./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label39.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_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/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_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label39.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/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_5a878033-8ce3-4754-b3aa-1260324ed706/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 4f59006dbd942eedfc81642ab0c427fb651af56da6014792192339fc11dd9e46 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:20:12,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:20:12,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:20:12,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:20:12,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:20:12,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:20:12,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:20:12,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:20:12,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:20:12,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:20:12,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:20:12,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:20:12,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:20:12,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:20:12,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:20:12,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:20:12,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:20:12,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:20:12,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:20:12,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:20:12,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:20:12,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:20:12,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:20:12,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:20:12,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:20:12,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:20:12,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:20:12,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:20:12,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:20:12,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:20:12,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:20:12,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:20:12,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:20:12,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:20:12,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:20:12,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:20:12,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:20:12,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:20:12,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:20:12,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:20:12,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:20:12,528 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:20:12,561 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:20:12,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:20:12,562 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:20:12,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:20:12,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:20:12,564 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:20:12,564 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:20:12,565 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:20:12,565 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:20:12,565 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:20:12,566 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:20:12,566 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:20:12,567 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:20:12,567 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:20:12,567 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:20:12,568 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:20:12,568 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:20:12,568 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:20:12,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:20:12,570 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:20:12,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:20:12,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:20:12,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:20:12,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:20:12,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:20:12,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:20:12,572 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:20:12,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:20:12,573 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:20:12,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:20:12,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:20:12,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:20:12,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:20:12,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:20:12,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:20:12,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:20:12,576 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:20:12,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:20:12,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:20:12,577 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:20:12,577 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:20:12,578 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_5a878033-8ce3-4754-b3aa-1260324ed706/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f59006dbd942eedfc81642ab0c427fb651af56da6014792192339fc11dd9e46 [2021-11-23 17:20:12,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:20:12,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:20:12,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:20:12,964 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:20:12,965 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:20:12,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem19_label39.c [2021-11-23 17:20:13,053 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/data/55b681a7e/44383509108f4ba0a8aa8f65769656af/FLAG0bb894c26 [2021-11-23 17:20:14,185 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:20:14,185 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/sv-benchmarks/c/eca-rers2012/Problem19_label39.c [2021-11-23 17:20:14,236 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/data/55b681a7e/44383509108f4ba0a8aa8f65769656af/FLAG0bb894c26 [2021-11-23 17:20:14,455 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/data/55b681a7e/44383509108f4ba0a8aa8f65769656af [2021-11-23 17:20:14,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:20:14,462 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:20:14,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:20:14,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:20:14,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:20:14,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:20:14" (1/1) ... [2021-11-23 17:20:14,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3191e05c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:14, skipping insertion in model container [2021-11-23 17:20:14,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:20:14" (1/1) ... [2021-11-23 17:20:14,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:20:14,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:20:15,311 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_5a878033-8ce3-4754-b3aa-1260324ed706/sv-benchmarks/c/eca-rers2012/Problem19_label39.c[4313,4326] [2021-11-23 17:20:17,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:20:17,520 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:20:17,571 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_5a878033-8ce3-4754-b3aa-1260324ed706/sv-benchmarks/c/eca-rers2012/Problem19_label39.c[4313,4326] [2021-11-23 17:20:18,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:20:18,874 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:20:18,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:18 WrapperNode [2021-11-23 17:20:18,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:20:18,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:20:18,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:20:18,877 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:20:18,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:18" (1/1) ... [2021-11-23 17:20:19,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:18" (1/1) ... [2021-11-23 17:20:20,368 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-11-23 17:20:20,369 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:20:20,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:20:20,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:20:20,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:20:20,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:18" (1/1) ... [2021-11-23 17:20:20,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:18" (1/1) ... [2021-11-23 17:20:20,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:18" (1/1) ... [2021-11-23 17:20:20,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:18" (1/1) ... [2021-11-23 17:20:21,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:18" (1/1) ... [2021-11-23 17:20:21,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:18" (1/1) ... [2021-11-23 17:20:21,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:18" (1/1) ... [2021-11-23 17:20:21,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:20:21,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:20:21,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:20:21,746 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:20:21,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:18" (1/1) ... [2021-11-23 17:20:21,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:20:21,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:20:21,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:20:21,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:20:21,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:20:21,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:20:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:20:21,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:20:21,931 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:20:21,933 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:20:33,241 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:20:33,337 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:20:33,343 INFO L158 Benchmark]: Toolchain (without parser) took 18880.23ms. Allocated memory was 86.0MB in the beginning and 2.2GB in the end (delta: 2.1GB). Free memory was 39.6MB in the beginning and 1.6GB in the end (delta: -1.6GB). Peak memory consumption was 532.8MB. Max. memory is 16.1GB. [2021-11-23 17:20:33,344 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 86.0MB. Free memory is still 65.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:20:33,345 INFO L158 Benchmark]: CACSL2BoogieTranslator took 4410.86ms. Allocated memory was 86.0MB in the beginning and 281.0MB in the end (delta: 195.0MB). Free memory was 39.6MB in the beginning and 189.1MB in the end (delta: -149.4MB). Peak memory consumption was 114.3MB. Max. memory is 16.1GB. [2021-11-23 17:20:33,347 INFO L158 Benchmark]: Boogie Procedure Inliner took 1496.35ms. Allocated memory was 281.0MB in the beginning and 562.0MB in the end (delta: 281.0MB). Free memory was 189.1MB in the beginning and 370.2MB in the end (delta: -181.1MB). Peak memory consumption was 174.1MB. Max. memory is 16.1GB. [2021-11-23 17:20:33,348 INFO L158 Benchmark]: Boogie Preprocessor took 1368.92ms. Allocated memory is still 562.0MB. Free memory was 370.2MB in the beginning and 321.6MB in the end (delta: 48.6MB). Peak memory consumption was 86.0MB. Max. memory is 16.1GB. [2021-11-23 17:20:33,349 INFO L158 Benchmark]: RCFGBuilder took 11595.52ms. Allocated memory was 562.0MB in the beginning and 2.2GB in the end (delta: 1.6GB). Free memory was 321.6MB in the beginning and 1.6GB in the end (delta: -1.3GB). Peak memory consumption was 340.9MB. Max. memory is 16.1GB. [2021-11-23 17:20:33,353 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 86.0MB. Free memory is still 65.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 4410.86ms. Allocated memory was 86.0MB in the beginning and 281.0MB in the end (delta: 195.0MB). Free memory was 39.6MB in the beginning and 189.1MB in the end (delta: -149.4MB). Peak memory consumption was 114.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 1496.35ms. Allocated memory was 281.0MB in the beginning and 562.0MB in the end (delta: 281.0MB). Free memory was 189.1MB in the beginning and 370.2MB in the end (delta: -181.1MB). Peak memory consumption was 174.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 1368.92ms. Allocated memory is still 562.0MB. Free memory was 370.2MB in the beginning and 321.6MB in the end (delta: 48.6MB). Peak memory consumption was 86.0MB. Max. memory is 16.1GB. * RCFGBuilder took 11595.52ms. Allocated memory was 562.0MB in the beginning and 2.2GB in the end (delta: 1.6GB). Free memory was 321.6MB in the beginning and 1.6GB in the end (delta: -1.3GB). Peak memory consumption was 340.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:20:33,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/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_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/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_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label39.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/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_5a878033-8ce3-4754-b3aa-1260324ed706/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 4f59006dbd942eedfc81642ab0c427fb651af56da6014792192339fc11dd9e46 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:20:36,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:20:36,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:20:36,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:20:36,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:20:36,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:20:36,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:20:36,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:20:36,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:20:36,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:20:36,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:20:36,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:20:36,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:20:36,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:20:36,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:20:36,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:20:36,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:20:36,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:20:36,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:20:36,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:20:36,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:20:36,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:20:36,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:20:36,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:20:36,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:20:36,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:20:36,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:20:36,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:20:36,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:20:36,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:20:36,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:20:36,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:20:36,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:20:36,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:20:36,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:20:36,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:20:36,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:20:36,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:20:36,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:20:36,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:20:36,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:20:36,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:20:36,537 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:20:36,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:20:36,538 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:20:36,538 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:20:36,539 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:20:36,539 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:20:36,540 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:20:36,540 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:20:36,540 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:20:36,541 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:20:36,541 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:20:36,541 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:20:36,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:20:36,543 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:20:36,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:20:36,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:20:36,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:20:36,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:20:36,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:20:36,545 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:20:36,545 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:20:36,545 