./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl --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 a44e961521da9b8f4535724e185f402d94bec27d495ab6df10e2b3c1ffa4513a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:54:39,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:54:39,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:54:39,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:54:39,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:54:39,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:54:39,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:54:39,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:54:39,700 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:54:39,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:54:39,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:54:39,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:54:39,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:54:39,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:54:39,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:54:39,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:54:39,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:54:39,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:54:39,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:54:39,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:54:39,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:54:39,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:54:39,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:54:39,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:54:39,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:54:39,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:54:39,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:54:39,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:54:39,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:54:39,770 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:54:39,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:54:39,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:54:39,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:54:39,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:54:39,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:54:39,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:54:39,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:54:39,780 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:54:39,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:54:39,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:54:39,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:54:39,783 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:54:39,842 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:54:39,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:54:39,844 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:54:39,844 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:54:39,845 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:54:39,846 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:54:39,846 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:54:39,846 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:54:39,846 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:54:39,847 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:54:39,848 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:54:39,848 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:54:39,849 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:54:39,849 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:54:39,849 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:54:39,850 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:54:39,850 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:54:39,850 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:54:39,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:54:39,852 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:54:39,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:54:39,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:54:39,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:54:39,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:54:39,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:54:39,853 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:54:39,855 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:54:39,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:54:39,856 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:54:39,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:54:39,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:54:39,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:54:39,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:54:39,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:54:39,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:54:39,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:54:39,859 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:54:39,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:54:39,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:54:39,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:54:39,860 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:54:39,860 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a44e961521da9b8f4535724e185f402d94bec27d495ab6df10e2b3c1ffa4513a [2021-11-23 16:54:40,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:54:40,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:54:40,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:54:40,318 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:54:40,319 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:54:40,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c [2021-11-23 16:54:40,411 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/data/91c442875/4de1ded8107547c9995993f21c778d32/FLAGf9708ca81 [2021-11-23 16:54:41,155 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:54:41,155 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c [2021-11-23 16:54:41,169 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/data/91c442875/4de1ded8107547c9995993f21c778d32/FLAGf9708ca81 [2021-11-23 16:54:41,421 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/data/91c442875/4de1ded8107547c9995993f21c778d32 [2021-11-23 16:54:41,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:54:41,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:54:41,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:54:41,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:54:41,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:54:41,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:54:41" (1/1) ... [2021-11-23 16:54:41,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ea24a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:41, skipping insertion in model container [2021-11-23 16:54:41,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:54:41" (1/1) ... [2021-11-23 16:54:41,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:54:41,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:54:41,836 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_62bdd14f-3554-46d0-be5e-659d6449df75/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c[16936,16949] [2021-11-23 16:54:41,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:54:41,851 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:54:41,927 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_62bdd14f-3554-46d0-be5e-659d6449df75/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c[16936,16949] [2021-11-23 16:54:41,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:54:41,957 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:54:41,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:41 WrapperNode [2021-11-23 16:54:41,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:54:41,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:54:41,960 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:54:41,960 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:54:41,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:41" (1/1) ... [2021-11-23 16:54:41,999 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:41" (1/1) ... [2021-11-23 16:54:42,044 INFO L137 Inliner]: procedures = 25, calls = 17, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 461 [2021-11-23 16:54:42,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:54:42,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:54:42,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:54:42,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:54:42,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:41" (1/1) ... [2021-11-23 16:54:42,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:41" (1/1) ... [2021-11-23 16:54:42,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:41" (1/1) ... [2021-11-23 16:54:42,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:41" (1/1) ... [2021-11-23 16:54:42,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:41" (1/1) ... [2021-11-23 16:54:42,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:41" (1/1) ... [2021-11-23 16:54:42,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:41" (1/1) ... [2021-11-23 16:54:42,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:54:42,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:54:42,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:54:42,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:54:42,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:41" (1/1) ... [2021-11-23 16:54:42,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:54:42,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:54:42,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:54:42,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:54:42,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:54:42,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:54:42,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:54:42,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:54:42,417 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:54:42,419 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:54:43,226 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:54:43,344 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$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) [2021-11-23 16:54:43,352 INFO L158 Benchmark]: Toolchain (without parser) took 1922.58ms. Allocated memory was 102.8MB in the beginning and 140.5MB in the end (delta: 37.7MB). Free memory was 63.0MB in the beginning and 111.5MB in the end (delta: -48.5MB). Peak memory consumption was 36.4MB. Max. memory is 16.1GB. [2021-11-23 16:54:43,353 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 102.8MB. Free memory is still 79.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:54:43,355 INFO L158 Benchmark]: CACSL2BoogieTranslator took 529.57ms. Allocated memory is still 102.8MB. Free memory was 62.8MB in the beginning and 71.9MB in the end (delta: -9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 16:54:43,357 INFO L158 Benchmark]: Boogie Procedure Inliner took 85.53ms. Allocated memory is still 102.8MB. Free memory was 71.9MB in the beginning and 68.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:54:43,359 INFO L158 Benchmark]: Boogie Preprocessor took 86.11ms. Allocated memory is still 102.8MB. Free memory was 68.9MB in the beginning and 66.4MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 16:54:43,360 INFO L158 Benchmark]: RCFGBuilder took 1215.07ms. Allocated memory was 102.8MB in the beginning and 140.5MB in the end (delta: 37.7MB). Free memory was 66.4MB in the beginning and 111.5MB in the end (delta: -45.1MB). Peak memory consumption was 40.3MB. Max. memory is 16.1GB. [2021-11-23 16:54:43,372 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 102.8MB. Free memory is still 79.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 529.57ms. Allocated memory is still 102.8MB. Free memory was 62.8MB in the beginning and 71.9MB in the end (delta: -9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 85.53ms. Allocated memory is still 102.8MB. Free memory was 71.9MB in the beginning and 68.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 86.11ms. Allocated memory is still 102.8MB. Free memory was 68.9MB in the beginning and 66.4MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1215.07ms. Allocated memory was 102.8MB in the beginning and 140.5MB in the end (delta: 37.7MB). Free memory was 66.4MB in the beginning and 111.5MB in the end (delta: -45.1MB). Peak memory consumption was 40.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:54:43,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl --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 a44e961521da9b8f4535724e185f402d94bec27d495ab6df10e2b3c1ffa4513a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:54:46,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:54:46,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:54:46,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:54:46,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:54:46,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:54:46,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:54:46,450 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:54:46,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:54:46,455 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:54:46,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:54:46,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:54:46,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:54:46,461 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:54:46,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:54:46,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:54:46,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:54:46,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:54:46,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:54:46,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:54:46,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:54:46,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:54:46,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:54:46,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:54:46,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:54:46,489 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:54:46,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:54:46,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:54:46,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:54:46,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:54:46,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:54:46,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:54:46,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:54:46,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:54:46,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:54:46,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:54:46,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:54:46,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:54:46,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:54:46,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:54:46,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:54:46,510 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:54:46,552 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:54:46,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:54:46,553 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:54:46,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:54:46,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:54:46,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:54:46,555 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:54:46,555 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:54:46,555 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:54:46,556 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:54:46,556 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:54:46,556 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:54:46,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:54:46,558 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:54:46,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:54:46,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:54:46,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:54:46,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:54:46,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:54:46,559 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:54:46,560 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:54:46,560 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:54:46,560 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:54:46,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:54:46,561 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:54:46,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:54:46,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:54:46,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:54:46,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:54:46,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:54:46,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:54:46,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:54:46,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:54:46,564 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:54:46,564 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:54:46,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:54:46,565 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:54:46,565 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:54:46,565 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_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a44e961521da9b8f4535724e185f402d94bec27d495ab6df10e2b3c1ffa4513a [2021-11-23 16:54:47,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:54:47,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:54:47,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:54:47,091 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:54:47,093 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:54:47,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c [2021-11-23 16:54:47,175 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/data/13ee80a86/7c46250332c3461d982166121d7c4112/FLAG5d615c3e1 [2021-11-23 16:54:47,894 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:54:47,894 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c [2021-11-23 16:54:47,913 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/data/13ee80a86/7c46250332c3461d982166121d7c4112/FLAG5d615c3e1 [2021-11-23 16:54:48,150 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/data/13ee80a86/7c46250332c3461d982166121d7c4112 [2021-11-23 16:54:48,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:54:48,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:54:48,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:54:48,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:54:48,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:54:48,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:54:48" (1/1) ... [2021-11-23 16:54:48,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53007f81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:48, skipping insertion in model container [2021-11-23 16:54:48,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:54:48" (1/1) ... [2021-11-23 16:54:48,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:54:48,217 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:54:48,481 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_62bdd14f-3554-46d0-be5e-659d6449df75/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c[16936,16949] [2021-11-23 16:54:48,483 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:54:48,501 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:54:48,665 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_62bdd14f-3554-46d0-be5e-659d6449df75/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c[16936,16949] [2021-11-23 16:54:48,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:54:48,684 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:54:48,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:48 WrapperNode [2021-11-23 16:54:48,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:54:48,687 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:54:48,687 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:54:48,687 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:54:48,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:48" (1/1) ... [2021-11-23 16:54:48,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:48" (1/1) ... [2021-11-23 16:54:48,779 INFO L137 Inliner]: procedures = 25, calls = 17, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 440 [2021-11-23 16:54:48,780 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:54:48,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:54:48,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:54:48,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:54:48,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:48" (1/1) ... [2021-11-23 16:54:48,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:48" (1/1) ... [2021-11-23 16:54:48,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:48" (1/1) ... [2021-11-23 16:54:48,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:48" (1/1) ... [2021-11-23 16:54:48,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:48" (1/1) ... [2021-11-23 16:54:48,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:48" (1/1) ... [2021-11-23 16:54:48,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:48" (1/1) ... [2021-11-23 16:54:48,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:54:48,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:54:48,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:54:48,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:54:48,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:48" (1/1) ... [2021-11-23 16:54:48,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:54:48,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:54:48,884 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:54:48,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:54:48,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:54:48,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:54:48,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:54:48,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:54:49,078 