./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_10x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_10x0-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/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 b1d9bbb15ebabc8fa7bed11dd5ef1fc8e11e37bc ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-19 22:48:48,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 22:48:48,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 22:48:48,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 22:48:48,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 22:48:48,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 22:48:48,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 22:48:48,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 22:48:48,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 22:48:48,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 22:48:48,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 22:48:48,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 22:48:48,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 22:48:48,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 22:48:48,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 22:48:48,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 22:48:48,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 22:48:48,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 22:48:48,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 22:48:48,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 22:48:48,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 22:48:48,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 22:48:48,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 22:48:48,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 22:48:48,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 22:48:48,766 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 22:48:48,767 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 22:48:48,768 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 22:48:48,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 22:48:48,770 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 22:48:48,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 22:48:48,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 22:48:48,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 22:48:48,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 22:48:48,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 22:48:48,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 22:48:48,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 22:48:48,780 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 22:48:48,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 22:48:48,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 22:48:48,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 22:48:48,787 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 22:48:48,813 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 22:48:48,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 22:48:48,815 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 22:48:48,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 22:48:48,815 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 22:48:48,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 22:48:48,816 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 22:48:48,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 22:48:48,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 22:48:48,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 22:48:48,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 22:48:48,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 22:48:48,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 22:48:48,818 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 22:48:48,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 22:48:48,819 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 22:48:48,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 22:48:48,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 22:48:48,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 22:48:48,820 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 22:48:48,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 22:48:48,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 22:48:48,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 22:48:48,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 22:48:48,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 22:48:48,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 22:48:48,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 22:48:48,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 22:48:48,822 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_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/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 -> b1d9bbb15ebabc8fa7bed11dd5ef1fc8e11e37bc [2019-11-19 22:48:48,998 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 22:48:49,014 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 22:48:49,020 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 22:48:49,021 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 22:48:49,022 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 22:48:49,023 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_10x0-1.c [2019-11-19 22:48:49,092 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/bin/uautomizer/data/6072247d0/70534024847f461e8d7c9cc38e04721c/FLAG43bfedabf [2019-11-19 22:48:49,505 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 22:48:49,505 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/sv-benchmarks/c/recursive-simple/sum_10x0-1.c [2019-11-19 22:48:49,511 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/bin/uautomizer/data/6072247d0/70534024847f461e8d7c9cc38e04721c/FLAG43bfedabf [2019-11-19 22:48:49,867 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/bin/uautomizer/data/6072247d0/70534024847f461e8d7c9cc38e04721c [2019-11-19 22:48:49,871 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 22:48:49,872 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 22:48:49,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 22:48:49,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 22:48:49,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 22:48:49,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:48:49" (1/1) ... [2019-11-19 22:48:49,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@914c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:48:49, skipping insertion in model container [2019-11-19 22:48:49,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:48:49" (1/1) ... [2019-11-19 22:48:49,891 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 22:48:49,912 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 22:48:50,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:48:50,146 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 22:48:50,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:48:50,255 INFO L192 MainTranslator]: Completed translation [2019-11-19 22:48:50,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:48:50 WrapperNode [2019-11-19 22:48:50,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 22:48:50,258 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 22:48:50,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 22:48:50,259 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 22:48:50,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:48:50" (1/1) ... [2019-11-19 22:48:50,272 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:48:50" (1/1) ... [2019-11-19 22:48:50,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 22:48:50,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 22:48:50,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 22:48:50,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 22:48:50,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:48:50" (1/1) ... [2019-11-19 22:48:50,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:48:50" (1/1) ... [2019-11-19 22:48:50,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:48:50" (1/1) ... [2019-11-19 22:48:50,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:48:50" (1/1) ... [2019-11-19 22:48:50,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:48:50" (1/1) ... [2019-11-19 22:48:50,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:48:50" (1/1) ... [2019-11-19 22:48:50,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:48:50" (1/1) ... [2019-11-19 22:48:50,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 22:48:50,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 22:48:50,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 22:48:50,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 22:48:50,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:48:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/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 [2019-11-19 22:48:50,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 22:48:50,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 22:48:50,373 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-19 22:48:50,373 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-19 22:48:50,535 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 22:48:50,535 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-19 22:48:50,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:48:50 BoogieIcfgContainer [2019-11-19 22:48:50,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 22:48:50,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 22:48:50,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 22:48:50,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 22:48:50,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 10:48:49" (1/3) ... [2019-11-19 22:48:50,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b8d40ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:48:50, skipping insertion in model container [2019-11-19 22:48:50,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:48:50" (2/3) ... [2019-11-19 22:48:50,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b8d40ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:48:50, skipping insertion in model container [2019-11-19 22:48:50,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:48:50" (3/3) ... [2019-11-19 22:48:50,543 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2019-11-19 22:48:50,550 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 22:48:50,556 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 22:48:50,565 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 22:48:50,590 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 22:48:50,590 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 22:48:50,590 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 22:48:50,590 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 22:48:50,590 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 22:48:50,591 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 22:48:50,591 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 22:48:50,591 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 22:48:50,608 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-19 22:48:50,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-19 22:48:50,614 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:48:50,615 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:48:50,615 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:48:50,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:48:50,622 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-19 22:48:50,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:48:50,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475628208] [2019-11-19 22:48:50,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:48:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:48:50,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475628208] [2019-11-19 22:48:50,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:48:50,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-19 22:48:50,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257887566] [2019-11-19 22:48:50,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 22:48:50,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:48:50,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 22:48:50,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-19 22:48:50,839 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-11-19 22:48:50,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:48:50,952 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-19 22:48:50,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 22:48:50,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-19 22:48:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:48:50,965 INFO L225 Difference]: With dead ends: 24 [2019-11-19 22:48:50,966 INFO L226 Difference]: Without dead ends: 14 [2019-11-19 22:48:50,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-19 22:48:50,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-19 22:48:51,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-19 22:48:51,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-19 22:48:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-19 22:48:51,009 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-19 22:48:51,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:48:51,010 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-19 22:48:51,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 22:48:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-19 22:48:51,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-19 22:48:51,012 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:48:51,012 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:48:51,012 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:48:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:48:51,013 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-19 22:48:51,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:48:51,013 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663994966] [2019-11-19 22:48:51,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:48:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-19 22:48:51,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663994966] [2019-11-19 22:48:51,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674800731] [2019-11-19 22:48:51,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/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 [2019-11-19 22:48:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:51,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 22:48:51,251 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:48:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-19 22:48:51,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:48:51,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-19 22:48:51,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213542453] [2019-11-19 22:48:51,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 22:48:51,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:48:51,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 22:48:51,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-19 22:48:51,321 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2019-11-19 22:48:51,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:48:51,411 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-19 22:48:51,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 22:48:51,412 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-19 22:48:51,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:48:51,413 INFO L225 Difference]: With dead ends: 21 [2019-11-19 22:48:51,414 INFO L226 Difference]: Without dead ends: 17 [2019-11-19 22:48:51,415 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-19 22:48:51,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-19 22:48:51,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-19 22:48:51,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-19 22:48:51,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-19 22:48:51,421 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-19 22:48:51,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:48:51,421 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-19 22:48:51,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 22:48:51,422 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-19 22:48:51,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-19 22:48:51,423 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:48:51,423 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:48:51,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:48:51,637 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:48:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:48:51,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-19 22:48:51,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:48:51,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320233201] [2019-11-19 22:48:51,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:48:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-19 22:48:51,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320233201] [2019-11-19 22:48:51,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478222054] [2019-11-19 22:48:51,841 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/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 [2019-11-19 22:48:51,904 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 22:48:51,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:48:51,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-19 22:48:51,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:48:51,935 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-19 22:48:51,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:48:51,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-19 22:48:51,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9582020] [2019-11-19 22:48:51,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 22:48:51,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:48:51,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 22:48:51,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-19 22:48:51,945 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 8 states. [2019-11-19 22:48:52,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:48:52,036 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-19 22:48:52,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 22:48:52,037 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-19 22:48:52,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:48:52,038 INFO L225 Difference]: With dead ends: 24 [2019-11-19 22:48:52,038 INFO L226 Difference]: Without dead ends: 20 [2019-11-19 22:48:52,039 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-19 22:48:52,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-19 22:48:52,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-19 22:48:52,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-19 22:48:52,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-19 22:48:52,050 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-19 22:48:52,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:48:52,051 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-19 22:48:52,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 22:48:52,052 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-19 22:48:52,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-19 22:48:52,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:48:52,055 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:48:52,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:48:52,267 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:48:52,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:48:52,268 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-19 22:48:52,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:48:52,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135739542] [2019-11-19 22:48:52,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:48:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-19 22:48:52,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135739542] [2019-11-19 22:48:52,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550210889] [2019-11-19 22:48:52,469 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/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 [2019-11-19 22:48:52,519 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-19 22:48:52,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:48:52,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-19 22:48:52,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:48:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-19 22:48:52,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:48:52,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-19 22:48:52,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982730527] [2019-11-19 22:48:52,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-19 22:48:52,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:48:52,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-19 22:48:52,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-19 22:48:52,548 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2019-11-19 22:48:52,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:48:52,644 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-19 22:48:52,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 22:48:52,645 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-11-19 22:48:52,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:48:52,646 INFO L225 Difference]: With dead ends: 27 [2019-11-19 22:48:52,647 INFO L226 Difference]: Without dead ends: 23 [2019-11-19 22:48:52,647 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-11-19 22:48:52,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-19 22:48:52,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-19 22:48:52,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-19 22:48:52,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-19 22:48:52,654 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-19 22:48:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:48:52,655 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-19 22:48:52,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-19 22:48:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-19 22:48:52,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-19 22:48:52,657 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:48:52,657 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:48:52,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:48:52,860 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:48:52,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:48:52,861 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-19 22:48:52,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:48:52,861 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237947649] [2019-11-19 22:48:52,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:48:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-19 22:48:53,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237947649] [2019-11-19 22:48:53,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65566466] [2019-11-19 22:48:53,091 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/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 [2019-11-19 22:48:53,128 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 22:48:53,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:48:53,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-19 22:48:53,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:48:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-19 22:48:53,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:48:53,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-19 22:48:53,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348488781] [2019-11-19 22:48:53,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 22:48:53,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:48:53,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 22:48:53,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-19 22:48:53,172 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-11-19 22:48:53,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:48:53,286 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-19 22:48:53,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-19 22:48:53,286 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2019-11-19 22:48:53,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:48:53,288 INFO L225 Difference]: With dead ends: 30 [2019-11-19 22:48:53,288 INFO L226 Difference]: Without dead ends: 26 [2019-11-19 22:48:53,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-11-19 22:48:53,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-19 22:48:53,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-19 22:48:53,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-19 22:48:53,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-19 22:48:53,296 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-19 22:48:53,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:48:53,297 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-19 22:48:53,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 22:48:53,297 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-19 22:48:53,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-19 22:48:53,299 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:48:53,299 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:48:53,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:48:53,503 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:48:53,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:48:53,503 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-19 22:48:53,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:48:53,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284574599] [2019-11-19 22:48:53,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:48:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-19 22:48:53,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284574599] [2019-11-19 22:48:53,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336434359] [2019-11-19 22:48:53,782 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/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 [2019-11-19 22:48:53,845 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-19 22:48:53,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:48:53,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-19 22:48:53,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:48:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-19 22:48:53,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:48:53,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-19 22:48:53,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807466591] [2019-11-19 22:48:53,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-19 22:48:53,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:48:53,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-19 22:48:53,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-19 22:48:53,914 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-11-19 22:48:54,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:48:54,053 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-19 22:48:54,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 22:48:54,054 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2019-11-19 22:48:54,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:48:54,056 INFO L225 Difference]: With dead ends: 33 [2019-11-19 22:48:54,056 INFO L226 Difference]: Without dead ends: 29 [2019-11-19 22:48:54,057 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-11-19 22:48:54,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-19 22:48:54,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-19 22:48:54,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-19 22:48:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-19 22:48:54,064 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-19 22:48:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:48:54,065 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-19 22:48:54,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-19 22:48:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-19 22:48:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-19 22:48:54,067 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:48:54,067 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:48:54,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:48:54,271 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:48:54,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:48:54,271 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-19 22:48:54,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:48:54,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122117647] [2019-11-19 22:48:54,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:48:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-19 22:48:54,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122117647] [2019-11-19 22:48:54,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175509213] [2019-11-19 22:48:54,586 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/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 [2019-11-19 22:48:54,645 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-19 22:48:54,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:48:54,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-19 22:48:54,649 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:48:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-19 22:48:54,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:48:54,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-19 22:48:54,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800531468] [2019-11-19 22:48:54,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-19 22:48:54,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:48:54,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-19 22:48:54,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-19 22:48:54,690 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2019-11-19 22:48:54,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:48:54,832 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-19 22:48:54,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-19 22:48:54,833 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2019-11-19 22:48:54,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:48:54,834 INFO L225 Difference]: With dead ends: 36 [2019-11-19 22:48:54,834 INFO L226 Difference]: Without dead ends: 32 [2019-11-19 22:48:54,835 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2019-11-19 22:48:54,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-19 22:48:54,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-19 22:48:54,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-19 22:48:54,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-19 22:48:54,840 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-19 22:48:54,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:48:54,840 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-19 22:48:54,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-19 22:48:54,841 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-19 22:48:54,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-19 22:48:54,842 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:48:54,842 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:48:55,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:48:55,043 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:48:55,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:48:55,044 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-19 22:48:55,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:48:55,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860410578] [2019-11-19 22:48:55,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:48:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-19 22:48:55,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860410578] [2019-11-19 22:48:55,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027045213] [2019-11-19 22:48:55,240 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/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 [2019-11-19 22:48:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-19 22:48:55,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:48:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-19 22:48:55,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:48:55,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-19 22:48:55,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727179553] [2019-11-19 22:48:55,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-19 22:48:55,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:48:55,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-19 22:48:55,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-19 22:48:55,324 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 13 states. [2019-11-19 22:48:55,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:48:55,472 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-19 22:48:55,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-19 22:48:55,473 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-11-19 22:48:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:48:55,475 INFO L225 Difference]: With dead ends: 39 [2019-11-19 22:48:55,475 INFO L226 Difference]: Without dead ends: 35 [2019-11-19 22:48:55,476 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2019-11-19 22:48:55,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-19 22:48:55,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-19 22:48:55,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-19 22:48:55,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-19 22:48:55,483 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-19 22:48:55,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:48:55,483 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-19 22:48:55,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-19 22:48:55,484 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-19 22:48:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-19 22:48:55,487 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:48:55,487 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:48:55,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:48:55,690 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:48:55,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:48:55,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-19 22:48:55,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:48:55,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486452111] [2019-11-19 22:48:55,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:48:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-19 22:48:55,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486452111] [2019-11-19 22:48:55,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123411426] [2019-11-19 22:48:55,904 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/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 [2019-11-19 22:48:55,945 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 22:48:55,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:48:55,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-19 22:48:55,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:48:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-19 22:48:55,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:48:55,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-19 22:48:55,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893746671] [2019-11-19 22:48:55,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-19 22:48:55,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:48:55,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-19 22:48:55,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-11-19 22:48:55,991 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2019-11-19 22:48:56,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:48:56,136 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-19 22:48:56,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-19 22:48:56,137 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2019-11-19 22:48:56,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:48:56,138 INFO L225 Difference]: With dead ends: 42 [2019-11-19 22:48:56,138 INFO L226 Difference]: Without dead ends: 38 [2019-11-19 22:48:56,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2019-11-19 22:48:56,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-19 22:48:56,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-19 22:48:56,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-19 22:48:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-19 22:48:56,149 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-19 22:48:56,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:48:56,150 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-19 22:48:56,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-19 22:48:56,150 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-19 22:48:56,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-19 22:48:56,152 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:48:56,152 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:48:56,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:48:56,353 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:48:56,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:48:56,354 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-19 22:48:56,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:48:56,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036602084] [2019-11-19 22:48:56,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:48:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-19 22:48:56,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036602084] [2019-11-19 22:48:56,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876512504] [2019-11-19 22:48:56,631 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/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 [2019-11-19 22:48:56,680 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-19 22:48:56,681 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:48:56,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-19 22:48:56,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:48:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-19 22:48:56,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:48:56,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-19 22:48:56,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779128242] [2019-11-19 22:48:56,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-19 22:48:56,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:48:56,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-19 22:48:56,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-11-19 22:48:56,731 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 15 states. [2019-11-19 22:48:56,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:48:56,873 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-19 22:48:56,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-19 22:48:56,873 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-11-19 22:48:56,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:48:56,874 INFO L225 Difference]: With dead ends: 45 [2019-11-19 22:48:56,874 INFO L226 Difference]: Without dead ends: 41 [2019-11-19 22:48:56,875 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2019-11-19 22:48:56,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-19 22:48:56,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-19 22:48:56,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-19 22:48:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-19 22:48:56,883 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-19 22:48:56,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:48:56,883 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-19 22:48:56,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-19 22:48:56,883 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-19 22:48:56,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-19 22:48:56,885 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:48:56,886 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:48:57,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:48:57,086 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:48:57,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:48:57,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-19 22:48:57,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:48:57,087 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570614931] [2019-11-19 22:48:57,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:48:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:48:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 144 proven. 20 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-19 22:48:58,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570614931] [2019-11-19 22:48:58,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301099620] [2019-11-19 22:48:58,029 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:48:58,080 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 22:48:58,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:48:58,084 WARN L253 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 135 conjunts are in the unsatisfiable core [2019-11-19 22:48:58,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:48:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2019-11-19 22:48:58,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:48:58,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [28] total 30 [2019-11-19 22:48:58,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035222053] [2019-11-19 22:48:58,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 22:48:58,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:48:58,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 22:48:58,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2019-11-19 22:48:58,181 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 7 states. [2019-11-19 22:48:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:48:58,297 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2019-11-19 22:48:58,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 22:48:58,298 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2019-11-19 22:48:58,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:48:58,298 INFO L225 Difference]: With dead ends: 41 [2019-11-19 22:48:58,298 INFO L226 Difference]: Without dead ends: 0 [2019-11-19 22:48:58,300 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2019-11-19 22:48:58,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-19 22:48:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-19 22:48:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-19 22:48:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-19 22:48:58,300 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2019-11-19 22:48:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:48:58,301 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-19 22:48:58,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 22:48:58,301 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-19 22:48:58,301 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-19 22:48:58,501 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:48:58,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-19 22:48:58,529 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-19 22:48:58,530 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-19 22:48:58,530 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-19 22:48:58,530 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2019-11-19 22:48:58,530 INFO L444 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2019-11-19 22:48:58,530 INFO L444 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-11-19 22:48:58,530 INFO L440 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (<= 10 ULTIMATE.start_main_~a~0) [2019-11-19 22:48:58,530 INFO L444 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2019-11-19 22:48:58,530 INFO L444 ceAbstractionStarter]: For program point L11(lines 11 18) no Hoare annotation was computed. [2019-11-19 22:48:58,530 INFO L444 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2019-11-19 22:48:58,531 INFO L440 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|)) [2019-11-19 22:48:58,531 INFO L444 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2019-11-19 22:48:58,531 INFO L444 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2019-11-19 22:48:58,531 INFO L444 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2019-11-19 22:48:58,531 INFO L447 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2019-11-19 22:48:58,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 10:48:58 BoogieIcfgContainer [2019-11-19 22:48:58,534 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 22:48:58,534 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 22:48:58,534 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 22:48:58,535 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 22:48:58,535 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:48:50" (3/4) ... [2019-11-19 22:48:58,537 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-19 22:48:58,542 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2019-11-19 22:48:58,545 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-19 22:48:58,545 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-19 22:48:58,581 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2aa5d394-7341-4b87-a7d3-551d2fdd19b5/bin/uautomizer/witness.graphml [2019-11-19 22:48:58,582 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 22:48:58,583 INFO L168 Benchmark]: Toolchain (without parser) took 8711.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.0 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -210.7 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:48:58,584 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:48:58,584 INFO L168 Benchmark]: CACSL2BoogieTranslator took 383.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.4 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -173.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-19 22:48:58,585 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:48:58,585 INFO L168 Benchmark]: Boogie Preprocessor took 18.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:48:58,585 INFO L168 Benchmark]: RCFGBuilder took 227.27 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: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2019-11-19 22:48:58,586 INFO L168 Benchmark]: TraceAbstraction took 7996.80 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 45.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -65.9 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:48:58,586 INFO L168 Benchmark]: Witness Printer took 47.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 11.5 GB. [2019-11-19 22:48:58,589 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 383.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.4 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -173.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 227.27 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: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7996.80 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 45.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -65.9 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 47.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: SAFE, OverallTime: 7.9s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 87 SDtfs, 184 SDslu, 272 SDs, 0 SdLazy, 369 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 700 GetRequests, 529 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.3s 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, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 849 NumberOfCodeBlocks, 844 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 828 ConstructedInterpolants, 0 QuantifiedInterpolants, 137084 SizeOfPredicates, 88 NumberOfNonLiveVariables, 1250 ConjunctsInSsa, 261 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 1500/2420 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 correct! Received shutdown request...