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:20:36,545 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:20:36,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:20:36,546 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:20:36,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:20:36,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:20:36,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:20:36,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:20:36,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:20:36,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:20:36,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:20:36,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:20:36,548 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:20:36,548 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:20:36,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:20:36,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:20:36,549 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:20:36,549 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_5a878033-8ce3-4754-b3aa-1260324ed706/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f59006dbd942eedfc81642ab0c427fb651af56da6014792192339fc11dd9e46 [2021-11-23 17:20:36,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:20:36,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:20:36,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:20:36,989 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:20:36,989 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:20:36,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem19_label39.c [2021-11-23 17:20:37,072 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/data/11a500fdd/79b913b44881445cb843c9cd081bb976/FLAG4b37b2f1f [2021-11-23 17:20:38,455 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:20:38,457 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/sv-benchmarks/c/eca-rers2012/Problem19_label39.c [2021-11-23 17:20:38,535 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/data/11a500fdd/79b913b44881445cb843c9cd081bb976/FLAG4b37b2f1f [2021-11-23 17:20:38,585 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/data/11a500fdd/79b913b44881445cb843c9cd081bb976 [2021-11-23 17:20:38,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:20:38,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:20:38,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:20:38,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:20:38,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:20:38,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:20:38" (1/1) ... [2021-11-23 17:20:38,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bd6de0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:38, skipping insertion in model container [2021-11-23 17:20:38,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:20:38" (1/1) ... [2021-11-23 17:20:38,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:20:38,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:20:39,407 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_5a878033-8ce3-4754-b3aa-1260324ed706/sv-benchmarks/c/eca-rers2012/Problem19_label39.c[4313,4326] [2021-11-23 17:20:42,069 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:20:42,085 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:20:42,118 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_5a878033-8ce3-4754-b3aa-1260324ed706/sv-benchmarks/c/eca-rers2012/Problem19_label39.c[4313,4326] [2021-11-23 17:20:43,486 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:20:43,550 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:20:43,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:43 WrapperNode [2021-11-23 17:20:43,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:20:43,552 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:20:43,552 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:20:43,552 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:20:43,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:43" (1/1) ... [2021-11-23 17:20:43,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:43" (1/1) ... [2021-11-23 17:20:44,254 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9418 [2021-11-23 17:20:44,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:20:44,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:20:44,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:20:44,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:20:44,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:43" (1/1) ... [2021-11-23 17:20:44,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:43" (1/1) ... [2021-11-23 17:20:44,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:43" (1/1) ... [2021-11-23 17:20:44,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:43" (1/1) ... [2021-11-23 17:20:44,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:43" (1/1) ... [2021-11-23 17:20:44,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:43" (1/1) ... [2021-11-23 17:20:44,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:43" (1/1) ... [2021-11-23 17:20:44,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:20:44,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:20:44,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:20:44,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:20:44,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:43" (1/1) ... [2021-11-23 17:20:44,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:20:45,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:20:45,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:20:45,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:20:45,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:20:45,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:20:45,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:20:45,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:20:45,253 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:20:45,255 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:21:58,857 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:21:58,895 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:21:58,896 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:21:58,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:21:58 BoogieIcfgContainer [2021-11-23 17:21:58,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:21:58,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:21:58,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:21:58,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:21:58,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:20:38" (1/3) ... [2021-11-23 17:21:58,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1228c307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:21:58, skipping insertion in model container [2021-11-23 17:21:58,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:20:43" (2/3) ... [2021-11-23 17:21:58,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1228c307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:21:58, skipping insertion in model container [2021-11-23 17:21:58,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:21:58" (3/3) ... [2021-11-23 17:21:58,912 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label39.c [2021-11-23 17:21:58,919 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:21:58,919 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:21:58,992 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:21:59,001 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:21:59,001 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:21:59,068 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:59,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 17:21:59,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:59,077 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] [2021-11-23 17:21:59,078 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:59,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:59,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1843609039, now seen corresponding path program 1 times [2021-11-23 17:21:59,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:59,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244292873] [2021-11-23 17:21:59,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:59,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:59,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:59,111 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:59,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:21:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:59,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:21:59,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:59,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:59,526 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:59,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244292873] [2021-11-23 