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:54:49,080 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:54:49,823 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:54:49,834 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:54:49,835 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 16:54:49,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:54:49 BoogieIcfgContainer [2021-11-23 16:54:49,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:54:49,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:54:49,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:54:49,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:54:49,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:54:48" (1/3) ... [2021-11-23 16:54:49,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db68a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:54:49, skipping insertion in model container [2021-11-23 16:54:49,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:54:48" (2/3) ... [2021-11-23 16:54:49,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db68a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:54:49, skipping insertion in model container [2021-11-23 16:54:49,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:54:49" (3/3) ... [2021-11-23 16:54:49,848 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c [2021-11-23 16:54:49,854 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:54:49,855 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:54:49,916 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:54:49,924 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 16:54:49,924 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:54:49,947 INFO L276 IsEmpty]: Start isEmpty. Operand has 145 states, 143 states have (on average 1.7202797202797202) internal successors, (246), 144 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:49,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 16:54:49,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:49,964 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:54:49,965 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:54:49,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:49,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1929732074, now seen corresponding path program 1 times [2021-11-23 16:54:49,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:49,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530089481] [2021-11-23 16:54:49,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:49,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:49,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:50,002 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:50,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:54:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:50,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:54:50,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:50,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:54:50,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:50,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530089481] [2021-11-23 16:54:50,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530089481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:54:50,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:54:50,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:54:50,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509159588] [2021-11-23 16:54:50,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:54:50,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:54:50,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:50,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:54:50,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:54:50,506 INFO L87 Difference]: Start difference. First operand has 145 states, 143 states have (on average 1.7202797202797202) internal successors, (246), 144 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:50,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:50,697 INFO L93 Difference]: Finished difference Result 247 states and 408 transitions. [2021-11-23 16:54:50,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:54:50,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-23 16:54:50,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:50,721 INFO L225 Difference]: With dead ends: 247 [2021-11-23 16:54:50,722 INFO L226 Difference]: Without dead ends: 141 [2021-11-23 16:54:50,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:54:50,733 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 3 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:50,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 920 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:54:50,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-23 16:54:50,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-11-23 16:54:50,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.4142857142857144) internal successors, (198), 140 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:50,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 198 transitions. [2021-11-23 16:54:50,788 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 198 transitions. Word has length 37 [2021-11-23 16:54:50,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:50,789 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 198 transitions. [2021-11-23 16:54:50,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:50,789 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 198 transitions. [2021-11-23 16:54:50,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 16:54:50,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:50,793 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:54:50,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:51,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:51,006 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:54:51,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:51,007 INFO L85 PathProgramCache]: Analyzing trace with hash -2008203596, now seen corresponding path program 1 times [2021-11-23 16:54:51,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:51,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504124827] [2021-11-23 16:54:51,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:51,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:51,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:51,010 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:51,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:54:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:51,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:54:51,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:51,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:54:51,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:51,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504124827] [2021-11-23 16:54:51,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504124827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:54:51,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:54:51,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:54:51,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443487252] [2021-11-23 16:54:51,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:54:51,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:54:51,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:51,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:54:51,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:54:51,441 INFO L87 Difference]: Start difference. First operand 141 states and 198 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:51,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:51,498 INFO L93 Difference]: Finished difference Result 317 states and 480 transitions. [2021-11-23 16:54:51,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:54:51,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 16:54:51,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:51,511 INFO L225 Difference]: With dead ends: 317 [2021-11-23 16:54:51,512 INFO L226 Difference]: Without dead ends: 223 [2021-11-23 16:54:51,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:54:51,516 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 139 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:51,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 467 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:54:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-23 16:54:51,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2021-11-23 16:54:51,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.4863636363636363) internal successors, (327), 220 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:51,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 327 transitions. [2021-11-23 16:54:51,543 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 327 transitions. Word has length 77 [2021-11-23 16:54:51,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:51,544 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 327 transitions. [2021-11-23 16:54:51,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:51,544 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 327 transitions. [2021-11-23 16:54:51,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 16:54:51,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:51,547 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:54:51,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:51,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:51,764 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:54:51,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:51,765 INFO L85 PathProgramCache]: Analyzing trace with hash 823495780, now seen corresponding path program 1 times [2021-11-23 16:54:51,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:51,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881802493] [2021-11-23 16:54:51,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:51,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:51,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:51,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:51,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:54:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:51,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:54:51,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:52,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:54:52,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:52,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881802493] [2021-11-23 16:54:52,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881802493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:54:52,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:54:52,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:54:52,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042324137] [2021-11-23 16:54:52,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:54:52,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:54:52,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:52,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:54:52,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:54:52,146 INFO L87 Difference]: Start difference. First operand 221 states and 327 