./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/jm2006_variant.i --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_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/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_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-lit/jm2006_variant.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/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_530f445e-8f7a-4f45-ab44-f4be5318dad6/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 4cc4e6594048669dc8576432b007a54cfaf2cb918409d0a11b256ce036aec976 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:44:49,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:44:49,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:44:49,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:44:49,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:44:49,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:44:49,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:44:49,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:44:49,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:44:49,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:44:49,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:44:49,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:44:49,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:44:49,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:44:49,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:44:49,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:44:49,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:44:49,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:44:49,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:44:49,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:44:49,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:44:49,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:44:49,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:44:49,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:44:49,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:44:49,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:44:49,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:44:49,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:44:49,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:44:49,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:44:49,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:44:49,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:44:49,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:44:49,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:44:49,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:44:49,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:44:49,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:44:49,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:44:49,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:44:49,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:44:49,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:44:49,482 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:44:49,532 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:44:49,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:44:49,533 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:44:49,533 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:44:49,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:44:49,541 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:44:49,541 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:44:49,541 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:44:49,542 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:44:49,542 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:44:49,543 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:44:49,543 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:44:49,544 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:44:49,544 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:44:49,544 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:44:49,544 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:44:49,545 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:44:49,545 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:44:49,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:44:49,547 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:44:49,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:44:49,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:44:49,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:44:49,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:44:49,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:44:49,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:44:49,550 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:44:49,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:44:49,551 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:44:49,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:44:49,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:44:49,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:44:49,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:44:49,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:44:49,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:44:49,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:44:49,553 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:44:49,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:44:49,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:44:49,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:44:49,554 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:44:49,554 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_530f445e-8f7a-4f45-ab44-f4be5318dad6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cc4e6594048669dc8576432b007a54cfaf2cb918409d0a11b256ce036aec976 [2021-11-23 16:44:49,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:44:49,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:44:49,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:44:49,864 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:44:49,865 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:44:49,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loop-lit/jm2006_variant.i [2021-11-23 16:44:49,949 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/data/83754cd2b/1eaf0457a2b541cfb43e931ca292b69a/FLAGea421897a [2021-11-23 16:44:50,388 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:44:50,389 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/sv-benchmarks/c/loop-lit/jm2006_variant.i [2021-11-23 16:44:50,395 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/data/83754cd2b/1eaf0457a2b541cfb43e931ca292b69a/FLAGea421897a [2021-11-23 16:44:50,776 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/data/83754cd2b/1eaf0457a2b541cfb43e931ca292b69a [2021-11-23 16:44:50,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:44:50,780 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:44:50,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:44:50,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:44:50,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:44:50,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:44:50" (1/1) ... [2021-11-23 16:44:50,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b0231fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:50, skipping insertion in model container [2021-11-23 16:44:50,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:44:50" (1/1) ... [2021-11-23 16:44:50,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:44:50,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:44:51,002 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_530f445e-8f7a-4f45-ab44-f4be5318dad6/sv-benchmarks/c/loop-lit/jm2006_variant.i[895,908] [2021-11-23 16:44:51,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:44:51,029 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:44:51,041 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_530f445e-8f7a-4f45-ab44-f4be5318dad6/sv-benchmarks/c/loop-lit/jm2006_variant.i[895,908] [2021-11-23 16:44:51,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:44:51,060 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:44:51,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51 WrapperNode [2021-11-23 16:44:51,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:44:51,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:44:51,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:44:51,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:44:51,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,101 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2021-11-23 16:44:51,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:44:51,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:44:51,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:44:51,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:44:51,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:44:51,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:44:51,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:44:51,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:44:51,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:44:51,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:44:51,167 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:44:51,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:44:51,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:44:51,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:44:51,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:44:51,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:44:51,284 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:44:51,286 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:44:51,398 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:44:51,412 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 16:44:51,417 INFO L158 Benchmark]: Toolchain (without parser) took 635.59ms. Allocated memory is still 142.6MB. Free memory was 107.7MB in the beginning and 105.4MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:44:51,418 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 92.3MB. Free memory was 68.4MB in the beginning and 68.3MB in the end (delta: 28.