./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label44.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_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/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_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label44.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/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_3d75b73f-a916-404d-aa16-e6f2a44ca71c/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 a251e8bd1fa18f71142ab77e725d3376cb9c86e0251b5d23fbb6f012a8340ced --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:01:34,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:01:34,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:01:34,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:01:34,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:01:34,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:01:34,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:01:34,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:01:34,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:01:34,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:01:34,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:01:34,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:01:34,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:01:34,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:01:34,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:01:34,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:01:34,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:01:34,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:01:34,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:01:34,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:01:34,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:01:34,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:01:34,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:01:34,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:01:34,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:01:34,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:01:34,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:01:34,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:01:34,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:01:34,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:01:34,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:01:34,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:01:34,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:01:34,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:01:34,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:01:34,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:01:34,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:01:34,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:01:34,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:01:34,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:01:34,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:01:34,626 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:01:34,652 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:01:34,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:01:34,653 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:01:34,653 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:01:34,654 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:01:34,654 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:01:34,654 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:01:34,655 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:01:34,655 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:01:34,655 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:01:34,655 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:01:34,655 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:01:34,656 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:01:34,656 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:01:34,656 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:01:34,656 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:01:34,656 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:01:34,657 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:01:34,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:01:34,658 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:01:34,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:01:34,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:01:34,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:01:34,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:01:34,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:01:34,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:01:34,659 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:01:34,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:01:34,659 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:01:34,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:01:34,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:01:34,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:01:34,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:01:34,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:01:34,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:01:34,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:01:34,661 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:01:34,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:01:34,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:01:34,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:01:34,662 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:01:34,662 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_3d75b73f-a916-404d-aa16-e6f2a44ca71c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a251e8bd1fa18f71142ab77e725d3376cb9c86e0251b5d23fbb6f012a8340ced [2021-11-23 17:01:34,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:01:34,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:01:35,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:01:35,004 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:01:35,005 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:01:35,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem14_label44.c [2021-11-23 17:01:35,092 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/data/8024048ff/6c26a2c4461a4a7a964f2cebe6d44b42/FLAG7a7190e11 [2021-11-23 17:01:35,807 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:01:35,807 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/sv-benchmarks/c/eca-rers2012/Problem14_label44.c [2021-11-23 17:01:35,826 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/data/8024048ff/6c26a2c4461a4a7a964f2cebe6d44b42/FLAG7a7190e11 [2021-11-23 17:01:36,025 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/data/8024048ff/6c26a2c4461a4a7a964f2cebe6d44b42 [2021-11-23 17:01:36,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:01:36,031 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:01:36,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:01:36,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:01:36,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:01:36,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:01:36" (1/1) ... [2021-11-23 17:01:36,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d9018e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:36, skipping insertion in model container [2021-11-23 17:01:36,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:01:36" (1/1) ... [2021-11-23 17:01:36,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:01:36,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:01:36,316 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_3d75b73f-a916-404d-aa16-e6f2a44ca71c/sv-benchmarks/c/eca-rers2012/Problem14_label44.c[1450,1463] [2021-11-23 17:01:36,599 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:01:36,613 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:01:36,627 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_3d75b73f-a916-404d-aa16-e6f2a44ca71c/sv-benchmarks/c/eca-rers2012/Problem14_label44.c[1450,1463] [2021-11-23 17:01:36,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:01:36,771 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:01:36,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:36 WrapperNode [2021-11-23 17:01:36,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:01:36,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:01:36,774 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:01:36,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:01:36,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:36" (1/1) ... [2021-11-23 17:01:36,809 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:36" (1/1) ... [2021-11-23 17:01:36,904 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 858 [2021-11-23 17:01:36,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:01:36,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:01:36,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:01:36,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:01:36,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:36" (1/1) ... [2021-11-23 17:01:36,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:36" (1/1) ... [2021-11-23 17:01:36,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:36" (1/1) ... [2021-11-23 17:01:36,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:36" (1/1) ... [2021-11-23 17:01:36,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:36" (1/1) ... [2021-11-23 17:01:36,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:36" (1/1) ... [2021-11-23 17:01:37,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:36" (1/1) ... [2021-11-23 17:01:37,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:01:37,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:01:37,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:01:37,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:01:37,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:36" (1/1) ... [2021-11-23 17:01:37,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:01:37,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:01:37,066 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:01:37,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:01:37,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:01:37,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:01:37,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:01:37,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:01:37,185 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:01:37,187 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:01:38,524 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:01:38,573 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 17:01:38,580 INFO L158 Benchmark]: Toolchain (without parser) took 2545.59ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 69.5MB in the beginning and 98.2MB in the end (delta: -28.7MB). Peak memory consumption was 67.4MB. Max. memory is 16.1GB. [2021-11-23 17:01:38,580 INFO L158 Benchmark]: CDTParser took 0.42ms. Allocated memory is still 100.7MB. Free memory is still 53.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:01:38,583 INFO L158 Benchmark]: CACSL2BoogieTranslator took 739.79ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 69.2MB in the beginning and 90.8MB in the end (delta: -21.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 17:01:38,584 INFO L158 Benchmark]: Boogie Procedure Inliner took 131.07ms. Allocated memory is still 136.3MB. Free memory was 90.8MB in the beginning and 80.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:01:38,585 INFO L158 Benchmark]: Boogie Preprocessor took 114.90ms. Allocated memory is still 136.3MB. Free memory was 80.9MB in the beginning and 75.1MB in the end (delta: 5.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 17:01:38,586 INFO L158 Benchmark]: RCFGBuilder took 1554.59ms. Allocated memory is still 136.3MB. Free memory was 75.1MB in the beginning and 98.2MB in the end (delta: -23.0MB). Peak memory consumption was 38.5MB. Max. memory is 16.1GB. [2021-11-23 17:01:38,595 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42ms. Allocated memory is still 100.7MB. Free memory is still 53.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 739.79ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 69.2MB in the beginning and 90.8MB in the end (delta: -21.