./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_o10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o10.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0c292d0c9d9c055df9398b3303a92d6621b60758 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 18:53:51,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 18:53:51,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 18:53:51,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 18:53:51,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 18:53:51,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 18:53:51,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 18:53:51,703 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 18:53:51,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 18:53:51,705 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 18:53:51,706 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 18:53:51,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 18:53:51,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 18:53:51,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 18:53:51,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 18:53:51,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 18:53:51,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 18:53:51,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 18:53:51,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 18:53:51,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 18:53:51,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 18:53:51,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 18:53:51,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 18:53:51,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 18:53:51,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 18:53:51,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 18:53:51,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 18:53:51,719 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 18:53:51,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 18:53:51,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 18:53:51,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:53:51,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:53:51,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:53:51,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:53:51,722 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:53:51,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:53:51,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:53:51,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:53:51,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:53:51,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:53:51,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:53:51,725 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 18:53:51,734 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:53:51,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:53:51,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:53:51,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:53:51,735 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:53:51,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:53:51,736 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 18:53:51,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 18:53:51,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 18:53:51,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:53:51,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 18:53:51,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 18:53:51,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 18:53:51,737 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 18:53:51,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 18:53:51,737 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:53:51,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 18:53:51,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:53:51,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:53:51,738 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 18:53:51,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 18:53:51,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:53:51,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:53:51,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 18:53:51,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 18:53:51,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 18:53:51,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 18:53:51,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 18:53:51,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:53:51,739 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer 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(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer 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 -> 0c292d0c9d9c055df9398b3303a92d6621b60758 [2019-12-07 18:53:51,838 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:53:51,848 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:53:51,851 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:53:51,852 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:53:51,853 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:53:51,853 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_o10.c [2019-12-07 18:53:51,899 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/data/6e4f45612/5c4a94410ccb44ec9365d37da8f07c6e/FLAGbdc450f53 [2019-12-07 18:53:52,295 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:53:52,296 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/sv-benchmarks/c/recursive-simple/id_o10.c [2019-12-07 18:53:52,299 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/data/6e4f45612/5c4a94410ccb44ec9365d37da8f07c6e/FLAGbdc450f53 [2019-12-07 18:53:52,307 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/data/6e4f45612/5c4a94410ccb44ec9365d37da8f07c6e [2019-12-07 18:53:52,309 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:53:52,310 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 18:53:52,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:53:52,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:53:52,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:53:52,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:53:52" (1/1) ... [2019-12-07 18:53:52,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31e4a9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:53:52, skipping insertion in model container [2019-12-07 18:53:52,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:53:52" (1/1) ... [2019-12-07 18:53:52,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:53:52,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:53:52,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:53:52,430 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:53:52,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:53:52,481 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:53:52,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:53:52 WrapperNode [2019-12-07 18:53:52,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:53:52,483 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 18:53:52,483 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 18:53:52,483 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 18:53:52,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:53:52" (1/1) ... [2019-12-07 18:53:52,494 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:53:52" (1/1) ... [2019-12-07 18:53:52,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 18:53:52,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:53:52,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:53:52,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:53:52,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:53:52" (1/1) ... [2019-12-07 18:53:52,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:53:52" (1/1) ... [2019-12-07 18:53:52,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:53:52" (1/1) ... [2019-12-07 18:53:52,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:53:52" (1/1) ... [2019-12-07 18:53:52,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:53:52" (1/1) ... [2019-12-07 18:53:52,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:53:52" (1/1) ... [2019-12-07 18:53:52,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:53:52" (1/1) ... [2019-12-07 18:53:52,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:53:52,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:53:52,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:53:52,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:53:52,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:53:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:53:52,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:53:52,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:53:52,560 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-12-07 18:53:52,560 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-12-07 18:53:52,653 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:53:52,653 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 18:53:52,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:53:52 BoogieIcfgContainer [2019-12-07 18:53:52,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:53:52,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 18:53:52,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 18:53:52,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 18:53:52,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 06:53:52" (1/3) ... [2019-12-07 18:53:52,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56403dc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:53:52, skipping insertion in model container [2019-12-07 18:53:52,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:53:52" (2/3) ... [2019-12-07 18:53:52,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56403dc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:53:52, skipping insertion in model container [2019-12-07 18:53:52,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:53:52" (3/3) ... [2019-12-07 18:53:52,659 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o10.c [2019-12-07 18:53:52,665 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 18:53:52,669 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 18:53:52,676 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 18:53:52,691 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 18:53:52,691 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 18:53:52,691 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 18:53:52,691 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:53:52,691 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:53:52,691 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 18:53:52,691 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:53:52,691 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 18:53:52,702 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-12-07 18:53:52,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 18:53:52,705 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:53:52,705 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:53:52,706 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:53:52,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:53:52,709 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-12-07 18:53:52,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:53:52,715 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750058649] [2019-12-07 18:53:52,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:53:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:53:52,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750058649] [2019-12-07 18:53:52,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:53:52,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 18:53:52,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543702233] [2019-12-07 18:53:52,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:53:52,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:53:52,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:53:52,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:53:52,885 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-12-07 18:53:52,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:53:52,915 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-12-07 18:53:52,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:53:52,916 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-07 18:53:52,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:53:52,923 INFO L225 Difference]: With dead ends: 27 [2019-12-07 18:53:52,923 INFO L226 Difference]: Without dead ends: 14 [2019-12-07 18:53:52,925 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:53:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-12-07 18:53:52,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-12-07 18:53:52,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 18:53:52,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-12-07 18:53:52,950 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-12-07 18:53:52,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:53:52,951 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-12-07 18:53:52,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:53:52,951 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-12-07 18:53:52,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 18:53:52,952 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:53:52,952 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:53:52,952 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:53:52,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:53:52,952 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-12-07 18:53:52,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:53:52,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388236995] [2019-12-07 18:53:52,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:53:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 18:53:53,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388236995] [2019-12-07 18:53:53,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495509001] [2019-12-07 18:53:53,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:53:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:53,085 INFO L264 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 18:53:53,088 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:53:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 18:53:53,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:53:53,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-07 18:53:53,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998527507] [2019-12-07 18:53:53,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 18:53:53,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:53:53,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 18:53:53,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:53:53,131 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2019-12-07 18:53:53,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:53:53,151 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-12-07 18:53:53,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:53:53,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-12-07 18:53:53,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:53:53,152 INFO L225 Difference]: With dead ends: 21 [2019-12-07 18:53:53,152 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 18:53:53,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:53:53,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 18:53:53,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-12-07 18:53:53,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 18:53:53,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-12-07 18:53:53,156 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-12-07 18:53:53,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:53:53,156 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-12-07 18:53:53,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 18:53:53,157 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-12-07 18:53:53,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 18:53:53,157 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:53:53,157 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:53:53,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:53:53,358 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:53:53,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:53:53,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-12-07 18:53:53,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:53:53,361 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325724691] [2019-12-07 18:53:53,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:53:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 18:53:53,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325724691] [2019-12-07 18:53:53,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400933584] [2019-12-07 18:53:53,512 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:53:53,532 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:53:53,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:53:53,533 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 18:53:53,535 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:53:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 18:53:53,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:53:53,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-07 18:53:53,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789321164] [2019-12-07 18:53:53,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 18:53:53,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:53:53,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 18:53:53,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:53:53,562 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2019-12-07 18:53:53,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:53:53,592 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-12-07 18:53:53,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 18:53:53,592 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-12-07 18:53:53,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:53:53,593 INFO L225 Difference]: With dead ends: 24 [2019-12-07 18:53:53,593 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 18:53:53,593 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:53:53,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 18:53:53,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-12-07 18:53:53,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 18:53:53,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-12-07 18:53:53,598 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-12-07 18:53:53,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:53:53,599 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-12-07 18:53:53,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 18:53:53,599 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-12-07 18:53:53,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 18:53:53,600 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:53:53,600 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:53:53,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:53:53,801 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:53:53,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:53:53,802 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-12-07 18:53:53,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:53:53,803 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366864697] [2019-12-07 18:53:53,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:53:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:54,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 18:53:54,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366864697] [2019-12-07 18:53:54,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754185106] [2019-12-07 18:53:54,058 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:53:54,085 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 18:53:54,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:53:54,086 INFO L264 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 18:53:54,087 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:53:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 18:53:54,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:53:54,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-07 18:53:54,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206641475] [2019-12-07 18:53:54,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 18:53:54,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:53:54,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 18:53:54,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:53:54,119 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 12 states. [2019-12-07 18:53:54,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:53:54,153 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-12-07 18:53:54,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 18:53:54,154 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-12-07 18:53:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:53:54,154 INFO L225 Difference]: With dead ends: 27 [2019-12-07 18:53:54,155 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 18:53:54,155 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:53:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 18:53:54,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-12-07 18:53:54,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 18:53:54,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-12-07 18:53:54,159 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-12-07 18:53:54,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:53:54,159 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-12-07 18:53:54,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 18:53:54,159 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-12-07 18:53:54,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-07 18:53:54,160 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:53:54,160 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:53:54,361 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:53:54,362 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:53:54,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:53:54,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-12-07 18:53:54,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:53:54,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328559082] [2019-12-07 18:53:54,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:53:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-12-07 18:53:54,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328559082] [2019-12-07 18:53:54,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283943566] [2019-12-07 18:53:54,639 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:53:54,660 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:53:54,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:53:54,661 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 18:53:54,663 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:53:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-12-07 18:53:54,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:53:54,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-07 18:53:54,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230405063] [2019-12-07 18:53:54,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 18:53:54,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:53:54,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 18:53:54,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2019-12-07 18:53:54,697 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 14 states. [2019-12-07 18:53:54,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:53:54,743 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-12-07 18:53:54,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 18:53:54,743 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2019-12-07 18:53:54,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:53:54,744 INFO L225 Difference]: With dead ends: 30 [2019-12-07 18:53:54,744 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 18:53:54,745 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2019-12-07 18:53:54,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 18:53:54,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 18:53:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 18:53:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-12-07 18:53:54,748 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-12-07 18:53:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:53:54,749 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-12-07 18:53:54,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 18:53:54,749 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-12-07 18:53:54,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 18:53:54,750 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:53:54,750 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:53:54,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:53:54,952 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:53:54,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:53:54,953 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-12-07 18:53:54,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:53:54,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476494351] [2019-12-07 18:53:54,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:53:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-12-07 18:53:55,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476494351] [2019-12-07 18:53:55,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753912854] [2019-12-07 18:53:55,278 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:53:55,340 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-07 18:53:55,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:53:55,341 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 18:53:55,343 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:53:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-12-07 18:53:55,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:53:55,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-07 18:53:55,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217550497] [2019-12-07 18:53:55,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 18:53:55,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:53:55,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 18:53:55,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2019-12-07 18:53:55,373 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 16 states. [2019-12-07 18:53:55,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:53:55,435 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-12-07 18:53:55,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 18:53:55,435 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2019-12-07 18:53:55,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:53:55,436 INFO L225 Difference]: With dead ends: 33 [2019-12-07 18:53:55,436 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 18:53:55,437 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2019-12-07 18:53:55,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 18:53:55,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-12-07 18:53:55,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 18:53:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-12-07 18:53:55,441 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-12-07 18:53:55,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:53:55,442 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-12-07 18:53:55,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 18:53:55,442 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-12-07 18:53:55,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-07 18:53:55,443 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:53:55,443 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:53:55,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:53:55,645 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:53:55,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:53:55,645 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-12-07 18:53:55,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:53:55,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777741249] [2019-12-07 18:53:55,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:53:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-12-07 18:53:55,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777741249] [2019-12-07 18:53:55,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304850980] [2019-12-07 18:53:55,908 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:53:55,935 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-07 18:53:55,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:53:55,936 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-07 18:53:55,938 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:53:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-12-07 18:53:55,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:53:55,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-07 18:53:55,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822829132] [2019-12-07 18:53:55,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-07 18:53:55,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:53:55,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-07 18:53:55,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2019-12-07 18:53:55,972 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 18 states. [2019-12-07 18:53:56,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:53:56,043 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-12-07 18:53:56,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 18:53:56,043 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2019-12-07 18:53:56,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:53:56,044 INFO L225 Difference]: With dead ends: 36 [2019-12-07 18:53:56,044 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 18:53:56,044 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2019-12-07 18:53:56,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 18:53:56,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-07 18:53:56,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 18:53:56,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-12-07 18:53:56,048 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-12-07 18:53:56,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:53:56,048 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-12-07 18:53:56,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-07 18:53:56,048 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-12-07 18:53:56,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-12-07 18:53:56,049 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:53:56,049 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:53:56,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:53:56,251 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:53:56,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:53:56,252 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-12-07 18:53:56,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:53:56,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015151480] [2019-12-07 18:53:56,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:53:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-12-07 18:53:56,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015151480] [2019-12-07 18:53:56,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053612516] [2019-12-07 18:53:56,624 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:53:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:56,647 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-07 18:53:56,649 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:53:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-12-07 18:53:56,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:53:56,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-07 18:53:56,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262315303] [2019-12-07 18:53:56,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 18:53:56,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:53:56,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 18:53:56,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2019-12-07 18:53:56,687 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 20 states. [2019-12-07 18:53:56,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:53:56,773 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-12-07 18:53:56,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 18:53:56,773 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2019-12-07 18:53:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:53:56,774 INFO L225 Difference]: With dead ends: 39 [2019-12-07 18:53:56,774 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 18:53:56,775 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2019-12-07 18:53:56,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 18:53:56,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-12-07 18:53:56,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 18:53:56,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-12-07 18:53:56,778 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-12-07 18:53:56,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:53:56,778 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-12-07 18:53:56,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 18:53:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-12-07 18:53:56,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-12-07 18:53:56,779 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:53:56,779 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:53:56,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:53:56,981 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:53:56,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:53:56,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-12-07 18:53:56,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:53:56,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110728104] [2019-12-07 18:53:56,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:53:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-12-07 18:53:57,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110728104] [2019-12-07 18:53:57,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146263163] [2019-12-07 18:53:57,326 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:53:57,351 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:53:57,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:53:57,352 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-07 18:53:57,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:53:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-12-07 18:53:57,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:53:57,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-07 18:53:57,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659787142] [2019-12-07 18:53:57,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-07 18:53:57,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:53:57,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-07 18:53:57,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2019-12-07 18:53:57,400 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 22 states. [2019-12-07 18:53:57,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:53:57,513 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-12-07 18:53:57,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 18:53:57,514 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2019-12-07 18:53:57,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:53:57,514 INFO L225 Difference]: With dead ends: 42 [2019-12-07 18:53:57,514 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 18:53:57,515 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2019-12-07 18:53:57,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 18:53:57,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-07 18:53:57,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 18:53:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-12-07 18:53:57,518 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-12-07 18:53:57,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:53:57,519 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-12-07 18:53:57,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-07 18:53:57,519 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-12-07 18:53:57,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-12-07 18:53:57,520 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:53:57,520 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:53:57,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:53:57,721 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:53:57,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:53:57,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-12-07 18:53:57,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:53:57,723 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537040794] [2019-12-07 18:53:57,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:53:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:53:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-12-07 18:53:58,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537040794] [2019-12-07 18:53:58,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786448300] [2019-12-07 18:53:58,156 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:53:58,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-12-07 18:53:58,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:53:58,204 INFO L264 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-07 18:53:58,206 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:53:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-12-07 18:53:58,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:53:58,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-12-07 18:53:58,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253734362] [2019-12-07 18:53:58,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 18:53:58,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:53:58,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 18:53:58,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2019-12-07 18:53:58,263 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 24 states. [2019-12-07 18:53:58,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:53:58,422 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-12-07 18:53:58,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-07 18:53:58,422 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 63 [2019-12-07 18:53:58,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:53:58,423 INFO L225 Difference]: With dead ends: 45 [2019-12-07 18:53:58,423 INFO L226 Difference]: Without dead ends: 41 [2019-12-07 18:53:58,424 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2019-12-07 18:53:58,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-07 18:53:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-12-07 18:53:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-07 18:53:58,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-12-07 18:53:58,429 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-12-07 18:53:58,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:53:58,430 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-12-07 18:53:58,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 18:53:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-12-07 18:53:58,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-12-07 18:53:58,431 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:53:58,431 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:53:58,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:53:58,633 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:53:58,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:53:58,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-12-07 18:53:58,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:53:58,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614263710] [2019-12-07 18:53:58,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:53:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:53:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:53:58,714 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:53:58,714 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 18:53:58,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 06:53:58 BoogieIcfgContainer [2019-12-07 18:53:58,736 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 18:53:58,737 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:53:58,737 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:53:58,737 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:53:58,737 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:53:52" (3/4) ... [2019-12-07 18:53:58,739 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 18:53:58,771 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b1268dde-4224-4e29-a71a-118c6b1ad0f4/bin/uautomizer/witness.graphml [2019-12-07 18:53:58,772 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:53:58,773 INFO L168 Benchmark]: Toolchain (without parser) took 6462.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -177.5 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:53:58,773 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:53:58,774 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.50 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -147.9 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-12-07 18:53:58,774 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.08 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:53:58,774 INFO L168 Benchmark]: Boogie Preprocessor took 9.77 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:53:58,774 INFO L168 Benchmark]: RCFGBuilder took 137.44 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-12-07 18:53:58,775 INFO L168 Benchmark]: TraceAbstraction took 6081.83 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 54.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -48.7 MB). Peak memory consumption was 5.3 MB. Max. memory is 11.5 GB. [2019-12-07 18:53:58,775 INFO L168 Benchmark]: Witness Printer took 35.06 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. [2019-12-07 18:53:58,777 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 171.50 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -147.9 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.08 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.77 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 137.44 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6081.83 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 54.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -48.7 MB). Peak memory consumption was 5.3 MB. Max. memory is 11.5 GB. * Witness Printer took 35.06 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 10 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 6.0s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 203 SDtfs, 3 SDslu, 2341 SDs, 0 SdLazy, 1231 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 592 GetRequests, 454 SyntacticMatches, 9 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=10, 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, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 780 NumberOfCodeBlocks, 780 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 692 ConstructedInterpolants, 0 QuantifiedInterpolants, 122872 SizeOfPredicates, 9 NumberOfNonLiveVariables, 738 ConjunctsInSsa, 252 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 900/1800 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...