 INFO L87 Difference]: Start difference. First operand 512 states and 842 transitions. Second operand has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:43:15,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:15,724 INFO L93 Difference]: Finished difference Result 1018 states and 1683 transitions. [2022-11-03 01:43:15,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:43:15,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2022-11-03 01:43:15,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:15,729 INFO L225 Difference]: With dead ends: 1018 [2022-11-03 01:43:15,729 INFO L226 Difference]: Without dead ends: 527 [2022-11-03 01:43:15,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:43:15,733 INFO L413 NwaCegarLoop]: 828 mSDtfsCounter, 117 mSDsluCounter, 4040 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 4868 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:15,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 4868 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:15,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-11-03 01:43:15,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 525. [2022-11-03 01:43:15,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 408 states have (on average 1.6568627450980393) internal successors, (676), 425 states have internal predecessors, (676), 92 states have call successors, (92), 23 states have call predecessors, (92), 24 states have return successors, (94), 89 states have call predecessors, (94), 91 states have call successors, (94) [2022-11-03 01:43:15,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 862 transitions. [2022-11-03 01:43:15,757 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 862 transitions. Word has length 106 [2022-11-03 01:43:15,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:15,758 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 862 transitions. [2022-11-03 01:43:15,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:43:15,758 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 862 transitions. [2022-11-03 01:43:15,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 01:43:15,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:15,762 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:15,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:15,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:15,981 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:15,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:15,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1409960792, now seen corresponding path program 1 times [2022-11-03 01:43:15,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:15,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462755110] [2022-11-03 01:43:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:15,982 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:15,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:15,983 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:15,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 01:43:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:16,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:43:16,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:43:16,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:16,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:16,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462755110] [2022-11-03 01:43:16,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462755110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:16,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:16,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:16,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991854247] [2022-11-03 01:43:16,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:16,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:43:16,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:16,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:43:16,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:43:16,346 INFO L87 Difference]: Start difference. First operand 525 states and 862 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:16,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:16,416 INFO L93 Difference]: Finished difference Result 1025 states and 1694 transitions. [2022-11-03 01:43:16,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:43:16,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2022-11-03 01:43:16,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:16,421 INFO L225 Difference]: With dead ends: 1025 [2022-11-03 01:43:16,421 INFO L226 Difference]: Without dead ends: 521 [2022-11-03 01:43:16,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:16,425 INFO L413 NwaCegarLoop]: 829 mSDtfsCounter, 6 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2480 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:16,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2480 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:43:16,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-11-03 01:43:16,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 521. [2022-11-03 01:43:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 406 states have (on average 1.6576354679802956) internal successors, (673), 422 states have internal predecessors, (673), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (91), 88 states have call predecessors, (91), 90 states have call successors, (91) [2022-11-03 01:43:16,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 855 transitions. [2022-11-03 01:43:16,448 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 855 transitions. Word has length 106 [2022-11-03 01:43:16,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:16,449 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 855 transitions. [2022-11-03 01:43:16,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:16,449 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 855 transitions. [2022-11-03 01:43:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 01:43:16,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:16,453 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:16,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:16,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:16,670 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:16,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:16,671 INFO L85 PathProgramCache]: Analyzing trace with hash 135549763, now seen corresponding path program 1 times [2022-11-03 01:43:16,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:16,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76066915] [2022-11-03 01:43:16,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:16,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:16,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:16,674 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:16,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 01:43:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:16,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:43:16,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:43:16,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:16,999 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:16,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76066915] [2022-11-03 01:43:16,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76066915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:16,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:16,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:17,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630992185] [2022-11-03 01:43:17,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:17,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:43:17,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:17,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:43:17,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:43:17,002 INFO L87 Difference]: Start difference. First operand 521 states and 855 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:17,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:17,201 INFO L93 Difference]: Finished difference Result 1050 states and 1738 transitions. [2022-11-03 01:43:17,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:43:17,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 107 [2022-11-03 01:43:17,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:17,206 INFO L225 Difference]: With dead ends: 1050 [2022-11-03 01:43:17,207 INFO L226 Difference]: Without dead ends: 535 [2022-11-03 01:43:17,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:17,210 INFO L413 NwaCegarLoop]: 786 mSDtfsCounter, 114 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 2309 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:17,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 2309 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:43:17,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-11-03 01:43:17,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 526. [2022-11-03 01:43:17,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 411 states have (on average 1.6447688564476886) internal successors, (676), 426 states have internal predecessors, (676), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 01:43:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 857 transitions. [2022-11-03 01:43:17,233 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 857 transitions. Word has length 107 [2022-11-03 01:43:17,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:17,233 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 857 transitions. [2022-11-03 01:43:17,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:17,233 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 857 transitions. [2022-11-03 01:43:17,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 01:43:17,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:17,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:17,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:17,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:17,451 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:17,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:17,451 INFO L85 PathProgramCache]: Analyzing trace with hash -839334292, now seen corresponding path program 1 times [2022-11-03 01:43:17,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:17,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684626790] [2022-11-03 01:43:17,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:17,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:17,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:17,454 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:17,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 01:43:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:17,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:43:17,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:43:17,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:17,821 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:17,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684626790] [2022-11-03 01:43:17,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684626790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:17,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:17,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:17,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689976270] [2022-11-03 01:43:17,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:17,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:43:17,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:17,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:43:17,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:43:17,825 INFO L87 Difference]: Start difference. First operand 526 states and 857 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:18,003 INFO L93 Difference]: Finished difference Result 1001 states and 1634 transitions. [2022-11-03 01:43:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:43:18,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 108 [2022-11-03 01:43:18,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:18,008 INFO L225 Difference]: With dead ends: 1001 [2022-11-03 01:43:18,009 INFO L226 Difference]: Without dead ends: 526 [2022-11-03 01:43:18,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:18,012 INFO L413 NwaCegarLoop]: 789 mSDtfsCounter, 78 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2312 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:18,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 2312 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:18,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-11-03 01:43:18,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2022-11-03 01:43:18,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 411 states have (on average 1.635036496350365) internal successors, (672), 426 states have internal predecessors, (672), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 01:43:18,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 853 transitions. [2022-11-03 01:43:18,035 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 853 transitions. Word has length 108 [2022-11-03 01:43:18,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:18,036 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 853 transitions. [2022-11-03 01:43:18,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:18,036 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 853 transitions. [2022-11-03 01:43:18,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 01:43:18,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:18,040 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:18,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:18,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:18,264 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:18,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:18,264 INFO L85 PathProgramCache]: Analyzing trace with hash 168687912, now seen corresponding path program 1 times [2022-11-03 01:43:18,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:18,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328365993] [2022-11-03 01:43:18,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:18,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:18,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:18,267 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:18,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 01:43:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:18,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:43:18,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:18,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:43:18,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:18,627 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:18,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328365993] [2022-11-03 01:43:18,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328365993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:18,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:18,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:18,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762235089] [2022-11-03 01:43:18,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:18,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:43:18,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:18,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:43:18,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:43:18,629 INFO L87 Difference]: Start difference. First operand 526 states and 853 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:18,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:18,796 INFO L93 Difference]: Finished difference Result 1001 states and 1630 transitions. [2022-11-03 01:43:18,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:43:18,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 109 [2022-11-03 01:43:18,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:18,806 INFO L225 Difference]: With dead ends: 1001 [2022-11-03 01:43:18,806 INFO L226 Difference]: Without dead ends: 526 [2022-11-03 01:43:18,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:18,811 INFO L413 NwaCegarLoop]: 789 mSDtfsCounter, 73 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 2312 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:18,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 2312 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:18,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-11-03 01:43:18,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2022-11-03 01:43:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 411 states have (on average 1.6253041362530414) internal successors, (668), 426 states have internal predecessors, (668), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 01:43:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 849 transitions. [2022-11-03 01:43:18,832 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 849 transitions. Word has length 109 [2022-11-03 01:43:18,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:18,833 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 849 transitions. [2022-11-03 01:43:18,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:18,833 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 849 transitions. [2022-11-03 01:43:18,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 01:43:18,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:18,836 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:18,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:19,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:19,053 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:19,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:19,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1956894120, now seen corresponding path program 1 times [2022-11-03 01:43:19,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:19,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398539937] [2022-11-03 01:43:19,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:19,055 