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 131.07ms. Allocated memory is still 136.3MB. Free memory was 90.8MB in the beginning and 80.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 114.90ms. Allocated memory is still 136.3MB. Free memory was 80.9MB in the beginning and 75.1MB in the end (delta: 5.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 1554.59ms. Allocated memory is still 136.3MB. Free memory was 75.1MB in the beginning and 98.2MB in the end (delta: -23.0MB). Peak memory consumption was 38.5MB. 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 17:01:38,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/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_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label44.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/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_3d75b73f-a916-404d-aa16-e6f2a44ca71c/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 a251e8bd1fa18f71142ab77e725d3376cb9c86e0251b5d23fbb6f012a8340ced --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:01:41,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:01:41,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:01:41,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:01:41,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:01:41,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:01:41,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:01:41,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:01:41,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:01:41,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:01:41,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:01:41,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:01:41,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:01:41,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:01:41,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:01:41,251 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:01:41,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:01:41,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:01:41,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:01:41,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:01:41,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:01:41,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:01:41,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:01:41,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:01:41,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:01:41,285 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:01:41,285 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:01:41,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:01:41,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:01:41,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:01:41,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:01:41,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:01:41,293 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:01:41,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:01:41,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:01:41,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:01:41,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:01:41,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:01:41,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:01:41,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:01:41,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:01:41,300 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:01:41,341 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:01:41,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:01:41,342 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:01:41,342 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:01:41,343 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:01:41,343 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:01:41,343 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:01:41,343 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:01:41,344 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:01:41,344 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:01:41,344 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:01:41,344 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:01:41,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:01:41,345 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:01:41,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:01:41,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:01:41,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:01:41,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:01:41,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:01:41,347 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:01:41,347 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:01:41,347 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:01:41,347 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:01:41,348 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:01:41,348 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:01:41,348 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:01:41,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:01:41,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:01:41,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:01:41,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:01:41,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:01:41,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:01:41,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:01:41,350 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:01:41,350 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:01:41,350 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:01:41,351 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:01:41,351 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:01:41,351 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_3d75b73f-a916-404d-aa16-e6f2a44ca71c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a251e8bd1fa18f71142ab77e725d3376cb9c86e0251b5d23fbb6f012a8340ced [2021-11-23 17:01:41,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:01:41,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:01:41,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:01:41,824 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:01:41,825 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:01:41,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem14_label44.c [2021-11-23 17:01:41,905 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/data/22c497636/4c8faab20ffb4fab8d68f9524f2858bd/FLAG01331751d [2021-11-23 17:01:42,625 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:01:42,626 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/sv-benchmarks/c/eca-rers2012/Problem14_label44.c [2021-11-23 17:01:42,638 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/data/22c497636/4c8faab20ffb4fab8d68f9524f2858bd/FLAG01331751d [2021-11-23 17:01:42,830 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/data/22c497636/4c8faab20ffb4fab8d68f9524f2858bd [2021-11-23 17:01:42,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:01:42,836 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:01:42,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:01:42,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:01:42,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:01:42,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:01:42" (1/1) ... [2021-11-23 17:01:42,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17efd72d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:42, skipping insertion in model container [2021-11-23 17:01:42,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:01:42" (1/1) ... [2021-11-23 17:01:42,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:01:42,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:01:43,180 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_3d75b73f-a916-404d-aa16-e6f2a44ca71c/sv-benchmarks/c/eca-rers2012/Problem14_label44.c[1450,1463] [2021-11-23 17:01:43,483 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:01:43,494 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:01:43,509 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_3d75b73f-a916-404d-aa16-e6f2a44ca71c/sv-benchmarks/c/eca-rers2012/Problem14_label44.c[1450,1463] [2021-11-23 17:01:43,681 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:01:43,703 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:01:43,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:43 WrapperNode [2021-11-23 17:01:43,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:01:43,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:01:43,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:01:43,706 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:01:43,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:43" (1/1) ... [2021-11-23 17:01:43,761 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:43" (1/1) ... [2021-11-23 17:01:43,861 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 856 [2021-11-23 17:01:43,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:01:43,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:01:43,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:01:43,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:01:43,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:43" (1/1) ... [2021-11-23 17:01:43,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:43" (1/1) ... [2021-11-23 17:01:43,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:43" (1/1) ... [2021-11-23 17:01:43,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:43" (1/1) ... [2021-11-23 17:01:43,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:43" (1/1) ... [2021-11-23 17:01:43,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:43" (1/1) ... [2021-11-23 17:01:43,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:43" (1/1) ... [2021-11-23 17:01:43,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:01:43,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:01:43,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:01:43,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:01:43,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:43" (1/1) ... [2021-11-23 17:01:43,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:01:43,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:01:44,010 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:01:44,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:01:44,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:01:44,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:01:44,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:01:44,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:01:44,149 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:01:44,151 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:01:47,386 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:01:47,397 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:01:47,397 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:01:47,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:01:47 BoogieIcfgContainer [2021-11-23 17:01:47,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:01:47,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:01:47,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:01:47,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:01:47,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:01:42" (1/3) ... [2021-11-23 17:01:47,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728d2c3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:01:47, skipping insertion in model container [2021-11-23 17:01:47,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:43" (2/3) ... [2021-11-23 17:01:47,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728d2c3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:01:47, skipping insertion in model container [2021-11-23 17:01:47,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:01:47" (3/3) ... [2021-11-23 17:01:47,413 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label44.c [2021-11-23 17:01:47,419 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:01:47,419 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:01:47,472 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:01:47,479 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 17:01:47,480 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:01:47,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 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 17:01:47,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 17:01:47,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:47,513 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:47,513 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:47,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:47,519 INFO L85 PathProgramCache]: Analyzing trace with hash -988188511, now seen corresponding path program 1 times [2021-11-23 17:01:47,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:47,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708499737] [2021-11-23 17:01:47,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:47,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:47,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:47,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:47,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:01:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:47,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:47,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:47,726 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 17:01:47,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:47,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:47,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708499737] [2021-11-23 17:01:47,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708499737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:47,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:47,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:01:47,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355444081] [2021-11-23 17:01:47,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:47,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:47,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:47,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:47,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:47,807 INFO L87 Difference]: Start difference. First operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 17:01:51,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:51,554 INFO L93 Difference]: Finished difference Result 669 states and 1200 transitions. [2021-11-23 17:01:51,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:51,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2021-11-23 17:01:51,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:51,571 INFO L225 Difference]: With dead ends: 669 [2021-11-23 17:01:51,572 INFO L226 Difference]: Without dead ends: 360 [2021-11-23 17:01:51,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 17:01:51,580 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 184 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:51,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 131 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-23 17:01:51,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-23 17:01:51,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-11-23 17:01:51,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.4874651810584958) internal successors, (534), 359 states have internal predecessors, (534), 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 17:01:51,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 534 transitions. [2021-11-23 17:01:51,649 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 534 transitions. Word has length 11 [2021-11-23 17:01:51,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:51,650 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 534 transitions. [2021-11-23 17:01:51,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 17:01:51,651 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 534 transitions. [2021-11-23 17:01:51,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 17:01:51,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:51,655 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 17:01:51,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 17:01:51,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:51,865 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:51,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:51,866 INFO L85 PathProgramCache]: Analyzing trace with hash 682578220, now seen corresponding path program 1 times [2021-11-23 17:01:51,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:51,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768815981] [2021-11-23 17:01:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:51,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:51,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:51,871 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:51,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:01:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:51,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:51,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:52,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:52,257 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:52,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768815981] [2021-11-23 17:01:52,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768815981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:52,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:52,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:01:52,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908764244] [2021-11-23 17:01:52,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:52,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:52,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:52,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:52,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:52,271 INFO L87 Difference]: Start difference. First operand 360 states and 534 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 17:01:55,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:55,826 INFO L93 Difference]: Finished difference Result 1074 states and 1597 transitions. [2021-11-23 17:01:55,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:55,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 76 [2021-11-23 17:01:55,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:55,833 INFO L225 Difference]: With dead ends: 1074 [2021-11-23 17:01:55,833 INFO L226 Difference]: Without dead ends: 716 [2021-11-23 17:01:55,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 74 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 17:01:55,837 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 115 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:55,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 102 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-23 17:01:55,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-11-23 17:01:55,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2021-11-23 17:01:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.3454545454545455) internal successors, (962), 715 states have internal predecessors, (962), 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 17:01:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 962 transitions. [2021-11-23 17:01:55,883 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 962 transitions. Word has length 76 [2021-11-23 17:01:55,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:55,884 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 962 transitions. [2021-11-23 17:01:55,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 17:01:55,885 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 962 transitions. [2021-11-23 17:01:55,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 17:01:55,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:55,888 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 17:01:55,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:56,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:56,100 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:56,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:56,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1691026282, now seen corresponding path program 1 times [2021-11-23 17:01:56,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:56,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476787843] [2021-11-23 17:01:56,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:56,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:56,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:56,102 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:56,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:01:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:56,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:56,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:56,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:56,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:56,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476787843] [2021-11-23 17:01:56,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476787843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:56,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:56,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:01:56,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671304998] [2021-11-23 17:01:56,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:56,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:56,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:56,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:56,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:56,523 INFO L87 Difference]: Start difference. First operand 716 states and 962 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 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 17:01:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:59,873 INFO L93 Difference]: Finished difference Result 1964 states and 2655 transitions. [2021-11-23 17:01:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:59,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 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 17:01:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:59,881 INFO L225 Difference]: With dead ends: 1964 [2021-11-23 17:01:59,882 INFO L226 Difference]: Without dead ends: 1250 [2021-11-23 17:01:59,883 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 17:01:59,887 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 129 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:59,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 89 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-23 17:01:59,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-23 17:01:59,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1250. [2021-11-23 17:01:59,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 1.245796637309848) internal successors, (1556), 1249 states have internal predecessors, (1556), 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 17:01:59,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1556 transitions. [2021-11-23 17:01:59,961 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1556 transitions. Word has length 79 [2021-11-23 17:01:59,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:59,964 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1556 transitions. [2021-11-23 17:01:59,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 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 17:01:59,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1556 transitions. [2021-11-23 17:01:59,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-23 17:01:59,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:59,981 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:59,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:00,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:02:00,195 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:00,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:00,196 INFO L85 PathProgramCache]: Analyzing trace with hash -111072445, now seen corresponding path program 1 times [2021-11-23 17:02:00,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:00,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140429394] [2021-11-23 17:02:00,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:00,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:00,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:00,200 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:00,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:02:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:00,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:02:00,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:01,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:02,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:02,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140429394] [2021-11-23 17:02:02,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140429394] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:02:02,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1731208825] [2021-11-23 17:02:02,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:02,045 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:02:02,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:02:02,047 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:02:02,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-23 17:02:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:02,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:02:02,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 76 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:02,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 76 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:03,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1731208825] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:02:03,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882280408] [2021-11-23 17:02:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:03,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:02:03,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:02:03,451 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:02:03,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 17:02:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:03,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:02:03,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:04,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:02:04,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882280408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:02:04,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:02:04,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4, 4] total 9 [2021-11-23 17:02:04,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771306442] [2021-11-23 17:02:04,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:02:04,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:02:04,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:04,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:02:04,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:02:04,432 INFO L87 Difference]: Start difference. First operand 1250 states and 1556 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 3 states have internal predecessors, (160), 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 17:02:10,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:10,565 INFO L93 Difference]: Finished difference Result 2378 states and 3064 transitions. [2021-11-23 17:02:10,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:02:10,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 3 states have internal predecessors, (160), 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 160 [2021-11-23 17:02:10,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:10,574 INFO L225 Difference]: With dead ends: 2378 [2021-11-23 17:02:10,574 INFO L226 Difference]: Without dead ends: 1250 [2021-11-23 17:02:10,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 788 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:02:10,577 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 211 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:10,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 16 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-11-23 17:02:10,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-23 17:02:10,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1072. [2021-11-23 17:02:10,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.0999066293183941) internal successors, (1178), 1071 states have internal predecessors, (1178), 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 17:02:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1178 transitions. [2021-11-23 17:02:10,609 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1178 transitions. Word has length 160 [2021-11-23 17:02:10,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:10,610 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1178 transitions. [2021-11-23 17:02:10,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 3 states have internal predecessors, (160), 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 17:02:10,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1178 transitions. [2021-11-23 17:02:10,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-23 17:02:10,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:10,624 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:02:10,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:10,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-23 17:02:11,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:11,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:02:11,225 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:11,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:11,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1449026334, now seen corresponding path program 1 times [2021-11-23 17:02:11,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:11,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684977823] [2021-11-23 17:02:11,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:11,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:11,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:11,229 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:11,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:02:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:11,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:02:11,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-23 17:02:12,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:02:12,623 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:12,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684977823] [2021-11-23 17:02:12,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684977823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:02:12,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:02:12,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:02:12,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044615899] [2021-11-23 17:02:12,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:02:12,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:02:12,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:12,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:02:12,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:02:12,626 INFO L87 Difference]: Start difference. First operand 1072 states and 1178 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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 17:02:14,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:14,250 INFO L93 Difference]: Finished difference Result 1786 states and 1991 transitions. [2021-11-23 17:02:14,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:02:14,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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 186 [2021-11-23 17:02:14,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:14,257 INFO L225 Difference]: With dead ends: 1786 [2021-11-23 17:02:14,257 INFO L226 Difference]: Without dead ends: 1072 [2021-11-23 17:02:14,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 184 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 17:02:14,260 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 73 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:14,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 67 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 17:02:14,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-11-23 17:02:14,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2021-11-23 17:02:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.096171802054155) internal successors, (1174), 1071 states have internal predecessors, (1174), 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 17:02:14,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1174 transitions. [2021-11-23 17:02:14,287 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1174 transitions. Word has length 186 [2021-11-23 17:02:14,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:14,288 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1174 transitions. [2021-11-23 17:02:14,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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 17:02:14,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1174 transitions. [2021-11-23 17:02:14,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-11-23 17:02:14,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:14,296 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 17:02:14,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:14,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:02:14,509 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:14,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:14,509 INFO L85 PathProgramCache]: Analyzing trace with hash 354077223, now seen corresponding path program 1 times [2021-11-23 17:02:14,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:14,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1088218120] [2021-11-23 17:02:14,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:14,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:14,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:14,514 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:14,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:02:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:14,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:02:14,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 232 proven. 210 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-23 17:02:15,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 442 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-23 17:02:17,227 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:17,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1088218120] [2021-11-23 17:02:17,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1088218120] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:02:17,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:02:17,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:02:17,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027279333] [2021-11-23 17:02:17,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:02:17,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:02:17,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:17,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:02:17,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:02:17,230 INFO L87 Difference]: Start difference. First operand 1072 states and 1174 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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 17:02:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:21,904 INFO L93 Difference]: Finished difference Result 2320 states and 2617 transitions. [2021-11-23 17:02:21,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:02:21,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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 397 [2021-11-23 17:02:21,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:21,914 INFO L225 Difference]: With dead ends: 2320 [2021-11-23 17:02:21,914 INFO L226 Difference]: Without dead ends: 1606 [2021-11-23 17:02:21,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 789 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:02:21,916 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 76 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:21,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 230 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-23 17:02:21,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-11-23 17:02:21,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1606. [2021-11-23 17:02:21,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 1.1190031152647975) internal successors, (1796), 1605 states have internal predecessors, (1796), 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 17:02:21,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 1796 transitions. [2021-11-23 17:02:21,961 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 1796 transitions. Word has length 397 [2021-11-23 17:02:21,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:21,962 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 1796 transitions. [2021-11-23 17:02:21,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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 17:02:21,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 1796 transitions. [2021-11-23 17:02:21,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-11-23 17:02:21,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:21,971 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:02:21,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:22,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:02:22,189 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:22,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:22,190 INFO L85 PathProgramCache]: Analyzing trace with hash 2137769198, now seen corresponding path program 1 times [2021-11-23 17:02:22,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:22,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618094096] [2021-11-23 17:02:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:22,195 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:22,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:22,196 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:22,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:02:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:22,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:02:22,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 35 proven. 347 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-23 17:02:24,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 382 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-23 17:02:27,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:27,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618094096] [2021-11-23 17:02:27,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618094096] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:02:27,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:02:27,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:02:27,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126569875] [2021-11-23 17:02:27,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:02:27,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:02:27,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:27,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:02:27,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:02:27,524 INFO L87 Difference]: Start difference. First operand 1606 states and 1796 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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 17:02:31,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:31,195 INFO L93 Difference]: Finished difference Result 3210 states and 3663 transitions. [2021-11-23 17:02:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:02:31,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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 404 [2021-11-23 17:02:31,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:31,207 INFO L225 Difference]: With dead ends: 3210 [2021-11-23 17:02:31,208 INFO L226 Difference]: Without dead ends: 1962 [2021-11-23 17:02:31,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:02:31,211 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:31,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 20 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-23 17:02:31,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2021-11-23 17:02:31,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1962. [2021-11-23 17:02:31,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 1.1147373788883224) internal successors, (2186), 1961 states have internal predecessors, (2186), 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 17:02:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2186 transitions. [2021-11-23 17:02:31,274 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2186 transitions. Word has length 404 [2021-11-23 17:02:31,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:31,275 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 2186 transitions. [2021-11-23 17:02:31,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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 17:02:31,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2186 transitions. [2021-11-23 17:02:31,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2021-11-23 17:02:31,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:31,279 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:02:31,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:31,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:02:31,494 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:31,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:31,494 INFO L85 PathProgramCache]: Analyzing trace with hash -180492059, now seen corresponding path program 1 times [2021-11-23 17:02:31,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:31,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398194388] [2021-11-23 17:02:31,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:31,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:31,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:31,498 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:31,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:02:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:31,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:02:31,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 35 proven. 416 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:02:39,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 382 proven. 69 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:03:01,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:01,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398194388] [2021-11-23 17:03:01,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398194388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:01,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [689925986] [2021-11-23 17:03:01,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:01,978 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:01,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:01,979 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:01,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 17:03:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:02,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:03:02,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2021-11-23 17:03:02,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:02,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [689925986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:02,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:03:02,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10, 10] total 19 [2021-11-23 17:03:02,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196808528] [2021-11-23 17:03:02,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:02,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:03:02,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:02,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:03:02,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:03:02,739 INFO L87 Difference]: Start difference. First operand 1962 states and 2186 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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 17:03:05,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:05,154 INFO L93 Difference]: Finished difference Result 4100 states and 4655 transitions. [2021-11-23 17:03:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:03:05,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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 449 [2021-11-23 17:03:05,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:05,183 INFO L225 Difference]: With dead ends: 4100 [2021-11-23 17:03:05,184 INFO L226 Difference]: Without dead ends: 2318 [2021-11-23 17:03:05,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1344 GetRequests, 1327 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:03:05,188 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 170 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:05,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 242 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 17:03:05,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-11-23 17:03:05,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2140. [2021-11-23 17:03:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 1.1065918653576439) internal successors, (2367), 2139 states have internal predecessors, (2367), 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 17:03:05,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 2367 transitions. [2021-11-23 17:03:05,252 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 2367 transitions. Word has length 449 [2021-11-23 17:03:05,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:05,254 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 2367 transitions. [2021-11-23 17:03:05,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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 17:03:05,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 2367 transitions. [2021-11-23 17:03:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2021-11-23 17:03:05,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:05,260 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:03:05,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:05,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:05,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:05,662 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:05,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:05,663 INFO L85 PathProgramCache]: Analyzing trace with hash 938353963, now seen corresponding path program 1 times [2021-11-23 17:03:05,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:05,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649766128] [2021-11-23 17:03:05,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:05,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:05,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:05,667 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:05,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:03:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:05,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:03:05,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 340 proven. 416 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-23 17:03:13,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 687 proven. 69 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-23 17:03:36,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:36,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649766128] [2021-11-23 17:03:36,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649766128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:36,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1927153520] [2021-11-23 17:03:36,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:36,287 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:36,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:36,288 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:36,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:03:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:36,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:03:36,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 349 proven. 