./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label25.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_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/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_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label25.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/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_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/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 af25e83b6858fff60f7d1f210bf28c8f4df9d888273dfb197f604bfc8ae9e1a1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:22:03,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:22:03,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:22:03,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:22:03,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:22:03,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:22:03,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:22:03,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:22:03,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:22:03,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:22:03,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:22:03,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:22:03,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:22:03,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:22:03,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:22:03,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:22:03,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:22:03,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:22:03,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:22:03,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:22:03,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:22:03,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:22:03,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:22:03,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:22:03,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:22:03,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:22:03,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:22:03,513 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:22:03,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:22:03,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:22:03,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:22:03,519 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:22:03,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:22:03,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:22:03,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:22:03,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:22:03,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:22:03,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:22:03,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:22:03,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:22:03,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:22:03,531 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:22:03,573 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:22:03,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:22:03,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:22:03,575 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:22:03,583 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:22:03,583 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:22:03,584 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:22:03,584 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:22:03,584 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:22:03,585 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:22:03,586 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:22:03,586 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:22:03,587 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:22:03,587 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:22:03,587 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:22:03,588 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:22:03,588 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:22:03,588 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:22:03,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:22:03,589 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:22:03,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:22:03,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:22:03,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:22:03,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:22:03,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:22:03,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:22:03,593 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:22:03,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:22:03,594 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:22:03,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:22:03,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:22:03,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:22:03,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:22:03,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:22:03,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:22:03,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:22:03,596 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:22:03,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:22:03,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:22:03,597 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:22:03,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:22:03,598 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_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af25e83b6858fff60f7d1f210bf28c8f4df9d888273dfb197f604bfc8ae9e1a1 [2021-11-23 17:22:03,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:22:03,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:22:03,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:22:03,975 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:22:03,975 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:22:03,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem14_label25.c [2021-11-23 17:22:04,071 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/data/c18c3f163/9da48c1ae6764c2eadabefc7c08c3e89/FLAGbd9720cc0 [2021-11-23 17:22:04,786 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:22:04,804 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/sv-benchmarks/c/eca-rers2012/Problem14_label25.c [2021-11-23 17:22:04,840 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/data/c18c3f163/9da48c1ae6764c2eadabefc7c08c3e89/FLAGbd9720cc0 [2021-11-23 17:22:05,026 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/data/c18c3f163/9da48c1ae6764c2eadabefc7c08c3e89 [2021-11-23 17:22:05,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:22:05,031 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:22:05,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:22:05,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:22:05,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:22:05,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:22:05" (1/1) ... [2021-11-23 17:22:05,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e45d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:05, skipping insertion in model container [2021-11-23 17:22:05,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:22:05" (1/1) ... [2021-11-23 17:22:05,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:22:05,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:22:05,377 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_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/sv-benchmarks/c/eca-rers2012/Problem14_label25.c[6534,6547] [2021-11-23 17:22:05,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:22:05,652 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:22:05,701 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_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/sv-benchmarks/c/eca-rers2012/Problem14_label25.c[6534,6547] [2021-11-23 17:22:05,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:22:05,866 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:22:05,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:05 WrapperNode [2021-11-23 17:22:05,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:22:05,869 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:22:05,869 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:22:05,869 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:22:05,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:05" (1/1) ... [2021-11-23 17:22:05,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:05" (1/1) ... [2021-11-23 17:22:05,999 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 858 [2021-11-23 17:22:05,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:22:06,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:22:06,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:22:06,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:22:06,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:05" (1/1) ... [2021-11-23 17:22:06,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:05" (1/1) ... [2021-11-23 17:22:06,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:05" (1/1) ... [2021-11-23 17:22:06,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:05" (1/1) ... [2021-11-23 17:22:06,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:05" (1/1) ... [2021-11-23 17:22:06,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:05" (1/1) ... [2021-11-23 17:22:06,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:05" (1/1) ... [2021-11-23 17:22:06,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:22:06,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:22:06,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:22:06,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:22:06,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:05" (1/1) ... [2021-11-23 17:22:06,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:22:06,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:22:06,150 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:22:06,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:22:06,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:22:06,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:22:06,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:22:06,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:22:06,303 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:22:06,304 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:22:07,622 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:22:07,656 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 17:22:07,681 INFO L158 Benchmark]: Toolchain (without parser) took 2649.51ms. Allocated memory was 111.1MB in the beginning and 144.7MB in the end (delta: 33.6MB). Free memory was 70.0MB in the beginning and 101.3MB in the end (delta: -31.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. [2021-11-23 17:22:07,682 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 111.1MB. Free memory was 89.4MB in the beginning and 89.4MB in the end (delta: 33.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:22:07,683 INFO L158 Benchmark]: CACSL2BoogieTranslator took 835.21ms. Allocated memory is still 111.1MB. Free memory was 69.8MB in the beginning and 64.0MB in the end (delta: 5.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 17:22:07,684 INFO L158 Benchmark]: Boogie Procedure Inliner took 131.07ms. Allocated memory is still 111.1MB. Free memory was 64.0MB in the beginning and 54.4MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:22:07,684 INFO L158 Benchmark]: Boogie Preprocessor took 101.54ms. Allocated memory is still 111.1MB. Free memory was 54.4MB in the beginning and 48.4MB in the end (delta: 6.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 17:22:07,685 INFO L158 Benchmark]: RCFGBuilder took 1576.61ms. Allocated memory was 111.1MB in the beginning and 144.7MB in the end (delta: 33.6MB). Free memory was 48.4MB in the beginning and 101.3MB in the end (delta: -52.9MB). Peak memory consumption was 31.0MB. Max. memory is 16.1GB. [2021-11-23 17:22:07,694 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 111.1MB. Free memory was 89.4MB in the beginning and 89.4MB in the end (delta: 33.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 835.21ms. Allocated memory is still 111.1MB. Free memory was 69.8MB in the beginning and 64.0MB in the end (delta: 5.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 131.07ms. Allocated memory is still 111.1MB. Free memory was 64.0MB in the beginning and 54.4MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 101.54ms. Allocated memory is still 111.1MB. Free memory was 54.4MB in the beginning and 48.4MB in the end (delta: 6.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 1576.61ms. Allocated memory was 111.1MB in the beginning and 144.7MB in the end (delta: 33.6MB). Free memory was 48.4MB in the beginning and 101.3MB in the end (delta: -52.9MB). Peak memory consumption was 31.0MB. 