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:44:51,419 INFO L158 Benchmark]: CACSL2BoogieTranslator took 279.45ms. Allocated memory is still 142.6MB. Free memory was 107.0MB in the beginning and 117.9MB in the end (delta: -10.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 16:44:51,420 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.74ms. Allocated memory is still 142.6MB. Free memory was 117.9MB in the beginning and 116.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:44:51,421 INFO L158 Benchmark]: Boogie Preprocessor took 23.52ms. Allocated memory is still 142.6MB. Free memory was 116.4MB in the beginning and 115.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:44:51,422 INFO L158 Benchmark]: RCFGBuilder took 287.85ms. Allocated memory is still 142.6MB. Free memory was 115.1MB in the beginning and 105.4MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 16:44:51,426 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 92.3MB. Free memory was 68.4MB in the beginning and 68.3MB in the end (delta: 28.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 279.45ms. Allocated memory is still 142.6MB. Free memory was 107.0MB in the beginning and 117.9MB in the end (delta: -10.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.74ms. Allocated memory is still 142.6MB. Free memory was 117.9MB in the beginning and 116.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.52ms. Allocated memory is still 142.6MB. Free memory was 116.4MB in the beginning and 115.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 287.85ms. Allocated memory is still 142.6MB. Free memory was 115.1MB in the beginning and 105.4MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:44:51,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/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_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/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_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-lit/jm2006_variant.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/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_530f445e-8f7a-4f45-ab44-f4be5318dad6/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 4cc4e6594048669dc8576432b007a54cfaf2cb918409d0a11b256ce036aec976 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:44:54,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:44:54,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:44:54,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:44:54,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:44:54,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:44:54,103 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:44:54,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:44:54,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:44:54,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:44:54,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:44:54,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:44:54,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:44:54,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:44:54,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:44:54,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:44:54,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:44:54,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:44:54,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:44:54,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:44:54,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:44:54,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:44:54,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:44:54,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:44:54,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:44:54,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:44:54,138 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:44:54,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:44:54,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:44:54,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:44:54,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:44:54,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:44:54,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:44:54,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:44:54,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:44:54,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:44:54,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:44:54,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:44:54,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:44:54,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:44:54,171 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:44:54,172 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:44:54,201 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:44:54,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:44:54,207 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:44:54,208 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:44:54,208 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:44:54,209 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:44:54,210 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:44:54,210 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:44:54,210 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:44:54,210 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:44:54,211 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:44:54,212 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:44:54,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:44:54,214 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:44:54,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:44:54,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:44:54,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:44:54,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:44:54,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:44:54,215 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:44:54,215 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:44:54,215 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:44:54,216 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:44:54,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:44:54,216 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:44:54,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:44:54,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:44:54,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:44:54,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:44:54,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:44:54,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:44:54,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:44:54,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:44:54,218 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:44:54,219 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:44:54,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:44:54,219 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:44:54,220 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:44:54,220 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_530f445e-8f7a-4f45-ab44-f4be5318dad6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cc4e6594048669dc8576432b007a54cfaf2cb918409d0a11b256ce036aec976 [2021-11-23 16:44:54,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:44:54,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:44:54,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:44:54,635 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:44:54,640 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:44:54,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loop-lit/jm2006_variant.i [2021-11-23 16:44:54,740 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/data/ad1a60c77/880f6142398e4cb7b71c37d40e323137/FLAGa7753cd0c [2021-11-23 16:44:55,350 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:44:55,351 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/sv-benchmarks/c/loop-lit/jm2006_variant.i [2021-11-23 16:44:55,359 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/data/ad1a60c77/880f6142398e4cb7b71c37d40e323137/FLAGa7753cd0c [2021-11-23 16:44:55,690 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/data/ad1a60c77/880f6142398e4cb7b71c37d40e323137 [2021-11-23 16:44:55,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:44:55,695 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:44:55,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:44:55,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:44:55,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:44:55,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11b2cff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55, skipping insertion in model container [2021-11-23 16:44:55,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:44:55,746 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:44:55,910 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_530f445e-8f7a-4f45-ab44-f4be5318dad6/sv-benchmarks/c/loop-lit/jm2006_variant.i[895,908] [2021-11-23 16:44:55,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:44:55,951 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:44:55,965 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_530f445e-8f7a-4f45-ab44-f4be5318dad6/sv-benchmarks/c/loop-lit/jm2006_variant.i[895,908] [2021-11-23 16:44:55,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:44:55,983 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:44:55,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55 WrapperNode [2021-11-23 16:44:55,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:44:55,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:44:55,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:44:55,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:44:55,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:56,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:56,019 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2021-11-23 16:44:56,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:44:56,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:44:56,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:44:56,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:44:56,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:56,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:56,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:56,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:56,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:56,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:56,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:56,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:44:56,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:44:56,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:44:56,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:44:56,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:56,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:44:56,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:44:56,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:44:56,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:44:56,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:44:56,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:44:56,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:44:56,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:44:56,224 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:44:56,231 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:44:56,464 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:44:56,470 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:44:56,470 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 16:44:56,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:44:56 BoogieIcfgContainer [2021-11-23 16:44:56,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:44:56,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:44:56,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:44:56,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:44:56,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:44:55" (1/3) ... [2021-11-23 16:44:56,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@85529a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:44:56, skipping insertion in model container [2021-11-23 16:44:56,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (2/3) ... [2021-11-23 16:44:56,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@85529a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:44:56, skipping insertion in model container [2021-11-23 16:44:56,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:44:56" (3/3) ... [2021-11-23 16:44:56,496 INFO L111 eAbstractionObserver]: Analyzing ICFG jm2006_variant.i [2021-11-23 16:44:56,502 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:44:56,502 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:44:56,602 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:44:56,622 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 16:44:56,623 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:44:56,665 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:44:56,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 16:44:56,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:44:56,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:44:56,672 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:44:56,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:44:56,684 INFO L85 PathProgramCache]: Analyzing trace with hash 179632146, now seen corresponding path program 1 times [2021-11-23 16:44:56,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:44:56,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247377492] [2021-11-23 16:44:56,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:44:56,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:44:56,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:44:56,706 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:44:56,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:44:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:44:56,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:44:56,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:44:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:44:57,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:44:57,169 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:44:57,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247377492] [2021-11-23 16:44:57,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247377492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:44:57,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:44:57,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 16:44:57,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212771252] [2021-11-23 16:44:57,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:44:57,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:44:57,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:44:57,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:44:57,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:44:57,223 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 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 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:44:57,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:44:57,403 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-11-23 16:44:57,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:44:57,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-23 16:44:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:44:57,419 INFO L225 Difference]: With dead ends: 38 [2021-11-23 16:44:57,419 INFO L226 Difference]: Without dead ends: 10 [2021-11-23 16:44:57,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:44:57,433 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:44:57,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 53 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:44:57,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-23 16:44:57,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-23 16:44:57,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:44:57,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-11-23 16:44:57,480 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2021-11-23 16:44:57,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:44:57,480 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-11-23 16:44:57,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:44:57,481 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-11-23 16:44:57,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 16:44:57,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:44:57,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:44:57,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:44:57,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:44:57,693 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:44:57,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:44:57,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1275235031, now seen corresponding path program 1 times [2021-11-23 16:44:57,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:44:57,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251829635] [2021-11-23 16:44:57,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:44:57,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:44:57,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:44:57,697 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:44:57,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:44:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:44:57,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:44:57,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:44:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:44:57,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:44:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:44:58,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:44:58,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251829635] [2021-11-23 16:44:58,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251829635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:44:58,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1207389069] [2021-11-23 16:44:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:44:58,221 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:44:58,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:44:58,224 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:44:58,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-23 16:44:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:44:58,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:44:58,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:44:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:44:58,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:44:58,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:44:58,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1207389069] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:44:58,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300142978] [2021-11-23 16:44:58,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:44:58,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:44:58,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:44:58,551 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:44:58,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 16:44:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:44:58,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:44:58,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:44:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:44:58,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:44:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:44:58,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300142978] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:44:58,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:44:58,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 11 [2021-11-23 16:44:58,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476044171] [2021-11-23 16:44:58,809 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:44:58,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 16:44:58,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:44:58,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 16:44:58,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-23 16:44:58,814 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:44:59,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:44:59,360 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-11-23 16:44:59,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 16:44:59,361 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 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 9 [2021-11-23 16:44:59,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:44:59,361 INFO L225 Difference]: With dead ends: 19 [2021-11-23 16:44:59,362 INFO L226 Difference]: Without dead ends: 13 [2021-11-23 16:44:59,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-11-23 16:44:59,364 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:44:59,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 25 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:44:59,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-23 16:44:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-23 16:44:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:44:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-11-23 16:44:59,369 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 9 [2021-11-23 16:44:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:44:59,370 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-11-23 16:44:59,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:44:59,370 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-11-23 16:44:59,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 16:44:59,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:44:59,371 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:44:59,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:44:59,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:44:59,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:44:59,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:44:59,984 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:44:59,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:44:59,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1159331502, now seen corresponding path program 2 times [2021-11-23 16:44:59,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:44:59,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202846516] [2021-11-23 16:44:59,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:44:59,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:44:59,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:44:59,992 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:00,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:45:00,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:45:00,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:00,051 WARN L261 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 16:45:00,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:00,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:00,862 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:00,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202846516] [2021-11-23 16:45:00,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202846516] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:00,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1002892604] [2021-11-23 16:45:00,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:45:00,863 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:00,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:00,864 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:00,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 16:45:00,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:45:00,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:00,969 WARN L261 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 16:45:00,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:01,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:01,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1002892604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:01,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001610862] [2021-11-23 16:45:01,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:45:01,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:01,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:01,451 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:01,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 16:45:01,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:45:01,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:01,512 WARN L261 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 16:45:01,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:01,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:01,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001610862] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:01,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:45:01,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10, 9, 10, 9] total 18 [2021-11-23 16:45:01,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898085433] [2021-11-23 16:45:01,873 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:45:01,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 16:45:01,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:01,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 16:45:01,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-11-23 16:45:01,876 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:03,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:03,122 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-11-23 16:45:03,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 16:45:03,123 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2021-11-23 16:45:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:03,124 INFO L225 Difference]: With dead ends: 25 [2021-11-23 16:45:03,124 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 16:45:03,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=235, Invalid=521, Unknown=0, NotChecked=0, Total=756 [2021-11-23 16:45:03,126 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 49 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:03,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 23 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:45:03,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 16:45:03,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-23 16:45:03,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-11-23 16:45:03,134 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 12 [2021-11-23 16:45:03,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:03,134 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-11-23 16:45:03,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:03,135 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-11-23 16:45:03,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 16:45:03,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:03,136 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:03,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:03,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-23 16:45:03,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-23 16:45:03,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:03,761 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:03,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:03,761 INFO L85 PathProgramCache]: Analyzing trace with hash -175103182, now seen corresponding path program 3 times [2021-11-23 16:45:03,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:03,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7628657] [2021-11-23 16:45:03,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:45:03,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:03,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:03,771 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:03,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 16:45:03,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 16:45:03,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:03,825 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 16:45:03,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:04,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:05,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:05,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7628657] [2021-11-23 16:45:05,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7628657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:05,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1873247547] [2021-11-23 16:45:05,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:45:05,611 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:05,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:05,627 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:05,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 16:45:05,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 16:45:05,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:05,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 16:45:05,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:06,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:06,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1873247547] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:06,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060188417] [2021-11-23 16:45:06,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:45:06,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:06,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:06,368 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:06,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 16:45:06,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 16:45:06,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:06,455 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 16:45:06,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:06,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:07,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060188417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:07,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:45:07,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16, 15, 16, 15] total 29 [2021-11-23 16:45:07,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382607854] [2021-11-23 16:45:07,046 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:45:07,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 16:45:07,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:07,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 16:45:07,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=620, Unknown=0, NotChecked=0, Total=812 [2021-11-23 16:45:07,049 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:11,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:11,067 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2021-11-23 16:45:11,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 16:45:11,072 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 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 18 [2021-11-23 16:45:11,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:11,073 INFO L225 Difference]: With dead ends: 37 [2021-11-23 16:45:11,073 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 16:45:11,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=614, Invalid=1366, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 16:45:11,076 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 137 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:11,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 49 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 16:45:11,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 16:45:11,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-23 16:45:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:11,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-11-23 16:45:11,086 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 18 [2021-11-23 16:45:11,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:11,086 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-11-23 16:45:11,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:11,087 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-11-23 16:45:11,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 16:45:11,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:11,088 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:11,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-23 16:45:11,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:11,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:11,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:11,696 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:11,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:11,696 INFO L85 PathProgramCache]: Analyzing trace with hash 569880306, now seen corresponding path program 4 times [2021-11-23 16:45:11,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:11,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065698119] [2021-11-23 16:45:11,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:45:11,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:11,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:11,698 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:11,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 16:45:11,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:45:11,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:11,808 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-23 16:45:11,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:14,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:16,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:16,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065698119] [2021-11-23 16:45:16,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065698119] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:16,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [385708161] [2021-11-23 16:45:16,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:45:16,111 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:16,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:16,116 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:16,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 16:45:16,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:45:16,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:16,277 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-23 16:45:16,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:17,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:17,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [385708161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:17,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865898454] [2021-11-23 16:45:17,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:45:17,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:17,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:17,416 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:17,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 16:45:17,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:45:17,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:17,533 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-23 16:45:17,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:18,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:18,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865898454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:18,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:45:18,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 28, 27, 28, 27] total 53 [2021-11-23 16:45:18,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55506888] [2021-11-23 16:45:18,521 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:45:18,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-23 16:45:18,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:18,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-23 16:45:18,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=2096, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 16:45:18,524 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:36,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:36,709 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2021-11-23 16:45:36,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-23 16:45:36,711 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 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 30 [2021-11-23 16:45:36,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:36,712 INFO L225 Difference]: With dead ends: 61 [2021-11-23 16:45:36,712 INFO L226 Difference]: Without dead ends: 55 [2021-11-23 16:45:36,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=2054, Invalid=4426, Unknown=0, NotChecked=0, Total=6480 [2021-11-23 16:45:36,716 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 429 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:36,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 52 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 16:45:36,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-23 16:45:36,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-23 16:45:36,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:36,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-11-23 16:45:36,742 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 30 [2021-11-23 16:45:36,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:36,743 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-11-23 16:45:36,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:36,744 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-11-23 16:45:36,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 16:45:36,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:36,747 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:36,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:36,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:37,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:37,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:37,360 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:37,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:37,360 INFO L85 PathProgramCache]: Analyzing trace with hash 2015094386, now seen corresponding path program 5 times [2021-11-23 16:45:37,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:37,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866559155] [2021-11-23 16:45:37,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 16:45:37,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:37,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:37,362 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:37,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 16:45:37,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-23 16:45:37,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:37,634 WARN L261 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 149 conjunts are in the unsatisfiable core [2021-11-23 16:45:37,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:43,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:49,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:49,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866559155] [2021-11-23 16:45:49,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866559155] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:49,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [11832814] [2021-11-23 16:45:49,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 16:45:49,790 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:49,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:49,792 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:49,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 16:45:50,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-23 16:45:50,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:50,192 WARN L261 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 149 conjunts are in the unsatisfiable core [2021-11-23 16:45:50,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:51,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:52,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [11832814] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:52,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706001282] [2021-11-23 16:45:52,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 16:45:52,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:52,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:52,106 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:52,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 16:45:52,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-23 16:45:52,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:52,413 WARN L261 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 149 conjunts are in the unsatisfiable core [2021-11-23 16:45:52,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:53,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:54,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706001282] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:54,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:45:54,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 52, 51, 52, 51] total 101 [2021-11-23 16:45:54,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750420378] [2021-11-23 16:45:54,126 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:45:54,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-23 16:45:54,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:54,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-23 16:45:54,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2460, Invalid=7640, Unknown=0, NotChecked=0, Total=10100 [2021-11-23 16:45:54,131 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 101 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:59,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:59,390 INFO L93 Difference]: Finished difference Result 109 states and 156 transitions. [2021-11-23 16:47:59,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-23 16:47:59,394 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 states have internal predecessors, (105), 0 states have call successors, (0), 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 54 [2021-11-23 16:47:59,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:59,395 INFO L225 Difference]: With dead ends: 109 [2021-11-23 16:47:59,396 INFO L226 Difference]: Without dead ends: 103 [2021-11-23 16:47:59,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4050 ImplicationChecksByTransitivity, 129.9s TimeCoverageRelationStatistics Valid=7526, Invalid=15730, Unknown=0, NotChecked=0, Total=23256 [2021-11-23 16:47:59,403 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 1394 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2656 mSolverCounterSat, 1315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1394 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 3971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1315 IncrementalHoareTripleChecker+Valid, 2656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:59,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1394 Valid, 85 Invalid, 3971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1315 Valid, 2656 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-23 16:47:59,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-23 16:47:59,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-23 16:47:59,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:59,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-11-23 16:47:59,462 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 54 [2021-11-23 16:47:59,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:59,462 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-11-23 16:47:59,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-11-23 16:47:59,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 16:47:59,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:59,467 INFO L514 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:59,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:59,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:59,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-23 16:48:00,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:00,086 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:00,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:00,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1845024114, now seen corresponding path program 6 times [2021-11-23 16:48:00,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:00,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180164094] [2021-11-23 16:48:00,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 16:48:00,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:00,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:00,089 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:00,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 16:48:00,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2021-11-23 16:48:00,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:48:00,989 WARN L261 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 293 conjunts are in the unsatisfiable core [2021-11-23 16:48:00,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:19,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:40,857 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:40,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180164094] [2021-11-23 16:48:40,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180164094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:40,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [700796062] [2021-11-23 16:48:40,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 16:48:40,858 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:48:40,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:48:40,868 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:48:40,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 16:48:41,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2021-11-23 16:48:41,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:48:41,899 WARN L261 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 293 conjunts are in the unsatisfiable core [2021-11-23 16:48:41,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:44,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:45,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [700796062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:45,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492586536] [2021-11-23 16:48:45,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 16:48:45,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:48:45,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:48:45,548 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:48:45,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_530f445e-8f7a-4f45-ab44-f4be5318dad6/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 16:48:46,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2021-11-23 16:48:46,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:48:46,421 WARN L261 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 293 conjunts are in the unsatisfiable core [2021-11-23 16:48:46,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:48,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:49,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492586536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:49,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:48:49,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 100, 99, 100, 99] total 197 [2021-11-23 16:48:49,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033503782] [2021-11-23 16:48:49,929 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:48:49,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2021-11-23 16:48:49,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:49,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2021-11-23 16:48:49,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9516, Invalid=29096, Unknown=0, NotChecked=0, Total=38612 [2021-11-23 16:48:49,942 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 197 states, 197 states have (on average 1.0203045685279188) internal successors, (201), 197 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:27,933 WARN L227 SmtUtils]: Spent 6.55s on a formula simplification that was a NOOP. DAG size: 816 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:49:59,610 WARN L227 SmtUtils]: Spent 6.87s on a formula simplification that was a NOOP. DAG size: 808 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:50:30,423 WARN L227 SmtUtils]: Spent 6.88s on a formula simplification that was a NOOP. DAG size: 799 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:50:51,309 WARN L227 SmtUtils]: Spent 6.26s on a formula simplification that was a NOOP. DAG size: 791 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:51:12,285 WARN L227 SmtUtils]: Spent 6.28s on a formula simplification that was a NOOP. DAG size: 782 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:51:33,307 WARN L227 SmtUtils]: Spent 6.50s on a formula simplification that was a NOOP. DAG size: 774 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:51:55,304 WARN L227 SmtUtils]: Spent 6.49s on a formula simplification that was a NOOP. DAG size: 765 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:52:16,323 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 757 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:52:37,342 WARN L227 SmtUtils]: Spent 6.28s on a formula simplification that was a NOOP. DAG size: 748 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:52:57,885 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 740 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:53:18,833 WARN L227 SmtUtils]: Spent 6.52s on a formula simplification that was a NOOP. DAG size: 731 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:53:37,200 WARN L227 SmtUtils]: Spent 5.36s on a formula simplification that was a NOOP. DAG size: 723 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:54:12,145 WARN L227 SmtUtils]: Spent 5.27s on a formula simplification that was a NOOP. DAG size: 706 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:54:30,470 WARN L227 SmtUtils]: Spent 5.51s on a formula simplification that was a NOOP. DAG size: 697 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:54:49,336 WARN L227 SmtUtils]: Spent 5.51s on a formula simplification that was a NOOP. DAG size: 689 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:55:07,387 WARN L227 SmtUtils]: Spent 5.27s on a formula simplification that was a NOOP. DAG size: 680 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:55:25,724 WARN L227 SmtUtils]: Spent 5.36s on a formula simplification that was a NOOP. DAG size: 672 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:55:59,807 WARN L227 SmtUtils]: Spent 5.16s on a formula simplification that was a NOOP. DAG size: 655 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)