0 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2021-11-23 17:03:37,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:37,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1927153520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:37,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:03:37,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 22 [2021-11-23 17:03:37,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549306886] [2021-11-23 17:03:37,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:37,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:03:37,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:37,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:03:37,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:03:37,987 INFO L87 Difference]: Start difference. First operand 2140 states and 2367 transitions. Second operand has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 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 17:03:39,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:39,964 INFO L93 Difference]: Finished difference Result 3972 states and 4423 transitions. [2021-11-23 17:03:39,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:03:39,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 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 528 [2021-11-23 17:03:39,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:39,977 INFO L225 Difference]: With dead ends: 3972 [2021-11-23 17:03:39,977 INFO L226 Difference]: Without dead ends: 2140 [2021-11-23 17:03:39,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1581 GetRequests, 1561 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:03:39,981 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 54 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:39,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 258 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-23 17:03:39,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-11-23 17:03:40,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2140. [2021-11-23 17:03:40,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 1.0977092099111734) internal successors, (2348), 2139 states have internal predecessors, (2348), 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 17:03:40,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 2348 transitions. [2021-11-23 17:03:40,043 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 2348 transitions. Word has length 528 [2021-11-23 17:03:40,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:40,044 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 2348 transitions. [2021-11-23 17:03:40,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 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 17:03:40,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 2348 transitions. [2021-11-23 17:03:40,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2021-11-23 17:03:40,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:40,051 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:40,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:40,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:40,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:40,465 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:40,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:40,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1980148466, now seen corresponding path program 1 times [2021-11-23 17:03:40,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:40,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842343082] [2021-11-23 17:03:40,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:40,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:40,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:40,470 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:40,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:03:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:40,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:03:40,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 389 proven. 210 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-23 17:03:46,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 599 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-23 17:04:13,692 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:13,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842343082] [2021-11-23 17:04:13,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842343082] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:04:13,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:04:13,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 17 [2021-11-23 17:04:13,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238823123] [2021-11-23 17:04:13,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:04:13,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:04:13,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:13,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:04:13,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:04:13,696 INFO L87 Difference]: Start difference. First operand 2140 states and 2348 transitions. Second operand has 9 states, 9 states have (on average 48.888888888888886) internal successors, (440), 9 states have internal predecessors, (440), 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 17:04:19,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:19,149 INFO L93 Difference]: Finished difference Result 3897 states and 4308 transitions. [2021-11-23 17:04:19,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:04:19,150 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 48.888888888888886) internal successors, (440), 9 states have internal predecessors, (440), 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 555 [2021-11-23 17:04:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:19,161 INFO L225 Difference]: With dead ends: 3897 [2021-11-23 17:04:19,161 INFO L226 Difference]: Without dead ends: 2075 [2021-11-23 17:04:19,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1108 GetRequests, 1093 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:04:19,165 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 210 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:19,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 247 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-23 17:04:19,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-11-23 17:04:19,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2075. [2021-11-23 17:04:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2075 states, 2074 states have (on average 1.099324975891996) internal successors, (2280), 2074 states have internal predecessors, (2280), 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 17:04:19,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 2280 transitions. [2021-11-23 17:04:19,218 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 2280 transitions. Word has length 555 [2021-11-23 17:04:19,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:19,219 INFO L470 AbstractCegarLoop]: Abstraction has 2075 states and 2280 transitions. [2021-11-23 17:04:19,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 48.888888888888886) internal successors, (440), 9 states have internal predecessors, (440), 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 17:04:19,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 2280 transitions. [2021-11-23 17:04:19,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2021-11-23 17:04:19,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:19,225 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:04:19,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:19,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:04:19,441 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:04:19,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:19,442 INFO L85 PathProgramCache]: Analyzing trace with hash -437976968, now seen corresponding path program 1 times [2021-11-23 17:04:19,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:19,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484429550] [2021-11-23 17:04:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:19,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:19,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:19,446 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:19,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:04:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:19,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:04:19,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 430 proven. 353 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-11-23 17:04:21,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 783 proven. 0 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-11-23 17:04:22,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:22,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484429550] [2021-11-23 17:04:22,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484429550] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:04:22,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:04:22,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:04:22,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672134357] [2021-11-23 17:04:22,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:04:22,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:04:22,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:22,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:04:22,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:04:22,645 INFO L87 Difference]: Start difference. First operand 2075 states and 2280 transitions. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 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 17:04:26,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:26,948 INFO L93 Difference]: Finished difference Result 4682 states and 5241 transitions. [2021-11-23 17:04:26,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:04:26,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 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 582 [2021-11-23 17:04:26,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:26,962 INFO L225 Difference]: With dead ends: 4682 [2021-11-23 17:04:26,962 INFO L226 Difference]: Without dead ends: 2965 [2021-11-23 17:04:26,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1162 GetRequests, 1159 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:04:26,965 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 70 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:26,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 52 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-23 17:04:26,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-11-23 17:04:27,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2787. [2021-11-23 17:04:27,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 1.094759511844939) internal successors, (3050), 2786 states have internal predecessors, (3050), 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 17:04:27,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 3050 transitions. [2021-11-23 17:04:27,032 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 3050 transitions. Word has length 582 [2021-11-23 17:04:27,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:27,033 INFO L470 AbstractCegarLoop]: Abstraction has 2787 states and 3050 transitions. [2021-11-23 17:04:27,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 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 17:04:27,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 3050 transitions. [2021-11-23 17:04:27,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 738 [2021-11-23 17:04:27,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:27,042 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 17:04:27,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:27,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:04:27,258 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:04:27,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:27,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1925648828, now seen corresponding path program 1 times [2021-11-23 17:04:27,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:27,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768463705] [2021-11-23 17:04:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:27,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:27,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:27,263 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:27,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:04:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:27,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:04:27,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 881 proven. 0 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2021-11-23 17:04:28,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:04:28,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:28,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768463705] [2021-11-23 17:04:28,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768463705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:04:28,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:04:28,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:04:28,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964418205] [2021-11-23 17:04:28,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:04:28,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:04:28,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:28,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:04:28,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:04:28,573 INFO L87 Difference]: Start difference. First operand 2787 states and 3050 transitions. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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 17:04:30,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:30,615 INFO L93 Difference]: Finished difference Result 6284 states and 6936 transitions. [2021-11-23 17:04:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:04:30,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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 737 [2021-11-23 17:04:30,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:30,637 INFO L225 Difference]: With dead ends: 6284 [2021-11-23 17:04:30,637 INFO L226 Difference]: Without dead ends: 3677 [2021-11-23 17:04:30,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 735 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 17:04:30,640 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 107 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:30,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 222 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 17:04:30,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3677 states. [2021-11-23 17:04:30,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3677 to 3677. [2021-11-23 17:04:30,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3677 states, 3676 states have (on average 1.0718171926006528) internal successors, (3940), 3676 states have internal predecessors, (3940), 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 17:04:30,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 3940 transitions. [2021-11-23 17:04:30,726 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 3940 transitions. Word has length 737 [2021-11-23 17:04:30,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:30,727 INFO L470 AbstractCegarLoop]: Abstraction has 3677 states and 3940 transitions. [2021-11-23 17:04:30,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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 17:04:30,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 3940 transitions. [2021-11-23 17:04:30,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2021-11-23 17:04:30,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:30,737 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:04:30,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:30,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:04:30,951 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:04:30,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:30,952 INFO L85 PathProgramCache]: Analyzing trace with hash -242787977, now seen corresponding path program 1 times [2021-11-23 17:04:30,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:30,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919379938] [2021-11-23 17:04:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:30,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:30,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:30,957 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:30,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:04:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:31,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:04:31,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:38,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 1221 proven. 420 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2021-11-23 17:04:38,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:05:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 1641 proven. 0 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2021-11-23 17:05:00,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:05:00,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919379938] [2021-11-23 17:05:00,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919379938] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:05:00,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:05:00,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 19 [2021-11-23 17:05:00,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178619865] [2021-11-23 17:05:00,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:05:00,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 17:05:00,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:05:00,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 17:05:00,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:05:00,780 INFO L87 Difference]: Start difference. First operand 3677 states and 3940 transitions. Second operand has 10 states, 10 states have (on average 56.6) internal successors, (566), 10 states have internal predecessors, (566), 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 17:05:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:05:06,229 INFO L93 Difference]: Finished difference Result 7338 states and 7870 transitions. [2021-11-23 17:05:06,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:05:06,230 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 56.6) internal successors, (566), 10 states have internal predecessors, (566), 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 830 [2021-11-23 17:05:06,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:05:06,245 INFO L225 Difference]: With dead ends: 7338 [2021-11-23 17:05:06,245 INFO L226 Difference]: Without dead ends: 3832 [2021-11-23 17:05:06,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1658 GetRequests, 1641 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:05:06,249 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 263 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:05:06,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 256 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1932 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-23 17:05:06,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3832 states. [2021-11-23 17:05:06,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3832 to 3832. [2021-11-23 17:05:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3832 states, 3831 states have (on average 1.0657791699295223) internal successors, (4083), 3831 states have internal predecessors, (4083), 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 17:05:06,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 4083 transitions. [2021-11-23 17:05:06,332 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 4083 transitions. Word has length 830 [2021-11-23 17:05:06,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:05:06,333 INFO L470 AbstractCegarLoop]: Abstraction has 3832 states and 4083 transitions. [2021-11-23 17:05:06,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.6) internal successors, (566), 10 states have internal predecessors, (566), 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 17:05:06,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 4083 transitions. [2021-11-23 17:05:06,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2021-11-23 17:05:06,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:05:06,344 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:05:06,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:06,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:05:06,559 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:05:06,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:05:06,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1251525506, now seen corresponding path program 1 times [2021-11-23 17:05:06,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:05:06,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840852694] [2021-11-23 17:05:06,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:06,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:05:06,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:05:06,565 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:05:06,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:05:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:06,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:05:06,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:09,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2540 backedges. 71 proven. 2098 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2021-11-23 17:05:09,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:05:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2540 backedges. 1521 proven. 75 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-11-23 17:05:13,558 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:05:13,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840852694] [2021-11-23 17:05:13,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840852694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:05:13,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1795852636] [2021-11-23 17:05:13,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:13,558 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:05:13,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:05:13,560 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:05:13,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 17:05:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:14,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:05:14,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2540 backedges. 583 proven. 9 refuted. 0 times theorem prover too weak. 1948 trivial. 0 not checked. [2021-11-23 17:05:15,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:05:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2540 backedges. 583 proven. 9 refuted. 0 times theorem prover too weak. 1948 trivial. 0 not checked. [2021-11-23 17:05:16,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1795852636] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:05:16,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876405574] [2021-11-23 17:05:16,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:16,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:05:16,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:05:16,974 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:05:16,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 17:05:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:17,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:05:17,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2540 backedges. 104 proven. 488 refuted. 0 times theorem prover too weak. 1948 trivial. 0 not checked. [2021-11-23 17:05:19,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:05:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2540 backedges. 104 proven. 488 refuted. 0 times theorem prover too weak. 1948 trivial. 0 not checked. [2021-11-23 17:05:22,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876405574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:05:22,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:05:22,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5, 5] total 17 [2021-11-23 17:05:22,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790119175] [2021-11-23 17:05:22,527 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:05:22,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 17:05:22,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:05:22,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 17:05:22,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:05:22,534 INFO L87 Difference]: Start difference. First operand 3832 states and 4083 transitions. Second operand has 17 states, 17 states have (on average 86.6470588235294) internal successors, (1473), 17 states have internal predecessors, (1473), 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 17:05:45,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:05:45,939 INFO L93 Difference]: Finished difference Result 10259 states and 11036 transitions. [2021-11-23 17:05:45,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 17:05:45,940 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 86.6470588235294) internal successors, (1473), 17 states have internal predecessors, (1473), 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 907 [2021-11-23 17:05:45,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:05:45,970 INFO L225 Difference]: With dead ends: 10259 [2021-11-23 17:05:45,971 INFO L226 Difference]: Without dead ends: 6607 [2021-11-23 17:05:45,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5468 GetRequests, 5437 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 17:05:45,975 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7310 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 7398 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7310 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 8106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 7398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:05:45,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7310 Valid, 135 Invalid, 8106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 7398 Invalid, 0 Unknown, 0 Unchecked, 22.8s Time] [2021-11-23 17:05:45,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6607 states. [2021-11-23 17:05:46,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6607 to 6158. [2021-11-23 17:05:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6158 states, 6157 states have (on average 1.0573331167776514) internal successors, (6510), 6157 states have internal predecessors, (6510), 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 17:05:46,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6158 states to 6158 states and 6510 transitions. [2021-11-23 17:05:46,074 INFO L78 Accepts]: Start accepts. Automaton has 6158 states and 6510 transitions. Word has length 907 [2021-11-23 17:05:46,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:05:46,076 INFO L470 AbstractCegarLoop]: Abstraction has 6158 states and 6510 transitions. [2021-11-23 17:05:46,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 86.6470588235294) internal successors, (1473), 17 states have internal predecessors, (1473), 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 17:05:46,077 INFO L276 IsEmpty]: Start isEmpty. Operand 6158 states and 6510 transitions. [2021-11-23 17:05:46,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 932 [2021-11-23 17:05:46,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:05:46,089 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:05:46,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:46,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:46,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:46,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:05:46,705 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:05:46,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:05:46,706 INFO L85 PathProgramCache]: Analyzing trace with hash 651117897, now seen corresponding path program 1 times [2021-11-23 17:05:46,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:05:46,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37449100] [2021-11-23 17:05:46,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:46,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:05:46,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:05:46,710 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:05:46,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:05:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:46,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 17:05:46,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 747 proven. 1545 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-23 17:05:55,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:07:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 1587 proven. 705 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-23 17:07:09,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:07:09,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37449100] [2021-11-23 17:07:09,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37449100] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:07:09,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1353278771] [2021-11-23 17:07:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:07:09,269 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:07:09,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:07:09,271 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:07:09,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-23 17:07:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:07:09,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:07:09,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:07:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 1547 proven. 212 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2021-11-23 17:07:14,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:07:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 1475 proven. 284 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2021-11-23 17:07:25,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1353278771] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:07:25,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914133448] [2021-11-23 17:07:25,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:07:25,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:07:25,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:07:25,763 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:07:25,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 17:07:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:07:26,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:07:26,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:07:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 1274 proven. 7 refuted. 0 times theorem prover too weak. 1124 trivial. 0 not checked. [2021-11-23 17:07:32,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:07:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 1274 proven. 7 refuted. 0 times theorem prover too weak. 1124 trivial. 0 not checked. [2021-11-23 17:07:38,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914133448] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:07:38,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:07:38,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9, 10, 4, 4] total 38 [2021-11-23 17:07:38,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105130036] [2021-11-23 17:07:38,606 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:07:38,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-23 17:07:38,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:07:38,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-23 17:07:38,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1070, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 17:07:38,612 INFO L87 Difference]: Start difference. First operand 6158 states and 6510 transitions. Second operand has 38 states, 38 states have (on average 70.55263157894737) internal successors, (2681), 38 states have internal predecessors, (2681), 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 17:08:51,089 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:09:29,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:09:39,382 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:09,655 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:51,866 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:57,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:10:57,363 INFO L93 Difference]: Finished difference Result 14280 states and 15106 transitions. [2021-11-23 17:10:57,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-23 17:10:57,370 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 70.55263157894737) internal successors, (2681), 38 states have internal predecessors, (2681), 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 931 [2021-11-23 17:10:57,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:10:57,397 INFO L225 Difference]: With dead ends: 14280 [2021-11-23 17:10:57,397 INFO L226 Difference]: Without dead ends: 8274 [2021-11-23 17:10:57,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5628 GetRequests, 5561 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 58.4s TimeCoverageRelationStatistics Valid=996, Invalid=3696, Unknown=0, NotChecked=0, Total=4692 [2021-11-23 17:10:57,404 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 3400 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 12153 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3400 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 12566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 12153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 144.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:10:57,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3400 Valid, 227 Invalid, 12566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 12153 Invalid, 0 Unknown, 0 Unchecked, 144.5s Time] [2021-11-23 17:10:57,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8274 states. [2021-11-23 17:10:57,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8274 to 7118. [2021-11-23 17:10:57,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7118 states, 7117 states have (on average 1.0498805676549108) internal successors, (7472), 7117 states have internal predecessors, (7472), 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 17:10:57,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7118 states to 7118 states and 7472 transitions. [2021-11-23 17:10:57,554 INFO L78 Accepts]: Start accepts. Automaton has 7118 states and 7472 transitions. Word has length 931 [2021-11-23 17:10:57,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:10:57,555 INFO L470 AbstractCegarLoop]: Abstraction has 7118 states and 7472 transitions. [2021-11-23 17:10:57,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 70.55263157894737) internal successors, (2681), 38 states have internal predecessors, (2681), 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 17:10:57,556 INFO L276 IsEmpty]: Start isEmpty. Operand 7118 states and 7472 transitions. [2021-11-23 17:10:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1016 [2021-11-23 17:10:57,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:10:57,573 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:10:57,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:10:57,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:10:57,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-23 17:10:58,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:10:58,189 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:10:58,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:10:58,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1549488596, now seen corresponding path program 1 times [2021-11-23 17:10:58,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:10:58,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467096901] [2021-11-23 17:10:58,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:10:58,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:10:58,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:10:58,203 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:10:58,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d75b73f-a916-404d-aa16-e6f2a44ca71c/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:10:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:10:58,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:10:58,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:11:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2962 backedges. 1535 proven. 1115 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-11-23 17:11:07,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:12:12,078 WARN L860 $PredicateComparison]: unable to prove that (bvslt (_ bv11 32) (bvadd (_ bv42 32) (bvsrem (bvadd (_ bv464909 32) (bvsdiv (bvsdiv (bvadd (_ bv4294967295 32) (bvsrem c_~a12~0 (_ bv26 32))) (_ bv5 32)) (_ bv5 32))) (_ bv34 32)))) is different from true