17:21:59,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244292873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:59,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:59,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:21:59,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392796154] [2021-11-23 17:21:59,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:59,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:21:59,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:59,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:21:59,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:21:59,590 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:36,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:36,216 INFO L93 Difference]: Finished difference Result 4912 states and 9308 transitions. [2021-11-23 17:23:36,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:23:36,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 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 31 [2021-11-23 17:23:36,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:36,282 INFO L225 Difference]: With dead ends: 4912 [2021-11-23 17:23:36,282 INFO L226 Difference]: Without dead ends: 3100 [2021-11-23 17:23:36,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:23:36,299 INFO L933 BasicCegarLoop]: 1541 mSDtfsCounter, 1452 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 4505 mSolverCounterSat, 1199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 1746 SdHoareTripleChecker+Invalid, 5704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1199 IncrementalHoareTripleChecker+Valid, 4505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:36,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1452 Valid, 1746 Invalid, 5704 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1199 Valid, 4505 Invalid, 0 Unknown, 0 Unchecked, 96.2s Time] [2021-11-23 17:23:36,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-11-23 17:23:36,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 3098. [2021-11-23 17:23:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3098 states, 3097 states have (on average 1.5715208266063934) internal successors, (4867), 3097 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:36,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3098 states to 3098 states and 4867 transitions. [2021-11-23 17:23:36,622 INFO L78 Accepts]: Start accepts. Automaton has 3098 states and 4867 transitions. Word has length 31 [2021-11-23 17:23:36,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:36,623 INFO L470 AbstractCegarLoop]: Abstraction has 3098 states and 4867 transitions. [2021-11-23 17:23:36,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:36,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3098 states and 4867 transitions. [2021-11-23 17:23:36,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:23:36,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:36,631 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:23:36,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:36,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:36,853 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:23:36,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:36,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2039688742, now seen corresponding path program 1 times [2021-11-23 17:23:36,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:36,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707817629] [2021-11-23 17:23:36,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:36,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:36,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:36,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:36,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:23:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:37,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:23:37,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:37,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:37,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:37,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707817629] [2021-11-23 17:23:37,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707817629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:37,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:37,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:23:37,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314458218] [2021-11-23 17:23:37,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:37,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:23:37,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:37,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:23:37,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:23:37,600 INFO L87 Difference]: Start difference. First operand 3098 states and 4867 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:35,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:35,477 INFO L93 Difference]: Finished difference Result 9074 states and 14292 transitions. [2021-11-23 17:25:35,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:35,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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 100 [2021-11-23 17:25:35,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:35,527 INFO L225 Difference]: With dead ends: 9074 [2021-11-23 17:25:35,527 INFO L226 Difference]: Without dead ends: 5978 [2021-11-23 17:25:35,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:35,534 INFO L933 BasicCegarLoop]: 716 mSDtfsCounter, 2516 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 5282 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2516 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 5547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 5282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 117.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:35,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2516 Valid, 989 Invalid, 5547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 5282 Invalid, 0 Unknown, 0 Unchecked, 117.6s Time] [2021-11-23 17:25:35,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5978 states. [2021-11-23 17:25:35,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5978 to 5975. [2021-11-23 17:25:35,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5975 states, 5974 states have (on average 1.5219283562102444) internal successors, (9092), 5974 states have internal predecessors, (9092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:35,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5975 states to 5975 states and 9092 transitions. [2021-11-23 17:25:35,716 INFO L78 Accepts]: Start accepts. Automaton has 5975 states and 9092 transitions. Word has length 100 [2021-11-23 17:25:35,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:35,717 INFO L470 AbstractCegarLoop]: Abstraction has 5975 states and 9092 transitions. [2021-11-23 17:25:35,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:35,718 INFO L276 IsEmpty]: Start isEmpty. Operand 5975 states and 9092 transitions. [2021-11-23 17:25:35,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-23 17:25:35,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:35,722 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:35,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:35,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:35,937 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:35,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:35,938 INFO L85 PathProgramCache]: Analyzing trace with hash 742571847, now seen corresponding path program 1 times [2021-11-23 17:25:35,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:35,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164637564] [2021-11-23 17:25:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:35,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:35,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:35,944 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:35,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:25:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:36,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:36,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:36,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:36,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:36,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164637564] [2021-11-23 17:25:36,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164637564] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:36,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:36,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:25:36,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284522076] [2021-11-23 17:25:36,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:36,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:36,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:36,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:36,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:36,651 