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:19,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:19,056 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:19,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 01:43:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:19,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:43:19,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:43:19,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:19,485 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:19,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398539937] [2022-11-03 01:43:19,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398539937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:19,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:19,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:43:19,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011352551] [2022-11-03 01:43:19,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:19,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:43:19,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:19,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:43:19,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:43:19,488 INFO L87 Difference]: Start difference. First operand 526 states and 849 transitions. Second operand has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:43:19,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:19,661 INFO L93 Difference]: Finished difference Result 1010 states and 1640 transitions. [2022-11-03 01:43:19,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:43:19,663 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 109 [2022-11-03 01:43:19,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:19,666 INFO L225 Difference]: With dead ends: 1010 [2022-11-03 01:43:19,667 INFO L226 Difference]: Without dead ends: 514 [2022-11-03 01:43:19,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:43:19,670 INFO L413 NwaCegarLoop]: 818 mSDtfsCounter, 107 mSDsluCounter, 3966 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 4784 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:19,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 4784 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:19,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-11-03 01:43:19,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 505. [2022-11-03 01:43:19,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 390 states have (on average 1.617948717948718) internal successors, (631), 405 states have internal predecessors, (631), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 01:43:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 812 transitions. [2022-11-03 01:43:19,694 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 812 transitions. Word has length 109 [2022-11-03 01:43:19,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:19,695 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 812 transitions. [2022-11-03 01:43:19,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:43:19,695 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 812 transitions. [2022-11-03 01:43:19,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 01:43:19,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:19,698 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:19,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:19,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:19,921 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:19,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:19,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1777705295, now seen corresponding path program 1 times [2022-11-03 01:43:19,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:19,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837838770] [2022-11-03 01:43:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:19,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:19,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:19,924 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:19,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 01:43:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:20,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:43:20,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:43:20,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:20,260 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:20,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837838770] [2022-11-03 01:43:20,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837838770] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:20,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:20,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:20,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277857770] [2022-11-03 01:43:20,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:20,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:43:20,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:20,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:43:20,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:43:20,262 INFO L87 Difference]: Start difference. First operand 505 states and 812 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:20,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:20,357 INFO L93 Difference]: Finished difference Result 980 states and 1589 transitions. [2022-11-03 01:43:20,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:43:20,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 110 [2022-11-03 01:43:20,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:20,362 INFO L225 Difference]: With dead ends: 980 [2022-11-03 01:43:20,362 INFO L226 Difference]: Without dead ends: 505 [2022-11-03 01:43:20,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:20,366 INFO L413 NwaCegarLoop]: 789 mSDtfsCounter, 41 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2312 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:20,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 2312 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:20,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-11-03 01:43:20,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 505. [2022-11-03 01:43:20,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 390 states have (on average 1.6153846153846154) internal successors, (630), 405 states have internal predecessors, (630), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 01:43:20,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 811 transitions. [2022-11-03 01:43:20,387 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 811 transitions. Word has length 110 [2022-11-03 01:43:20,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:20,387 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 811 transitions. [2022-11-03 01:43:20,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:20,388 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 811 transitions. [2022-11-03 01:43:20,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:43:20,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:20,391 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:20,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:20,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:20,607 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:20,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:20,607 INFO L85 PathProgramCache]: Analyzing trace with hash -821695731, now seen corresponding path program 1 times [2022-11-03 01:43:20,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:20,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034941947] [2022-11-03 01:43:20,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:20,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:20,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:20,610 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:20,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 01:43:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:20,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:43:20,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:43:20,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:20,983 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:20,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034941947] [2022-11-03 01:43:20,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034941947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:20,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:20,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:20,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941184665] [2022-11-03 01:43:20,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:20,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:43:20,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:20,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:43:20,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:43:20,985 INFO L87 Difference]: Start difference. First operand 505 states and 811 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:21,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:21,087 INFO L93 Difference]: Finished difference Result 980 states and 1588 transitions. [2022-11-03 01:43:21,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:43:21,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 111 [2022-11-03 01:43:21,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:21,094 INFO L225 Difference]: With dead ends: 980 [2022-11-03 01:43:21,094 INFO L226 Difference]: Without dead ends: 505 [2022-11-03 01:43:21,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:21,098 INFO L413 NwaCegarLoop]: 789 mSDtfsCounter, 39 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2312 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:21,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 2312 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:21,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-11-03 01:43:21,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 505. [2022-11-03 01:43:21,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 390 states have (on average 1.6128205128205129) internal successors, (629), 405 states have internal predecessors, (629), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 01:43:21,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 810 transitions. [2022-11-03 01:43:21,118 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 810 transitions. Word has length 111 [2022-11-03 01:43:21,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:21,118 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 810 transitions. [2022-11-03 01:43:21,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 01:43:21,119 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 810 transitions. [2022-11-03 01:43:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 01:43:21,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:21,122 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:21,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:21,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:21,345 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:21,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:21,345 INFO L85 PathProgramCache]: Analyzing trace with hash -85513482, now seen corresponding path program 1 times [2022-11-03 01:43:21,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:21,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516030299] [2022-11-03 01:43:21,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:21,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:21,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:21,347 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:21,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 01:43:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:21,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:43:21,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:43:21,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:21,758 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:21,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516030299] [2022-11-03 01:43:21,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516030299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:21,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:21,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:43:21,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434963400] [2022-11-03 01:43:21,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:21,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:43:21,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:21,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:43:21,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:43:21,761 INFO L87 Difference]: Start difference. First operand 505 states and 810 transitions. Second operand has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:43:22,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:22,006 INFO L93 Difference]: Finished difference Result 979 states and 1584 transitions. [2022-11-03 01:43:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:43:22,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2022-11-03 01:43:22,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:22,011 INFO L225 Difference]: With dead ends: 979 [2022-11-03 01:43:22,011 INFO L226 Difference]: Without dead ends: 510 [2022-11-03 01:43:22,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:43:22,015 INFO L413 NwaCegarLoop]: 767 mSDtfsCounter, 46 mSDsluCounter, 4566 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 5333 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:22,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 5333 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:43:22,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-11-03 01:43:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 507. [2022-11-03 01:43:22,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 392 states have (on average 1.6071428571428572) internal successors, (630), 407 states have internal predecessors, (630), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-03 01:43:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 811 transitions. [2022-11-03 01:43:22,045 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 811 transitions. Word has length 112 [2022-11-03 01:43:22,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:22,046 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 811 transitions. [2022-11-03 01:43:22,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:43:22,047 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 811 transitions. [2022-11-03 01:43:22,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 01:43:22,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:22,050 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:22,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:22,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:22,267 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:22,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:22,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1135066562, now seen corresponding path program 1 times [2022-11-03 01:43:22,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:22,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832828248] [2022-11-03 01:43:22,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:22,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:22,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:22,268 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:22,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 01:43:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:22,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:43:22,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 01:43:22,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:22,675 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:22,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832828248] [2022-11-03 01:43:22,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832828248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:22,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:22,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:22,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969561132] [2022-11-03 01:43:22,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:22,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:43:22,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:22,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:43:22,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:22,678 INFO L87 Difference]: Start difference. First operand 507 states and 811 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 01:43:23,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:23,557 INFO L93 Difference]: Finished difference Result 975 states and 1602 transitions. [2022-11-03 01:43:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:43:23,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 113 [2022-11-03 01:43:23,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:23,563 INFO L225 Difference]: With dead ends: 975 [2022-11-03 01:43:23,563 INFO L226 Difference]: Without dead ends: 511 [2022-11-03 01:43:23,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:43:23,567 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 743 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1944 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:23,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 1944 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:43:23,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-11-03 01:43:23,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2022-11-03 01:43:23,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 395 states have (on average 1.6025316455696204) internal successors, (633), 410 states have internal predecessors, (633), 91 states have call successors, (91), 25 states have call predecessors, (91), 24 states have return successors, (91), 88 states have call predecessors, (91), 90 states have call