./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_20x0-2.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_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/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 f4078ef7bc39da0337b6d8ed5ecbbcec336a37b8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 00:57:33,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 00:57:33,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 00:57:33,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 00:57:33,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 00:57:33,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 00:57:33,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 00:57:33,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 00:57:33,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 00:57:33,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 00:57:33,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 00:57:33,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 00:57:33,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 00:57:33,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 00:57:33,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 00:57:33,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 00:57:33,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 00:57:33,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 00:57:33,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 00:57:33,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 00:57:33,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 00:57:33,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 00:57:33,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 00:57:33,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 00:57:33,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 00:57:33,943 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 00:57:33,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 00:57:33,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 00:57:33,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 00:57:33,946 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 00:57:33,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 00:57:33,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 00:57:33,947 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 00:57:33,948 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 00:57:33,949 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 00:57:33,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 00:57:33,949 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 00:57:33,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 00:57:33,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 00:57:33,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 00:57:33,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 00:57:33,952 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 00:57:33,975 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 00:57:33,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 00:57:33,976 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 00:57:33,976 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 00:57:33,976 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 00:57:33,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 00:57:33,977 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 00:57:33,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 00:57:33,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 00:57:33,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 00:57:33,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 00:57:33,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 00:57:33,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 00:57:33,978 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 00:57:33,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 00:57:33,978 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 00:57:33,979 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 00:57:33,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 00:57:33,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 00:57:33,979 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 00:57:33,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 00:57:33,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 00:57:33,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 00:57:33,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 00:57:33,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 00:57:33,980 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 00:57:33,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 00:57:33,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 00:57:33,990 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_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/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 -> f4078ef7bc39da0337b6d8ed5ecbbcec336a37b8 [2019-11-20 00:57:34,157 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 00:57:34,169 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 00:57:34,172 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 00:57:34,173 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 00:57:34,173 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 00:57:34,174 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2019-11-20 00:57:34,224 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/data/51167503a/05bb3e238d30442f86f9aefe8fed967a/FLAGeca36943e [2019-11-20 00:57:34,619 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 00:57:34,619 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2019-11-20 00:57:34,623 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/data/51167503a/05bb3e238d30442f86f9aefe8fed967a/FLAGeca36943e [2019-11-20 00:57:34,635 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/data/51167503a/05bb3e238d30442f86f9aefe8fed967a [2019-11-20 00:57:34,637 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 00:57:34,639 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 00:57:34,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 00:57:34,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 00:57:34,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 00:57:34,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:57:34" (1/1) ... [2019-11-20 00:57:34,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37d0ded4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:57:34, skipping insertion in model container [2019-11-20 00:57:34,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:57:34" (1/1) ... [2019-11-20 00:57:34,655 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 00:57:34,665 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 00:57:34,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 00:57:34,800 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 00:57:34,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 00:57:34,880 INFO L192 MainTranslator]: Completed translation [2019-11-20 00:57:34,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:57:34 WrapperNode [2019-11-20 00:57:34,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 00:57:34,882 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 00:57:34,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 00:57:34,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 00:57:34,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:57:34" (1/1) ... [2019-11-20 00:57:34,894 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:57:34" (1/1) ... [2019-11-20 00:57:34,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 00:57:34,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 00:57:34,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 00:57:34,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 00:57:34,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:57:34" (1/1) ... [2019-11-20 00:57:34,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:57:34" (1/1) ... [2019-11-20 00:57:34,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:57:34" (1/1) ... [2019-11-20 00:57:34,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:57:34" (1/1) ... [2019-11-20 00:57:34,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:57:34" (1/1) ... [2019-11-20 00:57:34,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:57:34" (1/1) ... [2019-11-20 00:57:34,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:57:34" (1/1) ... [2019-11-20 00:57:34,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 00:57:34,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 00:57:34,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 00:57:34,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 00:57:34,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:57:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/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 [2019-11-20 00:57:34,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 00:57:34,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 00:57:34,982 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-20 00:57:34,982 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-20 00:57:35,118 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 00:57:35,118 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 00:57:35,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:57:35 BoogieIcfgContainer [2019-11-20 00:57:35,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 00:57:35,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 00:57:35,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 00:57:35,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 00:57:35,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:57:34" (1/3) ... [2019-11-20 00:57:35,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c201bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:57:35, skipping insertion in model container [2019-11-20 00:57:35,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:57:34" (2/3) ... [2019-11-20 00:57:35,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c201bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:57:35, skipping insertion in model container [2019-11-20 00:57:35,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:57:35" (3/3) ... [2019-11-20 00:57:35,126 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2019-11-20 00:57:35,134 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 00:57:35,139 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 00:57:35,149 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 00:57:35,173 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 00:57:35,173 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 00:57:35,173 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 00:57:35,173 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 00:57:35,173 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 00:57:35,173 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 00:57:35,174 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 00:57:35,174 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 00:57:35,186 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-20 00:57:35,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 00:57:35,190 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:35,191 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:35,191 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:35,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:35,196 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-20 00:57:35,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:35,203 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277804668] [2019-11-20 00:57:35,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:57:35,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277804668] [2019-11-20 00:57:35,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:57:35,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 00:57:35,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806149524] [2019-11-20 00:57:35,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 00:57:35,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:35,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 00:57:35,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 00:57:35,402 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-11-20 00:57:35,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:35,515 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-20 00:57:35,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 00:57:35,517 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-20 00:57:35,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:35,524 INFO L225 Difference]: With dead ends: 24 [2019-11-20 00:57:35,524 INFO L226 Difference]: Without dead ends: 14 [2019-11-20 00:57:35,526 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 [2019-11-20 00:57:35,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-20 00:57:35,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-20 00:57:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-20 00:57:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-20 00:57:35,556 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-20 00:57:35,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:35,556 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-20 00:57:35,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 00:57:35,556 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-20 00:57:35,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 00:57:35,558 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:35,558 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:35,558 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:35,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:35,559 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-20 00:57:35,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:35,559 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865652501] [2019-11-20 00:57:35,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 00:57:35,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865652501] [2019-11-20 00:57:35,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506904401] [2019-11-20 00:57:35,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/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 [2019-11-20 00:57:35,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:35,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 00:57:35,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 00:57:35,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:35,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-20 00:57:35,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457704209] [2019-11-20 00:57:35,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 00:57:35,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:35,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 00:57:35,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-20 00:57:35,777 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2019-11-20 00:57:35,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:35,835 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-20 00:57:35,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 00:57:35,836 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-20 00:57:35,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:35,837 INFO L225 Difference]: With dead ends: 21 [2019-11-20 00:57:35,837 INFO L226 Difference]: Without dead ends: 17 [2019-11-20 00:57:35,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-20 00:57:35,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-20 00:57:35,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-20 00:57:35,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-20 00:57:35,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-20 00:57:35,843 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-20 00:57:35,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:35,844 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-20 00:57:35,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 00:57:35,844 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-20 00:57:35,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 00:57:35,845 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:35,845 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:36,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:36,049 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:36,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:36,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-20 00:57:36,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:36,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303781751] [2019-11-20 00:57:36,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 00:57:36,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303781751] [2019-11-20 00:57:36,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472006610] [2019-11-20 00:57:36,217 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/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 [2019-11-20 00:57:36,250 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 00:57:36,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:57:36,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 00:57:36,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 00:57:36,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:36,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-20 00:57:36,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731520751] [2019-11-20 00:57:36,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 00:57:36,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:36,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 00:57:36,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-20 00:57:36,284 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 8 states. [2019-11-20 00:57:36,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:36,365 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-20 00:57:36,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 00:57:36,365 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-20 00:57:36,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:36,366 INFO L225 Difference]: With dead ends: 24 [2019-11-20 00:57:36,367 INFO L226 Difference]: Without dead ends: 20 [2019-11-20 00:57:36,367 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 [2019-11-20 00:57:36,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-20 00:57:36,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-20 00:57:36,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-20 00:57:36,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-20 00:57:36,373 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-20 00:57:36,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:36,373 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-20 00:57:36,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 00:57:36,374 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-20 00:57:36,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 00:57:36,375 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:36,375 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:36,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:36,576 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:36,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:36,576 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-20 00:57:36,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:36,577 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694316947] [2019-11-20 00:57:36,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-20 00:57:36,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694316947] [2019-11-20 00:57:36,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173856732] [2019-11-20 00:57:36,766 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/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 [2019-11-20 00:57:36,820 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-20 00:57:36,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:57:36,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 00:57:36,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-20 00:57:36,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:36,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-20 00:57:36,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5508408] [2019-11-20 00:57:36,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 00:57:36,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:36,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 00:57:36,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-20 00:57:36,859 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2019-11-20 00:57:36,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:36,963 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-20 00:57:36,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 00:57:36,964 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-11-20 00:57:36,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:36,965 INFO L225 Difference]: With dead ends: 27 [2019-11-20 00:57:36,965 INFO L226 Difference]: Without dead ends: 23 [2019-11-20 00:57:36,966 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 [2019-11-20 00:57:36,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-20 00:57:36,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-20 00:57:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-20 00:57:36,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-20 00:57:36,974 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-20 00:57:36,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:36,976 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-20 00:57:36,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 00:57:36,976 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-20 00:57:36,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-20 00:57:36,980 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:36,980 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:37,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:37,188 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:37,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:37,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-20 00:57:37,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:37,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949745043] [2019-11-20 00:57:37,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-20 00:57:37,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949745043] [2019-11-20 00:57:37,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628935556] [2019-11-20 00:57:37,376 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/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 [2019-11-20 00:57:37,414 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 00:57:37,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:57:37,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 00:57:37,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-20 00:57:37,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:37,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-20 00:57:37,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23293728] [2019-11-20 00:57:37,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 00:57:37,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:37,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 00:57:37,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-20 00:57:37,460 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-11-20 00:57:37,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:37,553 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-20 00:57:37,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 00:57:37,554 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2019-11-20 00:57:37,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:37,555 INFO L225 Difference]: With dead ends: 30 [2019-11-20 00:57:37,556 INFO L226 Difference]: Without dead ends: 26 [2019-11-20 00:57:37,556 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 [2019-11-20 00:57:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-20 00:57:37,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-20 00:57:37,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 00:57:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-20 00:57:37,566 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-20 00:57:37,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:37,566 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-20 00:57:37,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 00:57:37,567 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-20 00:57:37,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-20 00:57:37,569 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:37,569 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:37,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:37,778 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:37,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:37,779 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-20 00:57:37,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:37,779 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708363761] [2019-11-20 00:57:37,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-20 00:57:37,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708363761] [2019-11-20 00:57:37,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442869849] [2019-11-20 00:57:37,993 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/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 [2019-11-20 00:57:38,044 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-20 00:57:38,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:57:38,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 00:57:38,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-20 00:57:38,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:38,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-20 00:57:38,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205263092] [2019-11-20 00:57:38,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 00:57:38,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:38,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 00:57:38,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-20 00:57:38,089 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-11-20 00:57:38,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:38,198 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-20 00:57:38,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 00:57:38,199 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2019-11-20 00:57:38,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:38,200 INFO L225 Difference]: With dead ends: 33 [2019-11-20 00:57:38,200 INFO L226 Difference]: Without dead ends: 29 [2019-11-20 00:57:38,201 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-11-20 00:57:38,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-20 00:57:38,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-20 00:57:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-20 00:57:38,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-20 00:57:38,206 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-20 00:57:38,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:38,207 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-20 00:57:38,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 00:57:38,207 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-20 00:57:38,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-20 00:57:38,208 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:38,208 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:38,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:38,409 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:38,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:38,409 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-20 00:57:38,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:38,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000871983] [2019-11-20 00:57:38,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-20 00:57:38,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000871983] [2019-11-20 00:57:38,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066040212] [2019-11-20 00:57:38,621 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/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 [2019-11-20 00:57:38,670 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-20 00:57:38,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:57:38,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 00:57:38,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-20 00:57:38,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:38,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-20 00:57:38,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763767267] [2019-11-20 00:57:38,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 00:57:38,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:38,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 00:57:38,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-20 00:57:38,705 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2019-11-20 00:57:38,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:38,814 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-20 00:57:38,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 00:57:38,814 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2019-11-20 00:57:38,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:38,815 INFO L225 Difference]: With dead ends: 36 [2019-11-20 00:57:38,816 INFO L226 Difference]: Without dead ends: 32 [2019-11-20 00:57:38,816 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 [2019-11-20 00:57:38,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-20 00:57:38,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-20 00:57:38,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-20 00:57:38,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-20 00:57:38,821 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-20 00:57:38,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:38,821 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-20 00:57:38,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 00:57:38,822 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-20 00:57:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-20 00:57:38,823 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:38,823 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:39,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:39,028 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:39,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:39,029 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-20 00:57:39,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:39,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498883251] [2019-11-20 00:57:39,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-20 00:57:39,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498883251] [2019-11-20 00:57:39,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620015135] [2019-11-20 00:57:39,237 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/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 [2019-11-20 00:57:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 00:57:39,288 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-20 00:57:39,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:39,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-20 00:57:39,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895567841] [2019-11-20 00:57:39,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 00:57:39,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:39,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 00:57:39,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-20 00:57:39,323 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 13 states. [2019-11-20 00:57:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:39,472 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-20 00:57:39,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 00:57:39,472 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-11-20 00:57:39,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:39,473 INFO L225 Difference]: With dead ends: 39 [2019-11-20 00:57:39,473 INFO L226 Difference]: Without dead ends: 35 [2019-11-20 00:57:39,474 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 [2019-11-20 00:57:39,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-20 00:57:39,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-20 00:57:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-20 00:57:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-20 00:57:39,479 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-20 00:57:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:39,479 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-20 00:57:39,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 00:57:39,480 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-20 00:57:39,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-20 00:57:39,481 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:39,481 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:39,688 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:39,689 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:39,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:39,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-20 00:57:39,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:39,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483948773] [2019-11-20 00:57:39,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-20 00:57:39,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483948773] [2019-11-20 00:57:39,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223015596] [2019-11-20 00:57:39,931 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/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 [2019-11-20 00:57:39,984 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 00:57:39,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:57:39,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 00:57:39,992 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-20 00:57:40,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:40,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-20 00:57:40,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061194777] [2019-11-20 00:57:40,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 00:57:40,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:40,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 00:57:40,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-11-20 00:57:40,045 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2019-11-20 00:57:40,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:40,204 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-20 00:57:40,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 00:57:40,204 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2019-11-20 00:57:40,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:40,206 INFO L225 Difference]: With dead ends: 42 [2019-11-20 00:57:40,206 INFO L226 Difference]: Without dead ends: 38 [2019-11-20 00:57:40,207 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2019-11-20 00:57:40,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-20 00:57:40,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-20 00:57:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-20 00:57:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-20 00:57:40,215 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-20 00:57:40,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:40,215 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-20 00:57:40,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 00:57:40,216 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-20 00:57:40,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-20 00:57:40,221 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:40,221 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:40,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:40,425 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:40,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-20 00:57:40,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:40,426 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319395243] [2019-11-20 00:57:40,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-20 00:57:40,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319395243] [2019-11-20 00:57:40,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461314244] [2019-11-20 00:57:40,739 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/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 [2019-11-20 00:57:40,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-20 00:57:40,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:57:40,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 00:57:40,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-20 00:57:40,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:40,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-20 00:57:40,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576913333] [2019-11-20 00:57:40,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 00:57:40,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:40,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 00:57:40,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-11-20 00:57:40,853 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 15 states. [2019-11-20 00:57:41,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:41,003 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-20 00:57:41,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 00:57:41,004 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-11-20 00:57:41,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:41,005 INFO L225 Difference]: With dead ends: 45 [2019-11-20 00:57:41,005 INFO L226 Difference]: Without dead ends: 41 [2019-11-20 00:57:41,006 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 [2019-11-20 00:57:41,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-20 00:57:41,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-20 00:57:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-20 00:57:41,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-20 00:57:41,011 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-20 00:57:41,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:41,011 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-20 00:57:41,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 00:57:41,011 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-20 00:57:41,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-20 00:57:41,017 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:41,017 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:41,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:41,224 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:41,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-20 00:57:41,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:41,225 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802593895] [2019-11-20 00:57:41,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-20 00:57:41,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802593895] [2019-11-20 00:57:41,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140400745] [2019-11-20 00:57:41,530 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/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 [2019-11-20 00:57:41,589 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 00:57:41,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:57:41,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 00:57:41,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-20 00:57:41,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:41,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-20 00:57:41,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621092317] [2019-11-20 00:57:41,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 00:57:41,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:41,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 00:57:41,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-11-20 00:57:41,638 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 16 states. [2019-11-20 00:57:41,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:41,810 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-11-20 00:57:41,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 00:57:41,810 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2019-11-20 00:57:41,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:41,812 INFO L225 Difference]: With dead ends: 48 [2019-11-20 00:57:41,812 INFO L226 Difference]: Without dead ends: 44 [2019-11-20 00:57:41,813 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2019-11-20 00:57:41,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-20 00:57:41,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-20 00:57:41,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-20 00:57:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-20 00:57:41,821 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-11-20 00:57:41,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:41,822 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-20 00:57:41,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 00:57:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-20 00:57:41,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-20 00:57:41,824 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:41,824 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:42,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:42,028 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:42,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-11-20 00:57:42,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:42,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925244327] [2019-11-20 00:57:42,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-20 00:57:42,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925244327] [2019-11-20 00:57:42,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270456778] [2019-11-20 00:57:42,404 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:42,468 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-20 00:57:42,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:57:42,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-20 00:57:42,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-20 00:57:42,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:42,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-20 00:57:42,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629281675] [2019-11-20 00:57:42,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 00:57:42,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:42,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 00:57:42,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-11-20 00:57:42,506 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 17 states. [2019-11-20 00:57:42,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:42,690 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-11-20 00:57:42,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 00:57:42,691 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2019-11-20 00:57:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:42,692 INFO L225 Difference]: With dead ends: 51 [2019-11-20 00:57:42,692 INFO L226 Difference]: Without dead ends: 47 [2019-11-20 00:57:42,693 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2019-11-20 00:57:42,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-20 00:57:42,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-20 00:57:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-20 00:57:42,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-11-20 00:57:42,698 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-11-20 00:57:42,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:42,699 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-11-20 00:57:42,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 00:57:42,699 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-11-20 00:57:42,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-20 00:57:42,700 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:42,701 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:42,901 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:42,901 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:42,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:42,901 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-11-20 00:57:42,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:42,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456503738] [2019-11-20 00:57:42,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-20 00:57:43,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456503738] [2019-11-20 00:57:43,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176865403] [2019-11-20 00:57:43,274 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:43,343 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-20 00:57:43,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:57:43,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-20 00:57:43,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-20 00:57:43,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:43,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-20 00:57:43,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062199028] [2019-11-20 00:57:43,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 00:57:43,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:43,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 00:57:43,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2019-11-20 00:57:43,394 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2019-11-20 00:57:43,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:43,585 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-11-20 00:57:43,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 00:57:43,585 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2019-11-20 00:57:43,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:43,586 INFO L225 Difference]: With dead ends: 54 [2019-11-20 00:57:43,586 INFO L226 Difference]: Without dead ends: 50 [2019-11-20 00:57:43,587 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2019-11-20 00:57:43,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-20 00:57:43,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-20 00:57:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-20 00:57:43,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-20 00:57:43,593 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-11-20 00:57:43,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:43,593 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-20 00:57:43,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 00:57:43,593 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-20 00:57:43,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-20 00:57:43,594 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:43,595 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:43,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:43,799 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:43,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:43,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-11-20 00:57:43,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:43,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448328667] [2019-11-20 00:57:43,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-20 00:57:44,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448328667] [2019-11-20 00:57:44,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020516533] [2019-11-20 00:57:44,276 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:44,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-20 00:57:44,341 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-20 00:57:44,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:44,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-20 00:57:44,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210975442] [2019-11-20 00:57:44,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-20 00:57:44,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:44,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-20 00:57:44,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2019-11-20 00:57:44,382 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 19 states. [2019-11-20 00:57:44,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:44,589 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-11-20 00:57:44,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-20 00:57:44,589 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2019-11-20 00:57:44,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:44,590 INFO L225 Difference]: With dead ends: 57 [2019-11-20 00:57:44,590 INFO L226 Difference]: Without dead ends: 53 [2019-11-20 00:57:44,591 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2019-11-20 00:57:44,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-20 00:57:44,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-20 00:57:44,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-20 00:57:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-20 00:57:44,596 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-11-20 00:57:44,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:44,600 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-20 00:57:44,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-20 00:57:44,601 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-20 00:57:44,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-20 00:57:44,603 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:44,603 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:44,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:44,806 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:44,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:44,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-11-20 00:57:44,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:44,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804831128] [2019-11-20 00:57:44,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-20 00:57:45,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804831128] [2019-11-20 00:57:45,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195947433] [2019-11-20 00:57:45,293 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:45,362 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 00:57:45,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:57:45,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-20 00:57:45,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:45,424 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-20 00:57:45,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:45,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-20 00:57:45,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655179596] [2019-11-20 00:57:45,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 00:57:45,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:45,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 00:57:45,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2019-11-20 00:57:45,426 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 20 states. [2019-11-20 00:57:45,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:45,666 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-11-20 00:57:45,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 00:57:45,667 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2019-11-20 00:57:45,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:45,668 INFO L225 Difference]: With dead ends: 60 [2019-11-20 00:57:45,668 INFO L226 Difference]: Without dead ends: 56 [2019-11-20 00:57:45,669 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2019-11-20 00:57:45,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-20 00:57:45,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-20 00:57:45,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-20 00:57:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-11-20 00:57:45,674 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-11-20 00:57:45,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:45,675 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-11-20 00:57:45,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 00:57:45,675 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-11-20 00:57:45,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-20 00:57:45,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:45,676 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:45,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:45,879 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:45,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:45,879 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-11-20 00:57:45,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:45,880 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978455018] [2019-11-20 00:57:45,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-20 00:57:46,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978455018] [2019-11-20 00:57:46,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423638311] [2019-11-20 00:57:46,355 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:46,430 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-20 00:57:46,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:57:46,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-20 00:57:46,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-20 00:57:46,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:46,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-20 00:57:46,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667059367] [2019-11-20 00:57:46,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-20 00:57:46,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:46,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-20 00:57:46,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2019-11-20 00:57:46,483 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 21 states. [2019-11-20 00:57:46,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:46,698 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-11-20 00:57:46,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-20 00:57:46,698 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 99 [2019-11-20 00:57:46,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:46,699 INFO L225 Difference]: With dead ends: 63 [2019-11-20 00:57:46,699 INFO L226 Difference]: Without dead ends: 59 [2019-11-20 00:57:46,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2019-11-20 00:57:46,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-20 00:57:46,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-20 00:57:46,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-20 00:57:46,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-11-20 00:57:46,705 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2019-11-20 00:57:46,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:46,705 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-11-20 00:57:46,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-20 00:57:46,705 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-11-20 00:57:46,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-20 00:57:46,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:46,706 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:46,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:46,911 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:46,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:46,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2019-11-20 00:57:46,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:46,912 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614664017] [2019-11-20 00:57:46,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:47,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-20 00:57:47,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614664017] [2019-11-20 00:57:47,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575575129] [2019-11-20 00:57:47,492 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:47,559 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 00:57:47,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:57:47,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-20 00:57:47,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-20 00:57:47,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:47,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-20 00:57:47,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670220921] [2019-11-20 00:57:47,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-20 00:57:47,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:47,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 00:57:47,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2019-11-20 00:57:47,617 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 22 states. [2019-11-20 00:57:47,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:47,907 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2019-11-20 00:57:47,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 00:57:47,908 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 105 [2019-11-20 00:57:47,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:47,909 INFO L225 Difference]: With dead ends: 66 [2019-11-20 00:57:47,909 INFO L226 Difference]: Without dead ends: 62 [2019-11-20 00:57:47,910 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2019-11-20 00:57:47,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-20 00:57:47,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-20 00:57:47,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-20 00:57:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-11-20 00:57:47,914 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2019-11-20 00:57:47,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:47,915 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-11-20 00:57:47,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-20 00:57:47,915 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-11-20 00:57:47,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-20 00:57:47,918 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:47,918 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:48,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:48,121 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:48,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:48,121 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2019-11-20 00:57:48,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:48,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133355135] [2019-11-20 00:57:48,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-20 00:57:48,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133355135] [2019-11-20 00:57:48,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801417403] [2019-11-20 00:57:48,752 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:48,832 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-20 00:57:48,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:57:48,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-20 00:57:48,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-20 00:57:48,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:48,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-20 00:57:48,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678404620] [2019-11-20 00:57:48,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-20 00:57:48,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:48,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-20 00:57:48,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2019-11-20 00:57:48,882 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 23 states. [2019-11-20 00:57:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:49,156 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-11-20 00:57:49,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-20 00:57:49,156 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2019-11-20 00:57:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:49,157 INFO L225 Difference]: With dead ends: 69 [2019-11-20 00:57:49,157 INFO L226 Difference]: Without dead ends: 65 [2019-11-20 00:57:49,158 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2019-11-20 00:57:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-20 00:57:49,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-11-20 00:57:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-20 00:57:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-11-20 00:57:49,165 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2019-11-20 00:57:49,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:49,165 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-11-20 00:57:49,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-20 00:57:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-11-20 00:57:49,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-20 00:57:49,167 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:49,167 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:49,375 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:49,376 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:49,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:49,376 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2019-11-20 00:57:49,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:49,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835211387] [2019-11-20 00:57:49,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-20 00:57:50,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835211387] [2019-11-20 00:57:50,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365954848] [2019-11-20 00:57:50,048 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:50,109 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-20 00:57:50,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:57:50,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-20 00:57:50,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-20 00:57:50,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:50,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-20 00:57:50,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551742135] [2019-11-20 00:57:50,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-20 00:57:50,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:50,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-20 00:57:50,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2019-11-20 00:57:50,171 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 24 states. [2019-11-20 00:57:50,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:50,440 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2019-11-20 00:57:50,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-20 00:57:50,440 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2019-11-20 00:57:50,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:50,441 INFO L225 Difference]: With dead ends: 72 [2019-11-20 00:57:50,441 INFO L226 Difference]: Without dead ends: 68 [2019-11-20 00:57:50,442 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2019-11-20 00:57:50,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-20 00:57:50,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-11-20 00:57:50,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-20 00:57:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2019-11-20 00:57:50,447 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2019-11-20 00:57:50,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:50,447 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2019-11-20 00:57:50,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-20 00:57:50,447 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2019-11-20 00:57:50,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-20 00:57:50,456 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:50,456 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:50,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:50,659 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:50,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:50,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2019-11-20 00:57:50,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:50,660 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907756556] [2019-11-20 00:57:50,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-20 00:57:51,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907756556] [2019-11-20 00:57:51,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885601168] [2019-11-20 00:57:51,442 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:51,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-20 00:57:51,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-20 00:57:51,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:51,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-20 00:57:51,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891078703] [2019-11-20 00:57:51,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-20 00:57:51,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:51,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-20 00:57:51,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2019-11-20 00:57:51,617 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 25 states. [2019-11-20 00:57:51,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:57:51,909 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2019-11-20 00:57:51,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-20 00:57:51,909 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 123 [2019-11-20 00:57:51,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:57:51,910 INFO L225 Difference]: With dead ends: 75 [2019-11-20 00:57:51,910 INFO L226 Difference]: Without dead ends: 71 [2019-11-20 00:57:51,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2019-11-20 00:57:51,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-20 00:57:51,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-11-20 00:57:51,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-20 00:57:51,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-11-20 00:57:51,916 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2019-11-20 00:57:51,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:57:51,917 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-11-20 00:57:51,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-20 00:57:51,917 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-11-20 00:57:51,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-20 00:57:51,918 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:57:51,919 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:57:52,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:52,119 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:57:52,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:57:52,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2019-11-20 00:57:52,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:57:52,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552691156] [2019-11-20 00:57:52,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:57:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:57:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 589 proven. 40 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2019-11-20 00:57:54,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552691156] [2019-11-20 00:57:54,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381039902] [2019-11-20 00:57:54,610 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:57:54,671 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 00:57:54,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:57:54,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 177 conjunts are in the unsatisfiable core [2019-11-20 00:57:54,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:57:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 39 proven. 610 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2019-11-20 00:57:57,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:57:57,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49] total 94 [2019-11-20 00:57:57,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302414208] [2019-11-20 00:57:57,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-11-20 00:57:57,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:57:57,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-11-20 00:57:57,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=8162, Unknown=0, NotChecked=0, Total=8742 [2019-11-20 00:57:57,531 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 94 states. [2019-11-20 00:58:01,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:58:01,831 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2019-11-20 00:58:01,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-20 00:58:01,831 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 129 [2019-11-20 00:58:01,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:58:01,832 INFO L225 Difference]: With dead ends: 74 [2019-11-20 00:58:01,832 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 00:58:01,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3521 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1382, Invalid=17250, Unknown=0, NotChecked=0, Total=18632 [2019-11-20 00:58:01,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 00:58:01,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 00:58:01,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 00:58:01,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 00:58:01,838 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 129 [2019-11-20 00:58:01,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:58:01,839 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 00:58:01,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-11-20 00:58:01,839 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 00:58:01,839 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 00:58:02,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:58:02,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 00:58:02,071 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 00:58:02,071 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 00:58:02,071 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 00:58:02,071 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2019-11-20 00:58:02,071 INFO L444 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2019-11-20 00:58:02,071 INFO L444 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-11-20 00:58:02,071 INFO L440 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (= ULTIMATE.start_main_~a~0 20) [2019-11-20 00:58:02,071 INFO L444 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2019-11-20 00:58:02,071 INFO L444 ceAbstractionStarter]: For program point L11(lines 11 18) no Hoare annotation was computed. [2019-11-20 00:58:02,072 INFO L444 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2019-11-20 00:58:02,072 INFO L440 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (<= 1 sum_~n)) [2019-11-20 00:58:02,072 INFO L444 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2019-11-20 00:58:02,072 INFO L444 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2019-11-20 00:58:02,072 INFO L444 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2019-11-20 00:58:02,072 INFO L447 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2019-11-20 00:58:02,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 12:58:02 BoogieIcfgContainer [2019-11-20 00:58:02,074 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 00:58:02,074 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 00:58:02,074 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 00:58:02,075 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 00:58:02,075 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:57:35" (3/4) ... [2019-11-20 00:58:02,078 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 00:58:02,090 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2019-11-20 00:58:02,094 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-20 00:58:02,094 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-20 00:58:02,129 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d5d8cb4c-c60f-44fb-8add-06fbd7b95749/bin/uautomizer/witness.graphml [2019-11-20 00:58:02,129 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 00:58:02,130 INFO L168 Benchmark]: Toolchain (without parser) took 27491.46 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 476.1 MB). Free memory was 951.5 MB in the beginning and 1.0 GB in the end (delta: -86.0 MB). Peak memory consumption was 390.1 MB. Max. memory is 11.5 GB. [2019-11-20 00:58:02,131 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:58:02,131 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 951.5 MB in the beginning and 1.1 GB in the end (delta: -190.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-20 00:58:02,131 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.10 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. [2019-11-20 00:58:02,131 INFO L168 Benchmark]: Boogie Preprocessor took 15.66 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. [2019-11-20 00:58:02,132 INFO L168 Benchmark]: RCFGBuilder took 193.59 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-11-20 00:58:02,132 INFO L168 Benchmark]: TraceAbstraction took 26953.89 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 329.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 83.0 MB). Peak memory consumption was 412.3 MB. Max. memory is 11.5 GB. [2019-11-20 00:58:02,132 INFO L168 Benchmark]: Witness Printer took 54.61 ms. Allocated memory is still 1.5 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 11.5 GB. [2019-11-20 00:58:02,134 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 241.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 951.5 MB in the beginning and 1.1 GB in the end (delta: -190.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.10 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 15.66 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 193.59 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 26953.89 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 329.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 83.0 MB). Peak memory consumption was 412.3 MB. Max. memory is 11.5 GB. * Witness Printer took 54.61 ms. Allocated memory is still 1.5 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 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: 26.9s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 7.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 187 SDtfs, 730 SDslu, 1980 SDs, 0 SdLazy, 3532 SolverSat, 248 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2431 GetRequests, 1817 SyntacticMatches, 0 SemanticMatches, 614 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6181 ImplicationChecksByTransitivity, 12.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 14 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 12.8s InterpolantComputationTime, 2889 NumberOfCodeBlocks, 2889 NumberOfCodeBlocksAsserted, 144 NumberOfCheckSat, 2848 ConstructedInterpolants, 0 QuantifiedInterpolants, 804736 SizeOfPredicates, 254 NumberOfNonLiveVariables, 4340 ConjunctsInSsa, 633 ConjunctsInUnsatCore, 41 InterpolantComputations, 1 PerfectInterpolantSequences, 9390/17640 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...