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:52,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:52,171 INFO L93 Difference]: Finished difference Result 545 states and 847 transitions. [2021-11-23 16:54:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:54:52,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-23 16:54:52,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:52,179 INFO L225 Difference]: With dead ends: 545 [2021-11-23 16:54:52,179 INFO L226 Difference]: Without dead ends: 371 [2021-11-23 16:54:52,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:54:52,187 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 134 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:52,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 458 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:54:52,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-11-23 16:54:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 369. [2021-11-23 16:54:52,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.5326086956521738) internal successors, (564), 368 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:52,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 564 transitions. [2021-11-23 16:54:52,252 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 564 transitions. Word has length 78 [2021-11-23 16:54:52,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:52,253 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 564 transitions. [2021-11-23 16:54:52,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:52,253 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 564 transitions. [2021-11-23 16:54:52,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 16:54:52,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:52,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:54:52,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:52,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:52,468 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:54:52,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:52,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1276515004, now seen corresponding path program 1 times [2021-11-23 16:54:52,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:52,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099709503] [2021-11-23 16:54:52,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:52,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:52,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:52,471 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:52,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 16:54:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:52,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:54:52,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:52,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:54:52,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:52,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099709503] [2021-11-23 16:54:52,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099709503] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:54:52,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:54:52,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:54:52,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992125532] [2021-11-23 16:54:52,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:54:52,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:54:52,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:52,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:54:52,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:54:52,844 INFO L87 Difference]: Start difference. First operand 369 states and 564 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:52,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:52,881 INFO L93 Difference]: Finished difference Result 965 states and 1518 transitions. [2021-11-23 16:54:52,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:54:52,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-23 16:54:52,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:52,887 INFO L225 Difference]: With dead ends: 965 [2021-11-23 16:54:52,887 INFO L226 Difference]: Without dead ends: 643 [2021-11-23 16:54:52,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:54:52,890 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 129 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:52,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 449 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:54:52,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-11-23 16:54:52,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 641. [2021-11-23 16:54:52,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 1.55625) internal successors, (996), 640 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:52,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 996 transitions. [2021-11-23 16:54:52,944 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 996 transitions. Word has length 79 [2021-11-23 16:54:52,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:52,945 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 996 transitions. [2021-11-23 16:54:52,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:52,945 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 996 transitions. [2021-11-23 16:54:52,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 16:54:52,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:52,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:54:52,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:53,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:53,162 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:54:53,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:53,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1327982836, now seen corresponding path program 1 times [2021-11-23 16:54:53,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:53,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716412655] [2021-11-23 16:54:53,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:53,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:53,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:53,168 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:53,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:54:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:53,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:54:53,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:53,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:54:53,421 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:53,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716412655] [2021-11-23 16:54:53,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716412655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:54:53,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:54:53,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:54:53,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565783160] [2021-11-23 16:54:53,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:54:53,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:54:53,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:53,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:54:53,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:54:53,431 INFO L87 Difference]: Start difference. First operand 641 states and 996 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:53,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:53,489 INFO L93 Difference]: Finished difference Result 1733 states and 2734 transitions. [2021-11-23 16:54:53,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:54:53,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-23 16:54:53,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:53,499 INFO L225 Difference]: With dead ends: 1733 [2021-11-23 16:54:53,500 INFO L226 Difference]: Without dead ends: 1139 [2021-11-23 16:54:53,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:54:53,502 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 124 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:53,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 440 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:54:53,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-11-23 16:54:53,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1137. [2021-11-23 16:54:53,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 1.5633802816901408) internal successors, (1776), 1136 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:53,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1776 transitions. [2021-11-23 16:54:53,553 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1776 transitions. Word has length 80 [2021-11-23 16:54:53,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:53,553 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 1776 transitions. [2021-11-23 16:54:53,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:53,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1776 transitions. [2021-11-23 16:54:53,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 16:54:53,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:53,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:54:53,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:53,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:53,771 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:54:53,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:53,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1219881940, now seen corresponding path program 1 times [2021-11-23 16:54:53,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:53,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217253028] [2021-11-23 16:54:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:53,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:53,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:53,773 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:53,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:54:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:53,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:54:53,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:54,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:54,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:54:54,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:54,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217253028] [2021-11-23 16:54:54,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217253028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:54:54,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:54:54,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:54:54,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928628854] [2021-11-23 16:54:54,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:54:54,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:54:54,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:54,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:54:54,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:54:54,060 INFO L87 Difference]: Start difference. First operand 1137 states and 1776 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:54,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:54,132 INFO L93 Difference]: Finished difference Result 3125 states and 4914 transitions. [2021-11-23 16:54:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:54:54,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-23 16:54:54,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:54,170 INFO L225 Difference]: With dead ends: 3125 [2021-11-23 16:54:54,170 INFO L226 Difference]: Without dead ends: 2035 [2021-11-23 16:54:54,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:54:54,177 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 119 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:54,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 431 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:54:54,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-11-23 16:54:54,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 2033. [2021-11-23 16:54:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 1.5590551181102361) internal successors, (3168), 2032 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:54,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 3168 transitions. [2021-11-23 16:54:54,268 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 3168 transitions. Word has length 81 [2021-11-23 16:54:54,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:54,269 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 3168 transitions. [2021-11-23 16:54:54,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:54,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 3168 transitions. [2021-11-23 16:54:54,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 16:54:54,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:54,271 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:54:54,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:54,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:54,483 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:54:54,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:54,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1035004540, now seen corresponding path program 1 times [2021-11-23 16:54:54,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:54,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1494005480] [2021-11-23 16:54:54,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:54,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:54,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:54,488 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:54,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 16:54:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:54,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:54:54,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:54,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:54:54,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:54,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1494005480] [2021-11-23 16:54:54,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1494005480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:54:54,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:54:54,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:54:54,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358592202] [2021-11-23 16:54:54,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:54:54,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:54:54,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:54:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:54:54,742 INFO L87 Difference]: Start difference. First operand 2033 states and 3168 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:54,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:54,854 INFO L93 Difference]: Finished difference Result 5621 states and 8770 transitions. [2021-11-23 16:54:54,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:54:54,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-23 16:54:54,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:54,878 INFO L225 Difference]: With dead ends: 5621 [2021-11-23 16:54:54,879 INFO L226 Difference]: Without dead ends: 3635 [2021-11-23 16:54:54,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:54:54,887 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 114 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:54,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 422 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:54:54,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3635 states. [2021-11-23 16:54:55,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3635 to 3633. [2021-11-23 16:54:55,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3633 states, 3632 states have (on average 1.5462555066079295) internal successors, (5616), 3632 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:55,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3633 states to 3633 states and 5616 transitions. [2021-11-23 16:54:55,084 INFO L78 Accepts]: Start accepts. Automaton has 3633 states and 5616 transitions. Word has length 82 [2021-11-23 16:54:55,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:55,084 INFO L470 AbstractCegarLoop]: Abstraction has 3633 states and 5616 transitions. [2021-11-23 16:54:55,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:55,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3633 states and 5616 transitions. [2021-11-23 16:54:55,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 16:54:55,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:55,086 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:54:55,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:55,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:55,299 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:54:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:55,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1846622820, now seen corresponding path program 1 times [2021-11-23 16:54:55,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:55,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817705177] [2021-11-23 16:54:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:55,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:55,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:55,303 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:55,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 16:54:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:55,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:54:55,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:54:55,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:54:55,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:55,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817705177] [2021-11-23 16:54:55,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817705177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:54:55,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:54:55,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:54:55,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618751371] [2021-11-23 16:54:55,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:54:55,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:54:55,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:55,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:54:55,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:54:55,935 INFO L87 Difference]: Start difference. First operand 3633 states and 5616 transitions. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:56,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:56,823 INFO L93 Difference]: Finished difference Result 22653 states and 34710 transitions. [2021-11-23 16:54:56,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:54:56,824 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-23 16:54:56,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:56,955 INFO L225 Difference]: With dead ends: 22653 [2021-11-23 16:54:56,955 INFO L226 Difference]: Without dead ends: 19067 [2021-11-23 16:54:56,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:54:56,964 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 952 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:56,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [952 Valid, 1087 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 16:54:56,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19067 states. [2021-11-23 16:54:57,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19067 to 19057. [2021-11-23 16:54:57,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19057 states, 19056 states have (on average 1.5256087321578506) internal successors, (29072), 19056 states have internal predecessors, (29072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:58,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19057 states to 19057 states and 29072 transitions. [2021-11-23 16:54:58,070 INFO L78 Accepts]: Start accepts. Automaton has 19057 states and 29072 transitions. Word has length 83 [2021-11-23 16:54:58,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:58,071 INFO L470 AbstractCegarLoop]: Abstraction has 19057 states and 29072 transitions. [2021-11-23 16:54:58,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 19057 states and 29072 transitions. [2021-11-23 16:54:58,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-23 16:54:58,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:58,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:54:58,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:58,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:54:58,291 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:54:58,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:58,292 INFO L85 PathProgramCache]: Analyzing trace with hash -927768561, now seen corresponding path program 1 times [2021-11-23 16:54:58,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:58,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889664749] [2021-11-23 16:54:58,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:58,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:58,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:58,296 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:58,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:54:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:58,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:54:58,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:00,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:55:00,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:55:00,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889664749] [2021-11-23 16:55:00,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889664749] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:55:00,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:55:00,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:55:00,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118280483] [2021-11-23 16:55:00,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:55:00,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:55:00,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:55:00,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:55:00,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:55:00,299 INFO L87 Difference]: Start difference. First operand 19057 states and 29072 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:02,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:55:02,956 INFO L93 Difference]: Finished difference Result 106847 states and 163447 transitions. [2021-11-23 16:55:02,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:55:02,958 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-23 16:55:02,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:55:03,204 INFO L225 Difference]: With dead ends: 106847 [2021-11-23 16:55:03,204 INFO L226 Difference]: Without dead ends: 87837 [2021-11-23 16:55:03,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:55:03,390 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 1401 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:55:03,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1401 Valid, 1346 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:55:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87837 states. [2021-11-23 16:55:05,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87837 to 38065. [2021-11-23 16:55:05,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38065 states, 38064 states have (on average 1.5060949978982765) internal successors, (57328), 38064 states have internal predecessors, (57328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:05,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38065 states to 38065 states and 57328 transitions. [2021-11-23 16:55:05,931 INFO L78 Accepts]: Start accepts. Automaton has 38065 states and 57328 transitions. Word has length 84 [2021-11-23 16:55:05,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:55:05,931 INFO L470 AbstractCegarLoop]: Abstraction has 38065 states and 57328 transitions. [2021-11-23 16:55:05,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:05,932 INFO L276 IsEmpty]: Start isEmpty. Operand 38065 states and 57328 transitions. [2021-11-23 16:55:05,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 16:55:05,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:55:05,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:55:05,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:55:06,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:55:06,154 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:55:06,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:55:06,155 INFO L85 PathProgramCache]: Analyzing trace with hash 920622579, now seen corresponding path program 1 times [2021-11-23 16:55:06,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:55:06,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790926468] [2021-11-23 16:55:06,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:06,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:55:06,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:55:06,156 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:55:06,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 16:55:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:06,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:55:06,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:06,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:55:06,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:55:06,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790926468] [2021-11-23 16:55:06,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790926468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:55:06,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:55:06,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:55:06,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659542340] [2021-11-23 16:55:06,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:55:06,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:55:06,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:55:06,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:55:06,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:55:06,441 INFO L87 Difference]: Start difference. First operand 38065 states and 57328 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:09,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:55:09,341 INFO L93 Difference]: Finished difference Result 79155 states and 117681 transitions. [2021-11-23 16:55:09,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:55:09,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-23 16:55:09,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:55:09,502 INFO L225 Difference]: With dead ends: 79155 [2021-11-23 16:55:09,502 INFO L226 Difference]: Without dead ends: 79153 [2021-11-23 16:55:09,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:55:09,520 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 432 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:55:09,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 866 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:55:09,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79153 states. [2021-11-23 16:55:11,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79153 to 40369. [2021-11-23 16:55:11,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40369 states, 40368 states have (on average 1.4772096710265556) internal successors, (59632), 40368 states have internal predecessors, (59632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:11,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40369 states to 40369 states and 59632 transitions. [2021-11-23 16:55:11,688 INFO L78 Accepts]: Start accepts. Automaton has 40369 states and 59632 transitions. Word has length 85 [2021-11-23 16:55:11,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:55:11,689 INFO L470 AbstractCegarLoop]: Abstraction has 40369 states and 59632 transitions. [2021-11-23 16:55:11,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:11,689 INFO L276 IsEmpty]: Start isEmpty. Operand 40369 states and 59632 transitions. [2021-11-23 16:55:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-23 16:55:11,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:55:11,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:55:11,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:55:11,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:55:11,904 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:55:11,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:55:11,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1472892313, now seen corresponding path program 1 times [2021-11-23 16:55:11,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:55:11,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734117801] [2021-11-23 16:55:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:11,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:55:11,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:55:11,907 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:55:11,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 16:55:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:11,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:55:11,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:12,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:55:12,199 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:55:12,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [734117801] [2021-11-23 16:55:12,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [734117801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:55:12,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:55:12,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:55:12,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445998394] [2021-11-23 16:55:12,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:55:12,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:55:12,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:55:12,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:55:12,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:55:12,202 INFO L87 Difference]: Start difference. First operand 40369 states and 59632 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:55:14,618 INFO L93 Difference]: Finished difference Result 98711 states and 145940 transitions. [2021-11-23 16:55:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:55:14,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-23 16:55:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:55:14,713 INFO L225 Difference]: With dead ends: 98711 [2021-11-23 16:55:14,713 INFO L226 Difference]: Without dead ends: 58389 [2021-11-23 16:55:14,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:55:14,761 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 105 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:55:14,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 397 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:55:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58389 states. [2021-11-23 16:55:17,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58389 to 58387. [2021-11-23 16:55:17,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58387 states, 58386 states have (on average 1.4729901003665262) internal successors, (86002), 58386 states have internal predecessors, (86002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58387 states to 58387 states and 86002 transitions. [2021-11-23 16:55:17,357 INFO L78 Accepts]: Start accepts. Automaton has 58387 states and 86002 transitions. Word has length 86 [2021-11-23 16:55:17,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:55:17,358 INFO L470 AbstractCegarLoop]: Abstraction has 58387 states and 86002 transitions. [2021-11-23 16:55:17,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:17,358 INFO L276 IsEmpty]: Start isEmpty. Operand 58387 states and 86002 transitions. [2021-11-23 16:55:17,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 16:55:17,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:55:17,393 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:55:17,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-23 16:55:17,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:55:17,607 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:55:17,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:55:17,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1072838691, now seen corresponding path program 1 times [2021-11-23 16:55:17,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:55:17,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911675217] [2021-11-23 16:55:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:17,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:55:17,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:55:17,610 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:55:17,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 16:55:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:17,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:55:17,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:19,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:55:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:20,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:55:20,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911675217] [2021-11-23 16:55:20,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911675217] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:55:20,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1316306338] [2021-11-23 16:55:20,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:20,822 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:55:20,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:55:20,824 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:55:20,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 16:55:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:21,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:55:21,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:22,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:55:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:23,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1316306338] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:55:23,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237093508] [2021-11-23 16:55:23,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:23,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:55:23,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:55:23,280 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:55:23,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 16:55:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:23,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:55:23,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:25,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:55:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:25,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237093508] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:55:25,747 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:55:25,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:55:25,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321249741] [2021-11-23 16:55:25,749 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:55:25,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:55:25,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:55:25,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:55:25,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:55:25,751 INFO L87 Difference]: Start difference. First operand 58387 states and 86002 transitions. Second operand has 16 states, 16 states have (on average 13.3125) internal successors, (213), 15 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:28,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:55:28,904 INFO L93 Difference]: Finished difference Result 118103 states and 173834 transitions. [2021-11-23 16:55:28,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 16:55:28,905 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.3125) internal successors, (213), 15 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-23 16:55:28,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:55:28,999 INFO L225 Difference]: With dead ends: 118103 [2021-11-23 16:55:28,999 INFO L226 Difference]: Without dead ends: 67221 [2021-11-23 16:55:29,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-23 16:55:29,034 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 513 mSDsluCounter, 2125 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 421 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:55:29,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 2433 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 355 Invalid, 0 Unknown, 421 Unchecked, 0.3s Time] [2021-11-23 16:55:29,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67221 states. [2021-11-23 16:55:31,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67221 to 58444. [2021-11-23 16:55:31,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58444 states, 58443 states have (on average 1.4729052238933662) internal successors, (86081), 58443 states have internal predecessors, (86081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:32,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58444 states to 58444 states and 86081 transitions. [2021-11-23 16:55:32,013 INFO L78 Accepts]: Start accepts. Automaton has 58444 states and 86081 transitions. Word has length 117 [2021-11-23 16:55:32,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:55:32,013 INFO L470 AbstractCegarLoop]: Abstraction has 58444 states and 86081 transitions. [2021-11-23 16:55:32,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.3125) internal successors, (213), 15 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:32,014 INFO L276 IsEmpty]: Start isEmpty. Operand 58444 states and 86081 transitions. [2021-11-23 16:55:32,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 16:55:32,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:55:32,052 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:55:32,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 16:55:32,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 16:55:32,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:55:32,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:55:32,655 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:55:32,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:55:32,656 INFO L85 PathProgramCache]: Analyzing trace with hash -393566437, now seen corresponding path program 1 times [2021-11-23 16:55:32,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:55:32,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876927849] [2021-11-23 16:55:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:32,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:55:32,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:55:32,658 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:55:32,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 16:55:32,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:32,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:55:32,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 16:55:33,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:55:33,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:55:33,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876927849] [2021-11-23 16:55:33,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876927849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:55:33,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:55:33,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:55:33,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978447749] [2021-11-23 16:55:33,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:55:33,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:55:33,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:55:33,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:55:33,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:55:33,424 INFO L87 Difference]: Start difference. First operand 58444 states and 86081 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:35,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:55:35,839 INFO L93 Difference]: Finished difference Result 109329 states and 161256 transitions. [2021-11-23 16:55:35,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:55:35,839 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-23 16:55:35,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:55:35,916 INFO L225 Difference]: With dead ends: 109329 [2021-11-23 16:55:35,916 INFO L226 Difference]: Without dead ends: 58447 [2021-11-23 16:55:35,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:55:35,949 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 58 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:55:35,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 443 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2021-11-23 16:55:35,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58447 states. [2021-11-23 16:55:38,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58447 to 58444. [2021-11-23 16:55:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58444 states, 58443 states have (on average 1.4728881132043188) internal successors, (86080), 58443 states have internal predecessors, (86080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:38,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58444 states to 58444 states and 86080 transitions. [2021-11-23 16:55:38,516 INFO L78 Accepts]: Start accepts. Automaton has 58444 states and 86080 transitions. Word has length 117 [2021-11-23 16:55:38,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:55:38,516 INFO L470 AbstractCegarLoop]: Abstraction has 58444 states and 86080 transitions. [2021-11-23 16:55:38,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:38,516 INFO L276 IsEmpty]: Start isEmpty. Operand 58444 states and 86080 transitions. [2021-11-23 16:55:38,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 16:55:38,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:55:38,538 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:55:38,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 16:55:38,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:55:38,751 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:55:38,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:55:38,752 INFO L85 PathProgramCache]: Analyzing trace with hash 127521347, now seen corresponding path program 1 times [2021-11-23 16:55:38,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:55:38,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661707749] [2021-11-23 16:55:38,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:38,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:55:38,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:55:38,755 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:55:38,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 16:55:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:38,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:55:38,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:40,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:55:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:41,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:55:41,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661707749] [2021-11-23 16:55:41,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661707749] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:55:41,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1057419587] [2021-11-23 16:55:41,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:41,479 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:55:41,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:55:41,480 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:55:41,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 16:55:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:41,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:55:41,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:43,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:55:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:44,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1057419587] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:55:44,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61940671] [2021-11-23 16:55:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:44,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:55:44,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:55:44,244 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:55:44,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 16:55:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:44,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:55:44,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:46,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:55:47,064 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:47,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61940671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:55:47,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:55:47,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:55:47,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129690685] [2021-11-23 16:55:47,069 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:55:47,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:55:47,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:55:47,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:55:47,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:55:47,072 INFO L87 Difference]: Start difference. First operand 58444 states and 86080 transitions. Second operand has 16 states, 16 states have (on average 14.0625) internal successors, (225), 15 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:49,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:55:49,989 INFO L93 Difference]: Finished difference Result 95666 states and 141274 transitions. [2021-11-23 16:55:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 16:55:49,990 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 14.0625) internal successors, (225), 15 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-23 16:55:49,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:55:50,089 INFO L225 Difference]: With dead ends: 95666 [2021-11-23 16:55:50,090 INFO L226 Difference]: Without dead ends: 74160 [2021-11-23 16:55:50,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-23 16:55:50,111 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 444 mSDsluCounter, 3010 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 3291 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 405 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:55:50,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 3291 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 162 Invalid, 0 Unknown, 405 Unchecked, 0.2s Time] [2021-11-23 16:55:50,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74160 states. [2021-11-23 16:55:53,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74160 to 71330. [2021-11-23 16:55:53,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71330 states, 71329 states have (on average 1.4609625818390837) internal successors, (104209), 71329 states have internal predecessors, (104209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:53,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71330 states to 71330 states and 104209 transitions. [2021-11-23 16:55:53,549 INFO L78 Accepts]: Start accepts. Automaton has 71330 states and 104209 transitions. Word has length 117 [2021-11-23 16:55:53,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:55:53,550 INFO L470 AbstractCegarLoop]: Abstraction has 71330 states and 104209 transitions. [2021-11-23 16:55:53,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.0625) internal successors, (225), 15 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:53,550 INFO L276 IsEmpty]: Start isEmpty. Operand 71330 states and 104209 transitions. [2021-11-23 16:55:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 16:55:53,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:55:53,577 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:55:53,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 16:55:53,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-23 16:55:54,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 16:55:54,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:55:54,178 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:55:54,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:55:54,179 INFO L85 PathProgramCache]: Analyzing trace with hash -225567035, now seen corresponding path program 1 times [2021-11-23 16:55:54,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:55:54,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764481016] [2021-11-23 16:55:54,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:54,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:55:54,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:55:54,181 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:55:54,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 16:55:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:54,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:55:54,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:55:54,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:55:54,983 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:55:54,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764481016] [2021-11-23 16:55:54,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764481016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:55:54,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:55:54,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:55:54,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595990665] [2021-11-23 16:55:54,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:55:54,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:55:54,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:55:54,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:55:54,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:55:54,987 INFO L87 Difference]: Start difference. First operand 71330 states and 104209 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:57,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:55:57,587 INFO L93 Difference]: Finished difference Result 96336 states and 141054 transitions. [2021-11-23 16:55:57,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:55:57,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-23 16:55:57,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:55:57,687 INFO L225 Difference]: With dead ends: 96336 [2021-11-23 16:55:57,687 INFO L226 Difference]: Without dead ends: 71338 [2021-11-23 16:55:57,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:55:57,710 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 79 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:55:57,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 485 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2021-11-23 16:55:57,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71338 states. [2021-11-23 16:56:01,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71338 to 71330. [2021-11-23 16:56:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71330 states, 71329 states have (on average 1.4609485622958405) internal successors, (104208), 71329 states have internal predecessors, (104208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:01,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71330 states to 71330 states and 104208 transitions. [2021-11-23 16:56:01,287 INFO L78 Accepts]: Start accepts. Automaton has 71330 states and 104208 transitions. Word has length 117 [2021-11-23 16:56:01,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:01,287 INFO L470 AbstractCegarLoop]: Abstraction has 71330 states and 104208 transitions. [2021-11-23 16:56:01,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:01,288 INFO L276 IsEmpty]: Start isEmpty. Operand 71330 states and 104208 transitions. [2021-11-23 16:56:01,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 16:56:01,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:01,319 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:56:01,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:01,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:01,521 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:56:01,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:01,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1592395683, now seen corresponding path program 1 times [2021-11-23 16:56:01,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:01,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860718099] [2021-11-23 16:56:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:01,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:01,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:01,524 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:01,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 16:56:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:01,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:56:01,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:02,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:03,361 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:03,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860718099] [2021-11-23 16:56:03,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860718099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:03,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [597629947] [2021-11-23 16:56:03,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:03,361 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:56:03,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:56:03,362 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:56:03,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-23 16:56:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:03,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:56:03,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:04,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:05,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [597629947] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:05,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832287652] [2021-11-23 16:56:05,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:05,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:56:05,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:56:05,350 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:56:05,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62bdd14f-3554-46d0-be5e-659d6449df75/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 16:56:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:05,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:56:05,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:06,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:07,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832287652] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:07,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:56:07,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 16:56:07,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024051683] [2021-11-23 16:56:07,131 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:56:07,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:56:07,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:07,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:56:07,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:56:07,133 INFO L87 Difference]: Start difference. First operand 71330 states and 104208 transitions. Second operand has 16 states, 16 states have (on average 12.8125) internal successors, (205), 15 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)