./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/num_conversion_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs --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 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:14:31,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:14:31,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:14:31,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:14:31,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:14:31,414 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:14:31,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:14:31,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:14:31,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:14:31,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:14:31,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:14:31,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:14:31,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:14:31,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:14:31,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:14:31,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:14:31,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:14:31,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:14:31,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:14:31,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:14:31,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:14:31,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:14:31,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:14:31,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:14:31,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:14:31,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:14:31,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:14:31,472 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:14:31,473 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:14:31,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:14:31,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:14:31,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:14:31,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:14:31,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:14:31,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:14:31,481 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:14:31,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:14:31,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:14:31,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:14:31,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:14:31,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:14:31,494 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:14:31,550 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:14:31,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:14:31,552 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:14:31,553 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:14:31,553 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:14:31,553 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:14:31,554 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:14:31,554 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:14:31,554 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:14:31,554 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:14:31,556 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:14:31,556 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:14:31,556 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:14:31,557 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:14:31,557 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:14:31,557 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:14:31,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:14:31,559 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:14:31,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:14:31,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:14:31,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:14:31,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:14:31,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:14:31,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:14:31,561 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:14:31,561 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:14:31,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:14:31,562 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:14:31,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:14:31,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:14:31,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:14:31,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:31,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:14:31,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:14:31,566 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:14:31,567 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:14:31,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:14:31,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:14:31,567 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:14:31,568 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:14:31,568 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_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2021-11-19 14:14:31,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:14:31,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:14:31,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:14:31,980 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:14:31,981 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:14:31,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-19 14:14:32,056 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/data/fd56b7383/05a7dba8262148daa4c1d51255fda07f/FLAG96c9320c0 [2021-11-19 14:14:32,663 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:14:32,664 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-19 14:14:32,678 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/data/fd56b7383/05a7dba8262148daa4c1d51255fda07f/FLAG96c9320c0 [2021-11-19 14:14:32,993 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/data/fd56b7383/05a7dba8262148daa4c1d51255fda07f [2021-11-19 14:14:32,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:14:33,001 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:14:33,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:33,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:14:33,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:14:33,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:32" (1/1) ... [2021-11-19 14:14:33,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45c5416e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:33, skipping insertion in model container [2021-11-19 14:14:33,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:32" (1/1) ... [2021-11-19 14:14:33,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:14:33,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:33,302 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_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-19 14:14:33,332 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:33,344 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:14:33,362 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_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-19 14:14:33,372 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:33,391 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:14:33,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:33 WrapperNode [2021-11-19 14:14:33,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:33,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:33,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:14:33,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:14:33,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:33" (1/1) ... [2021-11-19 14:14:33,413 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:33" (1/1) ... [2021-11-19 14:14:33,437 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-11-19 14:14:33,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:33,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:14:33,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:14:33,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:14:33,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:33" (1/1) ... [2021-11-19 14:14:33,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:33" (1/1) ... [2021-11-19 14:14:33,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:33" (1/1) ... [2021-11-19 14:14:33,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:33" (1/1) ... [2021-11-19 14:14:33,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:33" (1/1) ... [2021-11-19 14:14:33,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:33" (1/1) ... [2021-11-19 14:14:33,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:33" (1/1) ... [2021-11-19 14:14:33,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:14:33,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:14:33,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:14:33,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:14:33,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:33" (1/1) ... [2021-11-19 14:14:33,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:33,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:33,532 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:14:33,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:14:33,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:14:33,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:14:33,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:14:33,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:14:33,686 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:14:33,689 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:14:33,862 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:14:33,912 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:14:33,912 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:14:33,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:33 BoogieIcfgContainer [2021-11-19 14:14:33,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:14:33,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:14:33,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:14:33,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:14:33,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:14:32" (1/3) ... [2021-11-19 14:14:33,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e75635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:33, skipping insertion in model container [2021-11-19 14:14:33,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:33" (2/3) ... [2021-11-19 14:14:33,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e75635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:33, skipping insertion in model container [2021-11-19 14:14:33,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:33" (3/3) ... [2021-11-19 14:14:33,927 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2021-11-19 14:14:33,934 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:14:33,935 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:14:34,026 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:14:34,040 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 [2021-11-19 14:14:34,040 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:14:34,073 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) 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) [2021-11-19 14:14:34,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-19 14:14:34,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:34,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-19 14:14:34,080 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:34,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:34,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2065991, now seen corresponding path program 1 times [2021-11-19 14:14:34,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:14:34,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954604774] [2021-11-19 14:14:34,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:34,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:14:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:34,367 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:14:34,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954604774] [2021-11-19 14:14:34,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954604774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:34,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:34,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 14:14:34,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675632368] [2021-11-19 14:14:34,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:34,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:14:34,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:14:34,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:14:34,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:14:34,470 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-19 14:14:34,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:34,520 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-19 14:14:34,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:14:34,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-11-19 14:14:34,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:34,533 INFO L225 Difference]: With dead ends: 13 [2021-11-19 14:14:34,533 INFO L226 Difference]: Without dead ends: 6 [2021-11-19 14:14:34,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:14:34,542 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:34,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:34,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-19 14:14:34,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-19 14:14:34,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-11-19 14:14:34,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-19 14:14:34,583 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-19 14:14:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:34,584 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-19 14:14:34,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-19 14:14:34,585 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-19 14:14:34,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-19 14:14:34,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:34,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-19 14:14:34,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:14:34,587 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:34,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:34,588 INFO L85 PathProgramCache]: Analyzing trace with hash 64150435, now seen corresponding path program 1 times [2021-11-19 14:14:34,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:14:34,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052234921] [2021-11-19 14:14:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:34,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:14:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:34,699 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:14:34,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052234921] [2021-11-19 14:14:34,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052234921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:34,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317713433] [2021-11-19 14:14:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:34,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:34,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:34,708 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:14:34,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:14:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:34,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:14:34,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:34,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:34,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317713433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:34,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1844617735] [2021-11-19 14:14:34,974 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-19 14:14:34,975 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:14:34,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 14:14:34,988 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 14:14:34,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 14:14:35,028 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:14:35,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-19 14:14:35,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:14:35,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:14:35,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:14:35,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:14:35,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:14:35,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:14:35,256 INFO L180 QuantifierPusher]: treesize reduction 12, result has 81.3 percent of original size [2021-11-19 14:14:35,322 INFO L185 QuantifierPusher]: treesize reduction 6, result has 87.5 percent of original size 42 [2021-11-19 14:14:35,336 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 14:14:35,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 14:14:35,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:14:35,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-19 14:14:35,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652899074] [2021-11-19 14:14:35,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:14:35,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:14:35,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:14:35,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:14:35,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:14:35,542 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) [2021-11-19 14:14:35,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:35,598 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-19 14:14:35,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:14:35,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) Word has length 5 [2021-11-19 14:14:35,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:35,599 INFO L225 Difference]: With dead ends: 12 [2021-11-19 14:14:35,599 INFO L226 Difference]: Without dead ends: 9 [2021-11-19 14:14:35,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:14:35,602 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:35,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-19 14:14:35,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-19 14:14:35,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2021-11-19 14:14:35,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-19 14:14:35,607 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-19 14:14:35,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:35,607 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-19 14:14:35,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) [2021-11-19 14:14:35,608 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-19 14:14:35,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 14:14:35,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:35,609 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-19 14:14:35,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:35,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:35,810 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:35,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:35,811 INFO L85 PathProgramCache]: Analyzing trace with hash -50856633, now seen corresponding path program 2 times [2021-11-19 14:14:35,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:14:35,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819076920] [2021-11-19 14:14:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:35,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:14:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:36,042 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:14:36,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819076920] [2021-11-19 14:14:36,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819076920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:36,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215382247] [2021-11-19 14:14:36,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:14:36,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:36,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:36,051 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:14:36,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 14:14:36,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 14:14:36,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:14:36,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:14:36,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:36,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:36,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215382247] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:36,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1690630528] [2021-11-19 14:14:36,598 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-19 14:14:36,598 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:14:36,598 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 14:14:36,599 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 14:14:36,599 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 14:14:36,620 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:14:36,626 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-19 14:14:36,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:14:36,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:14:36,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:14:36,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:14:36,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:14:36,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:14:36,705 INFO L180 QuantifierPusher]: treesize reduction 12, result has 81.3 percent of original size [2021-11-19 14:14:36,754 INFO L185 QuantifierPusher]: treesize reduction 5, result has 90.9 percent of original size 50 [2021-11-19 14:14:36,766 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 14:14:37,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 14:14:37,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:14:37,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2021-11-19 14:14:37,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969279070] [2021-11-19 14:14:37,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:14:37,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 14:14:37,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:14:37,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 14:14:37,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:14:37,023 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 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) [2021-11-19 14:14:37,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:37,647 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-19 14:14:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:14:37,649 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 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) Word has length 8 [2021-11-19 14:14:37,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:37,650 INFO L225 Difference]: With dead ends: 18 [2021-11-19 14:14:37,650 INFO L226 Difference]: Without dead ends: 15 [2021-11-19 14:14:37,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2021-11-19 14:14:37,653 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:37,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:37,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-19 14:14:37,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-19 14:14:37,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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) [2021-11-19 14:14:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-19 14:14:37,660 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2021-11-19 14:14:37,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:37,660 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-19 14:14:37,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 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) [2021-11-19 14:14:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-19 14:14:37,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 14:14:37,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:37,662 INFO L514 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2021-11-19 14:14:37,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:37,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:37,879 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:37,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:37,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1522332743, now seen corresponding path program 3 times [2021-11-19 14:14:37,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:14:37,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206795928] [2021-11-19 14:14:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:37,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:14:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:14:37,952 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 14:14:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:14:38,047 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-19 14:14:38,048 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 14:14:38,050 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 14:14:38,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 14:14:38,057 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1] [2021-11-19 14:14:38,061 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 14:14:38,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 02:14:38 BoogieIcfgContainer [2021-11-19 14:14:38,094 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 14:14:38,095 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 14:14:38,095 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 14:14:38,095 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 14:14:38,096 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:33" (3/4) ... [2021-11-19 14:14:38,100 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-19 14:14:38,100 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 14:14:38,101 INFO L158 Benchmark]: Toolchain (without parser) took 5103.01ms. Allocated memory was 86.0MB in the beginning and 119.5MB in the end (delta: 33.6MB). Free memory was 49.8MB in the beginning and 78.5MB in the end (delta: -28.7MB). Peak memory consumption was 4.1MB. Max. memory is 16.1GB. [2021-11-19 14:14:38,101 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 86.0MB. Free memory is still 65.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:14:38,102 INFO L158 Benchmark]: CACSL2BoogieTranslator took 385.78ms. Allocated memory was 86.0MB in the beginning and 119.5MB in the end (delta: 33.6MB). Free memory was 49.4MB in the beginning and 95.8MB in the end (delta: -46.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 14:14:38,103 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.50ms. Allocated memory is still 119.5MB. Free memory was 95.8MB in the beginning and 94.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:14:38,103 INFO L158 Benchmark]: Boogie Preprocessor took 50.51ms. Allocated memory is still 119.5MB. Free memory was 94.1MB in the beginning and 93.1MB in the end (delta: 975.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:14:38,104 INFO L158 Benchmark]: RCFGBuilder took 425.45ms. Allocated memory is still 119.5MB. Free memory was 93.1MB in the beginning and 83.2MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 14:14:38,105 INFO L158 Benchmark]: TraceAbstraction took 4175.92ms. Allocated memory is still 119.5MB. Free memory was 82.7MB in the beginning and 78.9MB in the end (delta: 3.7MB). Peak memory consumption was 4.7MB. Max. memory is 16.1GB. [2021-11-19 14:14:38,105 INFO L158 Benchmark]: Witness Printer took 5.41ms. Allocated memory is still 119.5MB. Free memory was 78.9MB in the beginning and 78.5MB in the end (delta: 443.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:14:38,109 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 86.0MB. Free memory is still 65.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 385.78ms. Allocated memory was 86.0MB in the beginning and 119.5MB in the end (delta: 33.6MB). Free memory was 49.4MB in the beginning and 95.8MB in the end (delta: -46.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.50ms. Allocated memory is still 119.5MB. Free memory was 95.8MB in the beginning and 94.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.51ms. Allocated memory is still 119.5MB. Free memory was 94.1MB in the beginning and 93.1MB in the end (delta: 975.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 425.45ms. Allocated memory is still 119.5MB. Free memory was 93.1MB in the beginning and 83.2MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 4175.92ms. Allocated memory is still 119.5MB. Free memory was 82.7MB in the beginning and 78.9MB in the end (delta: 3.7MB). Peak memory consumption was 4.7MB. Max. memory is 16.1GB. * Witness Printer took 5.41ms. Allocated memory is still 119.5MB. Free memory was 78.9MB in the beginning and 78.5MB in the end (delta: 443.0kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 31, overapproximation of bitwiseAnd at line 32. Possible FailurePath: [L24] unsigned char x = __VERIFIER_nondet_uchar(); [L25] unsigned char y; [L26] unsigned char c; [L28] y = 0 [L29] c = 0 VAL [c=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND TRUE bit != (unsigned char)0 [L34] y = y + i [L36] c = c + ((unsigned char)1) VAL [bit=1, c=1, i=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND TRUE bit != (unsigned char)0 [L34] y = y + i [L36] c = c + ((unsigned char)1) VAL [bit=1, c=2, i=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND TRUE bit != (unsigned char)0 [L34] y = y + i [L36] c = c + ((unsigned char)1) VAL [bit=1, c=3, i=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND FALSE !(bit != (unsigned char)0) [L36] c = c + ((unsigned char)1) VAL [bit=0, c=4, i=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND TRUE bit != (unsigned char)0 [L34] y = y + i [L36] c = c + ((unsigned char)1) VAL [bit=1, c=5, i=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND TRUE bit != (unsigned char)0 [L34] y = y + i [L36] c = c + ((unsigned char)1) VAL [bit=1, c=6, i=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND TRUE bit != (unsigned char)0 [L34] y = y + i [L36] c = c + ((unsigned char)1) VAL [bit=1, c=7, i=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND FALSE !(bit != (unsigned char)0) [L36] c = c + ((unsigned char)1) VAL [bit=0, c=8, i=0, y=0] [L30] COND FALSE !(c < (unsigned char)8) [L38] CALL __VERIFIER_assert(x == y) [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.0s, OverallIterations: 4, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 11 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11 mSDsluCounter, 22 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 16 mSDsCounter, 19 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 57 IncrementalHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19 mSolverCounterUnsat, 7 mSDtfsCounter, 57 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=3, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 234 SizeOfPredicates, 3 NumberOfNonLiveVariables, 94 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-19 14:14:38,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/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_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs --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 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:14:41,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:14:41,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:14:41,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:14:41,494 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:14:41,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:14:41,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:14:41,509 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:14:41,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:14:41,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:14:41,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:14:41,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:14:41,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:14:41,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:14:41,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:14:41,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:14:41,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:14:41,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:14:41,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:14:41,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:14:41,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:14:41,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:14:41,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:14:41,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:14:41,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:14:41,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:14:41,592 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:14:41,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:14:41,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:14:41,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:14:41,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:14:41,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:14:41,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:14:41,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:14:41,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:14:41,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:14:41,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:14:41,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:14:41,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:14:41,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:14:41,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:14:41,619 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:14:41,680 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:14:41,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:14:41,683 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:14:41,683 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:14:41,683 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:14:41,684 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:14:41,684 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:14:41,684 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:14:41,685 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:14:41,685 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:14:41,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:14:41,688 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:14:41,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:14:41,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:14:41,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:14:41,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:14:41,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:14:41,690 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:14:41,690 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:14:41,691 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:14:41,691 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:14:41,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:14:41,691 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:14:41,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:14:41,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:14:41,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:14:41,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:14:41,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:41,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:14:41,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:14:41,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:14:41,694 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:14:41,694 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:41,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:14:41,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:14:41,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:14:41,696 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_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2021-11-19 14:14:42,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:14:42,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:14:42,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:14:42,215 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:14:42,219 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:14:42,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-19 14:14:42,318 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/data/991421b09/869e38b8abd745848c062cff4a9a4641/FLAG3f75967d3 [2021-11-19 14:14:43,092 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:14:43,094 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-19 14:14:43,104 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/data/991421b09/869e38b8abd745848c062cff4a9a4641/FLAG3f75967d3 [2021-11-19 14:14:43,428 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/data/991421b09/869e38b8abd745848c062cff4a9a4641 [2021-11-19 14:14:43,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:14:43,433 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:14:43,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:43,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:14:43,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:14:43,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:43" (1/1) ... [2021-11-19 14:14:43,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e6cbd6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:43, skipping insertion in model container [2021-11-19 14:14:43,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:43" (1/1) ... [2021-11-19 14:14:43,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:14:43,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:43,675 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_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-19 14:14:43,694 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:43,710 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:14:43,726 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_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-19 14:14:43,733 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:43,750 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:14:43,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:43 WrapperNode [2021-11-19 14:14:43,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:43,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:43,753 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:14:43,753 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:14:43,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:43" (1/1) ... [2021-11-19 14:14:43,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:43" (1/1) ... [2021-11-19 14:14:43,851 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-11-19 14:14:43,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:43,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:14:43,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:14:43,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:14:43,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:43" (1/1) ... [2021-11-19 14:14:43,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:43" (1/1) ... [2021-11-19 14:14:43,883 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:43" (1/1) ... [2021-11-19 14:14:43,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:43" (1/1) ... [2021-11-19 14:14:43,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:43" (1/1) ... [2021-11-19 14:14:43,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:43" (1/1) ... [2021-11-19 14:14:43,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:43" (1/1) ... [2021-11-19 14:14:43,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:14:43,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:14:43,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:14:43,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:14:43,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:43" (1/1) ... [2021-11-19 14:14:43,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:43,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:43,957 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:14:43,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:14:44,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:14:44,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:14:44,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:14:44,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:14:44,140 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:14:44,143 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:14:44,335 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:14:44,345 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:14:44,345 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:14:44,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:44 BoogieIcfgContainer [2021-11-19 14:14:44,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:14:44,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:14:44,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:14:44,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:14:44,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:14:43" (1/3) ... [2021-11-19 14:14:44,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d3730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:44, skipping insertion in model container [2021-11-19 14:14:44,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:43" (2/3) ... [2021-11-19 14:14:44,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d3730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:44, skipping insertion in model container [2021-11-19 14:14:44,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:44" (3/3) ... [2021-11-19 14:14:44,360 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2021-11-19 14:14:44,368 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:14:44,368 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:14:44,440 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:14:44,451 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 [2021-11-19 14:14:44,451 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:14:44,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2021-11-19 14:14:44,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-19 14:14:44,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:44,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-19 14:14:44,479 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:44,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:44,487 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-11-19 14:14:44,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:44,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110134325] [2021-11-19 14:14:44,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:44,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:44,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:44,509 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:44,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:14:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:44,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:14:44,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:44,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:44,776 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:44,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110134325] [2021-11-19 14:14:44,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110134325] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:44,777 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:44,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:14:44,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652819156] [2021-11-19 14:14:44,781 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:44,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:14:44,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:44,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:14:44,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:14:44,840 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-19 14:14:44,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:44,860 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-19 14:14:44,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:14:44,863 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-11-19 14:14:44,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:44,874 INFO L225 Difference]: With dead ends: 21 [2021-11-19 14:14:44,874 INFO L226 Difference]: Without dead ends: 9 [2021-11-19 14:14:44,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:14:44,887 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:44,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:44,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-19 14:14:44,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-19 14:14:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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) [2021-11-19 14:14:44,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-19 14:14:44,936 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-11-19 14:14:44,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:44,937 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-19 14:14:44,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-19 14:14:44,938 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-19 14:14:44,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-19 14:14:44,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:44,939 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-19 14:14:44,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:45,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:45,155 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:45,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:45,159 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-11-19 14:14:45,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:45,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996133171] [2021-11-19 14:14:45,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:45,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:45,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:45,164 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:45,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:14:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:45,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:14:45,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:45,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:45,389 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:45,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996133171] [2021-11-19 14:14:45,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996133171] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:45,390 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:45,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:14:45,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471242691] [2021-11-19 14:14:45,391 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:45,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:14:45,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:45,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:14:45,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:14:45,395 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-11-19 14:14:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:45,447 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2021-11-19 14:14:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:14:45,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 6 [2021-11-19 14:14:45,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:45,449 INFO L225 Difference]: With dead ends: 17 [2021-11-19 14:14:45,450 INFO L226 Difference]: Without dead ends: 13 [2021-11-19 14:14:45,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:14:45,452 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:45,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 14 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:45,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-19 14:14:45,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-19 14:14:45,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2021-11-19 14:14:45,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-19 14:14:45,460 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 6 [2021-11-19 14:14:45,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:45,461 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-19 14:14:45,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-11-19 14:14:45,461 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-19 14:14:45,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 14:14:45,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:45,463 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:45,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:45,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:45,677 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:45,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:45,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1950053902, now seen corresponding path program 1 times [2021-11-19 14:14:45,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:45,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953578398] [2021-11-19 14:14:45,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:45,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:45,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:45,681 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:45,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:14:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:45,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:14:45,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:45,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:46,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:46,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953578398] [2021-11-19 14:14:46,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953578398] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:46,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2060895441] [2021-11-19 14:14:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:46,021 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:46,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:14:46,032 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:14:46,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-19 14:14:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:46,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:14:46,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:46,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:46,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2060895441] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:46,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061853251] [2021-11-19 14:14:46,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:46,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:46,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:46,302 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:14:46,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 14:14:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:46,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:14:46,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:46,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:46,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061853251] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:46,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:14:46,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 10 [2021-11-19 14:14:46,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797661086] [2021-11-19 14:14:46,695 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:14:46,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:14:46,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:46,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:14:46,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:14:46,701 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 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) [2021-11-19 14:14:46,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:46,913 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-11-19 14:14:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:14:46,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 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 [2021-11-19 14:14:46,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:46,915 INFO L225 Difference]: With dead ends: 29 [2021-11-19 14:14:46,916 INFO L226 Difference]: Without dead ends: 25 [2021-11-19 14:14:46,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:14:46,919 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:46,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:46,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-19 14:14:46,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-19 14:14:46,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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) [2021-11-19 14:14:46,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-11-19 14:14:46,932 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 12 [2021-11-19 14:14:46,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:46,934 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-11-19 14:14:46,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 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) [2021-11-19 14:14:46,935 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-11-19 14:14:46,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:14:46,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:46,938 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:46,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-19 14:14:47,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:47,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:47,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:47,556 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:47,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:47,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1786738894, now seen corresponding path program 2 times [2021-11-19 14:14:47,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:47,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136608761] [2021-11-19 14:14:47,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:14:47,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:47,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:47,562 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:47,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:14:47,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:14:47,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:14:47,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:14:47,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:47,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:48,027 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:48,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136608761] [2021-11-19 14:14:48,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136608761] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:48,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2131472016] [2021-11-19 14:14:48,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:14:48,029 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:48,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:14:48,051 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:14:48,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-19 14:14:48,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:14:48,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:14:48,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:14:48,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:48,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:48,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2131472016] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:48,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048712803] [2021-11-19 14:14:48,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:14:48,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:48,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:48,402 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:14:48,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 14:14:48,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:14:48,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:14:48,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:14:48,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:48,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:49,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048712803] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:49,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:14:49,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 10] total 22 [2021-11-19 14:14:49,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204013740] [2021-11-19 14:14:49,073 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:14:49,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 14:14:49,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:49,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 14:14:49,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:14:49,077 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 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) [2021-11-19 14:14:49,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:49,634 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2021-11-19 14:14:49,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 14:14:49,635 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 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 24 [2021-11-19 14:14:49,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:49,637 INFO L225 Difference]: With dead ends: 53 [2021-11-19 14:14:49,637 INFO L226 Difference]: Without dead ends: 49 [2021-11-19 14:14:49,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2021-11-19 14:14:49,639 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 132 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:49,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 134 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:49,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-19 14:14:49,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-19 14:14:49,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:14:49,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2021-11-19 14:14:49,650 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 24 [2021-11-19 14:14:49,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:49,651 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2021-11-19 14:14:49,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 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) [2021-11-19 14:14:49,651 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2021-11-19 14:14:49,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 14:14:49,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:49,652 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:49,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-19 14:14:49,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:50,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:50,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:50,254 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:50,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:50,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2021-11-19 14:14:50,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:50,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527342981] [2021-11-19 14:14:50,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:14:50,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:50,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:50,258 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:50,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:14:50,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 14:14:50,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:14:50,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-19 14:14:50,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:54,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:00,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:00,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527342981] [2021-11-19 14:15:00,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527342981] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:00,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [676985918] [2021-11-19 14:15:00,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:15:00,107 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:15:00,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:15:00,117 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:15:00,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 14:15:00,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 14:15:00,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:15:00,200 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-19 14:15:00,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:01,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:03,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [676985918] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:03,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868318733] [2021-11-19 14:15:03,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:15:03,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:15:03,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:15:03,747 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:15:03,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 14:15:03,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 14:15:03,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:15:03,826 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-19 14:15:03,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:07,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:11,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868318733] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:11,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:15:11,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 82 [2021-11-19 14:15:11,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929287208] [2021-11-19 14:15:11,964 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:15:11,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-19 14:15:11,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:11,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-19 14:15:11,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1741, Invalid=4901, Unknown=0, NotChecked=0, Total=6642 [2021-11-19 14:15:11,975 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 82 states have internal predecessors, (88), 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) [2021-11-19 14:15:12,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:12,809 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2021-11-19 14:15:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 14:15:12,810 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 82 states have internal predecessors, (88), 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 [2021-11-19 14:15:12,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:12,812 INFO L225 Difference]: With dead ends: 96 [2021-11-19 14:15:12,812 INFO L226 Difference]: Without dead ends: 70 [2021-11-19 14:15:12,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3592 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=2019, Invalid=5463, Unknown=0, NotChecked=0, Total=7482 [2021-11-19 14:15:12,817 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:12,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 76 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 171 Invalid, 0 Unknown, 34 Unchecked, 0.3s Time] [2021-11-19 14:15:12,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-19 14:15:12,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-19 14:15:12,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.318840579710145) internal successors, (91), 69 states have internal predecessors, (91), 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) [2021-11-19 14:15:12,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 91 transitions. [2021-11-19 14:15:12,830 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 91 transitions. Word has length 30 [2021-11-19 14:15:12,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:12,831 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 91 transitions. [2021-11-19 14:15:12,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 82 states have internal predecessors, (88), 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) [2021-11-19 14:15:12,832 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 91 transitions. [2021-11-19 14:15:12,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 14:15:12,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:12,834 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:12,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:13,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-19 14:15:13,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:13,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:15:13,440 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:13,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:13,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1777786732, now seen corresponding path program 1 times [2021-11-19 14:15:13,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:13,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187331028] [2021-11-19 14:15:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:13,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:13,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:13,444 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:13,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:15:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:13,482 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-19 14:15:13,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:14,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:19,142 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:19,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187331028] [2021-11-19 14:15:19,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187331028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:19,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [128619268] [2021-11-19 14:15:19,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:19,143 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:15:19,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:15:19,152 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:15:19,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 14:15:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:19,268 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-19 14:15:19,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:19,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:21,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [128619268] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:21,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841064417] [2021-11-19 14:15:21,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:21,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:15:21,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:15:21,021 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:15:21,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 14:15:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:21,060 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-19 14:15:21,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:22,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:15:29,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841064417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:15:29,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:15:29,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-19 14:15:29,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867818366] [2021-11-19 14:15:29,032 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:15:29,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-19 14:15:29,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:29,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-19 14:15:29,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1214, Invalid=5106, Unknown=0, NotChecked=0, Total=6320 [2021-11-19 14:15:29,039 INFO L87 Difference]: Start difference. First operand 70 states and 91 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) [2021-11-19 14:16:34,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:34,787 INFO L93 Difference]: Finished difference Result 377 states and 478 transitions. [2021-11-19 14:16:34,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2021-11-19 14:16:34,788 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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 [2021-11-19 14:16:34,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:34,795 INFO L225 Difference]: With dead ends: 377 [2021-11-19 14:16:34,796 INFO L226 Difference]: Without dead ends: 365 [2021-11-19 14:16:34,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 100 SyntacticMatches, 8 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20759 ImplicationChecksByTransitivity, 71.2s TimeCoverageRelationStatistics Valid=8413, Invalid=54337, Unknown=0, NotChecked=0, Total=62750 [2021-11-19 14:16:34,810 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 571 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:34,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 166 Invalid, 2867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 1969 Invalid, 0 Unknown, 281 Unchecked, 4.4s Time] [2021-11-19 14:16:34,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-19 14:16:34,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 262. [2021-11-19 14:16:34,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.3524904214559388) internal successors, (353), 261 states have internal predecessors, (353), 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) [2021-11-19 14:16:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 353 transitions. [2021-11-19 14:16:34,856 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 353 transitions. Word has length 30 [2021-11-19 14:16:34,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:34,857 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 353 transitions. [2021-11-19 14:16:34,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) [2021-11-19 14:16:34,858 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 353 transitions. [2021-11-19 14:16:34,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 14:16:34,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:34,860 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:34,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:35,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:35,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:35,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:35,462 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:35,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:35,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1894380496, now seen corresponding path program 2 times [2021-11-19 14:16:35,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:35,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665626976] [2021-11-19 14:16:35,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:16:35,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:35,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:35,464 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:35,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:16:35,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:16:35,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:16:35,487 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-19 14:16:35,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:36,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:39,998 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:39,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665626976] [2021-11-19 14:16:39,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665626976] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:16:39,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [607418161] [2021-11-19 14:16:39,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:16:39,999 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:16:40,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:16:40,010 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:16:40,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 14:16:40,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:16:40,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:16:40,080 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-19 14:16:40,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:40,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:41,299 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:41,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [607418161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:16:41,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723213514] [2021-11-19 14:16:41,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:16:41,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:16:41,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:41,314 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:16:41,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 14:16:41,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:16:41,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:16:41,353 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-19 14:16:41,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:42,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:47,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723213514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:16:47,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:16:47,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-19 14:16:47,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749349919] [2021-11-19 14:16:47,588 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:16:47,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-19 14:16:47,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:47,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-19 14:16:47,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1164, Invalid=5156, Unknown=0, NotChecked=0, Total=6320 [2021-11-19 14:16:47,591 INFO L87 Difference]: Start difference. First operand 262 states and 353 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) [2021-11-19 14:17:59,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:59,459 INFO L93 Difference]: Finished difference Result 469 states and 602 transitions. [2021-11-19 14:17:59,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2021-11-19 14:17:59,459 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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 [2021-11-19 14:17:59,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:59,462 INFO L225 Difference]: With dead ends: 469 [2021-11-19 14:17:59,462 INFO L226 Difference]: Without dead ends: 410 [2021-11-19 14:17:59,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20021 ImplicationChecksByTransitivity, 76.2s TimeCoverageRelationStatistics Valid=10088, Invalid=54682, Unknown=0, NotChecked=0, Total=64770 [2021-11-19 14:17:59,477 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 606 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1974 mSolverCounterSat, 704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 1974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:59,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 118 Invalid, 2853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [704 Valid, 1974 Invalid, 0 Unknown, 175 Unchecked, 3.4s Time] [2021-11-19 14:17:59,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-19 14:17:59,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 262. [2021-11-19 14:17:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.3448275862068966) internal successors, (351), 261 states have internal predecessors, (351), 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) [2021-11-19 14:17:59,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 351 transitions. [2021-11-19 14:17:59,552 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 351 transitions. Word has length 30 [2021-11-19 14:17:59,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:59,553 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 351 transitions. [2021-11-19 14:17:59,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) [2021-11-19 14:17:59,553 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 351 transitions. [2021-11-19 14:17:59,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 14:17:59,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:59,556 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:59,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:59,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:59,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:18:00,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:18:00,165 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:18:00,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:18:00,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1978693868, now seen corresponding path program 3 times [2021-11-19 14:18:00,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:18:00,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926158966] [2021-11-19 14:18:00,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:18:00,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:18:00,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:18:00,167 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:18:00,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:18:00,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 14:18:00,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:18:00,201 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 14:18:00,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:18:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:18:02,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:18:07,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:18:07,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926158966] [2021-11-19 14:18:07,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926158966] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:18:07,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [360683387] [2021-11-19 14:18:07,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:18:07,234 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:18:07,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:18:07,235 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:18:07,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-19 14:18:07,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 14:18:07,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:18:07,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 14:18:07,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:18:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:18:08,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:18:09,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [360683387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:18:09,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800353428] [2021-11-19 14:18:09,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:18:09,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:18:09,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:18:09,807 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:18:09,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 14:18:09,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 14:18:09,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:18:09,849 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-19 14:18:09,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:18:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:18:12,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:18:16,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800353428] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:18:16,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:18:16,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 83 [2021-11-19 14:18:16,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239910043] [2021-11-19 14:18:16,757 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:18:16,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-19 14:18:16,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:18:16,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-19 14:18:16,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1407, Invalid=5399, Unknown=0, NotChecked=0, Total=6806 [2021-11-19 14:18:16,760 INFO L87 Difference]: Start difference. First operand 262 states and 351 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 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) [2021-11-19 14:18:50,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:18:50,461 INFO L93 Difference]: Finished difference Result 496 states and 649 transitions. [2021-11-19 14:18:50,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-19 14:18:50,461 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 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 [2021-11-19 14:18:50,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:18:50,464 INFO L225 Difference]: With dead ends: 496 [2021-11-19 14:18:50,464 INFO L226 Difference]: Without dead ends: 444 [2021-11-19 14:18:50,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 9752 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=5931, Invalid=20801, Unknown=0, NotChecked=0, Total=26732 [2021-11-19 14:18:50,468 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 320 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 990 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:18:50,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 59 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 582 Invalid, 0 Unknown, 990 Unchecked, 1.0s Time] [2021-11-19 14:18:50,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-19 14:18:50,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 296. [2021-11-19 14:18:50,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.335593220338983) internal successors, (394), 295 states have internal predecessors, (394), 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) [2021-11-19 14:18:50,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 394 transitions. [2021-11-19 14:18:50,504 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 394 transitions. Word has length 30 [2021-11-19 14:18:50,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:18:50,504 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 394 transitions. [2021-11-19 14:18:50,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 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) [2021-11-19 14:18:50,505 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 394 transitions. [2021-11-19 14:18:50,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 14:18:50,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:18:50,507 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 14:18:50,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:18:50,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:18:50,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:18:51,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:18:51,113 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:18:51,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:18:51,113 INFO L85 PathProgramCache]: Analyzing trace with hash -2035952170, now seen corresponding path program 4 times [2021-11-19 14:18:51,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:18:51,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317236134] [2021-11-19 14:18:51,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:18:51,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:18:51,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:18:51,115 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:18:51,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:18:51,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:18:51,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:18:51,143 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-19 14:18:51,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:18:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:18:52,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:18:56,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:18:56,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317236134] [2021-11-19 14:18:56,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317236134] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:18:56,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [379617275] [2021-11-19 14:18:56,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:18:56,442 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:18:56,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:18:56,443 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:18:56,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 14:18:56,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:18:56,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:18:56,506 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-19 14:18:56,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:18:57,117 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:18:57,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:18:57,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [379617275] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:18:57,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99036457] [2021-11-19 14:18:57,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:18:57,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:18:57,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:18:57,908 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:18:57,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-19 14:18:57,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:18:57,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:18:57,950 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-19 14:18:57,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:18:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:18:59,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:19:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:19:05,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99036457] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:19:05,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:19:05,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-19 14:19:05,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414235064] [2021-11-19 14:19:05,123 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:19:05,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-19 14:19:05,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:19:05,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-19 14:19:05,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=5140, Unknown=0, NotChecked=0, Total=6320 [2021-11-19 14:19:05,126 INFO L87 Difference]: Start difference. First operand 296 states and 394 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) [2021-11-19 14:20:03,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:20:03,223 INFO L93 Difference]: Finished difference Result 570 states and 729 transitions. [2021-11-19 14:20:03,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2021-11-19 14:20:03,224 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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 [2021-11-19 14:20:03,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:20:03,227 INFO L225 Difference]: With dead ends: 570 [2021-11-19 14:20:03,227 INFO L226 Difference]: Without dead ends: 512 [2021-11-19 14:20:03,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13597 ImplicationChecksByTransitivity, 63.4s TimeCoverageRelationStatistics Valid=6695, Invalid=40177, Unknown=0, NotChecked=0, Total=46872 [2021-11-19 14:20:03,232 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 504 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2111 mSolverCounterSat, 720 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 3035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 720 IncrementalHoareTripleChecker+Valid, 2111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:20:03,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 141 Invalid, 3035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [720 Valid, 2111 Invalid, 0 Unknown, 204 Unchecked, 3.9s Time] [2021-11-19 14:20:03,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-19 14:20:03,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 332. [2021-11-19 14:20:03,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.3353474320241692) internal successors, (442), 331 states have internal predecessors, (442), 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) [2021-11-19 14:20:03,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 442 transitions. [2021-11-19 14:20:03,275 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 442 transitions. Word has length 30 [2021-11-19 14:20:03,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:20:03,275 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 442 transitions. [2021-11-19 14:20:03,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) [2021-11-19 14:20:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 442 transitions. [2021-11-19 14:20:03,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 14:20:03,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:20:03,277 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 14:20:03,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:20:03,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:20:03,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:20:03,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:20:03,879 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:20:03,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:20:03,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1636215058, now seen corresponding path program 5 times [2021-11-19 14:20:03,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:20:03,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830888004] [2021-11-19 14:20:03,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:20:03,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:20:03,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:20:03,881 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:20:03,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:20:03,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-19 14:20:03,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:20:03,905 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-19 14:20:03,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:20:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:20:05,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:20:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:20:08,538 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:20:08,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830888004] [2021-11-19 14:20:08,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830888004] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:20:08,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [422320623] [2021-11-19 14:20:08,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:20:08,539 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:20:08,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:20:08,540 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:20:08,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-19 14:20:08,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-19 14:20:08,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:20:08,595 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-19 14:20:08,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:20:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:20:09,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:20:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:20:10,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [422320623] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:20:10,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999342975] [2021-11-19 14:20:10,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:20:10,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:20:10,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:20:10,421 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:20:10,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-19 14:20:10,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-19 14:20:10,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:20:10,469 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-19 14:20:10,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:20:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:20:11,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:20:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:20:16,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999342975] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:20:16,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:20:16,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-19 14:20:16,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197313399] [2021-11-19 14:20:16,075 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:20:16,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-19 14:20:16,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:20:16,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-19 14:20:16,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=5140, Unknown=0, NotChecked=0, Total=6320 [2021-11-19 14:20:16,076 INFO L87 Difference]: Start difference. First operand 332 states and 442 transitions. Second operand has 80 states, 80 states have (on average 1.1125) internal successors, (89), 80 states have internal predecessors, (89), 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) [2021-11-19 14:21:10,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:21:10,916 INFO L93 Difference]: Finished difference Result 575 states and 744 transitions. [2021-11-19 14:21:10,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-11-19 14:21:10,916 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1125) internal successors, (89), 80 states have internal predecessors, (89), 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 [2021-11-19 14:21:10,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:21:10,919 INFO L225 Difference]: With dead ends: 575 [2021-11-19 14:21:10,920 INFO L226 Difference]: Without dead ends: 502 [2021-11-19 14:21:10,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12898 ImplicationChecksByTransitivity, 59.6s TimeCoverageRelationStatistics Valid=7129, Invalid=38453, Unknown=0, NotChecked=0, Total=45582 [2021-11-19 14:21:10,925 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 512 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1657 mSolverCounterSat, 745 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 745 IncrementalHoareTripleChecker+Valid, 1657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:21:10,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 86 Invalid, 2608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [745 Valid, 1657 Invalid, 0 Unknown, 206 Unchecked, 2.8s Time] [2021-11-19 14:21:10,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-11-19 14:21:10,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 328. [2021-11-19 14:21:10,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.3333333333333333) internal successors, (436), 327 states have internal predecessors, (436), 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) [2021-11-19 14:21:10,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 436 transitions. [2021-11-19 14:21:10,973 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 436 transitions. Word has length 30 [2021-11-19 14:21:10,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:21:10,973 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 436 transitions. [2021-11-19 14:21:10,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1125) internal successors, (89), 80 states have internal predecessors, (89), 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) [2021-11-19 14:21:10,974 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 436 transitions. [2021-11-19 14:21:10,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 14:21:10,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:21:10,975 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-19 14:21:11,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:11,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:11,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:11,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:21:11,593 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:21:11,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:21:11,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1578956756, now seen corresponding path program 6 times [2021-11-19 14:21:11,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:21:11,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428762144] [2021-11-19 14:21:11,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:21:11,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:21:11,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:21:11,596 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:21:11,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:21:11,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-19 14:21:11,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:21:11,628 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-19 14:21:11,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:21:13,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:21:17,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:21:17,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428762144] [2021-11-19 14:21:17,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428762144] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:21:17,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2036115162] [2021-11-19 14:21:17,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:21:17,833 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:21:17,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:21:17,834 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:21:17,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-19 14:21:17,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-19 14:21:17,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:21:17,899 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-19 14:21:17,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:21:18,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:21:19,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2036115162] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:21:19,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694606618] [2021-11-19 14:21:19,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 14:21:19,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:21:19,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:21:19,764 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:21:19,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-19 14:21:19,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-19 14:21:19,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:21:19,802 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-19 14:21:19,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:21:21,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:21:26,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694606618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:21:26,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:21:26,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 83 [2021-11-19 14:21:26,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189680974] [2021-11-19 14:21:26,805 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:21:26,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-19 14:21:26,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:21:26,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-19 14:21:26,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1274, Invalid=5532, Unknown=0, NotChecked=0, Total=6806 [2021-11-19 14:21:26,806 INFO L87 Difference]: Start difference. First operand 328 states and 436 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 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) [2021-11-19 14:22:01,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:22:01,056 INFO L93 Difference]: Finished difference Result 507 states and 652 transitions. [2021-11-19 14:22:01,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-19 14:22:01,057 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 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 [2021-11-19 14:22:01,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:22:01,060 INFO L225 Difference]: With dead ends: 507 [2021-11-19 14:22:01,060 INFO L226 Difference]: Without dead ends: 438 [2021-11-19 14:22:01,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 7645 ImplicationChecksByTransitivity, 43.0s TimeCoverageRelationStatistics Valid=4544, Invalid=20262, Unknown=0, NotChecked=0, Total=24806 [2021-11-19 14:22:01,063 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 263 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1056 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:22:01,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 123 Invalid, 2310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 942 Invalid, 0 Unknown, 1056 Unchecked, 1.4s Time] [2021-11-19 14:22:01,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-19 14:22:01,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 308. [2021-11-19 14:22:01,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.3355048859934853) internal successors, (410), 307 states have internal predecessors, (410), 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) [2021-11-19 14:22:01,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 410 transitions. [2021-11-19 14:22:01,111 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 410 transitions. Word has length 30 [2021-11-19 14:22:01,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:22:01,112 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 410 transitions. [2021-11-19 14:22:01,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 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) [2021-11-19 14:22:01,112 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 410 transitions. [2021-11-19 14:22:01,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 14:22:01,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:22:01,113 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 14:22:01,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-19 14:22:01,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:22:01,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:22:01,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:22:01,716 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:22:01,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:22:01,716 INFO L85 PathProgramCache]: Analyzing trace with hash -497923054, now seen corresponding path program 7 times [2021-11-19 14:22:01,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:22:01,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974606603] [2021-11-19 14:22:01,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:22:01,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:22:01,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:22:01,718 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:22:01,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:22:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:22:01,744 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-19 14:22:01,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:22:02,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:22:06,168 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:22:06,168 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:22:06,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974606603] [2021-11-19 14:22:06,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974606603] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:22:06,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1640221213] [2021-11-19 14:22:06,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:22:06,169 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:22:06,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:22:06,170 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:22:06,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-19 14:22:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:22:06,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-19 14:22:06,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:22:06,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:22:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:22:07,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1640221213] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:22:07,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889239112] [2021-11-19 14:22:07,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:22:07,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:22:07,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:22:07,382 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:22:07,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-19 14:22:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:22:07,415 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-19 14:22:07,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:22:08,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:22:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:22:13,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889239112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:22:13,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:22:13,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-19 14:22:13,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035151840] [2021-11-19 14:22:13,220 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:22:13,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-19 14:22:13,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:22:13,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-19 14:22:13,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=5139, Unknown=0, NotChecked=0, Total=6320 [2021-11-19 14:22:13,222 INFO L87 Difference]: Start difference. First operand 308 states and 410 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) [2021-11-19 14:23:26,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:26,561 INFO L93 Difference]: Finished difference Result 758 states and 980 transitions. [2021-11-19 14:23:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-11-19 14:23:26,562 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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 [2021-11-19 14:23:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:26,566 INFO L225 Difference]: With dead ends: 758 [2021-11-19 14:23:26,566 INFO L226 Difference]: Without dead ends: 707 [2021-11-19 14:23:26,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21518 ImplicationChecksByTransitivity, 76.7s TimeCoverageRelationStatistics Valid=10117, Invalid=59843, Unknown=0, NotChecked=0, Total=69960 [2021-11-19 14:23:26,572 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 550 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2492 mSolverCounterSat, 827 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 3580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 827 IncrementalHoareTripleChecker+Valid, 2492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:26,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 127 Invalid, 3580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [827 Valid, 2492 Invalid, 0 Unknown, 261 Unchecked, 4.0s Time] [2021-11-19 14:23:26,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-11-19 14:23:26,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 452. [2021-11-19 14:23:26,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.3481152993348116) internal successors, (608), 451 states have internal predecessors, (608), 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) [2021-11-19 14:23:26,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 608 transitions. [2021-11-19 14:23:26,668 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 608 transitions. Word has length 30 [2021-11-19 14:23:26,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:26,668 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 608 transitions. [2021-11-19 14:23:26,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) [2021-11-19 14:23:26,669 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 608 transitions. [2021-11-19 14:23:26,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 14:23:26,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:26,670 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 14:23:26,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:23:26,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:23:27,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-19 14:23:27,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:23:27,275 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:27,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:27,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1120723122, now seen corresponding path program 8 times [2021-11-19 14:23:27,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:23:27,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676264707] [2021-11-19 14:23:27,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:23:27,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:23:27,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:23:27,277 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:23:27,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-19 14:23:27,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:23:27,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:23:27,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-19 14:23:27,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:23:28,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:23:32,008 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:23:32,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676264707] [2021-11-19 14:23:32,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676264707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:23:32,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2014102815] [2021-11-19 14:23:32,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:23:32,008 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:23:32,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:23:32,009 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:23:32,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-19 14:23:32,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:23:32,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:23:32,071 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-19 14:23:32,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:23:32,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:23:33,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2014102815] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:23:33,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612116054] [2021-11-19 14:23:33,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:23:33,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:23:33,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:23:33,277 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:23:33,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-19 14:23:33,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:23:33,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:23:33,307 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-19 14:23:33,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:23:34,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:23:39,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612116054] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:23:39,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:23:39,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-19 14:23:39,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824924454] [2021-11-19 14:23:39,509 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:23:39,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-19 14:23:39,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:23:39,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-19 14:23:39,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=5163, Unknown=0, NotChecked=0, Total=6320 [2021-11-19 14:23:39,510 INFO L87 Difference]: Start difference. First operand 452 states and 608 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) [2021-11-19 14:24:52,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:24:52,833 INFO L93 Difference]: Finished difference Result 782 states and 1023 transitions. [2021-11-19 14:24:52,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-11-19 14:24:52,834 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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 [2021-11-19 14:24:52,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:24:52,837 INFO L225 Difference]: With dead ends: 782 [2021-11-19 14:24:52,837 INFO L226 Difference]: Without dead ends: 701 [2021-11-19 14:24:52,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16804 ImplicationChecksByTransitivity, 77.8s TimeCoverageRelationStatistics Valid=8983, Invalid=47899, Unknown=0, NotChecked=0, Total=56882 [2021-11-19 14:24:52,841 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 409 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 2010 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 2010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:24:52,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 164 Invalid, 2830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [675 Valid, 2010 Invalid, 0 Unknown, 145 Unchecked, 3.4s Time] [2021-11-19 14:24:52,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-11-19 14:24:52,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 485. [2021-11-19 14:24:52,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.3367768595041323) internal successors, (647), 484 states have internal predecessors, (647), 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) [2021-11-19 14:24:52,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 647 transitions. [2021-11-19 14:24:52,935 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 647 transitions. Word has length 30 [2021-11-19 14:24:52,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:24:52,936 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 647 transitions. [2021-11-19 14:24:52,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) [2021-11-19 14:24:52,936 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 647 transitions. [2021-11-19 14:24:52,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 14:24:52,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:24:52,937 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-19 14:24:52,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-19 14:24:53,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-19 14:24:53,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-19 14:24:53,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:24:53,540 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:24:53,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:24:53,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1378888560, now seen corresponding path program 9 times [2021-11-19 14:24:53,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:24:53,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085305701] [2021-11-19 14:24:53,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:24:53,541 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:24:53,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:24:53,542 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:24:53,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-19 14:24:53,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 14:24:53,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:24:53,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-19 14:24:53,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:24:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 3 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:24:56,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:25:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:25:01,685 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:25:01,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085305701] [2021-11-19 14:25:01,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085305701] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:25:01,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [598444379] [2021-11-19 14:25:01,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:25:01,686 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:25:01,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:25:01,694 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:25:01,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-19 14:25:01,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 14:25:01,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:25:01,764 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-19 14:25:01,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:25:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 3 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:25:02,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:25:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:25:04,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [598444379] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:25:04,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015742214] [2021-11-19 14:25:04,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:25:04,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:25:04,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:25:04,152 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:25:04,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-19 14:25:04,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 14:25:04,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:25:04,194 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-19 14:25:04,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:25:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:25:07,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:25:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:25:11,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015742214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:25:11,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:25:11,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 83 [2021-11-19 14:25:11,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240044820] [2021-11-19 14:25:11,122 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:25:11,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-19 14:25:11,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:25:11,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-19 14:25:11,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=5426, Unknown=0, NotChecked=0, Total=6806 [2021-11-19 14:25:11,123 INFO L87 Difference]: Start difference. First operand 485 states and 647 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 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) [2021-11-19 14:26:04,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:04,356 INFO L93 Difference]: Finished difference Result 932 states and 1222 transitions. [2021-11-19 14:26:04,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-11-19 14:26:04,358 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 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 [2021-11-19 14:26:04,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:04,362 INFO L225 Difference]: With dead ends: 932 [2021-11-19 14:26:04,362 INFO L226 Difference]: Without dead ends: 889 [2021-11-19 14:26:04,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 13319 ImplicationChecksByTransitivity, 63.4s TimeCoverageRelationStatistics Valid=7617, Invalid=30995, Unknown=0, NotChecked=0, Total=38612 [2021-11-19 14:26:04,365 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 320 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1682 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:04,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 58 Invalid, 2665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 666 Invalid, 0 Unknown, 1682 Unchecked, 1.1s Time] [2021-11-19 14:26:04,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-11-19 14:26:04,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 657. [2021-11-19 14:26:04,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 1.3399390243902438) internal successors, (879), 656 states have internal predecessors, (879), 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) [2021-11-19 14:26:04,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 879 transitions. [2021-11-19 14:26:04,496 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 879 transitions. Word has length 30 [2021-11-19 14:26:04,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:04,496 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 879 transitions. [2021-11-19 14:26:04,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 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) [2021-11-19 14:26:04,497 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 879 transitions. [2021-11-19 14:26:04,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 14:26:04,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:04,498 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-19 14:26:04,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:04,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:04,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-19 14:26:05,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:05,100 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:05,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:05,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1436146862, now seen corresponding path program 10 times [2021-11-19 14:26:05,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:05,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693808420] [2021-11-19 14:26:05,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:26:05,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:05,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:05,101 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:05,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-19 14:26:05,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:26:05,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:26:05,125 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-19 14:26:05,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:06,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:10,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:10,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693808420] [2021-11-19 14:26:10,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693808420] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:26:10,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1954024246] [2021-11-19 14:26:10,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:26:10,311 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:26:10,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:26:10,312 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:26:10,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-19 14:26:10,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:26:10,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:26:10,367 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-19 14:26:10,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:10,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:11,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1954024246] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:26:11,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278812230] [2021-11-19 14:26:11,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:26:11,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:26:11,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:26:11,624 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:26:11,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-19 14:26:11,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:26:11,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:26:11,655 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-19 14:26:11,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:12,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:18,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278812230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:26:18,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:26:18,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-19 14:26:18,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182385073] [2021-11-19 14:26:18,786 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:26:18,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-19 14:26:18,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:18,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-19 14:26:18,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=5163, Unknown=0, NotChecked=0, Total=6320 [2021-11-19 14:26:18,788 INFO L87 Difference]: Start difference. First operand 657 states and 879 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) [2021-11-19 14:27:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:23,617 INFO L93 Difference]: Finished difference Result 963 states and 1256 transitions. [2021-11-19 14:27:23,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-11-19 14:27:23,617 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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 [2021-11-19 14:27:23,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:23,622 INFO L225 Difference]: With dead ends: 963 [2021-11-19 14:27:23,622 INFO L226 Difference]: Without dead ends: 902 [2021-11-19 14:27:23,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11557 ImplicationChecksByTransitivity, 69.9s TimeCoverageRelationStatistics Valid=6474, Invalid=35756, Unknown=0, NotChecked=0, Total=42230 [2021-11-19 14:27:23,626 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 448 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 2193 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 3103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 2193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:23,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 132 Invalid, 3103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 2193 Invalid, 0 Unknown, 202 Unchecked, 4.2s Time] [2021-11-19 14:27:23,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-11-19 14:27:23,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 696. [2021-11-19 14:27:23,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 1.3410071942446042) internal successors, (932), 695 states have internal predecessors, (932), 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) [2021-11-19 14:27:23,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 932 transitions. [2021-11-19 14:27:23,785 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 932 transitions. Word has length 30 [2021-11-19 14:27:23,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:23,785 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 932 transitions. [2021-11-19 14:27:23,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) [2021-11-19 14:27:23,786 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 932 transitions. [2021-11-19 14:27:23,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 14:27:23,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:23,787 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 14:27:23,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:24,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-11-19 14:27:24,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:24,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:27:24,415 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:24,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:24,416 INFO L85 PathProgramCache]: Analyzing trace with hash 216357974, now seen corresponding path program 11 times [2021-11-19 14:27:24,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:24,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595620485] [2021-11-19 14:27:24,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:27:24,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:24,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:24,425 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:24,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-19 14:27:24,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-19 14:27:24,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:27:24,471 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-19 14:27:24,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:25,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:29,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:29,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595620485] [2021-11-19 14:27:29,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595620485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:27:29,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1372879984] [2021-11-19 14:27:29,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:27:29,270 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:27:29,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:27:29,271 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:27:29,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-19 14:27:29,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-19 14:27:29,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:27:29,328 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-19 14:27:29,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:29,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:30,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1372879984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:27:30,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862102581] [2021-11-19 14:27:30,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 14:27:30,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:27:30,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:27:30,910 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:27:30,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e3b48-7b62-4f91-a92c-d1511f0d807f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-19 14:27:30,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-19 14:27:30,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:27:30,943 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-19 14:27:30,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:31,752 INFO L328 TraceCheckSpWp]: Computing backward predicates...