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 17:22:07,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/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_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/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_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label25.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/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_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/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 af25e83b6858fff60f7d1f210bf28c8f4df9d888273dfb197f604bfc8ae9e1a1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:22:10,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:22:10,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:22:10,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:22:10,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:22:10,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:22:10,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:22:10,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:22:10,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:22:10,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:22:10,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:22:10,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:22:10,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:22:10,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:22:10,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:22:10,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:22:10,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:22:10,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:22:10,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:22:10,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:22:10,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:22:10,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:22:10,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:22:10,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:22:10,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:22:10,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:22:10,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:22:10,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:22:10,444 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:22:10,445 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:22:10,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:22:10,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:22:10,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:22:10,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:22:10,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:22:10,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:22:10,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:22:10,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:22:10,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:22:10,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:22:10,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:22:10,455 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:22:10,484 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:22:10,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:22:10,485 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:22:10,485 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:22:10,486 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:22:10,486 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:22:10,487 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:22:10,487 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:22:10,487 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:22:10,487 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:22:10,489 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:22:10,489 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:22:10,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:22:10,491 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:22:10,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:22:10,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:22:10,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:22:10,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:22:10,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:22:10,492 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:22:10,492 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:22:10,493 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:22:10,493 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:22:10,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:22:10,493 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:22:10,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:22:10,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:22:10,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:22:10,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:22:10,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:22:10,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:22:10,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:22:10,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:22:10,496 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:22:10,496 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:22:10,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:22:10,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:22:10,497 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:22:10,497 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_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af25e83b6858fff60f7d1f210bf28c8f4df9d888273dfb197f604bfc8ae9e1a1 [2021-11-23 17:22:10,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:22:10,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:22:10,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:22:10,939 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:22:10,939 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:22:10,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem14_label25.c [2021-11-23 17:22:11,011 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/data/06900dd31/fe201a388e0c40b5bc4230f089cd1bdf/FLAG998ada397 [2021-11-23 17:22:11,784 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:22:11,785 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/sv-benchmarks/c/eca-rers2012/Problem14_label25.c [2021-11-23 17:22:11,805 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/data/06900dd31/fe201a388e0c40b5bc4230f089cd1bdf/FLAG998ada397 [2021-11-23 17:22:11,953 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/data/06900dd31/fe201a388e0c40b5bc4230f089cd1bdf [2021-11-23 17:22:11,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:22:11,957 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:22:11,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:22:11,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:22:11,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:22:11,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:22:11" (1/1) ... [2021-11-23 17:22:11,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@322826a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:11, skipping insertion in model container [2021-11-23 17:22:11,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:22:11" (1/1) ... [2021-11-23 17:22:11,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:22:12,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:22:12,283 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_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/sv-benchmarks/c/eca-rers2012/Problem14_label25.c[6534,6547] [2021-11-23 17:22:12,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:22:12,539 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:22:12,577 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_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/sv-benchmarks/c/eca-rers2012/Problem14_label25.c[6534,6547] [2021-11-23 17:22:12,771 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:22:12,807 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:22:12,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:12 WrapperNode [2021-11-23 17:22:12,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:22:12,809 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:22:12,809 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:22:12,809 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:22:12,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:12" (1/1) ... [2021-11-23 17:22:12,858 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:12" (1/1) ... [2021-11-23 17:22:12,926 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 856 [2021-11-23 17:22:12,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:22:12,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:22:12,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:22:12,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:22:12,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:12" (1/1) ... [2021-11-23 17:22:12,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:12" (1/1) ... [2021-11-23 17:22:12,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:12" (1/1) ... [2021-11-23 17:22:12,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:12" (1/1) ... [2021-11-23 17:22:12,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:12" (1/1) ... [2021-11-23 17:22:12,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:12" (1/1) ... [2021-11-23 17:22:12,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:12" (1/1) ... [2021-11-23 17:22:13,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:22:13,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:22:13,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:22:13,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:22:13,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:12" (1/1) ... [2021-11-23 17:22:13,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:22:13,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:22:13,043 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:22:13,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:22:13,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:22:13,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:22:13,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:22:13,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:22:13,207 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:22:13,209 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:22:16,656 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:22:16,667 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:22:16,668 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:22:16,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:22:16 BoogieIcfgContainer [2021-11-23 17:22:16,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:22:16,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:22:16,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:22:16,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:22:16,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:22:11" (1/3) ... [2021-11-23 17:22:16,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a08d6a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:22:16, skipping insertion in model container [2021-11-23 17:22:16,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:22:12" (2/3) ... [2021-11-23 17:22:16,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a08d6a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:22:16, skipping insertion in model container [2021-11-23 17:22:16,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:22:16" (3/3) ... [2021-11-23 17:22:16,679 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label25.c [2021-11-23 17:22:16,685 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:22:16,685 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:22:16,738 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:22:16,745 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 17:22:16,745 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:22:16,778 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:16,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 17:22:16,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:16,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:22:16,789 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:22:16,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:16,798 INFO L85 PathProgramCache]: Analyzing trace with hash -107486446, now seen corresponding path program 1 times [2021-11-23 17:22:16,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:16,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726839438] [2021-11-23 17:22:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:16,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:16,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:16,820 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:16,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:22:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:16,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:22:16,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:17,349 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 17:22:17,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:17,350 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:17,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726839438] [2021-11-23 17:22:17,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726839438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:17,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:17,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:22:17,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801902757] [2021-11-23 17:22:17,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:17,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:22:17,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:17,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:22:17,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:22:17,411 INFO L87 Difference]: Start difference. First operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 17:22:21,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:21,198 INFO L93 Difference]: Finished difference Result 685 states and 1216 transitions. [2021-11-23 17:22:21,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:22:21,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 64 [2021-11-23 17:22:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:21,217 INFO L225 Difference]: With dead ends: 685 [2021-11-23 17:22:21,218 INFO L226 Difference]: Without dead ends: 360 [2021-11-23 17:22:21,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 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 17:22:21,227 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:21,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 139 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-23 17:22:21,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-23 17:22:21,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-11-23 17:22:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.4206128133704736) internal successors, (510), 359 states have internal predecessors, (510), 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 17:22:21,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 510 transitions. [2021-11-23 17:22:21,325 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 510 transitions. Word has length 64 [2021-11-23 17:22:21,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:21,326 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 510 transitions. [2021-11-23 17:22:21,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 17:22:21,327 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 510 transitions. [2021-11-23 17:22:21,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 17:22:21,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:21,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:22:21,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 17:22:21,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:21,535 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:22:21,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:21,536 INFO L85 PathProgramCache]: Analyzing trace with hash -2022372162, now seen corresponding path program 1 times [2021-11-23 17:22:21,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:21,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974625478] [2021-11-23 17:22:21,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:21,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:21,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:21,541 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:21,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:22:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:21,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:22:21,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:22,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:22,150 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:22,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974625478] [2021-11-23 17:22:22,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974625478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:22,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:22,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:22:22,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443225737] [2021-11-23 17:22:22,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:22,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:22:22,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:22,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:22:22,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:22:22,155 INFO L87 Difference]: Start difference. First operand 360 states and 510 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 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 17:22:26,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:26,431 INFO L93 Difference]: Finished difference Result 1074 states and 1525 transitions. [2021-11-23 17:22:26,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:22:26,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 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 133 [2021-11-23 17:22:26,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:26,439 INFO L225 Difference]: With dead ends: 1074 [2021-11-23 17:22:26,440 INFO L226 Difference]: Without dead ends: 716 [2021-11-23 17:22:26,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 17:22:26,444 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 112 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:26,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 107 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 17:22:26,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-11-23 17:22:26,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2021-11-23 17:22:26,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.304895104895105) internal successors, (933), 715 states have internal predecessors, (933), 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 17:22:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 933 transitions. [2021-11-23 17:22:26,488 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 933 transitions. Word has length 133 [2021-11-23 17:22:26,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:26,489 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 933 transitions. [2021-11-23 17:22:26,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 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 17:22:26,490 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 933 transitions. [2021-11-23 17:22:26,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-23 17:22:26,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:26,494 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:22:26,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 17:22:26,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:26,707 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:22:26,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:26,707 INFO L85 PathProgramCache]: Analyzing trace with hash -407309043, now seen corresponding path program 1 times [2021-11-23 17:22:26,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:26,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392068202] [2021-11-23 17:22:26,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:26,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:26,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:26,722 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:26,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:22:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:26,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:22:26,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:27,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:27,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:27,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392068202] [2021-11-23 17:22:27,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392068202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:27,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:27,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:22:27,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458432134] [2021-11-23 17:22:27,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:27,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:22:27,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:27,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:22:27,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:22:27,698 INFO L87 Difference]: Start difference. First operand 716 states and 933 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 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 17:22:30,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:30,274 INFO L93 Difference]: Finished difference Result 1074 states and 1454 transitions. [2021-11-23 17:22:30,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:22:30,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 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 138 [2021-11-23 17:22:30,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:30,279 INFO L225 Difference]: With dead ends: 1074 [2021-11-23 17:22:30,280 INFO L226 Difference]: Without dead ends: 716 [2021-11-23 17:22:30,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 136 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 17:22:30,282 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 106 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:30,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 114 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 17:22:30,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-11-23 17:22:30,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2021-11-23 17:22:30,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.2965034965034965) internal successors, (927), 715 states have internal predecessors, (927), 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 17:22:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 927 transitions. [2021-11-23 17:22:30,308 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 927 transitions. Word has length 138 [2021-11-23 17:22:30,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:30,309 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 927 transitions. [2021-11-23 17:22:30,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 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 17:22:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 927 transitions. [2021-11-23 17:22:30,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-23 17:22:30,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:30,314 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:22:30,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 17:22:30,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:30,525 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:22:30,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:30,526 INFO L85 PathProgramCache]: Analyzing trace with hash -223405425, now seen corresponding path program 1 times [2021-11-23 17:22:30,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:30,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668027730] [2021-11-23 17:22:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:30,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:30,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:30,529 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:30,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:22:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:30,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:22:30,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-23 17:22:31,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:31,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:31,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668027730] [2021-11-23 17:22:31,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668027730] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:31,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:31,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:22:31,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422877854] [2021-11-23 17:22:31,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:31,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:22:31,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:31,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:22:31,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:22:31,135 INFO L87 Difference]: Start difference. First operand 716 states and 927 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 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 17:22:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:35,319 INFO L93 Difference]: Finished difference Result 1786 states and 2396 transitions. [2021-11-23 17:22:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:22:35,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 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 199 [2021-11-23 17:22:35,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:35,327 INFO L225 Difference]: With dead ends: 1786 [2021-11-23 17:22:35,328 INFO L226 Difference]: Without dead ends: 1250 [2021-11-23 17:22:35,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 197 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 17:22:35,331 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 115 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:35,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 120 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-23 17:22:35,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-23 17:22:35,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1250. [2021-11-23 17:22:35,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 1.2465972778222578) internal successors, (1557), 1249 states have internal predecessors, (1557), 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 17:22:35,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1557 transitions. [2021-11-23 17:22:35,370 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1557 transitions. Word has length 199 [2021-11-23 17:22:35,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:35,371 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1557 transitions. [2021-11-23 17:22:35,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 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 17:22:35,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1557 transitions. [2021-11-23 17:22:35,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-23 17:22:35,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:35,375 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:22:35,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:35,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:35,589 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:22:35,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:35,590 INFO L85 PathProgramCache]: Analyzing trace with hash 2012315506, now seen corresponding path program 1 times [2021-11-23 17:22:35,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:35,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126440269] [2021-11-23 17:22:35,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:35,591 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:35,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:35,596 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:35,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:22:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:35,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:22:35,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 17:22:37,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:37,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:37,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126440269] [2021-11-23 17:22:37,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126440269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:37,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:37,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:22:37,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327036843] [2021-11-23 17:22:37,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:37,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:22:37,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:37,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:22:37,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:22:37,255 INFO L87 Difference]: Start difference. First operand 1250 states and 1557 transitions. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 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 17:22:40,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:40,536 INFO L93 Difference]: Finished difference Result 2171 states and 2743 transitions. [2021-11-23 17:22:40,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:22:40,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 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 213 [2021-11-23 17:22:40,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:40,547 INFO L225 Difference]: With dead ends: 2171 [2021-11-23 17:22:40,547 INFO L226 Difference]: Without dead ends: 1072 [2021-11-23 17:22:40,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 210 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 17:22:40,550 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 103 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:40,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 114 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-23 17:22:40,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-11-23 17:22:40,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2021-11-23 17:22:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.2399626517273576) internal successors, (1328), 1071 states have internal predecessors, (1328), 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 17:22:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1328 transitions. [2021-11-23 17:22:40,584 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1328 transitions. Word has length 213 [2021-11-23 17:22:40,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:40,584 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1328 transitions. [2021-11-23 17:22:40,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 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 17:22:40,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1328 transitions. [2021-11-23 17:22:40,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-23 17:22:40,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:40,589 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:22:40,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:40,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:40,802 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:22:40,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:40,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1496527885, now seen corresponding path program 1 times [2021-11-23 17:22:40,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:40,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961645902] [2021-11-23 17:22:40,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:40,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:40,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:40,808 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:40,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:22:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:40,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:22:40,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-23 17:22:42,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:42,427 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:42,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961645902] [2021-11-23 17:22:42,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961645902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:42,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:42,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:22:42,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894291013] [2021-11-23 17:22:42,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:42,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:22:42,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:42,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:22:42,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:22:42,429 INFO L87 Difference]: Start difference. First operand 1072 states and 1328 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 17:22:45,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:45,039 INFO L93 Difference]: Finished difference Result 1786 states and 2289 transitions. [2021-11-23 17:22:45,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:22:45,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 239 [2021-11-23 17:22:45,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:45,047 INFO L225 Difference]: With dead ends: 1786 [2021-11-23 17:22:45,047 INFO L226 Difference]: Without dead ends: 1072 [2021-11-23 17:22:45,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 237 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 17:22:45,050 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 73 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:45,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 123 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 17:22:45,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-11-23 17:22:45,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2021-11-23 17:22:45,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.2343604108309991) internal successors, (1322), 1071 states have internal predecessors, (1322), 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 17:22:45,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1322 transitions. [2021-11-23 17:22:45,087 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1322 transitions. Word has length 239 [2021-11-23 17:22:45,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:45,088 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1322 transitions. [2021-11-23 17:22:45,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 17:22:45,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1322 transitions. [2021-11-23 17:22:45,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2021-11-23 17:22:45,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:45,096 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:22:45,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:45,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:45,317 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:22:45,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:45,318 INFO L85 PathProgramCache]: Analyzing trace with hash -935449149, now seen corresponding path program 1 times [2021-11-23 17:22:45,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:45,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856847798] [2021-11-23 17:22:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:45,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:45,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:45,322 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:45,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:22:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:45,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:22:45,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 185 proven. 135 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:22:46,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 320 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:22:48,344 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:48,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856847798] [2021-11-23 17:22:48,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856847798] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:22:48,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:22:48,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:22:48,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085362329] [2021-11-23 17:22:48,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:48,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:22:48,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:48,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:22:48,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:22:48,347 INFO L87 Difference]: Start difference. First operand 1072 states and 1322 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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 17:22:56,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:56,780 INFO L93 Difference]: Finished difference Result 2142 states and 2814 transitions. [2021-11-23 17:22:56,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:22:56,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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 343 [2021-11-23 17:22:56,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:56,791 INFO L225 Difference]: With dead ends: 2142 [2021-11-23 17:22:56,791 INFO L226 Difference]: Without dead ends: 1428 [2021-11-23 17:22:56,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 681 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:22:56,793 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 135 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:56,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 57 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2021-11-23 17:22:56,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-11-23 17:22:56,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1428. [2021-11-23 17:22:56,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 1.2396636299929924) internal successors, (1769), 1427 states have internal predecessors, (1769), 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 17:22:56,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 1769 transitions. [2021-11-23 17:22:56,835 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 1769 transitions. Word has length 343 [2021-11-23 17:22:56,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:56,836 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 1769 transitions. [2021-11-23 17:22:56,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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 17:22:56,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 1769 transitions. [2021-11-23 17:22:56,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-11-23 17:22:56,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:56,844 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2021-11-23 17:22:56,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-23 17:22:57,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:57,059 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:22:57,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:57,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2128270565, now seen corresponding path program 1 times [2021-11-23 17:22:57,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:57,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987215973] [2021-11-23 17:22:57,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:57,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:57,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:57,065 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:57,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:22:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:57,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:22:57,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 185 proven. 159 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:22:58,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:22:59,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:59,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987215973] [2021-11-23 17:22:59,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987215973] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:22:59,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:22:59,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:22:59,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300890014] [2021-11-23 17:22:59,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:59,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:22:59,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:59,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:22:59,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:22:59,790 INFO L87 Difference]: Start difference. First operand 1428 states and 1769 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:08,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:08,248 INFO L93 Difference]: Finished difference Result 3210 states and 4156 transitions. [2021-11-23 17:23:08,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:23:08,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 355 [2021-11-23 17:23:08,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:08,264 INFO L225 Difference]: With dead ends: 3210 [2021-11-23 17:23:08,264 INFO L226 Difference]: Without dead ends: 2140 [2021-11-23 17:23:08,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 705 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:23:08,268 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 112 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:08,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 249 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2021-11-23 17:23:08,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-11-23 17:23:08,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2140. [2021-11-23 17:23:08,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 1.2482468443197756) internal successors, (2670), 2139 states have internal predecessors, (2670), 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 17:23:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 2670 transitions. [2021-11-23 17:23:08,332 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 2670 transitions. Word has length 355 [2021-11-23 17:23:08,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:08,333 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 2670 transitions. [2021-11-23 17:23:08,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:08,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 2670 transitions. [2021-11-23 17:23:08,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-11-23 17:23:08,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:08,342 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:23:08,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-23 17:23:08,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:08,557 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:23:08,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:08,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1610591299, now seen corresponding path program 1 times [2021-11-23 17:23:08,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:08,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716504961] [2021-11-23 17:23:08,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:08,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:08,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:08,562 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:08,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:23:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:08,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:23:08,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 99 proven. 277 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:23:11,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:23:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 347 proven. 29 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:23:19,861 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:19,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716504961] [2021-11-23 17:23:19,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716504961] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:23:19,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1794689902] [2021-11-23 17:23:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:19,871 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:23:19,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:23:19,872 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:23:19,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 17:23:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:20,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:23:20,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:21,636 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-11-23 17:23:21,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:21,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1794689902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:21,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:23:21,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4] total 13 [2021-11-23 17:23:21,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181565891] [2021-11-23 17:23:21,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:21,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:23:21,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:21,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:23:21,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-23 17:23:21,639 INFO L87 Difference]: Start difference. First operand 2140 states and 2670 transitions. Second operand has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:26,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:26,741 INFO L93 Difference]: Finished difference Result 4630 states and 5966 transitions. [2021-11-23 17:23:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:23:26,742 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 371 [2021-11-23 17:23:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:26,758 INFO L225 Difference]: With dead ends: 4630 [2021-11-23 17:23:26,758 INFO L226 Difference]: Without dead ends: 2848 [2021-11-23 17:23:26,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1100 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:23:26,762 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 537 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:26,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 318 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-23 17:23:26,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2021-11-23 17:23:26,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 2318. [2021-11-23 17:23:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2317 states have (on average 1.2317652136383255) internal successors, (2854), 2317 states have internal predecessors, (2854), 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 17:23:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 2854 transitions. [2021-11-23 17:23:26,835 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 2854 transitions. Word has length 371 [2021-11-23 17:23:26,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:26,836 INFO L470 AbstractCegarLoop]: Abstraction has 2318 states and 2854 transitions. [2021-11-23 17:23:26,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:26,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 2854 transitions. [2021-11-23 17:23:26,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2021-11-23 17:23:26,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:26,841 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:23:26,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:27,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:27,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:23:27,255 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:23:27,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:27,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1772527898, now seen corresponding path program 1 times [2021-11-23 17:23:27,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:27,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412977011] [2021-11-23 17:23:27,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:27,259 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:27,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:27,260 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:27,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:23:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:27,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:23:27,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 364 proven. 277 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-23 17:23:29,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:23:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 612 proven. 29 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-23 17:23:37,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:37,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412977011] [2021-11-23 17:23:37,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412977011] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:23:37,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1609333710] [2021-11-23 17:23:37,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:37,232 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:23:37,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:23:37,239 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:23:37,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:23:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:37,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:23:37,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 471 proven. 0 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-23 17:23:39,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:39,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1609333710] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:39,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:23:39,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4] total 11 [2021-11-23 17:23:39,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323790648] [2021-11-23 17:23:39,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:39,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:23:39,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:39,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:23:39,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:23:39,083 INFO L87 Difference]: Start difference. First operand 2318 states and 2854 transitions. Second operand has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 6 states have internal predecessors, (241), 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 17:23:42,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:42,896 INFO L93 Difference]: Finished difference Result 4352 states and 5421 transitions. [2021-11-23 17:23:42,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:23:42,897 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 6 states have internal predecessors, (241), 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 450 [2021-11-23 17:23:42,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:42,917 INFO L225 Difference]: With dead ends: 4352 [2021-11-23 17:23:42,917 INFO L226 Difference]: Without dead ends: 2318 [2021-11-23 17:23:42,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1347 GetRequests, 1338 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:23:42,922 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 57 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:42,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 318 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-23 17:23:42,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-11-23 17:23:42,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2318. [2021-11-23 17:23:42,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2317 states have (on average 1.0884764782045748) internal successors, (2522), 2317 states have internal predecessors, (2522), 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 17:23:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 2522 transitions. [2021-11-23 17:23:42,992 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 2522 transitions. Word has length 450 [2021-11-23 17:23:42,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:42,993 INFO L470 AbstractCegarLoop]: Abstraction has 2318 states and 2522 transitions. [2021-11-23 17:23:42,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 6 states have internal predecessors, (241), 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 17:23:42,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 2522 transitions. [2021-11-23 17:23:43,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2021-11-23 17:23:43,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:43,001 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:43,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:43,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-23 17:23:43,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:23:43,418 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:23:43,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:43,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1485999990, now seen corresponding path program 1 times [2021-11-23 17:23:43,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:43,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402431496] [2021-11-23 17:23:43,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:43,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:43,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:43,422 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:43,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:23:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:43,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:23:43,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1398 backedges. 129 proven. 1103 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-23 17:23:46,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:23:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1398 backedges. 882 proven. 350 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-23 17:23:50,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:50,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402431496] [2021-11-23 17:23:50,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402431496] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:23:50,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1039089075] [2021-11-23 17:23:50,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:50,766 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:23:50,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:23:50,788 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:23:50,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 17:23:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:51,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:23:51,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1398 backedges. 883 proven. 139 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-23 17:23:53,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:23:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1398 backedges. 883 proven. 139 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-23 17:23:55,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1039089075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:23:55,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887556180] [2021-11-23 17:23:55,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:55,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:23:55,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:23:55,814 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:23:55,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 17:23:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:56,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:23:56,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1398 backedges. 929 proven. 93 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-23 17:23:59,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1398 backedges. 929 proven. 93 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-23 17:24:03,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887556180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:24:03,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:24:03,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5, 5, 4, 4] total 12 [2021-11-23 17:24:03,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199236777] [2021-11-23 17:24:03,953 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:24:03,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 17:24:03,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:03,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 17:24:03,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:24:03,959 INFO L87 Difference]: Start difference. First operand 2318 states and 2522 transitions. Second operand has 12 states, 12 states have (on average 104.83333333333333) internal successors, (1258), 12 states have internal predecessors, (1258), 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 17:24:12,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:12,490 INFO L93 Difference]: Finished difference Result 5017 states and 5438 transitions. [2021-11-23 17:24:12,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 17:24:12,491 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 104.83333333333333) internal successors, (1258), 12 states have internal predecessors, (1258), 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 692 [2021-11-23 17:24:12,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:12,506 INFO L225 Difference]: With dead ends: 5017 [2021-11-23 17:24:12,507 INFO L226 Difference]: Without dead ends: 3057 [2021-11-23 17:24:12,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4161 GetRequests, 4142 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-11-23 17:24:12,510 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 1055 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 4846 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1055 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 4920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 4846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:12,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1055 Valid, 135 Invalid, 4920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 4846 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2021-11-23 17:24:12,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3057 states. [2021-11-23 17:24:12,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3057 to 2496. [2021-11-23 17:24:12,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2495 states have (on average 1.082565130260521) internal successors, (2701), 2495 states have internal predecessors, (2701), 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 17:24:12,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 2701 transitions. [2021-11-23 17:24:12,587 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 2701 transitions. Word has length 692 [2021-11-23 17:24:12,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:12,589 INFO L470 AbstractCegarLoop]: Abstraction has 2496 states and 2701 transitions. [2021-11-23 17:24:12,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 104.83333333333333) internal successors, (1258), 12 states have internal predecessors, (1258), 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 17:24:12,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 2701 transitions. [2021-11-23 17:24:12,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 719 [2021-11-23 17:24:12,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:12,597 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:24:12,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:12,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:13,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:13,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:24:13,216 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:13,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:13,216 INFO L85 PathProgramCache]: Analyzing trace with hash -720584041, now seen corresponding path program 1 times [2021-11-23 17:24:13,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:13,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475809208] [2021-11-23 17:24:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:13,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:13,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:13,221 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:13,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:24:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:13,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:24:13,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 309 proven. 898 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-23 17:24:21,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 939 proven. 268 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-23 17:24:49,167 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:49,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475809208] [2021-11-23 17:24:49,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475809208] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:24:49,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1454237242] [2021-11-23 17:24:49,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:49,167 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:24:49,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:24:49,168 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:24:49,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 17:24:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:49,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:24:49,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 309 proven. 0 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-11-23 17:24:50,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:50,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1454237242] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:50,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:24:50,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10, 10] total 20 [2021-11-23 17:24:50,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298785539] [2021-11-23 17:24:50,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:50,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:24:50,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:50,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:24:50,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:24:50,478 INFO L87 Difference]: Start difference. First operand 2496 states and 2701 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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 17:24:52,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:52,829 INFO L93 Difference]: Finished difference Result 5346 states and 5878 transitions. [2021-11-23 17:24:52,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:24:52,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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 718 [2021-11-23 17:24:52,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:52,856 INFO L225 Difference]: With dead ends: 5346 [2021-11-23 17:24:52,856 INFO L226 Difference]: Without dead ends: 3208 [2021-11-23 17:24:52,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2151 GetRequests, 2133 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:24:52,860 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 117 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:52,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 223 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 17:24:52,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3208 states. [2021-11-23 17:24:52,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3208 to 3208. [2021-11-23 17:24:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 1.0763953850951045) internal successors, (3452), 3207 states have internal predecessors, (3452), 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 17:24:52,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 3452 transitions. [2021-11-23 17:24:52,935 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 3452 transitions. Word has length 718 [2021-11-23 17:24:52,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:52,937 INFO L470 AbstractCegarLoop]: Abstraction has 3208 states and 3452 transitions. [2021-11-23 17:24:52,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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 17:24:52,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 3452 transitions. [2021-11-23 17:24:52,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2021-11-23 17:24:52,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:52,948 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:24:52,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:53,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:53,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:24:53,363 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:53,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:53,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1809837962, now seen corresponding path program 1 times [2021-11-23 17:24:53,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:53,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447680783] [2021-11-23 17:24:53,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:53,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:53,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:53,368 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:53,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:24:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:53,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:24:53,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 683 proven. 898 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-23 17:25:01,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 1313 proven. 268 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-23 17:25:30,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:30,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447680783] [2021-11-23 17:25:30,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447680783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:30,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [486207319] [2021-11-23 17:25:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:30,385 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:30,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:30,387 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:30,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 17:25:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:30,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:25:30,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 699 proven. 46 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-11-23 17:25:32,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 699 proven. 46 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-11-23 17:25:33,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [486207319] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:33,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097850146] [2021-11-23 17:25:33,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:33,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:33,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:33,457 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:25:33,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 17:25:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:33,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:25:33,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 245 proven. 500 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-11-23 17:25:36,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 245 proven. 500 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-11-23 17:25:38,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097850146] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:38,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:25:38,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 5, 5, 5, 5] total 26 [2021-11-23 17:25:38,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923008914] [2021-11-23 17:25:38,612 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:25:38,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 17:25:38,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:38,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 17:25:38,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-11-23 17:25:38,617 INFO L87 Difference]: Start difference. First operand 3208 states and 3452 transitions. Second operand has 26 states, 26 states have (on average 56.88461538461539) internal successors, (1479), 26 states have internal predecessors, (1479), 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 17:25:48,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:48,676 INFO L93 Difference]: Finished difference Result 7820 states and 8495 transitions. [2021-11-23 17:25:48,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 17:25:48,677 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 56.88461538461539) internal successors, (1479), 26 states have internal predecessors, (1479), 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 793 [2021-11-23 17:25:48,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:48,694 INFO L225 Difference]: With dead ends: 7820 [2021-11-23 17:25:48,694 INFO L226 Difference]: Without dead ends: 4970 [2021-11-23 17:25:48,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4768 GetRequests, 4733 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=454, Invalid=878, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 17:25:48,697 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3228 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 5993 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3228 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 6366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 5993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:48,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3228 Valid, 95 Invalid, 6366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 5993 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2021-11-23 17:25:48,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4970 states. [2021-11-23 17:25:48,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4970 to 3911. [2021-11-23 17:25:48,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3911 states, 3910 states have (on average 1.0907928388746804) internal successors, (4265), 3910 states have internal predecessors, (4265), 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 17:25:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3911 states to 3911 states and 4265 transitions. [2021-11-23 17:25:48,783 INFO L78 Accepts]: Start accepts. Automaton has 3911 states and 4265 transitions. Word has length 793 [2021-11-23 17:25:48,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:48,784 INFO L470 AbstractCegarLoop]: Abstraction has 3911 states and 4265 transitions. [2021-11-23 17:25:48,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.88461538461539) internal successors, (1479), 26 states have internal predecessors, (1479), 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 17:25:48,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3911 states and 4265 transitions. [2021-11-23 17:25:48,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 902 [2021-11-23 17:25:48,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:48,796 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:48,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:49,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:49,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:49,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:49,410 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:49,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:49,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1501526746, now seen corresponding path program 1 times [2021-11-23 17:25:49,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:49,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2104160910] [2021-11-23 17:25:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:49,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:49,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:49,448 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:49,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:25:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:49,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:25:49,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 623 proven. 1662 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-23 17:25:59,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:45,805 WARN L860 $PredicateComparison]: unable to prove that (bvslt (_ bv11 32) (bvadd (_ bv42 32) (bvsrem (bvadd (_ bv464909 32) (bvsdiv (bvsdiv (bvadd (_ bv4294967295 32) (bvsrem c_~a12~0 (_ bv26 32))) (_ bv5 32)) (_ bv5 32))) (_ bv34 32)))) is different from true [2021-11-23 17:28:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 1676 proven. 486 refuted. 0 times theorem prover too weak. 139 trivial. 165 not checked. [2021-11-23 17:28:16,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:28:16,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2104160910] [2021-11-23 17:28:16,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2104160910] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:28:16,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [197912046] [2021-11-23 17:28:16,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:16,084 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:28:16,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:28:16,085 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:28:16,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-23 17:28:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:16,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:28:16,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 433 proven. 0 refuted. 0 times theorem prover too weak. 2033 trivial. 0 not checked. [2021-11-23 17:28:18,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:28:18,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [197912046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:28:18,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:28:18,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 13] total 28 [2021-11-23 17:28:18,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433966270] [2021-11-23 17:28:18,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:28:18,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:28:18,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:28:18,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:28:18,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=504, Unknown=1, NotChecked=50, Total=756 [2021-11-23 17:28:18,972 INFO L87 Difference]: Start difference. First operand 3911 states and 4265 transitions. Second operand has 7 states, 7 states have (on average 35.142857142857146) internal successors, (246), 7 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:28:22,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:28:22,916 INFO L93 Difference]: Finished difference Result 8691 states and 9554 transitions. [2021-11-23 17:28:22,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:28:22,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 35.142857142857146) internal successors, (246), 7 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 901 [2021-11-23 17:28:22,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:28:22,942 INFO L225 Difference]: With dead ends: 8691 [2021-11-23 17:28:22,942 INFO L226 Difference]: Without dead ends: 5138 [2021-11-23 17:28:22,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2702 GetRequests, 2675 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=217, Invalid=542, Unknown=1, NotChecked=52, Total=812 [2021-11-23 17:28:22,946 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 596 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:28:22,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 39 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-23 17:28:22,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5138 states. [2021-11-23 17:28:23,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5138 to 4623. [2021-11-23 17:28:23,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4623 states, 4622 states have (on average 1.0798355690177412) internal successors, (4991), 4622 states have internal predecessors, (4991), 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 17:28:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4623 states to 4623 states and 4991 transitions. [2021-11-23 17:28:23,025 INFO L78 Accepts]: Start accepts. Automaton has 4623 states and 4991 transitions. Word has length 901 [2021-11-23 17:28:23,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:28:23,026 INFO L470 AbstractCegarLoop]: Abstraction has 4623 states and 4991 transitions. [2021-11-23 17:28:23,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 35.142857142857146) internal successors, (246), 7 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:28:23,027 INFO L276 IsEmpty]: Start isEmpty. Operand 4623 states and 4991 transitions. [2021-11-23 17:28:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 959 [2021-11-23 17:28:23,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:28:23,040 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:28:23,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-23 17:28:23,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:28:23,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:28:23,443 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:28:23,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:28:23,443 INFO L85 PathProgramCache]: Analyzing trace with hash 664584664, now seen corresponding path program 1 times [2021-11-23 17:28:23,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:28:23,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605028680] [2021-11-23 17:28:23,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:23,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:28:23,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:28:23,448 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:28:23,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 17:28:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:23,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:28:23,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2950 backedges. 685 proven. 2014 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-11-23 17:28:33,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:25,845 WARN L860 $PredicateComparison]: unable to prove that (bvslt (_ bv11 32) (bvadd (_ bv42 32) (bvsrem (bvadd (_ bv464909 32) (bvsdiv (bvsdiv (bvadd (_ bv4294967295 32) (bvsrem c_~a12~0 (_ bv26 32))) (_ bv5 32)) (_ bv5 32))) (_ bv34 32)))) is different from true [2021-11-23 17:29:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2950 backedges. 1940 proven. 733 refuted. 0 times theorem prover too weak. 238 trivial. 39 not checked. [2021-11-23 17:29:53,622 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:29:53,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605028680] [2021-11-23 17:29:53,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605028680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:53,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2007049797] [2021-11-23 17:29:53,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:53,623 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:29:53,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:29:53,624 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:29:53,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-23 17:29:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:53,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:29:54,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2950 backedges. 495 proven. 0 refuted. 0 times theorem prover too weak. 2455 trivial. 0 not checked. [2021-11-23 17:29:55,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:29:55,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2007049797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:29:55,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:29:55,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 13] total 28 [2021-11-23 17:29:55,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426342016] [2021-11-23 17:29:55,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:29:55,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:29:55,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:29:55,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:29:55,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=540, Unknown=1, NotChecked=50, Total=756 [2021-11-23 17:29:55,973 INFO L87 Difference]: Start difference. First operand 4623 states and 4991 transitions. Second operand has 7 states, 7 states have (on average 35.285714285714285) internal successors, (247), 7 states have internal predecessors, (247), 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 17:30:00,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:30:00,171 INFO L93 Difference]: Finished difference Result 10030 states and 10894 transitions. [2021-11-23 17:30:00,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:30:00,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 35.285714285714285) internal successors, (247), 7 states have internal predecessors, (247), 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 958 [2021-11-23 17:30:00,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:30:00,188 INFO L225 Difference]: With dead ends: 10030 [2021-11-23 17:30:00,188 INFO L226 Difference]: Without dead ends: 5765 [2021-11-23 17:30:00,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2873 GetRequests, 2846 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=172, Invalid=587, Unknown=1, NotChecked=52, Total=812 [2021-11-23 17:30:00,193 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 594 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:30:00,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 44 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-23 17:30:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5765 states. [2021-11-23 17:30:00,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5765 to 4979. [2021-11-23 17:30:00,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4979 states, 4978 states have (on average 1.0721173161912414) internal successors, (5337), 4978 states have internal predecessors, (5337), 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 17:30:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4979 states to 4979 states and 5337 transitions. [2021-11-23 17:30:00,267 INFO L78 Accepts]: Start accepts. Automaton has 4979 states and 5337 transitions. Word has length 958 [2021-11-23 17:30:00,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:30:00,268 INFO L470 AbstractCegarLoop]: Abstraction has 4979 states and 5337 transitions. [2021-11-23 17:30:00,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 35.285714285714285) internal successors, (247), 7 states have internal predecessors, (247), 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 17:30:00,268 INFO L276 IsEmpty]: Start isEmpty. Operand 4979 states and 5337 transitions. [2021-11-23 17:30:00,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 975 [2021-11-23 17:30:00,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:30:00,283 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:30:00,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:00,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:00,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:30:00,698 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:30:00,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:30:00,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1259634046, now seen corresponding path program 1 times [2021-11-23 17:30:00,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:30:00,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933016704] [2021-11-23 17:30:00,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:00,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:30:00,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:30:00,703 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:30:00,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 17:30:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:01,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:30:01,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3048 backedges. 1173 proven. 1632 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-11-23 17:30:10,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:00,588 WARN L860 $PredicateComparison]: unable to prove that (bvslt (_ bv11 32) (bvadd (_ bv42 32) (bvsrem (bvadd (_ bv464909 32) (bvsdiv (bvsdiv (bvadd (_ bv4294967295 32) (bvsrem c_~a12~0 (_ bv26 32))) (_ bv5 32)) (_ bv5 32))) (_ bv34 32)))) is different from true [2021-11-23 17:32:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3048 backedges. 2174 proven. 474 refuted. 0 times theorem prover too weak. 191 trivial. 209 not checked. [2021-11-23 17:32:53,489 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:53,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933016704] [2021-11-23 17:32:53,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933016704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:53,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1914786810] [2021-11-23 17:32:53,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:53,508 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:53,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:32:53,509 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:32:53,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-23 17:32:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:53,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:32:53,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3048 backedges. 1030 proven. 0 refuted. 0 times theorem prover too weak. 2018 trivial. 0 not checked. [2021-11-23 17:32:56,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:32:56,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1914786810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:32:56,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:32:56,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12, 13] total 27 [2021-11-23 17:32:56,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743007535] [2021-11-23 17:32:56,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:32:56,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:32:56,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:56,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:32:56,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=505, Unknown=1, NotChecked=48, Total=702 [2021-11-23 17:32:56,019 INFO L87 Difference]: Start difference. First operand 4979 states and 5337 transitions. Second operand has 6 states, 6 states have (on average 51.833333333333336) internal successors, (311), 6 states have internal predecessors, (311), 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 17:32:58,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:58,333 INFO L93 Difference]: Finished difference Result 9516 states and 10180 transitions. [2021-11-23 17:32:58,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:32:58,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 51.833333333333336) internal successors, (311), 6 states have internal predecessors, (311), 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 974 [2021-11-23 17:32:58,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:58,351 INFO L225 Difference]: With dead ends: 9516 [2021-11-23 17:32:58,352 INFO L226 Difference]: Without dead ends: 4801 [2021-11-23 17:32:58,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2919 GetRequests, 2894 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=148, Invalid=505, Unknown=1, NotChecked=48, Total=702 [2021-11-23 17:32:58,358 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 35 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:58,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 255 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 17:32:58,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4801 states. [2021-11-23 17:32:58,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4801 to 4801. [2021-11-23 17:32:58,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4801 states, 4800 states have (on average 1.0625) internal successors, (5100), 4800 states have internal predecessors, (5100), 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 17:32:58,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4801 states to 4801 states and 5100 transitions. [2021-11-23 17:32:58,437 INFO L78 Accepts]: Start accepts. Automaton has 4801 states and 5100 transitions. Word has length 974 [2021-11-23 17:32:58,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:58,438 INFO L470 AbstractCegarLoop]: Abstraction has 4801 states and 5100 transitions. [2021-11-23 17:32:58,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 51.833333333333336) internal successors, (311), 6 states have internal predecessors, (311), 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 17:32:58,439 INFO L276 IsEmpty]: Start isEmpty. Operand 4801 states and 5100 transitions. [2021-11-23 17:32:58,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 990 [2021-11-23 17:32:58,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:58,454 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:32:58,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:58,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:58,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:58,867 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:58,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:58,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1474873637, now seen corresponding path program 1 times [2021-11-23 17:32:58,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:58,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621733097] [2021-11-23 17:32:58,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:58,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:58,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:58,873 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:58,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d7a96ff-f10a-4062-a193-7aef1b33b3c7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 17:32:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:59,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:32:59,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3123 backedges. 1624 proven. 1115 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2021-11-23 17:33:07,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:16,280 WARN L860 $PredicateComparison]: unable to prove that (bvslt (_ bv11 32) (bvadd (_ bv42 32) (bvsrem (bvadd (_ bv464909 32) (bvsdiv (bvsdiv (bvadd (_ bv4294967295 32) (bvsrem c_~a12~0 (_ bv26 32))) (_ bv5 32)) (_ bv5 32))) (_ bv34 32)))) is different from true