INFO L87 Difference]: Start difference. First operand 5975 states and 9092 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 17:27:14,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:14,684 INFO L93 Difference]: Finished difference Result 14710 states and 22259 transitions. [2021-11-23 17:27:14,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:27:14,685 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 17:27:14,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:14,740 INFO L225 Difference]: With dead ends: 14710 [2021-11-23 17:27:14,741 INFO L226 Difference]: Without dead ends: 8737 [2021-11-23 17:27:14,750 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 17:27:14,752 INFO L933 BasicCegarLoop]: 1705 mSDtfsCounter, 1450 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 4770 mSolverCounterSat, 722 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1450 SdHoareTripleChecker+Valid, 1925 SdHoareTripleChecker+Invalid, 5492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 722 IncrementalHoareTripleChecker+Valid, 4770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:14,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1450 Valid, 1925 Invalid, 5492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [722 Valid, 4770 Invalid, 0 Unknown, 0 Unchecked, 97.8s Time] [2021-11-23 17:27:14,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8737 states. [2021-11-23 17:27:14,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8737 to 8719. [2021-11-23 17:27:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8719 states, 8718 states have (on average 1.4050240880935994) internal successors, (12249), 8718 states have internal predecessors, (12249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:14,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8719 states to 8719 states and 12249 transitions. [2021-11-23 17:27:14,984 INFO L78 Accepts]: Start accepts. Automaton has 8719 states and 12249 transitions. Word has length 122 [2021-11-23 17:27:14,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:14,985 INFO L470 AbstractCegarLoop]: Abstraction has 8719 states and 12249 transitions. [2021-11-23 17:27:14,985 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 17:27:14,985 INFO L276 IsEmpty]: Start isEmpty. Operand 8719 states and 12249 transitions. [2021-11-23 17:27:14,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-23 17:27:14,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:14,996 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:15,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 17:27:15,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:15,210 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:15,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:15,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1471607882, now seen corresponding path program 1 times [2021-11-23 17:27:15,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:15,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845392622] [2021-11-23 17:27:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:15,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:15,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:15,218 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:15,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:27:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:15,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:27:15,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:15,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:27:15,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:15,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845392622] [2021-11-23 17:27:15,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845392622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:27:15,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:27:15,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:27:15,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747545624] [2021-11-23 17:27:15,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:16,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:27:16,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:16,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:27:16,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:27:16,001 INFO L87 Difference]: Start difference. First operand 8719 states and 12249 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:28:52,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:28:52,152 INFO L93 Difference]: Finished difference Result 22907 states and 31678 transitions. [2021-11-23 17:28:52,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:28:52,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 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 128 [2021-11-23 17:28:52,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:28:52,252 INFO L225 Difference]: With dead ends: 22907 [2021-11-23 17:28:52,252 INFO L226 Difference]: Without dead ends: 14190 [2021-11-23 17:28:52,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:28:52,277 INFO L933 BasicCegarLoop]: 1645 mSDtfsCounter, 1375 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 4352 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 5272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 4352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:28:52,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1375 Valid, 1919 Invalid, 5272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 4352 Invalid, 0 Unknown, 0 Unchecked, 95.9s Time] [2021-11-23 17:28:52,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14190 states. [2021-11-23 17:28:52,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14190 to 14186. [2021-11-23 17:28:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14186 states, 14185 states have (on average 1.266055692633063) internal successors, (17959), 14185 states have internal predecessors, (17959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:28:52,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14186 states to 14186 states and 17959 transitions. [2021-11-23 17:28:52,640 INFO L78 Accepts]: Start accepts. Automaton has 14186 states and 17959 transitions. Word has length 128 [2021-11-23 17:28:52,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:28:52,642 INFO L470 AbstractCegarLoop]: Abstraction has 14186 states and 17959 transitions. [2021-11-23 17:28:52,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:28:52,643 INFO L276 IsEmpty]: Start isEmpty. Operand 14186 states and 17959 transitions. [2021-11-23 17:28:52,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-23 17:28:52,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:28:52,649 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:28:52,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-23 17:28:52,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:28:52,865 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:28:52,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:28:52,866 INFO L85 PathProgramCache]: Analyzing trace with hash -608669261, now seen corresponding path program 1 times [2021-11-23 17:28:52,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:28:52,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791649284] [2021-11-23 17:28:52,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:52,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:28:52,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:28:52,875 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:28:52,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:28:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:53,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:28:53,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:55,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:28:55,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:28:55,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791649284] [2021-11-23 17:28:55,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791649284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:28:55,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:28:55,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:28:55,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159048732] [2021-11-23 17:28:55,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:28:55,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:28:55,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:28:55,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:28:55,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:28:55,429 INFO L87 Difference]: Start difference. First operand 14186 states and 17959 transitions. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 2 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:30:19,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:30:19,012 INFO L93 Difference]: Finished difference Result 35208 states and 43489 transitions. [2021-11-23 17:30:19,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:30:19,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 2 states have internal predecessors, (238), 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 238 [2021-11-23 17:30:19,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:30:19,056 INFO L225 Difference]: With dead ends: 35208 [2021-11-23 17:30:19,057 INFO L226 Difference]: Without dead ends: 21024 [2021-11-23 17:30:19,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:30:19,072 INFO L933 BasicCegarLoop]: 1790 mSDtfsCounter, 1177 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 4526 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 1960 SdHoareTripleChecker+Invalid, 4757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 4526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:30:19,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 1960 Invalid, 4757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 4526 Invalid, 0 Unknown, 0 Unchecked, 83.3s Time] [2021-11-23 17:30:19,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21024 states. [2021-11-23 17:30:19,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21024 to 21018. [2021-11-23 17:30:19,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21018 states, 21017 states have (on average 1.1924156635104914) internal successors, (25061), 21017 states have internal predecessors, (25061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:30:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21018 states to 21018 states and 25061 transitions. [2021-11-23 17:30:19,434 INFO L78 Accepts]: Start accepts. Automaton has 21018 states and 25061 transitions. Word has length 238 [2021-11-23 17:30:19,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:30:19,435 INFO L470 AbstractCegarLoop]: Abstraction has 21018 states and 25061 transitions. [2021-11-23 17:30:19,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 2 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:30:19,436 INFO L276 IsEmpty]: Start isEmpty. Operand 21018 states and 25061 transitions. [2021-11-23 17:30:19,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-23 17:30:19,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:30:19,440 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:30:19,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-23 17:30:19,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:30:19,654 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:30:19,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:30:19,655 INFO L85 PathProgramCache]: Analyzing trace with hash -498444775, now seen corresponding path program 1 times [2021-11-23 17:30:19,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:30:19,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91563401] [2021-11-23 17:30:19,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:19,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:30:19,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:30:19,659 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:30:19,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:30:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:19,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:30:19,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:24,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:30:24,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:30:24,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91563401] [2021-11-23 17:30:24,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91563401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:30:24,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:30:24,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:30:24,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493536934] [2021-11-23 17:30:24,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:30:24,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:30:24,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:30:24,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:30:24,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:30:24,245 INFO L87 Difference]: Start difference. First operand 21018 states and 25061 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:35,798 INFO L93 Difference]: Finished difference Result 35227 states and 42827 transitions. [2021-11-23 17:31:35,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:31:35,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 3 states have internal predecessors, (266), 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 266 [2021-11-23 17:31:35,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:35,834 INFO L225 Difference]: With dead ends: 35227 [2021-11-23 17:31:35,835 INFO L226 Difference]: Without dead ends: 15545 [2021-11-23 17:31:35,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:31:35,852 INFO L933 BasicCegarLoop]: 1774 mSDtfsCounter, 1154 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5728 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 1953 SdHoareTripleChecker+Invalid, 5736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:35,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1154 Valid, 1953 Invalid, 5736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5728 Invalid, 0 Unknown, 0 Unchecked, 71.3s Time] [2021-11-23 17:31:35,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15545 states. [2021-11-23 17:31:36,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15545 to 15544. [2021-11-23 17:31:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15544 states, 15543 states have (on average 1.2284629736859036) internal successors, (19094), 15543 states have internal predecessors, (19094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15544 states to 15544 states and 19094 transitions. [2021-11-23 17:31:36,070 INFO L78 Accepts]: Start accepts. Automaton has 15544 states and 19094 transitions. Word has length 266 [2021-11-23 17:31:36,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:36,070 INFO L470 AbstractCegarLoop]: Abstraction has 15544 states and 19094 transitions. [2021-11-23 17:31:36,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 15544 states and 19094 transitions. [2021-11-23 17:31:36,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2021-11-23 17:31:36,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:36,087 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:36,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:36,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:36,299 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:36,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:36,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1924179157, now seen corresponding path program 1 times [2021-11-23 17:31:36,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:36,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478612276] [2021-11-23 17:31:36,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:36,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:36,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:36,304 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:36,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a878033-8ce3-4754-b3aa-1260324ed706/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:31:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:36,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:31:36,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 57 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:38,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:39,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:39,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478612276] [2021-11-23 17:31:39,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478612276] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:31:39,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:31:39,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:31:39,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100566800] [2021-11-23 17:31:39,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:39,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:31:39,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:39,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:31:39,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:31:39,716 INFO L87 Difference]: Start difference. First operand 15544 states and 19094 transitions. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:47,746 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:31:50,128 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:41,781 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:07,307 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:13,620 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:30,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []