./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum01-1.i --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_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/sum01-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/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 5cba8acfa381c990ec40e4bf9e5d202ee845a576 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 18:58:34,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 18:58:34,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 18:58:34,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 18:58:34,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 18:58:34,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 18:58:34,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 18:58:35,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 18:58:35,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 18:58:35,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 18:58:35,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 18:58:35,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 18:58:35,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 18:58:35,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 18:58:35,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 18:58:35,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 18:58:35,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 18:58:35,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 18:58:35,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 18:58:35,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 18:58:35,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 18:58:35,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 18:58:35,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 18:58:35,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 18:58:35,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 18:58:35,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 18:58:35,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 18:58:35,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 18:58:35,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 18:58:35,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 18:58:35,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:58:35,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:58:35,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:58:35,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:58:35,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:58:35,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:58:35,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:58:35,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:58:35,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:58:35,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:58:35,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:58:35,023 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 18:58:35,035 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:58:35,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:58:35,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:58:35,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:58:35,036 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:58:35,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:58:35,037 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 18:58:35,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 18:58:35,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 18:58:35,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:58:35,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 18:58:35,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 18:58:35,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 18:58:35,038 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 18:58:35,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 18:58:35,038 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:58:35,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 18:58:35,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:58:35,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:58:35,039 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 18:58:35,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 18:58:35,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:58:35,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:58:35,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 18:58:35,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 18:58:35,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 18:58:35,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 18:58:35,041 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 18:58:35,041 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:58:35,041 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_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/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 -> 5cba8acfa381c990ec40e4bf9e5d202ee845a576 [2019-12-07 18:58:35,149 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:58:35,160 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:58:35,163 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:58:35,164 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:58:35,164 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:58:35,165 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/bin/uautomizer/../../sv-benchmarks/c/loops/sum01-1.i [2019-12-07 18:58:35,206 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/bin/uautomizer/data/b60ff5512/942a239d7f0c434995912443ce3eb9b6/FLAG6c3a8dd80 [2019-12-07 18:58:35,510 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:58:35,510 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/sv-benchmarks/c/loops/sum01-1.i [2019-12-07 18:58:35,513 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/bin/uautomizer/data/b60ff5512/942a239d7f0c434995912443ce3eb9b6/FLAG6c3a8dd80 [2019-12-07 18:58:35,522 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/bin/uautomizer/data/b60ff5512/942a239d7f0c434995912443ce3eb9b6 [2019-12-07 18:58:35,524 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:58:35,525 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 18:58:35,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:58:35,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:58:35,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:58:35,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:58:35" (1/1) ... [2019-12-07 18:58:35,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e36ea05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:58:35, skipping insertion in model container [2019-12-07 18:58:35,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:58:35" (1/1) ... [2019-12-07 18:58:35,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:58:35,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:58:35,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:58:35,641 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:58:35,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:58:35,694 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:58:35,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:58:35 WrapperNode [2019-12-07 18:58:35,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:58:35,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 18:58:35,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 18:58:35,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 18:58:35,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:58:35" (1/1) ... [2019-12-07 18:58:35,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:58:35" (1/1) ... [2019-12-07 18:58:35,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 18:58:35,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:58:35,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:58:35,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:58:35,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:58:35" (1/1) ... [2019-12-07 18:58:35,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:58:35" (1/1) ... [2019-12-07 18:58:35,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:58:35" (1/1) ... [2019-12-07 18:58:35,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:58:35" (1/1) ... [2019-12-07 18:58:35,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:58:35" (1/1) ... [2019-12-07 18:58:35,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:58:35" (1/1) ... [2019-12-07 18:58:35,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:58:35" (1/1) ... [2019-12-07 18:58:35,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:58:35,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:58:35,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:58:35,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:58:35,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:58:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/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 18:58:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:58:35,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:58:35,862 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:58:35,862 INFO L287 CfgBuilder]: Removed 7 assume(true) statements. [2019-12-07 18:58:35,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:58:35 BoogieIcfgContainer [2019-12-07 18:58:35,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:58:35,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 18:58:35,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 18:58:35,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 18:58:35,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 06:58:35" (1/3) ... [2019-12-07 18:58:35,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446edd12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:58:35, skipping insertion in model container [2019-12-07 18:58:35,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:58:35" (2/3) ... [2019-12-07 18:58:35,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446edd12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:58:35, skipping insertion in model container [2019-12-07 18:58:35,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:58:35" (3/3) ... [2019-12-07 18:58:35,868 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2019-12-07 18:58:35,874 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 18:58:35,878 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 18:58:35,885 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 18:58:35,899 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 18:58:35,899 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 18:58:35,899 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 18:58:35,899 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:58:35,899 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:58:35,899 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 18:58:35,900 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:58:35,900 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 18:58:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-12-07 18:58:35,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 18:58:35,911 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:58:35,912 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 18:58:35,912 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:58:35,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:58:35,916 INFO L82 PathProgramCache]: Analyzing trace with hash 30108868, now seen corresponding path program 1 times [2019-12-07 18:58:35,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:58:35,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907763131] [2019-12-07 18:58:35,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:58:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:58:35,996 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 18:58:35,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907763131] [2019-12-07 18:58:35,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:58:35,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 18:58:35,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150597312] [2019-12-07 18:58:36,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 18:58:36,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:58:36,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 18:58:36,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 18:58:36,011 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2019-12-07 18:58:36,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:58:36,020 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2019-12-07 18:58:36,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 18:58:36,021 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-12-07 18:58:36,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:58:36,026 INFO L225 Difference]: With dead ends: 18 [2019-12-07 18:58:36,027 INFO L226 Difference]: Without dead ends: 8 [2019-12-07 18:58:36,028 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 18:58:36,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-12-07 18:58:36,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-12-07 18:58:36,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-12-07 18:58:36,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-12-07 18:58:36,048 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-12-07 18:58:36,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:58:36,048 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-12-07 18:58:36,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 18:58:36,049 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-12-07 18:58:36,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 18:58:36,049 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:58:36,049 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 18:58:36,049 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:58:36,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:58:36,049 INFO L82 PathProgramCache]: Analyzing trace with hash 29781167, now seen corresponding path program 1 times [2019-12-07 18:58:36,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:58:36,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569364021] [2019-12-07 18:58:36,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:58:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:58:36,086 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 18:58:36,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569364021] [2019-12-07 18:58:36,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:58:36,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 18:58:36,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237438473] [2019-12-07 18:58:36,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 18:58:36,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:58:36,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 18:58:36,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 18:58:36,088 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2019-12-07 18:58:36,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:58:36,108 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2019-12-07 18:58:36,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 18:58:36,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-12-07 18:58:36,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:58:36,109 INFO L225 Difference]: With dead ends: 15 [2019-12-07 18:58:36,109 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 18:58:36,110 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:58:36,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 18:58:36,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-12-07 18:58:36,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 18:58:36,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-12-07 18:58:36,112 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2019-12-07 18:58:36,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:58:36,112 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-12-07 18:58:36,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 18:58:36,113 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-12-07 18:58:36,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 18:58:36,113 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:58:36,113 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:58:36,113 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:58:36,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:58:36,114 INFO L82 PathProgramCache]: Analyzing trace with hash -308490948, now seen corresponding path program 1 times [2019-12-07 18:58:36,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:58:36,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653823310] [2019-12-07 18:58:36,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:58:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:58:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:58:36,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653823310] [2019-12-07 18:58:36,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145860808] [2019-12-07 18:58:36,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/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 18:58:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:58:36,283 WARN L262 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 18:58:36,286 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:58:36,365 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:58:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:58:36,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:58:36,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2019-12-07 18:58:36,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787531938] [2019-12-07 18:58:36,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 18:58:36,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:58:36,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 18:58:36,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-12-07 18:58:36,383 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 14 states. [2019-12-07 18:58:36,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:58:36,535 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2019-12-07 18:58:36,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 18:58:36,535 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 8 [2019-12-07 18:58:36,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:58:36,536 INFO L225 Difference]: With dead ends: 31 [2019-12-07 18:58:36,536 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 18:58:36,536 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-12-07 18:58:36,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 18:58:36,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2019-12-07 18:58:36,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-12-07 18:58:36,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-12-07 18:58:36,539 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2019-12-07 18:58:36,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:58:36,539 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-12-07 18:58:36,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 18:58:36,539 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-12-07 18:58:36,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 18:58:36,540 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:58:36,540 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1] [2019-12-07 18:58:36,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:58:36,741 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:58:36,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:58:36,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1111984220, now seen corresponding path program 2 times [2019-12-07 18:58:36,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:58:36,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115952531] [2019-12-07 18:58:36,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:58:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:58:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 18:58:36,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115952531] [2019-12-07 18:58:36,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740357091] [2019-12-07 18:58:36,847 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/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 18:58:36,865 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:58:36,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:58:36,866 WARN L262 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-07 18:58:36,866 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:58:36,979 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:58:36,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:58:36,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:58:36,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2019-12-07 18:58:36,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049750007] [2019-12-07 18:58:36,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 18:58:36,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:58:36,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 18:58:36,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2019-12-07 18:58:36,992 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 19 states. [2019-12-07 18:58:37,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:58:37,325 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2019-12-07 18:58:37,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 18:58:37,325 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2019-12-07 18:58:37,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:58:37,326 INFO L225 Difference]: With dead ends: 34 [2019-12-07 18:58:37,326 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 18:58:37,327 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 18:58:37,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 18:58:37,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-12-07 18:58:37,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 18:58:37,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-12-07 18:58:37,330 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2019-12-07 18:58:37,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:58:37,330 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-12-07 18:58:37,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 18:58:37,330 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-12-07 18:58:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-07 18:58:37,331 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:58:37,331 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1] [2019-12-07 18:58:37,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:58:37,532 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:58:37,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:58:37,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1125442374, now seen corresponding path program 1 times [2019-12-07 18:58:37,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:58:37,533 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133360308] [2019-12-07 18:58:37,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:58:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:58:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:58:37,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133360308] [2019-12-07 18:58:37,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605613089] [2019-12-07 18:58:37,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/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 18:58:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:58:37,614 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 18:58:37,615 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:58:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:58:37,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:58:37,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-12-07 18:58:37,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899865959] [2019-12-07 18:58:37,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 18:58:37,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:58:37,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 18:58:37,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:58:37,622 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 7 states. [2019-12-07 18:58:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:58:37,645 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-12-07 18:58:37,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:58:37,645 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-12-07 18:58:37,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:58:37,646 INFO L225 Difference]: With dead ends: 33 [2019-12-07 18:58:37,646 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 18:58:37,646 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:58:37,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 18:58:37,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-12-07 18:58:37,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-07 18:58:37,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-12-07 18:58:37,650 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2019-12-07 18:58:37,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:58:37,650 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-12-07 18:58:37,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 18:58:37,650 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-12-07 18:58:37,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 18:58:37,651 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:58:37,651 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1] [2019-12-07 18:58:37,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:58:37,852 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:58:37,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:58:37,853 INFO L82 PathProgramCache]: Analyzing trace with hash -622858099, now seen corresponding path program 2 times [2019-12-07 18:58:37,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:58:37,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786768782] [2019-12-07 18:58:37,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:58:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:58:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:58:37,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786768782] [2019-12-07 18:58:37,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9070443] [2019-12-07 18:58:37,923 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/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 18:58:37,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:58:37,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:58:37,942 INFO L264 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 18:58:37,943 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:58:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:58:37,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:58:37,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-12-07 18:58:37,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474706162] [2019-12-07 18:58:37,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 18:58:37,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:58:37,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 18:58:37,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:58:37,948 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2019-12-07 18:58:37,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:58:37,972 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2019-12-07 18:58:37,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 18:58:37,972 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-12-07 18:58:37,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:58:37,973 INFO L225 Difference]: With dead ends: 36 [2019-12-07 18:58:37,973 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 18:58:37,973 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:58:37,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 18:58:37,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-12-07 18:58:37,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 18:58:37,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-12-07 18:58:37,976 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2019-12-07 18:58:37,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:58:37,976 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-12-07 18:58:37,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 18:58:37,976 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-12-07 18:58:37,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-07 18:58:37,977 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:58:37,977 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1] [2019-12-07 18:58:38,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:58:38,178 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:58:38,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:58:38,179 INFO L82 PathProgramCache]: Analyzing trace with hash -390715430, now seen corresponding path program 3 times [2019-12-07 18:58:38,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:58:38,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72995941] [2019-12-07 18:58:38,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:58:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:58:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:58:38,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72995941] [2019-12-07 18:58:38,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454239858] [2019-12-07 18:58:38,245 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/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 18:58:38,264 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-12-07 18:58:38,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:58:38,265 INFO L264 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 18:58:38,265 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:58:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:58:38,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:58:38,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-12-07 18:58:38,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896545326] [2019-12-07 18:58:38,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 18:58:38,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:58:38,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 18:58:38,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:58:38,271 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2019-12-07 18:58:38,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:58:38,292 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2019-12-07 18:58:38,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 18:58:38,292 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-12-07 18:58:38,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:58:38,293 INFO L225 Difference]: With dead ends: 39 [2019-12-07 18:58:38,293 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 18:58:38,293 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:58:38,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 18:58:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-12-07 18:58:38,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 18:58:38,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-12-07 18:58:38,297 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2019-12-07 18:58:38,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:58:38,298 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-12-07 18:58:38,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 18:58:38,298 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-12-07 18:58:38,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-07 18:58:38,299 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:58:38,299 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1] [2019-12-07 18:58:38,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:58:38,500 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:58:38,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:58:38,501 INFO L82 PathProgramCache]: Analyzing trace with hash 474190189, now seen corresponding path program 4 times [2019-12-07 18:58:38,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:58:38,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041590357] [2019-12-07 18:58:38,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:58:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:58:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:58:38,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041590357] [2019-12-07 18:58:38,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157029698] [2019-12-07 18:58:38,572 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/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 18:58:38,590 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:58:38,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:58:38,591 INFO L264 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 18:58:38,592 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:58:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:58:38,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:58:38,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-12-07 18:58:38,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445573384] [2019-12-07 18:58:38,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 18:58:38,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:58:38,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 18:58:38,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:58:38,598 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2019-12-07 18:58:38,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:58:38,626 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-12-07 18:58:38,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 18:58:38,626 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2019-12-07 18:58:38,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:58:38,627 INFO L225 Difference]: With dead ends: 42 [2019-12-07 18:58:38,627 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 18:58:38,627 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:58:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 18:58:38,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-12-07 18:58:38,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 18:58:38,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-12-07 18:58:38,630 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2019-12-07 18:58:38,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:58:38,630 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-12-07 18:58:38,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 18:58:38,631 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-12-07 18:58:38,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-07 18:58:38,631 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:58:38,631 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1] [2019-12-07 18:58:38,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:58:38,832 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:58:38,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:58:38,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1368677114, now seen corresponding path program 5 times [2019-12-07 18:58:38,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:58:38,833 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367373936] [2019-12-07 18:58:38,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:58:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:58:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:58:38,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367373936] [2019-12-07 18:58:38,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336909142] [2019-12-07 18:58:38,886 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/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 18:58:38,908 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-12-07 18:58:38,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:58:38,909 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 18:58:38,910 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:58:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:58:38,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:58:38,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-12-07 18:58:38,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32732654] [2019-12-07 18:58:38,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 18:58:38,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:58:38,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 18:58:38,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-07 18:58:38,916 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 11 states. [2019-12-07 18:58:38,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:58:38,945 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2019-12-07 18:58:38,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 18:58:38,946 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2019-12-07 18:58:38,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:58:38,946 INFO L225 Difference]: With dead ends: 45 [2019-12-07 18:58:38,946 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 18:58:38,947 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-07 18:58:38,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 18:58:38,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-12-07 18:58:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-12-07 18:58:38,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-12-07 18:58:38,950 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2019-12-07 18:58:38,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:58:38,950 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-12-07 18:58:38,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 18:58:38,950 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-12-07 18:58:38,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-07 18:58:38,951 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:58:38,951 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1] [2019-12-07 18:58:39,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:58:39,152 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:58:39,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:58:39,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1243411891, now seen corresponding path program 6 times [2019-12-07 18:58:39,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:58:39,154 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110785410] [2019-12-07 18:58:39,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:58:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:58:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 18:58:39,192 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 18:58:39,192 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 18:58:39,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 06:58:39 BoogieIcfgContainer [2019-12-07 18:58:39,207 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 18:58:39,207 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:58:39,207 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:58:39,208 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:58:39,208 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:58:35" (3/4) ... [2019-12-07 18:58:39,209 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 18:58:39,242 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0c661aa5-fc67-4c9c-8d62-fdbb643a4c16/bin/uautomizer/witness.graphml [2019-12-07 18:58:39,243 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:58:39,244 INFO L168 Benchmark]: Toolchain (without parser) took 3719.13 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.5 MB). Free memory was 942.5 MB in the beginning and 964.1 MB in the end (delta: -21.6 MB). Peak memory consumption was 75.9 MB. Max. memory is 11.5 GB. [2019-12-07 18:58:39,244 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:58:39,245 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.68 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.5 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -147.7 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-12-07 18:58:39,245 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.60 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 18:58:39,245 INFO L168 Benchmark]: Boogie Preprocessor took 11.61 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 18:58:39,245 INFO L168 Benchmark]: RCFGBuilder took 135.33 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: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 18:58:39,246 INFO L168 Benchmark]: TraceAbstraction took 3343.57 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 971.0 MB in the end (delta: 102.7 MB). Peak memory consumption was 102.7 MB. Max. memory is 11.5 GB. [2019-12-07 18:58:39,246 INFO L168 Benchmark]: Witness Printer took 35.31 ms. Allocated memory is still 1.1 GB. Free memory was 971.0 MB in the beginning and 964.1 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-12-07 18:58:39,248 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 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 169.68 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.5 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -147.7 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.60 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 11.61 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 135.33 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: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3343.57 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 971.0 MB in the end (delta: 102.7 MB). Peak memory consumption was 102.7 MB. Max. memory is 11.5 GB. * Witness Printer took 35.31 ms. Allocated memory is still 1.1 GB. Free memory was 971.0 MB in the beginning and 964.1 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Result: UNSAFE, OverallTime: 3.2s, OverallIterations: 10, TraceHistogramMax: 10, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 56 SDtfs, 71 SDslu, 141 SDs, 0 SdLazy, 487 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 229 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=9, 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, 9 MinimizatonAttempts, 8 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 349 NumberOfCodeBlocks, 349 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 298 ConstructedInterpolants, 0 QuantifiedInterpolants, 21242 SizeOfPredicates, 15 NumberOfNonLiveVariables, 336 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 135/756 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...