successors, (91) [2022-11-03 01:43:23,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 815 transitions. [2022-11-03 01:43:23,596 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 815 transitions. Word has length 113 [2022-11-03 01:43:23,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:23,597 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 815 transitions. [2022-11-03 01:43:23,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 01:43:23,597 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 815 transitions. [2022-11-03 01:43:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 01:43:23,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:23,600 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:23,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:23,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:23,826 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:23,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:23,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2061669059, now seen corresponding path program 1 times [2022-11-03 01:43:23,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:23,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075822997] [2022-11-03 01:43:23,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:23,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:23,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:23,828 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:23,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 01:43:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:24,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:43:24,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:43:24,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:24,250 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:24,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075822997] [2022-11-03 01:43:24,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075822997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:24,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:24,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:24,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900286868] [2022-11-03 01:43:24,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:24,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:43:24,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:24,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:43:24,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:24,252 INFO L87 Difference]: Start difference. First operand 511 states and 815 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 01:43:25,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:25,121 INFO L93 Difference]: Finished difference Result 984 states and 1609 transitions. [2022-11-03 01:43:25,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:43:25,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 116 [2022-11-03 01:43:25,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:25,125 INFO L225 Difference]: With dead ends: 984 [2022-11-03 01:43:25,125 INFO L226 Difference]: Without dead ends: 516 [2022-11-03 01:43:25,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:43:25,130 INFO L413 NwaCegarLoop]: 760 mSDtfsCounter, 728 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 1945 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:25,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 1945 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:43:25,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-11-03 01:43:25,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2022-11-03 01:43:25,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 399 states have (on average 1.5964912280701755) internal successors, (637), 414 states have internal predecessors, (637), 91 states have call successors, (91), 26 states have call predecessors, (91), 25 states have return successors, (92), 88 states have call predecessors, (92), 90 states have call successors, (92) [2022-11-03 01:43:25,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 820 transitions. [2022-11-03 01:43:25,166 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 820 transitions. Word has length 116 [2022-11-03 01:43:25,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:25,167 INFO L495 AbstractCegarLoop]: Abstraction has 516 states and 820 transitions. [2022-11-03 01:43:25,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 01:43:25,167 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 820 transitions. [2022-11-03 01:43:25,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-03 01:43:25,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:25,171 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:25,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:25,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:25,387 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:25,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:25,387 INFO L85 PathProgramCache]: Analyzing trace with hash -427684002, now seen corresponding path program 1 times [2022-11-03 01:43:25,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:25,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074763112] [2022-11-03 01:43:25,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:25,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:25,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:25,389 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:25,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 01:43:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:25,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:43:25,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 01:43:25,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:25,835 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:25,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074763112] [2022-11-03 01:43:25,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074763112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:25,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:25,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:25,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291315893] [2022-11-03 01:43:25,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:25,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:43:25,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:25,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:43:25,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:25,838 INFO L87 Difference]: Start difference. First operand 516 states and 820 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 01:43:26,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:26,735 INFO L93 Difference]: Finished difference Result 995 states and 1618 transitions. [2022-11-03 01:43:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:43:26,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 119 [2022-11-03 01:43:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:26,739 INFO L225 Difference]: With dead ends: 995 [2022-11-03 01:43:26,739 INFO L226 Difference]: Without dead ends: 522 [2022-11-03 01:43:26,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:43:26,743 INFO L413 NwaCegarLoop]: 760 mSDtfsCounter, 729 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 1945 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:26,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 1945 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:43:26,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-11-03 01:43:26,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 522. [2022-11-03 01:43:26,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 404 states have (on average 1.5891089108910892) internal successors, (642), 419 states have internal predecessors, (642), 91 states have call successors, (91), 27 states have call predecessors, (91), 26 states have return successors, (93), 88 states have call predecessors, (93), 90 states have call successors, (93) [2022-11-03 01:43:26,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 826 transitions. [2022-11-03 01:43:26,771 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 826 transitions. Word has length 119 [2022-11-03 01:43:26,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:26,772 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 826 transitions. [2022-11-03 01:43:26,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 01:43:26,772 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 826 transitions. [2022-11-03 01:43:26,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 01:43:26,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:26,775 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:26,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:26,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:26,992 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:26,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:26,993 INFO L85 PathProgramCache]: Analyzing trace with hash -33723247, now seen corresponding path program 1 times [2022-11-03 01:43:26,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:26,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226536458] [2022-11-03 01:43:26,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:26,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:26,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:26,995 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:27,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 01:43:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:27,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:43:27,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:43:27,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:27,448 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:27,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226536458] [2022-11-03 01:43:27,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226536458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:27,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:27,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:27,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092219278] [2022-11-03 01:43:27,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:27,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:43:27,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:27,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:43:27,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:27,453 INFO L87 Difference]: Start difference. First operand 522 states and 826 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 01:43:28,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:28,342 INFO L93 Difference]: Finished difference Result 1008 states and 1629 transitions. [2022-11-03 01:43:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:43:28,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 122 [2022-11-03 01:43:28,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:28,347 INFO L225 Difference]: With dead ends: 1008 [2022-11-03 01:43:28,347 INFO L226 Difference]: Without dead ends: 529 [2022-11-03 01:43:28,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:43:28,352 INFO L413 NwaCegarLoop]: 760 mSDtfsCounter, 741 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1945 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:28,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 1945 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:43:28,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-11-03 01:43:28,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2022-11-03 01:43:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 410 states have (on average 1.5804878048780489) internal successors, (648), 425 states have internal predecessors, (648), 91 states have call successors, (91), 28 states have call predecessors, (91), 27 states have return successors, (94), 88 states have call predecessors, (94), 90 states have call successors, (94) [2022-11-03 01:43:28,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 833 transitions. [2022-11-03 01:43:28,379 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 833 transitions. Word has length 122 [2022-11-03 01:43:28,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:28,379 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 833 transitions. [2022-11-03 01:43:28,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 01:43:28,380 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 833 transitions. [2022-11-03 01:43:28,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 01:43:28,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:28,383 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:28,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:28,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:28,605 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:28,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:28,605 INFO L85 PathProgramCache]: Analyzing trace with hash -517842182, now seen corresponding path program 1 times [2022-11-03 01:43:28,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:28,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422951160] [2022-11-03 01:43:28,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:28,606 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:28,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:28,607 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:28,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 01:43:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:28,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:43:28,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:43:29,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:29,084 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:29,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422951160] [2022-11-03 01:43:29,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422951160] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:29,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:29,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:43:29,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403079120] [2022-11-03 01:43:29,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:29,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:43:29,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:29,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:43:29,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:43:29,086 INFO L87 Difference]: Start difference. First operand 529 states and 833 transitions. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 01:43:36,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:36,971 INFO L93 Difference]: Finished difference Result 1797 states and 2908 transitions. [2022-11-03 01:43:36,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:43:36,979 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 125 [2022-11-03 01:43:36,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:36,995 INFO L225 Difference]: With dead ends: 1797 [2022-11-03 01:43:36,995 INFO L226 Difference]: Without dead ends: 1311 [2022-11-03 01:43:36,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:43:36,999 INFO L413 NwaCegarLoop]: 1396 mSDtfsCounter, 1568 mSDsluCounter, 3603 mSDsCounter, 0 mSdLazyCounter, 6120 mSolverCounterSat, 615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 4999 SdHoareTripleChecker+Invalid, 6735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 6120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:37,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1670 Valid, 4999 Invalid, 6735 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [615 Valid, 6120 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-11-03 01:43:37,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2022-11-03 01:43:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1089. [2022-11-03 01:43:37,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 822 states have (on average 1.583941605839416) internal successors, (1302), 859 states have internal predecessors, (1302), 208 states have call successors, (208), 53 states have call predecessors, (208), 58 states have return successors, (233), 207 states have call predecessors, (233), 206 states have call successors, (233) [2022-11-03 01:43:37,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1743 transitions. [2022-11-03 01:43:37,093 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1743 transitions. Word has length 125 [2022-11-03 01:43:37,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:37,093 INFO L495 AbstractCegarLoop]: Abstraction has 1089 states and 1743 transitions. [2022-11-03 01:43:37,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 01:43:37,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1743 transitions. [2022-11-03 01:43:37,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-03 01:43:37,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:37,099 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:37,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:37,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:37,316 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:37,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:37,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1816075832, now seen corresponding path program 1 times [2022-11-03 01:43:37,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:37,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551429250] [2022-11-03 01:43:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:37,317 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:37,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:37,318 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:37,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 01:43:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:37,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:43:37,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 01:43:37,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:37,713 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:37,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551429250] [2022-11-03 01:43:37,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551429250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:37,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:37,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:43:37,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321668612] [2022-11-03 01:43:37,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:37,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:43:37,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:37,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:43:37,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:43:37,716 INFO L87 Difference]: Start difference. First operand 1089 states and 1743 transitions. Second operand has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:43:37,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:37,986 INFO L93 Difference]: Finished difference Result 2105 states and 3392 transitions. [2022-11-03 01:43:37,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:43:37,988 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 128 [2022-11-03 01:43:37,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:37,996 INFO L225 Difference]: With dead ends: 2105 [2022-11-03 01:43:37,996 INFO L226 Difference]: Without dead ends: 1049 [2022-11-03 01:43:38,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:43:38,003 INFO L413 NwaCegarLoop]: 767 mSDtfsCounter, 58 mSDsluCounter, 4563 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 5330 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:38,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 5330 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:43:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2022-11-03 01:43:38,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1046. [2022-11-03 01:43:38,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 790 states have (on average 1.5911392405063292) internal successors, (1257), 826 states have internal predecessors, (1257), 202 states have call successors, (202), 50 states have call predecessors, (202), 53 states have return successors, (220), 200 states have call predecessors, (220), 200 states have call successors, (220) [2022-11-03 01:43:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1679 transitions. [2022-11-03 01:43:38,095 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1679 transitions. Word has length 128 [2022-11-03 01:43:38,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:38,095 INFO L495 AbstractCegarLoop]: Abstraction has 1046 states and 1679 transitions. [2022-11-03 01:43:38,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:43:38,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1679 transitions. [2022-11-03 01:43:38,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 01:43:38,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:38,099 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:38,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:38,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:38,318 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:38,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:38,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1895684408, now seen corresponding path program 1 times [2022-11-03 01:43:38,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:38,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087010982] [2022-11-03 01:43:38,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:38,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:38,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:38,321 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:38,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 01:43:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:38,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:43:38,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:43:38,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:38,817 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:38,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087010982] [2022-11-03 01:43:38,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087010982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:38,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:38,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:43:38,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112200065] [2022-11-03 01:43:38,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:38,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:43:38,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:38,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:43:38,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:43:38,819 INFO L87 Difference]: Start difference. First operand 1046 states and 1679 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 01:43:42,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:42,797 INFO L93 Difference]: Finished difference Result 2618 states and 4252 transitions. [2022-11-03 01:43:42,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:43:42,798 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 131 [2022-11-03 01:43:42,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:42,808 INFO L225 Difference]: With dead ends: 2618 [2022-11-03 01:43:42,808 INFO L226 Difference]: Without dead ends: 1612 [2022-11-03 01:43:42,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:43:42,816 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 1866 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1966 SdHoareTripleChecker+Valid, 1859 SdHoareTripleChecker+Invalid, 3018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:42,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1966 Valid, 1859 Invalid, 3018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 2532 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-03 01:43:42,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2022-11-03 01:43:42,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1571. [2022-11-03 01:43:42,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1176 states have (on average 1.594387755102041) internal successors, (1875), 1233 states have internal predecessors, (1875), 313 states have call successors, (313), 72 states have call predecessors, (313), 81 states have return successors, (356), 314 states have call predecessors, (356), 310 states have call successors, (356) [2022-11-03 01:43:42,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 2544 transitions. [2022-11-03 01:43:42,986 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 2544 transitions. Word has length 131 [2022-11-03 01:43:42,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:42,986 INFO L495 AbstractCegarLoop]: Abstraction has 1571 states and 2544 transitions. [2022-11-03 01:43:42,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 01:43:42,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 2544 transitions. [2022-11-03 01:43:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 01:43:42,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:42,990 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:43,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:43,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:43,202 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:43,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:43,203 INFO L85 PathProgramCache]: Analyzing trace with hash -2041019427, now seen corresponding path program 1 times [2022-11-03 01:43:43,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:43,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821842430] [2022-11-03 01:43:43,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:43,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:43,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:43,204 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:43,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 01:43:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:43,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:43:43,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:43:43,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:43,616 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:43,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821842430] [2022-11-03 01:43:43,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821842430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:43,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:43,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:43,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007835565] [2022-11-03 01:43:43,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:43,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:43:43,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:43,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:43:43,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:43,618 INFO L87 Difference]: Start difference. First operand 1571 states and 2544 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 01:43:44,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:44,701 INFO L93 Difference]: Finished difference Result 4491 states and 7339 transitions. [2022-11-03 01:43:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:43:44,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 132 [2022-11-03 01:43:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:44,722 INFO L225 Difference]: With dead ends: 4491 [2022-11-03 01:43:44,722 INFO L226 Difference]: Without dead ends: 2960 [2022-11-03 01:43:44,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:43:44,732 INFO L413 NwaCegarLoop]: 920 mSDtfsCounter, 626 mSDsluCounter, 1909 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 2829 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:44,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [636 Valid, 2829 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 01:43:44,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2022-11-03 01:43:44,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2945. [2022-11-03 01:43:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2945 states, 2186 states have (on average 1.571363220494053) internal successors, (3435), 2296 states have internal predecessors, (3435), 604 states have call successors, (604), 144 states have call predecessors, (604), 154 states have return successors, (683), 599 states have call predecessors, (683), 598 states have call successors, (683) [2022-11-03 01:43:45,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2945 states to 2945 states and 4722 transitions. [2022-11-03 01:43:45,029 INFO L78 Accepts]: Start accepts. Automaton has 2945 states and 4722 transitions. Word has length 132 [2022-11-03 01:43:45,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:45,029 INFO L495 AbstractCegarLoop]: Abstraction has 2945 states and 4722 transitions. [2022-11-03 01:43:45,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 01:43:45,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2945 states and 4722 transitions. [2022-11-03 01:43:45,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 01:43:45,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:45,034 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:45,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:45,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:45,252 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:45,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1072544168, now seen corresponding path program 1 times [2022-11-03 01:43:45,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:45,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931592065] [2022-11-03 01:43:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:45,253 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:45,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:45,254 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:45,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 01:43:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:45,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:43:45,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:43:45,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:45,749 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:45,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931592065] [2022-11-03 01:43:45,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931592065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:45,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:45,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:43:45,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736632387] [2022-11-03 01:43:45,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:45,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:43:45,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:45,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:43:45,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:45,754 INFO L87 Difference]: Start difference. First operand 2945 states and 4722 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 01:43:46,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:46,968 INFO L93 Difference]: Finished difference Result 8694 states and 14119 transitions. [2022-11-03 01:43:46,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:43:46,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 134 [2022-11-03 01:43:46,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:46,996 INFO L225 Difference]: With dead ends: 8694 [2022-11-03 01:43:46,996 INFO L226 Difference]: Without dead ends: 5789 [2022-11-03 01:43:47,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:43:47,008 INFO L413 NwaCegarLoop]: 950 mSDtfsCounter, 736 mSDsluCounter, 1920 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 2870 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:47,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 2870 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:43:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5789 states. [2022-11-03 01:43:47,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5789 to 5763. [2022-11-03 01:43:47,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5763 states, 4278 states have (on average 1.5691912108461898) internal successors, (6713), 4497 states have internal predecessors, (6713), 1179 states have call successors, (1179), 285 states have call predecessors, (1179), 305 states have return successors, (1448), 1170 states have call predecessors, (1448), 1167 states have call successors, (1448) [2022-11-03 01:43:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5763 states to 5763 states and 9340 transitions. [2022-11-03 01:43:47,623 INFO L78 Accepts]: Start accepts. Automaton has 5763 states and 9340 transitions. Word has length 134 [2022-11-03 01:43:47,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:47,623 INFO L495 AbstractCegarLoop]: Abstraction has 5763 states and 9340 transitions. [2022-11-03 01:43:47,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 01:43:47,624 INFO L276 IsEmpty]: Start isEmpty. Operand 5763 states and 9340 transitions. [2022-11-03 01:43:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 01:43:47,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:47,627 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:47,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:47,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:47,845 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:47,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:47,846 INFO L85 PathProgramCache]: Analyzing trace with hash 708955767, now seen corresponding path program 1 times [2022-11-03 01:43:47,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:47,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091102477] [2022-11-03 01:43:47,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:47,846 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:47,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:47,847 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:47,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 01:43:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:48,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:43:48,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:43:48,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:48,270 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:48,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091102477] [2022-11-03 01:43:48,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091102477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:48,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:48,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:43:48,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705855845] [2022-11-03 01:43:48,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:48,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:43:48,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:48,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:43:48,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:43:48,272 INFO L87 Difference]: Start difference. First operand 5763 states and 9340 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 01:43:48,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:48,945 INFO L93 Difference]: Finished difference Result 10344 states and 16400 transitions. [2022-11-03 01:43:48,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:43:48,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 134 [2022-11-03 01:43:48,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:48,997 INFO L225 Difference]: With dead ends: 10344 [2022-11-03 01:43:48,997 INFO L226 Difference]: Without dead ends: 6637 [2022-11-03 01:43:49,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:43:49,021 INFO L413 NwaCegarLoop]: 912 mSDtfsCounter, 508 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:49,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 1305 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:43:49,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6637 states. [2022-11-03 01:43:49,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6637 to 6611. [2022-11-03 01:43:49,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6611 states, 4931 states have (on average 1.5270736158994118) internal successors, (7530), 5148 states have internal predecessors, (7530), 1275 states have call successors, (1275), 372 states have call predecessors, (1275), 404 states have return successors, (1647), 1274 states have call predecessors, (1647), 1257 states have call successors, (1647) [2022-11-03 01:43:49,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6611 states to 6611 states and 10452 transitions. [2022-11-03 01:43:49,868 INFO L78 Accepts]: Start accepts. Automaton has 6611 states and 10452 transitions. Word has length 134 [2022-11-03 01:43:49,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:49,869 INFO L495 AbstractCegarLoop]: Abstraction has 6611 states and 10452 transitions. [2022-11-03 01:43:49,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 01:43:49,869 INFO L276 IsEmpty]: Start isEmpty. Operand 6611 states and 10452 transitions. [2022-11-03 01:43:49,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 01:43:49,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:49,872 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:49,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:50,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:50,072 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:50,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:50,073 INFO L85 PathProgramCache]: Analyzing trace with hash 507131833, now seen corresponding path program 1 times [2022-11-03 01:43:50,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:50,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211722855] [2022-11-03 01:43:50,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:50,074 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:50,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:50,075 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:50,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 01:43:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:50,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:43:50,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:43:50,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:50,580 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:50,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211722855] [2022-11-03 01:43:50,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211722855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:50,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:50,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:43:50,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413243272] [2022-11-03 01:43:50,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:50,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:43:50,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:50,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:43:50,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:43:50,582 INFO L87 Difference]: Start difference. First operand 6611 states and 10452 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 01:43:52,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:52,674 INFO L93 Difference]: Finished difference Result 15325 states and 24382 transitions. [2022-11-03 01:43:52,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:43:52,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 134 [2022-11-03 01:43:52,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:52,754 INFO L225 Difference]: With dead ends: 15325 [2022-11-03 01:43:52,754 INFO L226 Difference]: Without dead ends: 10974 [2022-11-03 01:43:52,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:43:52,791 INFO L413 NwaCegarLoop]: 855 mSDtfsCounter, 903 mSDsluCounter, 2561 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 3416 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:52,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 3416 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 01:43:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10974 states. [2022-11-03 01:43:53,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10974 to 10894. [2022-11-03 01:43:53,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10894 states, 8180 states have (on average 1.5189486552567237) internal successors, (12425), 8513 states have internal predecessors, (12425), 2012 states have call successors, (2012), 621 states have call predecessors, (2012), 701 states have return successors, (2796), 2035 states have call predecessors, (2796), 1982 states have call successors, (2796) [2022-11-03 01:43:54,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10894 states to 10894 states and 17233 transitions. [2022-11-03 01:43:54,069 INFO L78 Accepts]: Start accepts. Automaton has 10894 states and 17233 transitions. Word has length 134 [2022-11-03 01:43:54,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:54,070 INFO L495 AbstractCegarLoop]: Abstraction has 10894 states and 17233 transitions. [2022-11-03 01:43:54,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 01:43:54,070 INFO L276 IsEmpty]: Start isEmpty. Operand 10894 states and 17233 transitions. [2022-11-03 01:43:54,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 01:43:54,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:54,074 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:54,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:54,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:43:54,286 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:54,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:54,287 INFO L85 PathProgramCache]: Analyzing trace with hash 292185497, now seen corresponding path program 1 times [2022-11-03 01:43:54,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:54,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855444] [2022-11-03 01:43:54,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:54,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:54,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:54,290 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:54,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 01:43:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:54,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:43:54,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:43:54,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:54,848 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:43:54,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855444] [2022-11-03 01:43:54,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:54,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:54,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:43:54,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512178564] [2022-11-03 01:43:54,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:54,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:43:54,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:43:54,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:43:54,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:43:54,849 INFO L87 Difference]: Start difference. First operand 10894 states and 17233 transitions. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:44:00,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:00,848 INFO L93 Difference]: Finished difference Result 19544 states and 31085 transitions. [2022-11-03 01:44:00,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:44:00,850 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 136 [2022-11-03 01:44:00,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:00,928 INFO L225 Difference]: With dead ends: 19544 [2022-11-03 01:44:00,928 INFO L226 Difference]: Without dead ends: 11084 [2022-11-03 01:44:00,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:44:00,982 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 1924 mSDsluCounter, 1783 mSDsCounter, 0 mSdLazyCounter, 3684 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2026 SdHoareTripleChecker+Valid, 2535 SdHoareTripleChecker+Invalid, 4156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 3684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:00,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2026 Valid, 2535 Invalid, 4156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 3684 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-03 01:44:00,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11084 states. [2022-11-03 01:44:02,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11084 to 10834. [2022-11-03 01:44:02,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10834 states, 8146 states have (on average 1.5191505033145103) internal successors, (12375), 8477 states have internal predecessors, (12375), 1996 states have call successors, (1996), 613 states have call predecessors, (1996), 691 states have return successors, (2776), 2019 states have call predecessors, (2776), 1966 states have call successors, (2776) [2022-11-03 01:44:02,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10834 states to 10834 states and 17147 transitions. [2022-11-03 01:44:02,363 INFO L78 Accepts]: Start accepts. Automaton has 10834 states and 17147 transitions. Word has length 136 [2022-11-03 01:44:02,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:02,364 INFO L495 AbstractCegarLoop]: Abstraction has 10834 states and 17147 transitions. [2022-11-03 01:44:02,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 01:44:02,365 INFO L276 IsEmpty]: Start isEmpty. Operand 10834 states and 17147 transitions. [2022-11-03 01:44:02,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-03 01:44:02,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:02,369 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:02,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:02,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:44:02,583 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:02,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:02,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1577666288, now seen corresponding path program 1 times [2022-11-03 01:44:02,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:02,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828585029] [2022-11-03 01:44:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:02,584 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:02,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:02,586 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:02,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 01:44:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:02,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:44:02,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:44:03,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:03,252 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:03,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828585029] [2022-11-03 01:44:03,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828585029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:03,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:03,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:44:03,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168814808] [2022-11-03 01:44:03,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:03,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:44:03,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:03,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:44:03,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:44:03,255 INFO L87 Difference]: Start difference. First operand 10834 states and 17147 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 01:44:05,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:05,279 INFO L93 Difference]: Finished difference Result 19456 states and 30783 transitions. [2022-11-03 01:44:05,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:44:05,280 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 139 [2022-11-03 01:44:05,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:05,363 INFO L225 Difference]: With dead ends: 19456 [2022-11-03 01:44:05,363 INFO L226 Difference]: Without dead ends: 10882 [2022-11-03 01:44:05,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:44:05,586 INFO L413 NwaCegarLoop]: 938 mSDtfsCounter, 647 mSDsluCounter, 2381 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 3319 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:05,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 3319 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 01:44:05,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10882 states. [2022-11-03 01:44:06,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10882 to 10852. [2022-11-03 01:44:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10852 states, 8158 states have (on average 1.5169159107624417) internal successors, (12375), 8495 states have internal predecessors, (12375), 1996 states have call successors, (1996), 613 states have call predecessors, (1996), 697 states have return successors, (2782), 2019 states have call predecessors, (2782), 1966 states have call successors, (2782) [2022-11-03 01:44:06,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10852 states to 10852 states and 17153 transitions. [2022-11-03 01:44:06,499 INFO L78 Accepts]: Start accepts. Automaton has 10852 states and 17153 transitions. Word has length 139 [2022-11-03 01:44:06,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:06,499 INFO L495 AbstractCegarLoop]: Abstraction has 10852 states and 17153 transitions. [2022-11-03 01:44:06,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 01:44:06,500 INFO L276 IsEmpty]: Start isEmpty. Operand 10852 states and 17153 transitions. [2022-11-03 01:44:06,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 01:44:06,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:06,503 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:06,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:06,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:44:06,718 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:06,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:06,718 INFO L85 PathProgramCache]: Analyzing trace with hash -471256228, now seen corresponding path program 1 times [2022-11-03 01:44:06,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:06,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532069217] [2022-11-03 01:44:06,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:06,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:06,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:06,720 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:06,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 01:44:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:06,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:44:06,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:44:07,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:07,050 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:07,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532069217] [2022-11-03 01:44:07,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532069217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:07,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:07,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:44:07,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067653876] [2022-11-03 01:44:07,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:07,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:44:07,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:07,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:44:07,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:44:07,054 INFO L87 Difference]: Start difference. First operand 10852 states and 17153 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 01:44:08,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:08,202 INFO L93 Difference]: Finished difference Result 20316 states and 32475 transitions. [2022-11-03 01:44:08,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:44:08,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 146 [2022-11-03 01:44:08,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:08,279 INFO L225 Difference]: With dead ends: 20316 [2022-11-03 01:44:08,280 INFO L226 Difference]: Without dead ends: 10866 [2022-11-03 01:44:08,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:44:08,351 INFO L413 NwaCegarLoop]: 822 mSDtfsCounter, 404 mSDsluCounter, 2013 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 2835 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:08,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 2835 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:44:08,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10866 states. [2022-11-03 01:44:09,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10866 to 10854. [2022-11-03 01:44:09,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10854 states, 8159 states have (on average 1.496261796788822) internal successors, (12208), 8497 states have internal predecessors, (12208), 1996 states have call successors, (1996), 613 states have call predecessors, (1996), 698 states have return successors, (2784), 2019 states have call predecessors, (2784), 1966 states have call successors, (2784) [2022-11-03 01:44:09,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10854 states to 10854 states and 16988 transitions. [2022-11-03 01:44:09,729 INFO L78 Accepts]: Start accepts. Automaton has 10854 states and 16988 transitions. Word has length 146 [2022-11-03 01:44:09,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:09,730 INFO L495 AbstractCegarLoop]: Abstraction has 10854 states and 16988 transitions. [2022-11-03 01:44:09,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 01:44:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 10854 states and 16988 transitions. [2022-11-03 01:44:09,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-03 01:44:09,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:09,735 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:09,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:09,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:44:09,952 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:09,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:09,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1516062679, now seen corresponding path program 1 times [2022-11-03 01:44:09,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:09,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743818548] [2022-11-03 01:44:09,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:09,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:09,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:09,955 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:09,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 01:44:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:10,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:44:10,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 01:44:10,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:10,451 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:10,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743818548] [2022-11-03 01:44:10,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743818548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:10,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:10,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:44:10,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128284890] [2022-11-03 01:44:10,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:10,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:44:10,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:10,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:44:10,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:44:10,453 INFO L87 Difference]: Start difference. First operand 10854 states and 16988 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:44:11,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:11,851 INFO L93 Difference]: Finished difference Result 19088 states and 30201 transitions. [2022-11-03 01:44:11,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:44:11,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 151 [2022-11-03 01:44:11,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:11,919 INFO L225 Difference]: With dead ends: 19088 [2022-11-03 01:44:11,919 INFO L226 Difference]: Without dead ends: 11000 [2022-11-03 01:44:11,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:44:11,973 INFO L413 NwaCegarLoop]: 866 mSDtfsCounter, 691 mSDsluCounter, 2277 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 3143 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:11,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 3143 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:44:11,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11000 states. [2022-11-03 01:44:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11000 to 10938. [2022-11-03 01:44:12,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10938 states, 8207 states have (on average 1.493359327403436) internal successors, (12256), 8569 states have internal predecessors, (12256), 2020 states have call successors, (2020), 625 states have call predecessors, (2020), 710 states have return successors, (2886), 2019 states have call predecessors, (2886), 1990 states have call successors, (2886) [2022-11-03 01:44:13,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10938 states to 10938 states and 17162 transitions. [2022-11-03 01:44:13,053 INFO L78 Accepts]: Start accepts. Automaton has 10938 states and 17162 transitions. Word has length 151 [2022-11-03 01:44:13,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:13,053 INFO L495 AbstractCegarLoop]: Abstraction has 10938 states and 17162 transitions. [2022-11-03 01:44:13,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 01:44:13,054 INFO L276 IsEmpty]: Start isEmpty. Operand 10938 states and 17162 transitions. [2022-11-03 01:44:13,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-03 01:44:13,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:13,058 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:13,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-03 01:44:13,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:44:13,264 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:13,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:13,264 INFO L85 PathProgramCache]: Analyzing trace with hash 488498054, now seen corresponding path program 1 times [2022-11-03 01:44:13,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:13,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997319048] [2022-11-03 01:44:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:13,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:13,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:13,266 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:13,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 01:44:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:13,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:44:13,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 01:44:13,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-03 01:44:14,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:14,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997319048] [2022-11-03 01:44:14,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997319048] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:14,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:44:14,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2022-11-03 01:44:14,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191759520] [2022-11-03 01:44:14,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:14,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:44:14,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:14,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:44:14,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:44:14,383 INFO L87 Difference]: Start difference. First operand 10938 states and 17162 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 01:44:19,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:19,743 INFO L93 Difference]: Finished difference Result 21586 states and 34422 transitions. [2022-11-03 01:44:19,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:44:19,744 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 156 [2022-11-03 01:44:19,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:19,810 INFO L225 Difference]: With dead ends: 21586 [2022-11-03 01:44:19,810 INFO L226 Difference]: Without dead ends: 13410 [2022-11-03 01:44:19,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:44:19,863 INFO L413 NwaCegarLoop]: 910 mSDtfsCounter, 1465 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 2587 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1548 SdHoareTripleChecker+Valid, 2507 SdHoareTripleChecker+Invalid, 2760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 2587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:19,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1548 Valid, 2507 Invalid, 2760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 2587 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 01:44:19,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13410 states. [2022-11-03 01:44:21,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13410 to 12414. [2022-11-03 01:44:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12414 states, 9384 states have (on average 1.4888107416879794) internal successors, (13971), 9771 states have internal predecessors, (13971), 2188 states have call successors, (2188), 749 states have call predecessors, (2188), 841 states have return successors, (3187), 2169 states have call predecessors, (3187), 2158 states have call successors, (3187) [2022-11-03 01:44:21,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12414 states to 12414 states and 19346 transitions. [2022-11-03 01:44:21,347 INFO L78 Accepts]: Start accepts. Automaton has 12414 states and 19346 transitions. Word has length 156 [2022-11-03 01:44:21,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:21,347 INFO L495 AbstractCegarLoop]: Abstraction has 12414 states and 19346 transitions. [2022-11-03 01:44:21,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 01:44:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 12414 states and 19346 transitions. [2022-11-03 01:44:21,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-03 01:44:21,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:21,350 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:21,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-03 01:44:21,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:44:21,550 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:21,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:21,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1190097928, now seen corresponding path program 1 times [2022-11-03 01:44:21,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:21,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629386721] [2022-11-03 01:44:21,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:21,551 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:21,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:21,552 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:21,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 01:44:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:21,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:44:21,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-03 01:44:22,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:22,107 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:22,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629386721] [2022-11-03 01:44:22,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629386721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:22,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:22,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:44:22,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123740189] [2022-11-03 01:44:22,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:22,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:44:22,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:22,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:44:22,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:44:22,109 INFO L87 Difference]: Start difference. First operand 12414 states and 19346 transitions. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 7 states have internal predecessors, (98), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 01:44:27,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:27,648 INFO L93 Difference]: Finished difference Result 24794 states and 39246 transitions. [2022-11-03 01:44:27,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:44:27,650 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 7 states have internal predecessors, (98), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) Word has length 156 [2022-11-03 01:44:27,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:27,720 INFO L225 Difference]: With dead ends: 24794 [2022-11-03 01:44:27,720 INFO L226 Difference]: Without dead ends: 6922 [2022-11-03 01:44:27,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:44:27,857 INFO L413 NwaCegarLoop]: 742 mSDtfsCounter, 1703 mSDsluCounter, 1931 mSDsCounter, 0 mSdLazyCounter, 3578 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1804 SdHoareTripleChecker+Valid, 2673 SdHoareTripleChecker+Invalid, 4029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 3578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:27,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1804 Valid, 2673 Invalid, 4029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 3578 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-03 01:44:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6922 states. [2022-11-03 01:44:28,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6922 to 6846. [2022-11-03 01:44:28,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6846 states, 5291 states have (on average 1.501984501984502) internal successors, (7947), 5491 states have internal predecessors, (7947), 1087 states have call successors, (1087), 436 states have call predecessors, (1087), 467 states have return successors, (1480), 1055 states have call predecessors, (1480), 1077 states have call successors, (1480) [2022-11-03 01:44:28,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6846 states to 6846 states and 10514 transitions. [2022-11-03 01:44:28,387 INFO L78 Accepts]: Start accepts. Automaton has 6846 states and 10514 transitions. Word has length 156 [2022-11-03 01:44:28,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:28,387 INFO L495 AbstractCegarLoop]: Abstraction has 6846 states and 10514 transitions. [2022-11-03 01:44:28,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 7 states have internal predecessors, (98), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 01:44:28,388 INFO L276 IsEmpty]: Start isEmpty. Operand 6846 states and 10514 transitions. [2022-11-03 01:44:28,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-11-03 01:44:28,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:28,406 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 13, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:28,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:28,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:44:28,625 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:28,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:28,626 INFO L85 PathProgramCache]: Analyzing trace with hash 593515206, now seen corresponding path program 1 times [2022-11-03 01:44:28,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:28,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553997681] [2022-11-03 01:44:28,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:28,627 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:28,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:28,628 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:28,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 01:44:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:29,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 1747 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:44:29,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2022-11-03 01:44:29,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:29,358 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:29,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553997681] [2022-11-03 01:44:29,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553997681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:29,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:29,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:44:29,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915632051] [2022-11-03 01:44:29,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:29,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:44:29,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:29,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:44:29,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:44:29,361 INFO L87 Difference]: Start difference. First operand 6846 states and 10514 transitions. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-03 01:44:30,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:30,091 INFO L93 Difference]: Finished difference Result 13766 states and 21463 transitions. [2022-11-03 01:44:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:44:30,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) Word has length 483 [2022-11-03 01:44:30,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:30,133 INFO L225 Difference]: With dead ends: 13766 [2022-11-03 01:44:30,134 INFO L226 Difference]: Without dead ends: 7317 [2022-11-03 01:44:30,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:44:30,164 INFO L413 NwaCegarLoop]: 785 mSDtfsCounter, 74 mSDsluCounter, 3091 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 3876 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:30,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 3876 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:44:30,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7317 states. [2022-11-03 01:44:31,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7317 to 6931. [2022-11-03 01:44:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6931 states, 5359 states have (on average 1.4956148535174474) internal successors, (8015), 5559 states have internal predecessors, (8015), 1087 states have call successors, (1087), 436 states have call predecessors, (1087), 484 states have return successors, (1507), 1072 states have call predecessors, (1507), 1077 states have call successors, (1507) [2022-11-03 01:44:31,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6931 states to 6931 states and 10609 transitions. [2022-11-03 01:44:31,066 INFO L78 Accepts]: Start accepts. Automaton has 6931 states and 10609 transitions. Word has length 483 [2022-11-03 01:44:31,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:31,066 INFO L495 AbstractCegarLoop]: Abstraction has 6931 states and 10609 transitions. [2022-11-03 01:44:31,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-03 01:44:31,067 INFO L276 IsEmpty]: Start isEmpty. Operand 6931 states and 10609 transitions. [2022-11-03 01:44:31,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2022-11-03 01:44:31,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:31,078 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 13, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:31,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-03 01:44:31,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:44:31,287 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:31,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:31,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1121040414, now seen corresponding path program 1 times [2022-11-03 01:44:31,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:31,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844002897] [2022-11-03 01:44:31,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:31,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:31,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:31,289 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:31,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 01:44:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:31,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 1749 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:44:31,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 397 proven. 0 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2022-11-03 01:44:32,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:32,325 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:32,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844002897] [2022-11-03 01:44:32,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844002897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:32,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:32,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:44:32,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634851224] [2022-11-03 01:44:32,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:32,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:44:32,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:32,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:44:32,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:44:32,327 INFO L87 Difference]: Start difference. First operand 6931 states and 10609 transitions. Second operand has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 states have internal predecessors, (196), 6 states have call successors, (38), 5 states have call predecessors, (38), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2022-11-03 01:44:37,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:37,742 INFO L93 Difference]: Finished difference Result 18677 states and 29206 transitions. [2022-11-03 01:44:37,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:44:37,744 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 states have internal predecessors, (196), 6 states have call successors, (38), 5 states have call predecessors, (38), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 485 [2022-11-03 01:44:37,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:37,789 INFO L225 Difference]: With dead ends: 18677 [2022-11-03 01:44:37,789 INFO L226 Difference]: Without dead ends: 11687 [2022-11-03 01:44:37,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:44:37,820 INFO L413 NwaCegarLoop]: 1269 mSDtfsCounter, 2295 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 3280 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2454 SdHoareTripleChecker+Valid, 2379 SdHoareTripleChecker+Invalid, 3916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 3280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:37,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2454 Valid, 2379 Invalid, 3916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 3280 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-03 01:44:37,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11687 states. [2022-11-03 01:44:38,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11687 to 11230. [2022-11-03 01:44:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11230 states, 8596 states have (on average 1.481037691949744) internal successors, (12731), 8929 states have internal predecessors, (12731), 1801 states have call successors, (1801), 756 states have call predecessors, (1801), 832 states have return successors, (2684), 1763 states have call predecessors, (2684), 1787 states have call successors, (2684) [2022-11-03 01:44:38,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11230 states to 11230 states and 17216 transitions. [2022-11-03 01:44:38,787 INFO L78 Accepts]: Start accepts. Automaton has 11230 states and 17216 transitions. Word has length 485 [2022-11-03 01:44:38,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:38,788 INFO L495 AbstractCegarLoop]: Abstraction has 11230 states and 17216 transitions. [2022-11-03 01:44:38,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 states have internal predecessors, (196), 6 states have call successors, (38), 5 states have call predecessors, (38), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2022-11-03 01:44:38,788 INFO L276 IsEmpty]: Start isEmpty. Operand 11230 states and 17216 transitions. [2022-11-03 01:44:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2022-11-03 01:44:38,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:38,810 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 14, 12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:38,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:39,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:44:39,011 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:39,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:39,011 INFO L85 PathProgramCache]: Analyzing trace with hash 802576254, now seen corresponding path program 1 times [2022-11-03 01:44:39,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:39,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235676429] [2022-11-03 01:44:39,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:39,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:39,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:39,014 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:39,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 01:44:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:39,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1706 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:44:39,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1383 backedges. 726 proven. 0 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2022-11-03 01:44:39,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:39,754 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:39,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235676429] [2022-11-03 01:44:39,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235676429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:39,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:39,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:44:39,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577505045] [2022-11-03 01:44:39,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:39,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:44:39,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:39,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:44:39,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:44:39,757 INFO L87 Difference]: Start difference. First operand 11230 states and 17216 transitions. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-03 01:44:41,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:41,057 INFO L93 Difference]: Finished difference Result 23157 states and 36013 transitions. [2022-11-03 01:44:41,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:44:41,058 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) Word has length 457 [2022-11-03 01:44:41,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:41,107 INFO L225 Difference]: With dead ends: 23157 [2022-11-03 01:44:41,107 INFO L226 Difference]: Without dead ends: 12205 [2022-11-03 01:44:41,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:44:41,146 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 165 mSDsluCounter, 3226 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 4066 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:41,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 4066 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:44:41,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12205 states. [2022-11-03 01:44:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12205 to 11370. [2022-11-03 01:44:41,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11370 states, 8618 states have (on average 1.4810860988628451) internal successors, (12764), 9006 states have internal predecessors, (12764), 1937 states have call successors, (1937), 730 states have call predecessors, (1937), 814 states have return successors, (2812), 1900 states have call predecessors, (2812), 1923 states have call successors, (2812) [2022-11-03 01:44:42,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11370 states to 11370 states and 17513 transitions. [2022-11-03 01:44:42,048 INFO L78 Accepts]: Start accepts. Automaton has 11370 states and 17513 transitions. Word has length 457 [2022-11-03 01:44:42,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:42,048 INFO L495 AbstractCegarLoop]: Abstraction has 11370 states and 17513 transitions. [2022-11-03 01:44:42,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-03 01:44:42,049 INFO L276 IsEmpty]: Start isEmpty. Operand 11370 states and 17513 transitions. [2022-11-03 01:44:42,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2022-11-03 01:44:42,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:42,065 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:42,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:42,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:44:42,266 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:42,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:42,267 INFO L85 PathProgramCache]: Analyzing trace with hash -607331742, now seen corresponding path program 1 times [2022-11-03 01:44:42,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:42,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503412478] [2022-11-03 01:44:42,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:42,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:42,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:42,269 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:42,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 01:44:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:42,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 1713 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:44:42,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 798 proven. 29 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-11-03 01:44:43,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 70 proven. 116 refuted. 0 times theorem prover too weak. 1191 trivial. 0 not checked. [2022-11-03 01:44:44,176 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:44,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503412478] [2022-11-03 01:44:44,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503412478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:44,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1441902095] [2022-11-03 01:44:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:44,177 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:44:44,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:44:44,182 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:44:44,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 01:44:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:44,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 1713 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:44:44,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 735 proven. 0 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2022-11-03 01:44:44,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:44,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1441902095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:44,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:44:44,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 11] total 17 [2022-11-03 01:44:44,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815179811] [2022-11-03 01:44:44,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:44,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:44:44,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:44,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:44:44,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:44:44,854 INFO L87 Difference]: Start difference. First operand 11370 states and 17513 transitions. Second operand has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-03 01:44:46,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:46,925 INFO L93 Difference]: Finished difference Result 25099 states and 38972 transitions. [2022-11-03 01:44:46,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:44:46,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) Word has length 460 [2022-11-03 01:44:46,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:46,981 INFO L225 Difference]: With dead ends: 25099 [2022-11-03 01:44:46,981 INFO L226 Difference]: Without dead ends: 13853 [2022-11-03 01:44:47,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1383 GetRequests, 1364 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:44:47,029 INFO L413 NwaCegarLoop]: 1186 mSDtfsCounter, 646 mSDsluCounter, 3962 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 5148 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:47,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 5148 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:44:47,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13853 states. [2022-11-03 01:44:47,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13853 to 12852. [2022-11-03 01:44:47,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12852 states, 9706 states have (on average 1.4893880074180919) internal successors, (14456), 10163 states have internal predecessors, (14456), 2259 states have call successors, (2259), 793 states have call predecessors, (2259), 886 states have return successors, (3251), 2234 states have call predecessors, (3251), 2245 states have call successors, (3251) [2022-11-03 01:44:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12852 states to 12852 states and 19966 transitions. [2022-11-03 01:44:48,061 INFO L78 Accepts]: Start accepts. Automaton has 12852 states and 19966 transitions. Word has length 460 [2022-11-03 01:44:48,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:48,061 INFO L495 AbstractCegarLoop]: Abstraction has 12852 states and 19966 transitions. [2022-11-03 01:44:48,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-03 01:44:48,062 INFO L276 IsEmpty]: Start isEmpty. Operand 12852 states and 19966 transitions. [2022-11-03 01:44:48,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2022-11-03 01:44:48,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:48,085 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:48,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-03 01:44:48,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:48,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:44:48,491 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:48,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:48,491 INFO L85 PathProgramCache]: Analyzing trace with hash 939727168, now seen corresponding path program 2 times [2022-11-03 01:44:48,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:48,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580874010] [2022-11-03 01:44:48,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:44:48,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:48,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:48,493 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:48,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 01:44:48,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-03 01:44:48,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:44:48,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:44:48,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 503 proven. 0 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2022-11-03 01:44:48,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:48,916 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:48,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580874010] [2022-11-03 01:44:48,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580874010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:48,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:48,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:44:48,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063070089] [2022-11-03 01:44:48,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:48,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:44:48,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:48,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:44:48,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:44:48,918 INFO L87 Difference]: Start difference. First operand 12852 states and 19966 transitions. Second operand has 7 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 3 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-03 01:44:50,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:50,336 INFO L93 Difference]: Finished difference Result 22040 states and 34386 transitions. [2022-11-03 01:44:50,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:44:50,338 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 3 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 462 [2022-11-03 01:44:50,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:50,393 INFO L225 Difference]: With dead ends: 22040 [2022-11-03 01:44:50,393 INFO L226 Difference]: Without dead ends: 12838 [2022-11-03 01:44:50,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:44:50,434 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 45 mSDsluCounter, 3766 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 4528 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:50,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 4528 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:44:50,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12838 states. [2022-11-03 01:44:51,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12838 to 12838. [2022-11-03 01:44:51,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12838 states, 9692 states have (on average 1.4886504333470905) internal successors, (14428), 10149 states have internal predecessors, (14428), 2259 states have call successors, (2259), 793 states have call predecessors, (2259), 886 states have return successors, (3251), 2234 states have call predecessors, (3251), 2245 states have call successors, (3251) [2022-11-03 01:44:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12838 states to 12838 states and 19938 transitions. [2022-11-03 01:44:51,389 INFO L78 Accepts]: Start accepts. Automaton has 12838 states and 19938 transitions. Word has length 462 [2022-11-03 01:44:51,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:51,391 INFO L495 AbstractCegarLoop]: Abstraction has 12838 states and 19938 transitions. [2022-11-03 01:44:51,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 3 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-03 01:44:51,391 INFO L276 IsEmpty]: Start isEmpty. Operand 12838 states and 19938 transitions. [2022-11-03 01:44:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2022-11-03 01:44:51,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:51,421 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:51,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:51,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:44:51,640 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:51,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:51,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1188302982, now seen corresponding path program 1 times [2022-11-03 01:44:51,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:44:51,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82126669] [2022-11-03 01:44:51,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:51,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:44:51,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:44:51,642 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:44:51,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 01:44:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:52,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:44:52,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1403 backedges. 979 proven. 4 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-03 01:44:52,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1403 backedges. 79 proven. 69 refuted. 0 times theorem prover too weak. 1255 trivial. 0 not checked. [2022-11-03 01:44:53,375 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:44:53,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82126669] [2022-11-03 01:44:53,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82126669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:53,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [826740075] [2022-11-03 01:44:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:53,376 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:44:53,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:44:53,383 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:44:53,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 01:44:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:54,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:44:54,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1403 backedges. 979 proven. 4 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-03 01:44:54,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1403 backedges. 79 proven. 69 refuted. 0 times theorem prover too weak. 1255 trivial. 0 not checked. [2022-11-03 01:44:55,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [826740075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:55,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985409382] [2022-11-03 01:44:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:55,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:55,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:55,054 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:55,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-03 01:44:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:55,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:44:55,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1403 backedges. 979 proven. 4 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-03 01:44:55,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1403 backedges. 79 proven. 69 refuted. 0 times theorem prover too weak. 1255 trivial. 0 not checked. [2022-11-03 01:44:56,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985409382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:44:56,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:44:56,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10, 9, 9, 9] total 16 [2022-11-03 01:44:56,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735676762] [2022-11-03 01:44:56,356 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:56,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 01:44:56,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:44:56,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 01:44:56,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:44:56,361 INFO L87 Difference]: Start difference. First operand 12838 states and 19938 transitions. Second operand has 16 states, 16 states have (on average 18.4375) internal successors, (295), 14 states have internal predecessors, (295), 9 states have call successors, (66), 5 states have call predecessors, (66), 11 states have return successors, (70), 11 states have call predecessors, (70), 9 states have call successors, (70) [2022-11-03 01:45:06,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:06,493 INFO L93 Difference]: Finished difference Result 39717 states and 63320 transitions. [2022-11-03 01:45:06,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:45:06,494 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 18.4375) internal successors, (295), 14 states have internal predecessors, (295), 9 states have call successors, (66), 5 states have call predecessors, (66), 11 states have return successors, (70), 11 states have call predecessors, (70), 9 states have call successors, (70) Word has length 463 [2022-11-03 01:45:06,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:06,651 INFO L225 Difference]: With dead ends: 39717 [2022-11-03 01:45:06,651 INFO L226 Difference]: Without dead ends: 27039 [2022-11-03 01:45:06,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2790 GetRequests, 2765 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2022-11-03 01:45:06,741 INFO L413 NwaCegarLoop]: 1416 mSDtfsCounter, 3766 mSDsluCounter, 4103 mSDsCounter, 0 mSdLazyCounter, 7539 mSolverCounterSat, 1191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3868 SdHoareTripleChecker+Valid, 5519 SdHoareTripleChecker+Invalid, 8730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1191 IncrementalHoareTripleChecker+Valid, 7539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:06,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3868 Valid, 5519 Invalid, 8730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1191 Valid, 7539 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-03 01:45:06,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27039 states. [2022-11-03 01:45:09,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27039 to 26269. [2022-11-03 01:45:09,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26269 states, 19416 states have (on average 1.4889266584260403) internal successors, (28909), 20427 states have internal predecessors, (28909), 5085 states have call successors, (5085), 1495 states have call predecessors, (5085), 1767 states have return successors, (7546), 5123 states have call predecessors, (7546), 5059 states have call successors, (7546) [2022-11-03 01:45:09,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26269 states to 26269 states and 41540 transitions. [2022-11-03 01:45:09,779 INFO L78 Accepts]: Start accepts. Automaton has 26269 states and 41540 transitions. Word has length 463 [2022-11-03 01:45:09,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:09,780 INFO L495 AbstractCegarLoop]: Abstraction has 26269 states and 41540 transitions. [2022-11-03 01:45:09,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 18.4375) internal successors, (295), 14 states have internal predecessors, (295), 9 states have call successors, (66), 5 states have call predecessors, (66), 11 states have return successors, (70), 11 states have call predecessors, (70), 9 states have call successors, (70) [2022-11-03 01:45:09,780 INFO L276 IsEmpty]: Start isEmpty. Operand 26269 states and 41540 transitions. [2022-11-03 01:45:09,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2022-11-03 01:45:09,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:09,827 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 14, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:09,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-03 01:45:10,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-11-03 01:45:10,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-03 01:45:10,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:10,443 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:10,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:10,443 INFO L85 PathProgramCache]: Analyzing trace with hash -158471016, now seen corresponding path program 1 times [2022-11-03 01:45:10,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:45:10,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312861527] [2022-11-03 01:45:10,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:10,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:45:10,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:45:10,446 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:45:10,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 01:45:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:11,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:45:11,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:11,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 833 proven. 33 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2022-11-03 01:45:11,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 79 proven. 134 refuted. 0 times theorem prover too weak. 1215 trivial. 0 not checked. [2022-11-03 01:45:12,421 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:45:12,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312861527] [2022-11-03 01:45:12,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312861527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:12,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [211894224] [2022-11-03 01:45:12,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:12,422 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:45:12,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:45:12,427 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:45:12,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 01:45:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:13,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:45:13,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 771 proven. 0 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2022-11-03 01:45:13,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:45:13,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [211894224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:13,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:45:13,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 11] total 16 [2022-11-03 01:45:13,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182203780] [2022-11-03 01:45:13,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:13,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:45:13,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:45:13,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:45:13,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:45:13,186 INFO L87 Difference]: Start difference. First operand 26269 states and 41540 transitions. Second operand has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 states have internal predecessors, (184), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-03 01:45:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:18,860 INFO L93 Difference]: Finished difference Result 65286 states and 105177 transitions. [2022-11-03 01:45:18,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:45:18,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 states have internal predecessors, (184), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) Word has length 465 [2022-11-03 01:45:18,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:19,048 INFO L225 Difference]: With dead ends: 65286 [2022-11-03 01:45:19,048 INFO L226 Difference]: Without dead ends: 39060 [2022-11-03 01:45:19,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1399 GetRequests, 1381 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:45:19,201 INFO L413 NwaCegarLoop]: 1178 mSDtfsCounter, 790 mSDsluCounter, 3906 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 5084 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:19,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 5084 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 01:45:19,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39060 states. [2022-11-03 01:45:23,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39060 to 38616. [2022-11-03 01:45:23,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38616 states, 28704 states have (on average 1.505260590858417) internal successors, (43207), 30147 states have internal predecessors, (43207), 7333 states have call successors, (7333), 2282 states have call predecessors, (7333), 2578 states have return successors, (11466), 7331 states have call predecessors, (11466), 7295 states have call successors, (11466) [2022-11-03 01:45:23,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38616 states to 38616 states and 62006 transitions. [2022-11-03 01:45:23,561 INFO L78 Accepts]: Start accepts. Automaton has 38616 states and 62006 transitions. Word has length 465 [2022-11-03 01:45:23,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:23,562 INFO L495 AbstractCegarLoop]: Abstraction has 38616 states and 62006 transitions. [2022-11-03 01:45:23,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 states have internal predecessors, (184), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-03 01:45:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 38616 states and 62006 transitions. [2022-11-03 01:45:23,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2022-11-03 01:45:23,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:23,614 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 14, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:23,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-03 01:45:23,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2022-11-03 01:45:24,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:45:24,017 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:24,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:24,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1269272888, now seen corresponding path program 1 times [2022-11-03 01:45:24,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:45:24,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124719277] [2022-11-03 01:45:24,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:24,019 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:45:24,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:45:24,020 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:45:24,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 01:45:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:24,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 1720 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:45:24,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 834 proven. 33 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2022-11-03 01:45:24,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:45:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 79 proven. 135 refuted. 0 times theorem prover too weak. 1215 trivial. 0 not checked. [2022-11-03 01:45:25,806 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:45:25,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124719277] [2022-11-03 01:45:25,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124719277] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:45:25,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1719304540] [2022-11-03 01:45:25,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:25,807 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:45:25,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:45:25,811 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:45:25,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b99a7f74-15f0-4689-a0b4-78cd4aed8185/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-03 01:45:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:26,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 1720 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:45:26,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 794 proven. 0 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2022-11-03 01:45:26,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:45:26,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1719304540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:26,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:45:26,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 11] total 19 [2022-11-03 01:45:26,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173661070] [2022-11-03 01:45:26,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:26,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:45:26,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:45:26,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:45:26,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:45:26,675 INFO L87 Difference]: Start difference. First operand 38616 states and 62006 transitions. Second operand has 6 states, 6 states have (on average 31.0) internal successors, (186), 5 states have internal predecessors, (186), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33)