./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label34.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_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/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_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label34.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/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_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/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 c727ce378f9c6151587faf5638863d5f3634ffe42c74bcfcd0e6318a1faa4f2e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:30,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:30,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:30,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:30,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:30,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:30,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:30,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:30,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:30,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:30,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:30,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:30,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:30,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:30,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:30,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:30,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:30,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:30,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:30,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:30,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:30,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:30,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:30,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:30,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:30,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:30,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:30,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:30,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:30,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:30,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:30,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:30,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:30,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:30,658 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:30,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:30,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:30,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:30,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:30,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:30,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:30,663 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:45:30,716 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:30,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:30,723 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:30,724 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:30,724 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:30,725 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:30,725 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:30,725 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:30,725 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:30,725 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:45:30,726 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:30,727 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:30,727 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:45:30,727 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:45:30,727 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:30,727 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:45:30,727 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:45:30,728 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:45:30,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:30,729 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:30,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:45:30,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:30,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:30,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:45:30,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:30,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:45:30,730 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:30,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:45:30,730 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:30,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:45:30,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:30,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:30,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:30,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:30,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:30,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:45:30,732 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:45:30,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:45:30,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:45:30,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:30,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:30,733 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_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c727ce378f9c6151587faf5638863d5f3634ffe42c74bcfcd0e6318a1faa4f2e [2021-11-23 16:45:30,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:31,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:31,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:31,008 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:31,009 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:31,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem13_label34.c [2021-11-23 16:45:31,084 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/data/d59e35b92/6b529cb7e04e4ac8a6e99d5a911adaa5/FLAG3279a63b8 [2021-11-23 16:45:31,909 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:31,909 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/sv-benchmarks/c/eca-rers2012/Problem13_label34.c [2021-11-23 16:45:31,946 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/data/d59e35b92/6b529cb7e04e4ac8a6e99d5a911adaa5/FLAG3279a63b8 [2021-11-23 16:45:32,394 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/data/d59e35b92/6b529cb7e04e4ac8a6e99d5a911adaa5 [2021-11-23 16:45:32,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:32,398 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:32,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:32,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:32,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:32,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:32" (1/1) ... [2021-11-23 16:45:32,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@484eb8a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:32, skipping insertion in model container [2021-11-23 16:45:32,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:32" (1/1) ... [2021-11-23 16:45:32,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:32,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:32,975 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_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/sv-benchmarks/c/eca-rers2012/Problem13_label34.c[7959,7972] [2021-11-23 16:45:34,071 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:34,080 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:34,127 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_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/sv-benchmarks/c/eca-rers2012/Problem13_label34.c[7959,7972] [2021-11-23 16:45:34,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:34,977 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:34,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34 WrapperNode [2021-11-23 16:45:34,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:34,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:34,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:34,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:34,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:35,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:35,778 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-11-23 16:45:35,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:35,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:35,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:35,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:35,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:35,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:35,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:35,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:36,228 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:36,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:36,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:36,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:36,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:36,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:36,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:36,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:36,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:36,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:36,575 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:36,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:36,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:45:36,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:45:36,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:36,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:36,718 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:36,720 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:45:42,676 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:45:42,749 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 16:45:42,755 INFO L158 Benchmark]: Toolchain (without parser) took 10353.56ms. Allocated memory was 121.6MB in the beginning and 864.0MB in the end (delta: 742.4MB). Free memory was 68.0MB in the beginning and 536.2MB in the end (delta: -468.2MB). Peak memory consumption was 274.9MB. Max. memory is 16.1GB. [2021-11-23 16:45:42,756 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 121.6MB. Free memory was 91.5MB in the beginning and 91.5MB in the end (delta: 29.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:45:42,757 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2576.89ms. Allocated memory was 121.6MB in the beginning and 159.4MB in the end (delta: 37.7MB). Free memory was 67.6MB in the beginning and 75.2MB in the end (delta: -7.6MB). Peak memory consumption was 68.7MB. Max. memory is 16.1GB. [2021-11-23 16:45:42,758 INFO L158 Benchmark]: Boogie Procedure Inliner took 800.09ms. Allocated memory was 159.4MB in the beginning and 222.3MB in the end (delta: 62.9MB). Free memory was 75.2MB in the beginning and 85.7MB in the end (delta: -10.5MB). Peak memory consumption was 99.6MB. Max. memory is 16.1GB. [2021-11-23 16:45:42,760 INFO L158 Benchmark]: Boogie Preprocessor took 756.67ms. Allocated memory was 222.3MB in the beginning and 444.6MB in the end (delta: 222.3MB). Free memory was 85.7MB in the beginning and 277.1MB in the end (delta: -191.5MB). Peak memory consumption was 53.5MB. Max. memory is 16.1GB. [2021-11-23 16:45:42,761 INFO L158 Benchmark]: RCFGBuilder took 6213.82ms. Allocated memory was 444.6MB in the beginning and 864.0MB in the end (delta: 419.4MB). Free memory was 277.1MB in the beginning and 536.2MB in the end (delta: -259.1MB). Peak memory consumption was 162.2MB. Max. memory is 16.1GB. [2021-11-23 16:45:42,770 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 121.6MB. Free memory was 91.5MB in the beginning and 91.5MB in the end (delta: 29.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2576.89ms. Allocated memory was 121.6MB in the beginning and 159.4MB in the end (delta: 37.7MB). Free memory was 67.6MB in the beginning and 75.2MB in the end (delta: -7.6MB). Peak memory consumption was 68.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 800.09ms. Allocated memory was 159.4MB in the beginning and 222.3MB in the end (delta: 62.9MB). Free memory was 75.2MB in the beginning and 85.7MB in the end (delta: -10.5MB). Peak memory consumption was 99.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 756.67ms. Allocated memory was 222.3MB in the beginning and 444.6MB in the end (delta: 222.3MB). Free memory was 85.7MB in the beginning and 277.1MB in the end (delta: -191.5MB). Peak memory consumption was 53.5MB. Max. memory is 16.1GB. * RCFGBuilder took 6213.82ms. Allocated memory was 444.6MB in the beginning and 864.0MB in the end (delta: 419.4MB). Free memory was 277.1MB in the beginning and 536.2MB in the end (delta: -259.1MB). Peak memory consumption was 162.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:45:42,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/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_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label34.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/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_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/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 c727ce378f9c6151587faf5638863d5f3634ffe42c74bcfcd0e6318a1faa4f2e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:45,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:45,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:45,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:45,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:45,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:45,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:45,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:45,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:45,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:45,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:45,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:45,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:45,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:45,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:45,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:45,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:45,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:45,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:45,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:45,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:45,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:45,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:45,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:45,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:45,346 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:45,346 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:45,347 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:45,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:45,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:45,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:45,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:45,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:45,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:45,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:45,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:45,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:45,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:45,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:45,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:45,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:45,359 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:45:45,387 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:45,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:45,388 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:45,388 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:45,389 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:45,389 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:45,389 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:45,390 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:45,390 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:45,390 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:45,390 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:45,390 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:45,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:45,392 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:45,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:45,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:45,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:45:45,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:45,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:45:45,393 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:45:45,393 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:45:45,394 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:45:45,394 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:45,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:45:45,394 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:45,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:45:45,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:45,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:45:45,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:45,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:45,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:45,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:45,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:45:45,396 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:45:45,397 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:45,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:45:45,397 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:45,397 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:45,398 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_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c727ce378f9c6151587faf5638863d5f3634ffe42c74bcfcd0e6318a1faa4f2e [2021-11-23 16:45:45,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:45,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:45,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:45,849 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:45,850 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:45,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem13_label34.c [2021-11-23 16:45:45,930 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/data/f3055f717/77252d8c3d0c49f597b5a8b2c833d982/FLAG16e284f32 [2021-11-23 16:45:46,944 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:46,944 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/sv-benchmarks/c/eca-rers2012/Problem13_label34.c [2021-11-23 16:45:46,994 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/data/f3055f717/77252d8c3d0c49f597b5a8b2c833d982/FLAG16e284f32 [2021-11-23 16:45:47,367 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/data/f3055f717/77252d8c3d0c49f597b5a8b2c833d982 [2021-11-23 16:45:47,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:47,375 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:47,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:47,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:47,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:47,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:47" (1/1) ... [2021-11-23 16:45:47,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4df67e30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:47, skipping insertion in model container [2021-11-23 16:45:47,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:47" (1/1) ... [2021-11-23 16:45:47,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:47,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:47,928 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_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/sv-benchmarks/c/eca-rers2012/Problem13_label34.c[7959,7972] [2021-11-23 16:45:49,193 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:49,207 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:49,266 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_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/sv-benchmarks/c/eca-rers2012/Problem13_label34.c[7959,7972] [2021-11-23 16:45:50,050 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:50,079 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:50,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50 WrapperNode [2021-11-23 16:45:50,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:50,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:50,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:50,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:50,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:50,188 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:50,472 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5578 [2021-11-23 16:45:50,484 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:50,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:50,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:50,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:50,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:50,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:50,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:50,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:50,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:50,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:50,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:51,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:51,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:51,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:51,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:51,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:51,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:51,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:51,063 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:51,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:51,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:45:51,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:45:51,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:51,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:51,249 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:51,251 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:46:39,604 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:46:39,630 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:46:39,631 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 16:46:39,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:46:39 BoogieIcfgContainer [2021-11-23 16:46:39,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:46:39,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:46:39,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:46:39,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:46:39,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:45:47" (1/3) ... [2021-11-23 16:46:39,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f3d15f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:46:39, skipping insertion in model container [2021-11-23 16:46:39,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (2/3) ... [2021-11-23 16:46:39,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f3d15f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:46:39, skipping insertion in model container [2021-11-23 16:46:39,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:46:39" (3/3) ... [2021-11-23 16:46:39,643 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label34.c [2021-11-23 16:46:39,649 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:46:39,649 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:46:39,708 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:46:39,716 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 16:46:39,716 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:46:39,818 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:39,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 16:46:39,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:39,827 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:39,827 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:39,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:39,835 INFO L85 PathProgramCache]: Analyzing trace with hash -2158734, now seen corresponding path program 1 times [2021-11-23 16:46:39,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:39,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907209047] [2021-11-23 16:46:39,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:39,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:39,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:39,853 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:39,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:46:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:39,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:46:39,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:40,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:40,366 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:40,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907209047] [2021-11-23 16:46:40,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907209047] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:40,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:40,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:46:40,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448776192] [2021-11-23 16:46:40,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:40,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:46:40,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:40,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:46:40,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:46:40,415 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:30,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:30,366 INFO L93 Difference]: Finished difference Result 3072 states and 5735 transitions. [2021-11-23 16:47:30,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:47:30,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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 56 [2021-11-23 16:47:30,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:30,401 INFO L225 Difference]: With dead ends: 3072 [2021-11-23 16:47:30,401 INFO L226 Difference]: Without dead ends: 1895 [2021-11-23 16:47:30,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:30,413 INFO L933 BasicCegarLoop]: 651 mSDtfsCounter, 844 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 3092 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 3498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 3092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.7s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:30,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 790 Invalid, 3498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 3092 Invalid, 0 Unknown, 0 Unchecked, 49.7s Time] [2021-11-23 16:47:30,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-11-23 16:47:30,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1838. [2021-11-23 16:47:30,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1837 states have (on average 1.6614044637996734) internal successors, (3052), 1837 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:30,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 3052 transitions. [2021-11-23 16:47:30,560 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 3052 transitions. Word has length 56 [2021-11-23 16:47:30,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:30,561 INFO L470 AbstractCegarLoop]: Abstraction has 1838 states and 3052 transitions. [2021-11-23 16:47:30,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:30,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 3052 transitions. [2021-11-23 16:47:30,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-23 16:47:30,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:30,567 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:47:30,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:30,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:30,768 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:30,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:30,768 INFO L85 PathProgramCache]: Analyzing trace with hash -817602509, now seen corresponding path program 1 times [2021-11-23 16:47:30,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:30,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998684791] [2021-11-23 16:47:30,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:30,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:30,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:30,772 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:30,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:47:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:30,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:47:30,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:31,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:31,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:31,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998684791] [2021-11-23 16:47:31,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998684791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:31,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:31,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:47:31,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850621746] [2021-11-23 16:47:31,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:31,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:47:31,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:31,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:47:31,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:31,335 INFO L87 Difference]: Start difference. First operand 1838 states and 3052 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:34,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:34,283 INFO L93 Difference]: Finished difference Result 5267 states and 8799 transitions. [2021-11-23 16:48:34,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:34,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 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 122 [2021-11-23 16:48:34,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:34,316 INFO L225 Difference]: With dead ends: 5267 [2021-11-23 16:48:34,316 INFO L226 Difference]: Without dead ends: 3431 [2021-11-23 16:48:34,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:34,321 INFO L933 BasicCegarLoop]: 1028 mSDtfsCounter, 781 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 2709 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 3276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 2709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:34,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 1215 Invalid, 3276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 2709 Invalid, 0 Unknown, 0 Unchecked, 62.8s Time] [2021-11-23 16:48:34,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-11-23 16:48:34,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 3426. [2021-11-23 16:48:34,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 3425 states have (on average 1.4236496350364964) internal successors, (4876), 3425 states have internal predecessors, (4876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:34,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 4876 transitions. [2021-11-23 16:48:34,410 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 4876 transitions. Word has length 122 [2021-11-23 16:48:34,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:34,410 INFO L470 AbstractCegarLoop]: Abstraction has 3426 states and 4876 transitions. [2021-11-23 16:48:34,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:34,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 4876 transitions. [2021-11-23 16:48:34,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-23 16:48:34,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:34,415 INFO L514 BasicCegarLoop]: trace histogram [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 16:48:34,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:34,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:34,627 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:34,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:34,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2103566458, now seen corresponding path program 1 times [2021-11-23 16:48:34,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:34,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538984905] [2021-11-23 16:48:34,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:34,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:34,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:34,632 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:34,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:48:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:34,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:34,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:35,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:35,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:35,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538984905] [2021-11-23 16:48:35,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538984905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:35,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:35,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:48:35,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260368359] [2021-11-23 16:48:35,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:35,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:35,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:35,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:35,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:35,257 INFO L87 Difference]: Start difference. First operand 3426 states and 4876 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:39,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:39,497 INFO L93 Difference]: Finished difference Result 7673 states and 11093 transitions. [2021-11-23 16:49:39,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:49:39,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 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 129 [2021-11-23 16:49:39,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:39,531 INFO L225 Difference]: With dead ends: 7673 [2021-11-23 16:49:39,531 INFO L226 Difference]: Without dead ends: 4249 [2021-11-23 16:49:39,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:49:39,537 INFO L933 BasicCegarLoop]: 1117 mSDtfsCounter, 783 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2552 mSolverCounterSat, 773 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 3325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 773 IncrementalHoareTripleChecker+Valid, 2552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:39,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 1268 Invalid, 3325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [773 Valid, 2552 Invalid, 0 Unknown, 0 Unchecked, 64.1s Time] [2021-11-23 16:49:39,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4249 states. [2021-11-23 16:49:39,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4249 to 4234. [2021-11-23 16:49:39,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 4233 states have (on average 1.2886841483581384) internal successors, (5455), 4233 states have internal predecessors, (5455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:39,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 5455 transitions. [2021-11-23 16:49:39,645 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 5455 transitions. Word has length 129 [2021-11-23 16:49:39,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:39,647 INFO L470 AbstractCegarLoop]: Abstraction has 4234 states and 5455 transitions. [2021-11-23 16:49:39,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:39,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 5455 transitions. [2021-11-23 16:49:39,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-23 16:49:39,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:39,652 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:39,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:39,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:39,865 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:39,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:39,867 INFO L85 PathProgramCache]: Analyzing trace with hash 498195862, now seen corresponding path program 1 times [2021-11-23 16:49:39,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:39,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758847559] [2021-11-23 16:49:39,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:39,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:39,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:39,872 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:39,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 16:49:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:40,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:49:40,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:42,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:46,984 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:46,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758847559] [2021-11-23 16:49:46,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758847559] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:46,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [340988445] [2021-11-23 16:49:46,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:46,985 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:49:46,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:49:46,998 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:49:47,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-23 16:49:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:47,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:49:47,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:50,747 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:50,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:50,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [340988445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:50,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:49:50,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4] total 10 [2021-11-23 16:49:50,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432827424] [2021-11-23 16:49:50,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:50,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:49:50,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:50,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:49:50,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:49:50,750 INFO L87 Difference]: Start difference. First operand 4234 states and 5455 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:02,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:02,254 INFO L93 Difference]: Finished difference Result 10359 states and 13829 transitions. [2021-11-23 16:51:02,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:51:02,263 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 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 161 [2021-11-23 16:51:02,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:02,296 INFO L225 Difference]: With dead ends: 10359 [2021-11-23 16:51:02,296 INFO L226 Difference]: Without dead ends: 6914 [2021-11-23 16:51:02,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:51:02,303 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 2644 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 4031 mSolverCounterSat, 1671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2644 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 5702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1671 IncrementalHoareTripleChecker+Valid, 4031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:02,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2644 Valid, 438 Invalid, 5702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1671 Valid, 4031 Invalid, 0 Unknown, 0 Unchecked, 71.3s Time] [2021-11-23 16:51:02,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6914 states. [2021-11-23 16:51:02,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6914 to 6626. [2021-11-23 16:51:02,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6626 states, 6625 states have (on average 1.2870943396226415) internal successors, (8527), 6625 states have internal predecessors, (8527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:02,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6626 states to 6626 states and 8527 transitions. [2021-11-23 16:51:02,497 INFO L78 Accepts]: Start accepts. Automaton has 6626 states and 8527 transitions. Word has length 161 [2021-11-23 16:51:02,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:02,499 INFO L470 AbstractCegarLoop]: Abstraction has 6626 states and 8527 transitions. [2021-11-23 16:51:02,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:02,503 INFO L276 IsEmpty]: Start isEmpty. Operand 6626 states and 8527 transitions. [2021-11-23 16:51:02,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-23 16:51:02,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:02,509 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 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 16:51:02,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:02,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:02,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:02,911 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:02,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:02,912 INFO L85 PathProgramCache]: Analyzing trace with hash -720755538, now seen corresponding path program 1 times [2021-11-23 16:51:02,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:02,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326480197] [2021-11-23 16:51:02,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:02,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:02,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:02,915 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:02,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:51:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:03,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:51:03,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-23 16:51:03,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:03,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:03,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326480197] [2021-11-23 16:51:03,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326480197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:03,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:03,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:51:03,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504478504] [2021-11-23 16:51:03,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:03,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:51:03,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:03,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:51:03,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:51:03,915 INFO L87 Difference]: Start difference. First operand 6626 states and 8527 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:53,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:53,470 INFO L93 Difference]: Finished difference Result 12463 states and 16245 transitions. [2021-11-23 16:51:53,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:51:53,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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 210 [2021-11-23 16:51:53,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:53,508 INFO L225 Difference]: With dead ends: 12463 [2021-11-23 16:51:53,508 INFO L226 Difference]: Without dead ends: 6626 [2021-11-23 16:51:53,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:51:53,515 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2540 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:53,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1212 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2540 Invalid, 0 Unknown, 0 Unchecked, 49.4s Time] [2021-11-23 16:51:53,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6626 states. [2021-11-23 16:51:53,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6626 to 6626. [2021-11-23 16:51:53,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6626 states, 6625 states have (on average 1.2863396226415094) internal successors, (8522), 6625 states have internal predecessors, (8522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:53,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6626 states to 6626 states and 8522 transitions. [2021-11-23 16:51:53,654 INFO L78 Accepts]: Start accepts. Automaton has 6626 states and 8522 transitions. Word has length 210 [2021-11-23 16:51:53,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:53,654 INFO L470 AbstractCegarLoop]: Abstraction has 6626 states and 8522 transitions. [2021-11-23 16:51:53,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:53,655 INFO L276 IsEmpty]: Start isEmpty. Operand 6626 states and 8522 transitions. [2021-11-23 16:51:53,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-23 16:51:53,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:53,659 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 16:51:53,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:53,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:53,873 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:53,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:53,873 INFO L85 PathProgramCache]: Analyzing trace with hash -162053639, now seen corresponding path program 1 times [2021-11-23 16:51:53,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:53,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431202875] [2021-11-23 16:51:53,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:53,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:53,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:53,876 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:53,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 16:51:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:54,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:51:54,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-23 16:51:54,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:54,760 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:54,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431202875] [2021-11-23 16:51:54,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431202875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:54,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:54,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:51:54,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042911088] [2021-11-23 16:51:54,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:54,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:51:54,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:54,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:51:54,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:51:54,763 INFO L87 Difference]: Start difference. First operand 6626 states and 8522 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:40,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:40,293 INFO L93 Difference]: Finished difference Result 13248 states and 17506 transitions. [2021-11-23 16:52:40,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:52:40,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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 217 [2021-11-23 16:52:40,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:40,324 INFO L225 Difference]: With dead ends: 13248 [2021-11-23 16:52:40,325 INFO L226 Difference]: Without dead ends: 7411 [2021-11-23 16:52:40,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:40,331 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 889 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 762 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 3072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 762 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:40,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 1007 Invalid, 3072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [762 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 45.4s Time] [2021-11-23 16:52:40,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7411 states. [2021-11-23 16:52:40,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7411 to 7409. [2021-11-23 16:52:40,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7409 states, 7408 states have (on average 1.1625269978401729) internal successors, (8612), 7408 states have internal predecessors, (8612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:40,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7409 states to 7409 states and 8612 transitions. [2021-11-23 16:52:40,469 INFO L78 Accepts]: Start accepts. Automaton has 7409 states and 8612 transitions. Word has length 217 [2021-11-23 16:52:40,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:40,470 INFO L470 AbstractCegarLoop]: Abstraction has 7409 states and 8612 transitions. [2021-11-23 16:52:40,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:40,471 INFO L276 IsEmpty]: Start isEmpty. Operand 7409 states and 8612 transitions. [2021-11-23 16:52:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-23 16:52:40,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:40,475 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:40,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:40,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:40,690 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:40,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:40,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1706381531, now seen corresponding path program 1 times [2021-11-23 16:52:40,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:40,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542384] [2021-11-23 16:52:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:40,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:40,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:40,693 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:40,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 16:52:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:40,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:52:40,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:41,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:52:41,333 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:41,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542384] [2021-11-23 16:52:41,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:52:41,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:52:41,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:52:41,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945882499] [2021-11-23 16:52:41,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:52:41,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:52:41,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:41,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:52:41,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:52:41,337 INFO L87 Difference]: Start difference. First operand 7409 states and 8612 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:38,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:53:38,006 INFO L93 Difference]: Finished difference Result 17996 states and 21302 transitions. [2021-11-23 16:53:38,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:53:38,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-11-23 16:53:38,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:53:38,035 INFO L225 Difference]: With dead ends: 17996 [2021-11-23 16:53:38,035 INFO L226 Difference]: Without dead ends: 10585 [2021-11-23 16:53:38,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:53:38,042 INFO L933 BasicCegarLoop]: 1758 mSDtfsCounter, 816 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 1901 SdHoareTripleChecker+Invalid, 3257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 725 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:53:38,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [816 Valid, 1901 Invalid, 3257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [725 Valid, 2532 Invalid, 0 Unknown, 0 Unchecked, 56.5s Time] [2021-11-23 16:53:38,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10585 states. [2021-11-23 16:53:38,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10585 to 10564. [2021-11-23 16:53:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10564 states, 10563 states have (on average 1.136324907696677) internal successors, (12003), 10563 states have internal predecessors, (12003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:38,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10564 states to 10564 states and 12003 transitions. [2021-11-23 16:53:38,194 INFO L78 Accepts]: Start accepts. Automaton has 10564 states and 12003 transitions. Word has length 225 [2021-11-23 16:53:38,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:53:38,194 INFO L470 AbstractCegarLoop]: Abstraction has 10564 states and 12003 transitions. [2021-11-23 16:53:38,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:53:38,195 INFO L276 IsEmpty]: Start isEmpty. Operand 10564 states and 12003 transitions. [2021-11-23 16:53:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-23 16:53:38,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:53:38,200 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:53:38,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:53:38,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:53:38,414 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:53:38,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:53:38,414 INFO L85 PathProgramCache]: Analyzing trace with hash 2013422099, now seen corresponding path program 1 times [2021-11-23 16:53:38,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:53:38,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837531458] [2021-11-23 16:53:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:38,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:53:38,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:53:38,417 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:53:38,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:53:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:38,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:53:38,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:53:41,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:53:55,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:55,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837531458] [2021-11-23 16:53:55,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837531458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:55,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1289612758] [2021-11-23 16:53:55,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:55,242 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:53:55,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:53:55,243 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:53:55,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 16:53:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:55,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:53:55,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-23 16:53:56,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:53:56,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1289612758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:53:56,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:53:56,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 8 [2021-11-23 16:53:56,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674404765] [2021-11-23 16:53:56,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:53:56,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:53:56,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:53:56,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:53:56,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:53:56,179 INFO L87 Difference]: Start difference. First operand 10564 states and 12003 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:44,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:54:44,189 INFO L93 Difference]: Finished difference Result 27428 states and 31523 transitions. [2021-11-23 16:54:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:54:44,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 270 [2021-11-23 16:54:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:54:44,232 INFO L225 Difference]: With dead ends: 27428 [2021-11-23 16:54:44,233 INFO L226 Difference]: Without dead ends: 16866 [2021-11-23 16:54:44,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 807 GetRequests, 801 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:54:44,246 INFO L933 BasicCegarLoop]: 1635 mSDtfsCounter, 965 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 2400 mSolverCounterSat, 820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 1770 SdHoareTripleChecker+Invalid, 3220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 820 IncrementalHoareTripleChecker+Valid, 2400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:54:44,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [965 Valid, 1770 Invalid, 3220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [820 Valid, 2400 Invalid, 0 Unknown, 0 Unchecked, 47.8s Time] [2021-11-23 16:54:44,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16866 states. [2021-11-23 16:54:44,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16866 to 16077. [2021-11-23 16:54:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16077 states, 16076 states have (on average 1.1247822841502861) internal successors, (18082), 16076 states have internal predecessors, (18082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:44,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16077 states to 16077 states and 18082 transitions. [2021-11-23 16:54:44,534 INFO L78 Accepts]: Start accepts. Automaton has 16077 states and 18082 transitions. Word has length 270 [2021-11-23 16:54:44,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:54:44,535 INFO L470 AbstractCegarLoop]: Abstraction has 16077 states and 18082 transitions. [2021-11-23 16:54:44,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:54:44,535 INFO L276 IsEmpty]: Start isEmpty. Operand 16077 states and 18082 transitions. [2021-11-23 16:54:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-11-23 16:54:44,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:54:44,539 INFO L514 BasicCegarLoop]: trace histogram [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, 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 16:54:44,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:44,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:54:44,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:54:44,952 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:54:44,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:54:44,952 INFO L85 PathProgramCache]: Analyzing trace with hash 808482331, now seen corresponding path program 1 times [2021-11-23 16:54:44,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:54:44,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097598804] [2021-11-23 16:54:44,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:44,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:54:44,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:54:44,955 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:54:44,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 16:54:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:45,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:54:45,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 252 proven. 88 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-23 16:54:46,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 252 proven. 88 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-23 16:54:48,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:54:48,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097598804] [2021-11-23 16:54:48,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097598804] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:48,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [603002394] [2021-11-23 16:54:48,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:54:48,506 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:54:48,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:54:48,507 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:54:48,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 16:54:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:54:48,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:54:48,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:54:49,806 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-11-23 16:54:49,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:54:49,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [603002394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:54:49,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:54:49,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2021-11-23 16:54:49,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868735901] [2021-11-23 16:54:49,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:54:49,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:54:49,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:49,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:54:49,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:54:49,809 INFO L87 Difference]: Start difference. First operand 16077 states and 18082 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:45,474 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:56:14,305 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:57:00,606 WARN L534 Checker$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 16:57:10,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:57:10,812 INFO L93 Difference]: Finished difference Result 45593 states and 51965 transitions. [2021-11-23 16:57:10,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:57:10,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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 314 [2021-11-23 16:57:10,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:57:10,860 INFO L225 Difference]: With dead ends: 45593 [2021-11-23 16:57:10,860 INFO L226 Difference]: Without dead ends: 29516 [2021-11-23 16:57:10,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 941 GetRequests, 934 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:57:10,876 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 1875 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 5126 mSolverCounterSat, 2171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1875 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 7297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2171 IncrementalHoareTripleChecker+Valid, 5126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 140.7s IncrementalHoareTripleChecker+Time [2021-11-23 16:57:10,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1875 Valid, 320 Invalid, 7297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2171 Valid, 5126 Invalid, 0 Unknown, 0 Unchecked, 140.7s Time] [2021-11-23 16:57:10,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29516 states. [2021-11-23 16:57:11,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29516 to 22377. [2021-11-23 16:57:11,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22377 states, 22376 states have (on average 1.1157490168037183) internal successors, (24966), 22376 states have internal predecessors, (24966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22377 states to 22377 states and 24966 transitions. [2021-11-23 16:57:11,292 INFO L78 Accepts]: Start accepts. Automaton has 22377 states and 24966 transitions. Word has length 314 [2021-11-23 16:57:11,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:57:11,293 INFO L470 AbstractCegarLoop]: Abstraction has 22377 states and 24966 transitions. [2021-11-23 16:57:11,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:11,294 INFO L276 IsEmpty]: Start isEmpty. Operand 22377 states and 24966 transitions. [2021-11-23 16:57:11,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2021-11-23 16:57:11,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:57:11,311 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:57:11,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:11,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-23 16:57:11,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:57:11,714 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:57:11,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:57:11,714 INFO L85 PathProgramCache]: Analyzing trace with hash -142497813, now seen corresponding path program 1 times [2021-11-23 16:57:11,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:57:11,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664821404] [2021-11-23 16:57:11,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:11,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:57:11,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:57:11,719 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:57:11,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 16:57:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:12,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:57:12,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 322 proven. 90 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-23 16:57:15,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 322 proven. 90 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-23 16:57:28,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:57:28,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664821404] [2021-11-23 16:57:28,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1664821404] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:28,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [33393589] [2021-11-23 16:57:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:28,348 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:57:28,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:57:28,349 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:57:28,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 16:57:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:28,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:57:28,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-11-23 16:57:29,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:57:29,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [33393589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:57:29,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:57:29,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 8 [2021-11-23 16:57:29,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785956737] [2021-11-23 16:57:29,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:57:29,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:57:29,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:57:29,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:57:29,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:57:29,413 INFO L87 Difference]: Start difference. First operand 22377 states and 24966 transitions. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:26,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:58:26,398 INFO L93 Difference]: Finished difference Result 50265 states and 56890 transitions. [2021-11-23 16:58:26,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:58:26,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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 569 [2021-11-23 16:58:26,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:58:26,441 INFO L225 Difference]: With dead ends: 50265 [2021-11-23 16:58:26,442 INFO L226 Difference]: Without dead ends: 28677 [2021-11-23 16:58:26,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1704 GetRequests, 1698 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:58:26,455 INFO L933 BasicCegarLoop]: 1693 mSDtfsCounter, 827 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 733 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 1834 SdHoareTripleChecker+Invalid, 3212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 733 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.7s IncrementalHoareTripleChecker+Time [2021-11-23 16:58:26,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 1834 Invalid, 3212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [733 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 56.7s Time] [2021-11-23 16:58:26,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28677 states. [2021-11-23 16:58:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28677 to 27099. [2021-11-23 16:58:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27099 states, 27098 states have (on average 1.104214333161119) internal successors, (29922), 27098 states have internal predecessors, (29922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:26,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27099 states to 27099 states and 29922 transitions. [2021-11-23 16:58:26,917 INFO L78 Accepts]: Start accepts. Automaton has 27099 states and 29922 transitions. Word has length 569 [2021-11-23 16:58:26,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:58:26,919 INFO L470 AbstractCegarLoop]: Abstraction has 27099 states and 29922 transitions. [2021-11-23 16:58:26,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:26,919 INFO L276 IsEmpty]: Start isEmpty. Operand 27099 states and 29922 transitions. [2021-11-23 16:58:26,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 818 [2021-11-23 16:58:26,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:58:26,960 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:58:26,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 16:58:27,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-23 16:58:27,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:58:27,363 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:58:27,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:58:27,363 INFO L85 PathProgramCache]: Analyzing trace with hash -746700581, now seen corresponding path program 1 times [2021-11-23 16:58:27,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:58:27,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209844815] [2021-11-23 16:58:27,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:27,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:58:27,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:58:27,374 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:58:27,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 16:58:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:27,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:58:27,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 436 proven. 88 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-23 16:58:30,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 436 proven. 88 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-23 16:58:33,098 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:58:33,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209844815] [2021-11-23 16:58:33,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209844815] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:33,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [358505588] [2021-11-23 16:58:33,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:33,099 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:58:33,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:58:33,102 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:58:33,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 16:58:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:34,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:58:34,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 436 proven. 88 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-23 16:58:36,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 436 proven. 88 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-23 16:58:39,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [358505588] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:39,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853796374] [2021-11-23 16:58:39,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:39,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:58:39,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:58:39,023 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:58:39,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9999cd5-8cbb-46e1-bfa5-7a96daffeb8a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 16:58:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:39,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:58:39,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 215 proven. 257 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-11-23 16:58:42,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 472 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-11-23 16:58:44,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853796374] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 16:58:44,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 16:58:44,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3, 3, 3] total 9 [2021-11-23 16:58:44,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99944672] [2021-11-23 16:58:44,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:58:44,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:58:44,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:58:44,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:58:44,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:58:44,467 INFO L87 Difference]: Start difference. First operand 27099 states and 29922 transitions. Second operand has 3 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:59,634 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []